]> de.git.xonotic.org Git - xonotic/netradiant.git/blobdiff - radiant/brush.h
apply misc fixes from Markus Fischer and Rambetter
[xonotic/netradiant.git] / radiant / brush.h
index 851a9836524270ede2f6ce02c58a0251a38ac44b..08a5e057efe822ec7dcf82c5b8e148d4ea10d72e 100644 (file)
@@ -1,5 +1,5 @@
 /*
-Copyright (C) 1999-2006 Id Software, Inc. and contributors.
+Copyright (C) 1999-2007 id Software, Inc. and contributors.
 For a list of contributors, see the accompanying CONTRIBUTORS file.
 
 This file is part of GtkRadiant.
@@ -19,4200 +19,71 @@ along with GtkRadiant; if not, write to the Free Software
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
 
-#if !defined(INCLUDED_BRUSH_H)
-#define INCLUDED_BRUSH_H
 
-/// \file
-/// \brief The brush primitive.
-///
-/// A collection of planes that define a convex polyhedron.
-/// The Boundary-Representation of this primitive is a manifold polygonal mesh.
-/// Each face polygon is represented by a list of vertices in a \c Winding.
-/// Each vertex is associated with another face that is adjacent to the edge
-/// formed by itself and the next vertex in the winding. This information can
-/// be used to find edge-pairs and vertex-rings.
-
-
-#include "debugging/debugging.h"
-
-#include "itexdef.h"
-#include "iundo.h"
-#include "iselection.h"
-#include "irender.h"
-#include "imap.h"
-#include "ibrush.h"
-#include "igl.h"
-#include "ifilter.h"
-#include "nameable.h"
-#include "moduleobserver.h"
-
-#include <set>
-
-#include "cullable.h"
-#include "renderable.h"
-#include "selectable.h"
-#include "editable.h"
-#include "mapfile.h"
-
-#include "math/frustum.h"
-#include "selectionlib.h"
-#include "render.h"
-#include "texturelib.h"
-#include "container/container.h"
-#include "generic/bitfield.h"
-#include "signal/signalfwd.h"
-
-#include "winding.h"
-#include "brush_primit.h"
-
-const unsigned int BRUSH_DETAIL_FLAG = 27;
-const unsigned int BRUSH_DETAIL_MASK = (1 << BRUSH_DETAIL_FLAG);
-
-enum EBrushType
-{
-  eBrushTypeQuake,
-  eBrushTypeQuake2,
-  eBrushTypeQuake3,
-  eBrushTypeQuake3BP,
-  eBrushTypeDoom3,
-  eBrushTypeQuake4,
-  eBrushTypeHalfLife,
-};
-
-
-#define BRUSH_CONNECTIVITY_DEBUG 0
-#define BRUSH_DEGENERATE_DEBUG 0
-
-template<typename TextOuputStreamType>
-inline TextOuputStreamType& ostream_write(TextOuputStreamType& ostream, const Matrix4& m)
-{
-  return ostream << "(" << m[0] << " " << m[1] << " " << m[2] << " " << m[3] << ", "
-    << m[4] << " " << m[5] << " " << m[6] << " " << m[7] << ", "
-    << m[8] << " " << m[9] << " " << m[10] << " " << m[11] << ", "
-    << m[12] << " " << m[13] << " " << m[14] << " " << m[15] << ")";
-}
-
-inline void print_vector3(const Vector3& v)
-{
-  globalOutputStream() << "( " << v.x() << " " << v.y() << " " << v.z() << " )\n";
-}
-
-inline void print_3x3(const Matrix4& m)
-{
-  globalOutputStream() << "( " << m.xx() << " " << m.xy() << " " << m.xz() << " ) "
-    << "( " << m.yx() << " " << m.yy() << " " << m.yz() << " ) "
-    << "( " << m.zx() << " " << m.zy() << " " << m.zz() << " )\n";
-}
-
-
-
-inline bool texdef_sane(const texdef_t& texdef)
-{
-  return fabs(texdef.shift[0]) < (1 << 16)
-    && fabs(texdef.shift[1]) < (1 << 16);
-}
-
-inline void Winding_DrawWireframe(const Winding& winding)
-{
-  glVertexPointer(3, GL_FLOAT, sizeof(WindingVertex), &winding.points.data()->vertex);
-  glDrawArrays(GL_LINE_LOOP, 0, GLsizei(winding.numpoints));
-}
-
-inline void Winding_Draw(const Winding& winding, const Vector3& normal, RenderStateFlags state)
-{
-  glVertexPointer(3, GL_FLOAT, sizeof(WindingVertex), &winding.points.data()->vertex);
-
-  if((state & RENDER_BUMP) != 0)
-  {
-    Vector3 normals[c_brush_maxFaces];
-    typedef Vector3* Vector3Iter;
-    for(Vector3Iter i = normals, end = normals + winding.numpoints; i != end; ++i)
-    {
-      *i = normal;
-    }
-    if(GlobalShaderCache().useShaderLanguage())
-    {
-      glNormalPointer(GL_FLOAT, sizeof(Vector3), normals);
-      glVertexAttribPointerARB(c_attr_TexCoord0, 2, GL_FLOAT, 0, sizeof(WindingVertex), &winding.points.data()->texcoord);
-      glVertexAttribPointerARB(c_attr_Tangent, 3, GL_FLOAT, 0, sizeof(WindingVertex), &winding.points.data()->tangent);
-      glVertexAttribPointerARB(c_attr_Binormal, 3, GL_FLOAT, 0, sizeof(WindingVertex), &winding.points.data()->bitangent);
-    }
-    else
-    {
-      glVertexAttribPointerARB(11, 3, GL_FLOAT, 0, sizeof(Vector3), normals);
-      glVertexAttribPointerARB(8, 2, GL_FLOAT, 0, sizeof(WindingVertex), &winding.points.data()->texcoord);
-      glVertexAttribPointerARB(9, 3, GL_FLOAT, 0, sizeof(WindingVertex), &winding.points.data()->tangent);
-      glVertexAttribPointerARB(10, 3, GL_FLOAT, 0, sizeof(WindingVertex), &winding.points.data()->bitangent);
-    }
-  }
-  else
-  {
-    if (state & RENDER_LIGHTING)
-    {
-      Vector3 normals[c_brush_maxFaces];
-      typedef Vector3* Vector3Iter;
-      for(Vector3Iter i = normals, last = normals + winding.numpoints; i != last; ++i)
-      {
-        *i = normal;
-      }
-      glNormalPointer(GL_FLOAT, sizeof(Vector3), normals);
-    }
-
-    if (state & RENDER_TEXTURE)
-    {
-      glTexCoordPointer(2, GL_FLOAT, sizeof(WindingVertex), &winding.points.data()->texcoord);
-    }
-  }
-#if 0
-  if (state & RENDER_FILL)
-  {
-    glDrawArrays(GL_TRIANGLE_FAN, 0, GLsizei(winding.numpoints));
-  }
-  else
-  {
-    glDrawArrays(GL_LINE_LOOP, 0, GLsizei(winding.numpoints));
-  }
-#else
-  glDrawArrays(GL_POLYGON, 0, GLsizei(winding.numpoints));
-#endif
-
-#if 0
-  const Winding& winding = winding;
-
-  if(state & RENDER_FILL)
-  {
-    glBegin(GL_POLYGON);
-  }
-  else
-  {
-    glBegin(GL_LINE_LOOP);
-  }
-
-  if (state & RENDER_LIGHTING)
-    glNormal3fv(normal);
-
-  for(int i = 0; i < winding.numpoints; ++i)
-  {
-    if (state & RENDER_TEXTURE)
-      glTexCoord2fv(&winding.points[i][3]);
-    glVertex3fv(winding.points[i]);
-  }
-  glEnd();
-#endif
-}
-
-
-#include "shaderlib.h"
-
-typedef DoubleVector3 PlanePoints[3];
-
-inline bool planepts_equal(const PlanePoints planepts, const PlanePoints other)
-{
-  return planepts[0] == other[0] && planepts[1] == other[1] && planepts[2] == other[2];
-}
-
-inline void planepts_assign(PlanePoints planepts, const PlanePoints other)
-{
-  planepts[0] = other[0];
-  planepts[1] = other[1];
-  planepts[2] = other[2];
-}
-
-inline void planepts_quantise(PlanePoints planepts, double snap)
-{
-  vector3_snap(planepts[0], snap);
-  vector3_snap(planepts[1], snap);
-  vector3_snap(planepts[2], snap);
-}
-
-inline float vector3_max_component(const Vector3& vec3)
-{
-  return std::max(fabsf(vec3[0]), std::max(fabsf(vec3[1]), fabsf(vec3[2])));
-}
-
-inline void edge_snap(Vector3& edge, double snap)
-{
-  float scale = static_cast<float>(ceil(fabs(snap / vector3_max_component(edge))));
-  if(scale > 0.0f)
-  {
-    vector3_scale(edge, scale);
-  }
-  vector3_snap(edge, snap);
-}
-
-inline void planepts_snap(PlanePoints planepts, double snap)
-{
-  Vector3 edge01(vector3_subtracted(planepts[1], planepts[0]));
-  Vector3 edge12(vector3_subtracted(planepts[2], planepts[1]));
-  Vector3 edge20(vector3_subtracted(planepts[0], planepts[2]));
-
-  double length_squared_01 = vector3_dot(edge01, edge01);
-  double length_squared_12 = vector3_dot(edge12, edge12);
-  double length_squared_20 = vector3_dot(edge20, edge20);
-
-  vector3_snap(planepts[0], snap);
-
-  if(length_squared_01 < length_squared_12)
-  {
-    if(length_squared_12 < length_squared_20)
-    {
-      edge_snap(edge01, snap);
-      edge_snap(edge12, snap);
-      planepts[1] = vector3_added(planepts[0], edge01);
-      planepts[2] = vector3_added(planepts[1], edge12);
-    }
-    else
-    {
-      edge_snap(edge20, snap);
-      edge_snap(edge01, snap);
-      planepts[1] = vector3_added(planepts[0], edge20);
-      planepts[2] = vector3_added(planepts[1], edge01);
-    }
-  }
-  else
-  {
-    if(length_squared_01 < length_squared_20)
-    {
-      edge_snap(edge01, snap);
-      edge_snap(edge12, snap);
-      planepts[1] = vector3_added(planepts[0], edge01);
-      planepts[2] = vector3_added(planepts[1], edge12);
-    }
-    else
-    {
-      edge_snap(edge12, snap);
-      edge_snap(edge20, snap);
-      planepts[1] = vector3_added(planepts[0], edge12);
-      planepts[2] = vector3_added(planepts[1], edge20);
-    }
-  }
-}
-
-inline PointVertex pointvertex_for_planept(const DoubleVector3& point, const Colour4b& colour)
-{
-  return PointVertex(
-    Vertex3f(
-      static_cast<float>(point.x()),
-      static_cast<float>(point.y()),
-      static_cast<float>(point.z())
-    ),
-    colour
-  );
-}
-
-inline PointVertex pointvertex_for_windingpoint(const Vector3& point, const Colour4b& colour)
-{
-  return PointVertex(
-    vertex3f_for_vector3(point),
-    colour
-  );
-}
-
-inline bool check_plane_is_integer(const PlanePoints& planePoints)
-{
-  return !float_is_integer(planePoints[0][0])
-    || !float_is_integer(planePoints[0][1])
-    || !float_is_integer(planePoints[0][2])
-    || !float_is_integer(planePoints[1][0])
-    || !float_is_integer(planePoints[1][1])
-    || !float_is_integer(planePoints[1][2])
-    || !float_is_integer(planePoints[2][0])
-    || !float_is_integer(planePoints[2][1])
-    || !float_is_integer(planePoints[2][2]);
-}
-
-inline void brush_check_shader(const char* name)
-{
-  if(!shader_valid(name))
-  {
-    globalErrorStream() << "brush face has invalid texture name: '" << name << "'\n";
-  }
-}
-
-class FaceShaderObserver
-{
-public:
-  virtual void realiseShader() = 0;
-  virtual void unrealiseShader() = 0;
-};
-
-class FaceShaderObserverRealise
-{
-public:
-  void operator()(FaceShaderObserver& observer) const
-  {
-    observer.realiseShader();
-  }
-};
-
-class FaceShaderObserverUnrealise
-{
-public:
-  void operator()(FaceShaderObserver& observer) const
-  {
-    observer.unrealiseShader();
-  }
-};
-
-typedef ReferencePair<FaceShaderObserver> FaceShaderObserverPair;
-
-
-class ContentsFlagsValue
-{
-public:
-  ContentsFlagsValue()
-  {
-  }
-  ContentsFlagsValue(int surfaceFlags, int contentFlags, int value, bool specified) :
-    m_surfaceFlags(surfaceFlags),
-    m_contentFlags(contentFlags),
-    m_value(value),
-    m_specified(specified)
-  {
-  }
-  int m_surfaceFlags;
-  int m_contentFlags;
-  int m_value;
-  bool m_specified;
-};
-
-inline void ContentsFlagsValue_assignMasked(ContentsFlagsValue& flags, const ContentsFlagsValue& other)
-{
-  bool detail = bitfield_enabled(flags.m_contentFlags, BRUSH_DETAIL_MASK);
-  flags = other;
-  if(detail)
-  {
-    flags.m_contentFlags = bitfield_enable(flags.m_contentFlags, BRUSH_DETAIL_MASK);
-  }
-  else
-  {
-    flags.m_contentFlags = bitfield_disable(flags.m_contentFlags, BRUSH_DETAIL_MASK);
-  }
-}
-
-
-class FaceShader : public ModuleObserver
-{
-public:
-  class SavedState
-  {
-  public:
-    CopiedString m_shader;
-    ContentsFlagsValue m_flags;
-
-    SavedState(const FaceShader& faceShader)
-    {
-      m_shader = faceShader.getShader();
-      m_flags = faceShader.m_flags;
-    }
-
-    void exportState(FaceShader& faceShader) const
-    {
-      faceShader.setShader(m_shader.c_str());
-      faceShader.setFlags(m_flags);
-    }
-  };
-
-  CopiedString m_shader;
-  Shader* m_state;
-  ContentsFlagsValue m_flags;
-  FaceShaderObserverPair m_observers;
-  bool m_instanced;
-  bool m_realised;
-
-  FaceShader(const char* shader, const ContentsFlagsValue& flags = ContentsFlagsValue(0, 0, 0, false)) :
-    m_shader(shader),
-    m_state(0),
-    m_flags(flags),
-    m_instanced(false),
-    m_realised(false)
-  {
-    captureShader();
-  }
-  ~FaceShader()
-  {
-    releaseShader();
-  }
-  // copy-construction not supported
-  FaceShader(const FaceShader& other);
-
-  void instanceAttach()
-  {
-    m_instanced = true;
-    m_state->incrementUsed();
-  }
-  void instanceDetach()
-  {
-    m_state->decrementUsed();
-    m_instanced = false;
-  }
-
-  void captureShader()
-  {
-    ASSERT_MESSAGE(m_state == 0, "shader cannot be captured");
-    brush_check_shader(m_shader.c_str());
-    m_state = GlobalShaderCache().capture(m_shader.c_str());
-    m_state->attach(*this);
-  }
-  void releaseShader()
-  {
-    ASSERT_MESSAGE(m_state != 0, "shader cannot be released");
-    m_state->detach(*this);
-    GlobalShaderCache().release(m_shader.c_str());
-    m_state = 0;
-  }
-
-  void realise()
-  {
-    ASSERT_MESSAGE(!m_realised, "FaceTexdef::realise: already realised");
-    m_realised = true;
-    m_observers.forEach(FaceShaderObserverRealise());
-  }
-  void unrealise()
-  {
-    ASSERT_MESSAGE(m_realised, "FaceTexdef::unrealise: already unrealised");
-    m_observers.forEach(FaceShaderObserverUnrealise());
-    m_realised = false;
-  }
-
-  void attach(FaceShaderObserver& observer)
-  {
-    m_observers.attach(observer);
-    if(m_realised)
-    {
-      observer.realiseShader();
-    }
-  }
-
-  void detach(FaceShaderObserver& observer)
-  {
-    if(m_realised)
-    {
-      observer.unrealiseShader();
-    }
-    m_observers.detach(observer);
-  }
-
-  const char* getShader() const
-  {
-    return m_shader.c_str();
-  }
-  void setShader(const char* name)
-  {
-    if(m_instanced)
-    {
-      m_state->decrementUsed();
-    }
-    releaseShader();
-    m_shader = name;
-    captureShader();
-    if(m_instanced)
-    {
-      m_state->incrementUsed();
-    }
-  }
-  ContentsFlagsValue getFlags() const
-  {
-    ASSERT_MESSAGE(m_realised, "FaceShader::getFlags: flags not valid when unrealised");
-    if(!m_flags.m_specified)
-    {
-      return ContentsFlagsValue(
-        m_state->getTexture().surfaceFlags,
-        m_state->getTexture().contentFlags,
-        m_state->getTexture().value,
-        true
-      );
-    }
-    return m_flags;
-  }
-  void setFlags(const ContentsFlagsValue& flags)
-  {
-    ASSERT_MESSAGE(m_realised, "FaceShader::setFlags: flags not valid when unrealised");
-    ContentsFlagsValue_assignMasked(m_flags, flags);
-  }
-
-  Shader* state() const
-  {
-    return m_state;
-  }
-
-  std::size_t width() const
-  {
-    if(m_realised)
-    {
-      return m_state->getTexture().width;
-    }
-    return 1;
-  }
-  std::size_t height() const
-  {
-    if(m_realised)
-    {
-      return m_state->getTexture().height;
-    }
-    return 1;
-  }
-  unsigned int shaderFlags() const
-  {
-    if(m_realised)
-    {
-      return m_state->getFlags();
-    }
-    return 0;
-  }
-};
-
-
-
-
-class FaceTexdef : public FaceShaderObserver
-{
-  // not copyable
-  FaceTexdef(const FaceTexdef& other);
-  // not assignable
-  FaceTexdef& operator=(const FaceTexdef& other);
-public:
-  class SavedState
-  {
-  public:
-    TextureProjection m_projection;
-
-    SavedState(const FaceTexdef& faceTexdef)
-    {
-      m_projection = faceTexdef.m_projection;
-    }
-
-    void exportState(FaceTexdef& faceTexdef) const
-    {
-      Texdef_Assign(faceTexdef.m_projection, m_projection);
-    }
-  };
-
-  FaceShader& m_shader;
-  TextureProjection m_projection;
-  bool m_projectionInitialised;
-  bool m_scaleApplied;
-
-  FaceTexdef(
-    FaceShader& shader,
-    const TextureProjection& projection,
-    bool projectionInitialised = true
-  ) :
-    m_shader(shader),
-    m_projection(projection),
-    m_projectionInitialised(projectionInitialised),
-    m_scaleApplied(false)
-  {
-    m_shader.attach(*this);
-  }
-  ~FaceTexdef()
-  {
-    m_shader.detach(*this);
-  }
-
-  void addScale()
-  {
-    ASSERT_MESSAGE(!m_scaleApplied, "texture scale aready added");
-    m_scaleApplied = true;
-    m_projection.m_brushprimit_texdef.addScale(m_shader.width(), m_shader.height());
-  }
-  void removeScale()
-  {
-    ASSERT_MESSAGE(m_scaleApplied, "texture scale aready removed");
-    m_scaleApplied = false;
-    m_projection.m_brushprimit_texdef.removeScale(m_shader.width(), m_shader.height());
-  }
-
-  void realiseShader()
-  {
-    if(m_projectionInitialised && !m_scaleApplied)
-    {
-      addScale();
-    }
-  }
-  void unrealiseShader()
-  {
-    if(m_projectionInitialised && m_scaleApplied)
-    {
-      removeScale();
-    }
-  }
-
-  void setTexdef(const TextureProjection& projection)
-  {
-    removeScale();
-    Texdef_Assign(m_projection, projection);
-    addScale();
-  }
-
-  void shift(float s, float t)
-  {
-    ASSERT_MESSAGE(texdef_sane(m_projection.m_texdef), "FaceTexdef::shift: bad texdef");
-    removeScale();
-    Texdef_Shift(m_projection, s, t);
-    addScale();
-  }
-
-  void scale(float s, float t)
-  {
-    removeScale();
-    Texdef_Scale(m_projection, s, t);
-    addScale();
-  }
-
-  void rotate(float angle)
-  {
-    removeScale();
-    Texdef_Rotate(m_projection, angle);
-    addScale();
-  }
-
-  void fit(const Vector3& normal, const Winding& winding, float s_repeat, float t_repeat)
-  {
-    Texdef_FitTexture(m_projection, m_shader.width(), m_shader.height(), normal, winding, s_repeat, t_repeat);
-  }
-
-  void emitTextureCoordinates(Winding& winding, const Vector3& normal, const Matrix4& localToWorld)
-  {
-    Texdef_EmitTextureCoordinates(m_projection, m_shader.width(), m_shader.height(), winding, normal, localToWorld);
-  }
-
-  void transform(const Plane3& plane, const Matrix4& matrix)
-  {
-    removeScale();
-    Texdef_transformLocked(m_projection, m_shader.width(), m_shader.height(), plane, matrix);
-    addScale();
-  }
-
-  TextureProjection normalised() const
-  {
-    brushprimit_texdef_t tmp(m_projection.m_brushprimit_texdef);
-    tmp.removeScale(m_shader.width(), m_shader.height());
-    return TextureProjection(m_projection.m_texdef, tmp, m_projection.m_basis_s, m_projection.m_basis_t);
-  }
-  void setBasis(const Vector3& normal)
-  {
-    Matrix4 basis;
-    Normal_GetTransform(normal, basis);
-    m_projection.m_basis_s = Vector3(basis.xx(), basis.yx(), basis.zx());
-    m_projection.m_basis_t = Vector3(-basis.xy(), -basis.yy(), -basis.zy());
-  }
-};
-
-inline void planepts_print(const PlanePoints& planePoints, TextOutputStream& ostream)
-{
-  ostream << "( " << planePoints[0][0] << " " << planePoints[0][1] << " " << planePoints[0][2] << " ) "
-    << "( " << planePoints[1][0] << " " << planePoints[1][1] << " " << planePoints[1][2] << " ) "
-    << "( " << planePoints[2][0] << " " << planePoints[2][1] << " " << planePoints[2][2] << " )";
-}
-
-
-inline Plane3 Plane3_applyTranslation(const Plane3& plane, const Vector3& translation)
-{
-  Plane3 tmp(plane3_translated(Plane3(plane.normal(), -plane.dist()), translation));
-  return Plane3(tmp.normal(), -tmp.dist());
-}
-
-inline Plane3 Plane3_applyTransform(const Plane3& plane, const Matrix4& matrix)
-{
-  Plane3 tmp(plane3_transformed(Plane3(plane.normal(), -plane.dist()), matrix));
-  return Plane3(tmp.normal(), -tmp.dist());
-}
-
-class FacePlane
-{
-  PlanePoints m_planepts;
-  Plane3 m_planeCached;
-  Plane3 m_plane;
-public:
-  Vector3 m_funcStaticOrigin;
-
-  static EBrushType m_type;
-
-  static bool isDoom3Plane()
-  {
-    return FacePlane::m_type == eBrushTypeDoom3 || FacePlane::m_type == eBrushTypeQuake4;
-  }
-
-  class SavedState
-  {
-  public:
-    PlanePoints m_planepts;
-    Plane3 m_plane;
-
-    SavedState(const FacePlane& facePlane)
-    {
-      if(facePlane.isDoom3Plane())
-      {
-        m_plane = facePlane.m_plane;
-      }
-      else
-      {
-        planepts_assign(m_planepts, facePlane.planePoints());
-      }
-    }
-
-    void exportState(FacePlane& facePlane) const
-    {
-      if(facePlane.isDoom3Plane())
-      {
-        facePlane.m_plane = m_plane;
-        facePlane.updateTranslated();
-      }
-      else
-      {
-        planepts_assign(facePlane.planePoints(), m_planepts);
-        facePlane.MakePlane();
-      }
-    }
-  };
-
-  FacePlane() : m_funcStaticOrigin(0, 0, 0)
-  {
-  }
-  FacePlane(const FacePlane& other) : m_funcStaticOrigin(0, 0, 0)
-  {
-    if(!isDoom3Plane())
-    {
-      planepts_assign(m_planepts, other.m_planepts);
-      MakePlane();
-    }
-    else
-    {
-      m_plane = other.m_plane;
-      updateTranslated();
-    }
-  }
-
-  void MakePlane()
-  {
-    if(!isDoom3Plane())
-    {
-#if 0
-      if(check_plane_is_integer(m_planepts))
-      {
-        globalErrorStream() << "non-integer planepts: ";
-        planepts_print(m_planepts, globalErrorStream());
-        globalErrorStream() << "\n";
-      }
-#endif
-      m_planeCached = plane3_for_points(m_planepts);
-    }
-  }
-
-  void reverse()
-  {
-    if(!isDoom3Plane())
-    {
-      vector3_swap(m_planepts[0], m_planepts[2]);
-      MakePlane();
-    }
-    else
-    {
-      m_planeCached = plane3_flipped(m_plane);
-      updateSource();
-    }
-  }
-  void transform(const Matrix4& matrix, bool mirror)
-  {
-    if(!isDoom3Plane())
-    {
-
-#if 0
-      bool off = check_plane_is_integer(planePoints());
-#endif
-
-      matrix4_transform_point(matrix, m_planepts[0]);
-      matrix4_transform_point(matrix, m_planepts[1]);
-      matrix4_transform_point(matrix, m_planepts[2]);
-
-      if(mirror)
-      {
-        reverse();
-      }
-
-#if 0
-      if(check_plane_is_integer(planePoints()))
-      {
-        if(!off)
-        {
-          globalErrorStream() << "caused by transform\n";
-        }
-      }
-#endif
-      MakePlane();
-    }
-    else
-    {
-      m_planeCached = Plane3_applyTransform(m_planeCached, matrix);
-      updateSource();
-    }
-  }
-  void offset(float offset)
-  {
-    if(!isDoom3Plane())
-    {
-      Vector3 move(vector3_scaled(m_planeCached.normal(), -offset));
-
-      vector3_subtract(m_planepts[0], move);
-      vector3_subtract(m_planepts[1], move);
-      vector3_subtract(m_planepts[2], move);
-
-      MakePlane();
-    }
-    else
-    {
-      m_planeCached.d += offset;
-      updateSource();
-    }
-  }
-
-  void updateTranslated()
-  {
-    m_planeCached = Plane3_applyTranslation(m_plane, m_funcStaticOrigin);
-  }
-  void updateSource()
-  {
-    m_plane = Plane3_applyTranslation(m_planeCached, vector3_negated(m_funcStaticOrigin));
-  }
-
-
-  PlanePoints& planePoints()
-  {
-    return m_planepts;
-  }
-  const PlanePoints& planePoints() const
-  {
-    return m_planepts;
-  }
-  const Plane3& plane3() const
-  {
-    return m_planeCached;
-  }
-  void setDoom3Plane(const Plane3& plane)
-  {
-    m_plane = plane;
-    updateTranslated();
-  }
-  const Plane3& getDoom3Plane() const
-  {
-    return m_plane;
-  }
-
-  void copy(const FacePlane& other)
-  {
-    if(!isDoom3Plane())
-    {
-      planepts_assign(m_planepts, other.m_planepts);
-      MakePlane();
-    }
-    else
-    {
-      m_planeCached = other.m_plane;
-      updateSource();
-    }
-  }
-  void copy(const Vector3& p0, const Vector3& p1, const Vector3& p2)
-  {
-    if(!isDoom3Plane())
-    {
-      m_planepts[0] = p0;
-      m_planepts[1] = p1;
-      m_planepts[2] = p2;
-      MakePlane();
-    }
-    else
-    {
-      m_planeCached = plane3_for_points(p2, p1, p0);
-      updateSource();
-    }
-  }
-};
-
-inline void Winding_testSelect(Winding& winding, SelectionTest& test, SelectionIntersection& best)
-{
-  test.TestPolygon(VertexPointer(reinterpret_cast<VertexPointer::pointer>(&winding.points.data()->vertex), sizeof(WindingVertex)), winding.numpoints, best);
-}
-
-const double GRID_MIN = 0.125;
-
-inline double quantiseInteger(double f)
-{
-  return float_to_integer(f);
-}
-
-inline double quantiseFloating(double f)
-{
-  return float_snapped(f, 1.f / (1 << 16));
-}
-
-typedef double (*QuantiseFunc)(double f);
-
-class Face;
-
-class FaceFilter
-{
-public:
-  virtual bool filter(const Face& face) const = 0;
-};
-
-bool face_filtered(Face& face);
-void add_face_filter(FaceFilter& filter, int mask, bool invert = false);
-
-void Brush_addTextureChangedCallback(const SignalHandler& callback);
-void Brush_textureChanged();
-
-
-extern bool g_brush_texturelock_enabled;
-
-class FaceObserver
-{
-public:
-  virtual void planeChanged() = 0;
-  virtual void connectivityChanged() = 0;
-  virtual void shaderChanged() = 0;
-  virtual void evaluateTransform() = 0;
-};
-
-class Face :
-public OpenGLRenderable,
-public Filterable,
-public Undoable,
-public FaceShaderObserver
-{
-  std::size_t m_refcount;
-
-  class SavedState : public UndoMemento
-  {
-  public:
-    FacePlane::SavedState m_planeState;
-    FaceTexdef::SavedState m_texdefState;
-    FaceShader::SavedState m_shaderState;
-
-    SavedState(const Face& face) : m_planeState(face.getPlane()), m_texdefState(face.getTexdef()), m_shaderState(face.getShader())
-    {
-    }
-
-    void exportState(Face& face) const
-    {
-      m_planeState.exportState(face.getPlane());
-      m_shaderState.exportState(face.getShader());
-      m_texdefState.exportState(face.getTexdef());
-    }
-
-    void release()
-    {
-      delete this;
-    }
-  };
-
-public:
-  static QuantiseFunc m_quantise;
-  static EBrushType m_type;
-
-  PlanePoints m_move_planepts;
-  PlanePoints m_move_planeptsTransformed;
-private:
-  FacePlane m_plane;
-  FacePlane m_planeTransformed;
-  FaceShader m_shader;
-  FaceTexdef m_texdef;
-  TextureProjection m_texdefTransformed;
-
-  Winding m_winding;
-  Vector3 m_centroid;
-  bool m_filtered;
-
-  FaceObserver* m_observer;
-  UndoObserver* m_undoable_observer;
-  MapFile* m_map;
-
-  // assignment not supported
-  Face& operator=(const Face& other);
-  // copy-construction not supported
-  Face(const Face& other);
-
-public:
-
-  Face(FaceObserver* observer) :
-    m_refcount(0),
-    m_shader(texdef_name_default()),
-    m_texdef(m_shader, TextureProjection(), false),
-    m_filtered(false),
-    m_observer(observer),
-    m_undoable_observer(0),
-    m_map(0)
-  {
-    m_shader.attach(*this);
-    m_plane.copy(Vector3(0, 0, 0), Vector3(64, 0, 0), Vector3(0, 64, 0));
-    m_texdef.setBasis(m_plane.plane3().normal());
-    planeChanged();
-  }
-  Face(
-    const Vector3& p0,
-    const Vector3& p1,
-    const Vector3& p2,
-    const char* shader,
-    const TextureProjection& projection,
-    FaceObserver* observer
-  ) :
-    m_refcount(0),
-    m_shader(shader),
-    m_texdef(m_shader, projection),
-    m_observer(observer),
-    m_undoable_observer(0),
-    m_map(0)
-  {
-    m_shader.attach(*this);
-    m_plane.copy(p0, p1, p2);
-    m_texdef.setBasis(m_plane.plane3().normal());
-    planeChanged();
-    updateFiltered();
-  }
-  Face(const Face& other, FaceObserver* observer) :
-    m_refcount(0),
-    m_shader(other.m_shader.getShader(), other.m_shader.m_flags),
-    m_texdef(m_shader, other.getTexdef().normalised()),
-    m_observer(observer),
-    m_undoable_observer(0),
-    m_map(0)
-  {
-    m_shader.attach(*this);
-    m_plane.copy(other.m_plane);
-    planepts_assign(m_move_planepts, other.m_move_planepts);
-    m_texdef.setBasis(m_plane.plane3().normal());
-    planeChanged();
-    updateFiltered();
-  }
-  ~Face()
-  {
-    m_shader.detach(*this);
-  }
-
-  void planeChanged()
-  {
-    revertTransform();
-    m_observer->planeChanged();
-  }
-
-  void realiseShader()
-  {
-    m_observer->shaderChanged();
-  }
-  void unrealiseShader()
-  {
-  }
-
-  void instanceAttach(MapFile* map)
-  {
-    m_shader.instanceAttach();
-    m_map = map;
-    m_undoable_observer = GlobalUndoSystem().observer(this);
-    GlobalFilterSystem().registerFilterable(*this);
-  }
-  void instanceDetach(MapFile* map)
-  {
-    GlobalFilterSystem().unregisterFilterable(*this);
-    m_undoable_observer = 0;
-    GlobalUndoSystem().release(this);
-    m_map = 0;
-    m_shader.instanceDetach();
-  }
-
-  void render(RenderStateFlags state) const
-  {
-    Winding_Draw(m_winding, m_planeTransformed.plane3().normal(), state);
-  }
-
-  void updateFiltered()
-  {
-    m_filtered = face_filtered(*this);
-  }
-  bool isFiltered() const
-  {
-    return m_filtered;
-  }
-
-  void undoSave()
-  {
-    if(m_map != 0)
-    {
-      m_map->changed();
-    }
-    if(m_undoable_observer != 0)
-    {
-      m_undoable_observer->save(this);
-    }
-  }
-
-  // undoable
-  UndoMemento* exportState() const
-  {
-    return new SavedState(*this);
-  }
-  void importState(const UndoMemento* data)
-  {
-    undoSave();
-
-    static_cast<const SavedState*>(data)->exportState(*this);
-
-    planeChanged();
-    m_observer->connectivityChanged();
-    texdefChanged();
-    m_observer->shaderChanged();
-    updateFiltered();
-  }
-
-  void IncRef()
-  {
-    ++m_refcount;
-  }
-  void DecRef()
-  {
-    if(--m_refcount == 0)
-      delete this;
-  }
-
-  void flipWinding()
-  {
-    m_plane.reverse();
-    planeChanged();
-  }
-
-  bool intersectVolume(const VolumeTest& volume, const Matrix4& localToWorld) const
-  {
-    return volume.TestPlane(Plane3(plane3().normal(), -plane3().dist()), localToWorld);
-  }
-
-  void render(Renderer& renderer, const Matrix4& localToWorld) const
-  {
-    renderer.SetState(m_shader.state(), Renderer::eFullMaterials);
-    renderer.addRenderable(*this, localToWorld);
-  }
-
-  void transform(const Matrix4& matrix, bool mirror)
-  {
-    if(g_brush_texturelock_enabled)
-    {
-      Texdef_transformLocked(m_texdefTransformed, m_shader.width(), m_shader.height(), m_plane.plane3(), matrix);
-    }
-
-    m_planeTransformed.transform(matrix, mirror);
-
-#if 0
-    ASSERT_MESSAGE(projectionaxis_for_normal(normal) == projectionaxis_for_normal(plane3().normal()), "bleh");
-#endif
-    m_observer->planeChanged();
-  }
-
-  void assign_planepts(const PlanePoints planepts)
-  {
-    m_planeTransformed.copy(planepts[0], planepts[1], planepts[2]);
-    m_observer->planeChanged();
-  }
-
-  /// \brief Reverts the transformable state of the brush to identity. 
-  void revertTransform()
-  {
-    m_planeTransformed = m_plane;
-    planepts_assign(m_move_planeptsTransformed, m_move_planepts);
-    m_texdefTransformed = m_texdef.m_projection;
-  }
-  void freezeTransform()
-  {
-    undoSave();
-    m_plane = m_planeTransformed;
-    planepts_assign(m_move_planepts, m_move_planeptsTransformed);
-    m_texdef.m_projection = m_texdefTransformed;
-  }
-
-  void update_move_planepts_vertex(std::size_t index, PlanePoints planePoints)
-  {
-    std::size_t numpoints = getWinding().numpoints;
-    ASSERT_MESSAGE(index < numpoints, "update_move_planepts_vertex: invalid index");
-
-    std::size_t opposite = Winding_Opposite(getWinding(), index);
-    std::size_t adjacent = Winding_wrap(getWinding(), opposite+numpoints-1);
-    planePoints[0] = getWinding()[opposite].vertex;
-    planePoints[1] = getWinding()[index].vertex;
-    planePoints[2] = getWinding()[adjacent].vertex;
-    // winding points are very inaccurate, so they must be quantised before using them to generate the face-plane
-    planepts_quantise(planePoints, GRID_MIN);
-  }
-
-  void snapto(float snap)
-  {
-    if(contributes())
-    {
-#if 0
-      ASSERT_MESSAGE(plane3_valid(m_plane.plane3()), "invalid plane before snap to grid");
-      planepts_snap(m_plane.planePoints(), snap);
-      ASSERT_MESSAGE(plane3_valid(m_plane.plane3()), "invalid plane after snap to grid");
-#else
-      PlanePoints planePoints;
-      update_move_planepts_vertex(0, planePoints);
-      vector3_snap(planePoints[0], snap);
-      vector3_snap(planePoints[1], snap);
-      vector3_snap(planePoints[2], snap);
-      assign_planepts(planePoints);
-      freezeTransform();
-#endif
-      SceneChangeNotify();
-      if(!plane3_valid(m_plane.plane3()))
-      {
-        globalErrorStream() << "WARNING: invalid plane after snap to grid\n";
-      }
-    }
-  }
-
-  void testSelect(SelectionTest& test, SelectionIntersection& best)
-  {
-    Winding_testSelect(m_winding, test, best);
-  }
-
-  void testSelect_centroid(SelectionTest& test, SelectionIntersection& best)
-  {
-    test.TestPoint(m_centroid, best);
-  }
-
-  void shaderChanged()
-  {
-    EmitTextureCoordinates();
-    Brush_textureChanged();
-    m_observer->shaderChanged();
-    updateFiltered();
-       planeChanged();
-    SceneChangeNotify();
-  }
-
-  const char* GetShader() const
-  {
-    return m_shader.getShader();
-  }
-  void SetShader(const char* name)
-  {
-    undoSave();
-    m_shader.setShader(name);
-    shaderChanged();
-  }
-
-  void revertTexdef()
-  {
-    m_texdefTransformed = m_texdef.m_projection;
-  }
-  void texdefChanged()
-  {
-    revertTexdef();
-    EmitTextureCoordinates();
-    Brush_textureChanged();
-  }
-
-  void GetTexdef(TextureProjection& projection) const
-  {
-    projection = m_texdef.normalised();
-  }
-  void SetTexdef(const TextureProjection& projection)
-  {
-    undoSave();
-    m_texdef.setTexdef(projection);
-    texdefChanged();
-  }
-
-  void GetFlags(ContentsFlagsValue& flags) const
-  {
-    flags = m_shader.getFlags();
-  }
-  void SetFlags(const ContentsFlagsValue& flags)
-  {
-    undoSave();
-    m_shader.setFlags(flags);
-    m_observer->shaderChanged();
-    updateFiltered();
-  }
-
-  void ShiftTexdef(float s, float t)
-  {
-    undoSave();
-    m_texdef.shift(s, t);
-    texdefChanged();
-  }
-
-  void ScaleTexdef(float s, float t)
-  {
-    undoSave();
-    m_texdef.scale(s, t);
-    texdefChanged();
-  }
-
-  void RotateTexdef(float angle)
-  {
-    undoSave();
-    m_texdef.rotate(angle);
-    texdefChanged();
-  }
-
-  void FitTexture(float s_repeat, float t_repeat)
-  {
-    undoSave();
-    m_texdef.fit(m_plane.plane3().normal(), m_winding, s_repeat, t_repeat);
-    texdefChanged();
-  }
-
-  void EmitTextureCoordinates()
-  {
-    Texdef_EmitTextureCoordinates(m_texdefTransformed, m_shader.width(), m_shader.height(), m_winding, plane3().normal(), g_matrix4_identity);
-  }
-
-
-  const Vector3& centroid() const
-  {
-    return m_centroid;
-  }
-
-  void construct_centroid()
-  {
-    Winding_Centroid(m_winding, plane3(), m_centroid);
-  }
-
-  const Winding& getWinding() const
-  {
-    return m_winding;
-  }
-  Winding& getWinding()
-  {
-    return m_winding;
-  }
-
-  const Plane3& plane3() const
-  {
-    m_observer->evaluateTransform();
-    return m_planeTransformed.plane3();
-  }
-  FacePlane& getPlane()
-  {
-    return m_plane;
-  }
-  const FacePlane& getPlane() const
-  {
-    return m_plane;
-  }
-  FaceTexdef& getTexdef()
-  {
-    return m_texdef;
-  }
-  const FaceTexdef& getTexdef() const
-  {
-    return m_texdef;
-  }
-  FaceShader& getShader()
-  {
-    return m_shader;
-  }
-  const FaceShader& getShader() const
-  {
-    return m_shader;
-  }
-
-  bool isDetail() const
-  {
-    return (m_shader.m_flags.m_contentFlags & BRUSH_DETAIL_MASK) != 0;
-  }
-  void setDetail(bool detail)
-  {
-    undoSave();
-    if(detail && !isDetail())
-    {
-      m_shader.m_flags.m_contentFlags |= BRUSH_DETAIL_MASK;
-    }
-    else if(!detail && isDetail())
-    {
-      m_shader.m_flags.m_contentFlags &= ~BRUSH_DETAIL_MASK;
-    }
-    m_observer->shaderChanged();
-  }
-
-  bool contributes() const
-  {
-    return m_winding.numpoints > 2;
-  }
-  bool is_bounded() const
-  {
-    for(Winding::const_iterator i = m_winding.begin(); i != m_winding.end(); ++i)
-    {
-      if((*i).adjacent == c_brush_maxFaces)
-      {
-        return false;
-      }
-    }
-    return true;
-  }
-};
-
-
-class FaceVertexId
-{
-  std::size_t m_face;
-  std::size_t m_vertex;
-
-public:
-  FaceVertexId(std::size_t face, std::size_t vertex)
-    : m_face(face), m_vertex(vertex)
-  {
-  }
-
-  std::size_t getFace() const
-  {
-    return m_face;
-  }
-  std::size_t getVertex() const
-  {
-    return m_vertex;
-  }
-};
-
-typedef std::size_t faceIndex_t;
-
-struct EdgeRenderIndices
-{
-  RenderIndex first;
-  RenderIndex second;
-
-  EdgeRenderIndices()
-    : first(0), second(0)
-  {
-  }
-  EdgeRenderIndices(const RenderIndex _first, const RenderIndex _second)
-    : first(_first), second(_second)
-  {
-  }
-};
-
-struct EdgeFaces
-{
-  faceIndex_t first;
-  faceIndex_t second;
-
-  EdgeFaces()
-    : first(c_brush_maxFaces), second(c_brush_maxFaces)
-  {
-  }
-  EdgeFaces(const faceIndex_t _first, const faceIndex_t _second)
-    : first(_first), second(_second)
-  {
-  }
-};
-
-class RenderableWireframe : public OpenGLRenderable
-{
-public:
-  void render(RenderStateFlags state) const
-  {
-#if 1
-    glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(PointVertex), &m_vertices->colour);
-    glVertexPointer(3, GL_FLOAT, sizeof(PointVertex), &m_vertices->vertex);
-    glDrawElements(GL_LINES, GLsizei(m_size<<1), RenderIndexTypeID, m_faceVertex.data());
-#else
-    glBegin(GL_LINES);
-    for(std::size_t i = 0; i < m_size; ++i)
-    {
-      glVertex3fv(&m_vertices[m_faceVertex[i].first].vertex.x);
-      glVertex3fv(&m_vertices[m_faceVertex[i].second].vertex.x);
-    }
-    glEnd();
-#endif
-  }
-
-  Array<EdgeRenderIndices> m_faceVertex;
-  std::size_t m_size;
-  const PointVertex* m_vertices;
-};
-
-class Brush;
-typedef std::vector<Brush*> brush_vector_t;
-
-class BrushFilter
-{
-public:
-  virtual bool filter(const Brush& brush) const = 0;
-};
-
-bool brush_filtered(Brush& brush);
-void add_brush_filter(BrushFilter& filter, int mask, bool invert = false);
-
-
-/// \brief Returns true if 'self' takes priority when building brush b-rep.
-inline bool plane3_inside(const Plane3& self, const Plane3& other)
-{
-  if(vector3_equal_epsilon(self.normal(), other.normal(), 0.001))
-  {
-    return self.dist() < other.dist();
-  }
-  return true;
-}
-
-typedef SmartPointer<Face> FaceSmartPointer;
-typedef std::vector<FaceSmartPointer> Faces;
-
-/// \brief Returns the unique-id of the edge adjacent to \p faceVertex in the edge-pair for the set of \p faces.
-inline FaceVertexId next_edge(const Faces& faces, FaceVertexId faceVertex)
-{
-  std::size_t adjacent_face = faces[faceVertex.getFace()]->getWinding()[faceVertex.getVertex()].adjacent;
-  std::size_t adjacent_vertex = Winding_FindAdjacent(faces[adjacent_face]->getWinding(), faceVertex.getFace());
-
-  ASSERT_MESSAGE(adjacent_vertex != c_brush_maxFaces, "connectivity data invalid");
-  if(adjacent_vertex == c_brush_maxFaces)
-  {
-    return faceVertex;
-  }
-
-  return FaceVertexId(adjacent_face, adjacent_vertex);
-}
-
-/// \brief Returns the unique-id of the vertex adjacent to \p faceVertex in the vertex-ring for the set of \p faces.
-inline FaceVertexId next_vertex(const Faces& faces, FaceVertexId faceVertex)
-{
-  FaceVertexId nextEdge = next_edge(faces, faceVertex);
-  return FaceVertexId(nextEdge.getFace(), Winding_next(faces[nextEdge.getFace()]->getWinding(), nextEdge.getVertex()));
-}
-
-class SelectableEdge
-{
-  Vector3 getEdge() const
-  {
-    const Winding& winding = getFace().getWinding();
-    return vector3_mid(winding[m_faceVertex.getVertex()].vertex, winding[Winding_next(winding, m_faceVertex.getVertex())].vertex);
-  }
-
-public:
-  Faces& m_faces;
-  FaceVertexId m_faceVertex;
-
-  SelectableEdge(Faces& faces, FaceVertexId faceVertex)
-    : m_faces(faces), m_faceVertex(faceVertex)
-  {
-  }
-  SelectableEdge& operator=(const SelectableEdge& other)
-  {
-    m_faceVertex = other.m_faceVertex;
-    return *this;
-  }
-
-  Face& getFace() const
-  {
-    return *m_faces[m_faceVertex.getFace()];
-  }
-
-  void testSelect(SelectionTest& test, SelectionIntersection& best)
-  {
-    test.TestPoint(getEdge(), best);
-  }
-};
-
-class SelectableVertex
-{
-  Vector3 getVertex() const
-  {
-    return getFace().getWinding()[m_faceVertex.getVertex()].vertex;
-  }
-
-public:
-  Faces& m_faces;
-  FaceVertexId m_faceVertex;
-
-  SelectableVertex(Faces& faces, FaceVertexId faceVertex)
-    : m_faces(faces), m_faceVertex(faceVertex)
-  {
-  }
-  SelectableVertex& operator=(const SelectableVertex& other)
-  {
-    m_faceVertex = other.m_faceVertex;
-    return *this;
-  }
-
-  Face& getFace() const
-  {
-    return *m_faces[m_faceVertex.getFace()];
-  }
-
-  void testSelect(SelectionTest& test, SelectionIntersection& best)
-  {
-    test.TestPoint(getVertex(), best);
-  }
-};
-
-class BrushObserver
-{
-public:
-  virtual void reserve(std::size_t size) = 0;
-  virtual void clear() = 0;
-  virtual void push_back(Face& face) = 0;
-  virtual void pop_back() = 0;
-  virtual void erase(std::size_t index) = 0;
-  virtual void connectivityChanged() = 0;
-
-  virtual void edge_clear() = 0;
-  virtual void edge_push_back(SelectableEdge& edge) = 0;
-
-  virtual void vertex_clear() = 0;
-  virtual void vertex_push_back(SelectableVertex& vertex) = 0;
-
-  virtual void DEBUG_verify() const = 0;
-};
-
-class BrushVisitor
-{
-public:
-  virtual void visit(Face& face) const = 0;
-};
-
-class Brush :
-  public TransformNode,
-  public Bounded,
-  public Cullable,
-  public Snappable,
-  public Undoable,
-  public FaceObserver,
-  public Filterable,
-  public Nameable,
-  public BrushDoom3
-{
-private:
-  scene::Node* m_node;
-  typedef UniqueSet<BrushObserver*> Observers;
-  Observers m_observers;
-  UndoObserver* m_undoable_observer;
-  MapFile* m_map;
-
-  // state
-  Faces m_faces;
-  // ----
-
-  // cached data compiled from state
-  Array<PointVertex> m_faceCentroidPoints;
-  RenderablePointArray m_render_faces;
-
-  Array<PointVertex> m_uniqueVertexPoints;
-  typedef std::vector<SelectableVertex> SelectableVertices;
-  SelectableVertices m_select_vertices;
-  RenderablePointArray m_render_vertices;
-
-  Array<PointVertex> m_uniqueEdgePoints;
-  typedef std::vector<SelectableEdge> SelectableEdges;
-  SelectableEdges m_select_edges;
-  RenderablePointArray m_render_edges;
-
-  Array<EdgeRenderIndices> m_edge_indices;
-  Array<EdgeFaces> m_edge_faces;
-
-  AABB m_aabb_local;
-  // ----
-
-  Callback m_evaluateTransform;
-  Callback m_boundsChanged;
-
-  mutable bool m_planeChanged; // b-rep evaluation required
-  mutable bool m_transformChanged; // transform evaluation required
-  // ----
-
-public:  
-  STRING_CONSTANT(Name, "Brush");
-
-  Callback m_lightsChanged;
-
-  // static data
-  static Shader* m_state_point;
-  // ----
-
-  static EBrushType m_type;
-  static double m_maxWorldCoord;
-
-  Brush(scene::Node& node, const Callback& evaluateTransform, const Callback& boundsChanged) :
-    m_node(&node),
-    m_undoable_observer(0),
-    m_map(0),
-    m_render_faces(m_faceCentroidPoints, GL_POINTS),
-    m_render_vertices(m_uniqueVertexPoints, GL_POINTS),
-    m_render_edges(m_uniqueEdgePoints, GL_POINTS),
-    m_evaluateTransform(evaluateTransform),
-    m_boundsChanged(boundsChanged),
-    m_planeChanged(false),
-    m_transformChanged(false)
-  {
-    planeChanged();
-  }
-  Brush(const Brush& other, scene::Node& node, const Callback& evaluateTransform, const Callback& boundsChanged) :
-    m_node(&node),
-    m_undoable_observer(0),
-    m_map(0),
-    m_render_faces(m_faceCentroidPoints, GL_POINTS),
-    m_render_vertices(m_uniqueVertexPoints, GL_POINTS),
-    m_render_edges(m_uniqueEdgePoints, GL_POINTS),
-    m_evaluateTransform(evaluateTransform),
-    m_boundsChanged(boundsChanged),
-    m_planeChanged(false),
-    m_transformChanged(false)
-  {
-    copy(other);
-  }
-  Brush(const Brush& other) :
-    TransformNode(other),
-    Bounded(other),
-    Cullable(other),
-    Snappable(),
-    Undoable(other),
-    FaceObserver(other),
-    Filterable(other),
-    Nameable(other),
-    BrushDoom3(other),
-    m_node(0),
-    m_undoable_observer(0),
-    m_map(0),
-    m_render_faces(m_faceCentroidPoints, GL_POINTS),
-    m_render_vertices(m_uniqueVertexPoints, GL_POINTS),
-    m_render_edges(m_uniqueEdgePoints, GL_POINTS),
-    m_planeChanged(false),
-    m_transformChanged(false)
-  {
-    copy(other);
-  }
-  ~Brush()
-  {
-    ASSERT_MESSAGE(m_observers.empty(), "Brush::~Brush: observers still attached");
-  }
-
-  // assignment not supported
-  Brush& operator=(const Brush& other);
-
-  void setDoom3GroupOrigin(const Vector3& origin)
-  {
-    //globalOutputStream() << "func_static origin before: " << m_funcStaticOrigin << " after: " << origin << "\n";
-    for(Faces::iterator i = m_faces.begin(); i != m_faces.end(); ++i)
-    {
-      (*i)->getPlane().m_funcStaticOrigin = origin;
-      (*i)->getPlane().updateTranslated();
-      (*i)->planeChanged();
-    }
-    planeChanged();
-  }
-
-  void attach(BrushObserver& observer)
-  {
-    for(Faces::iterator i = m_faces.begin(); i != m_faces.end(); ++i)
-    {
-      observer.push_back(*(*i));
-    }
-
-    for(SelectableEdges::iterator i = m_select_edges.begin(); i !=m_select_edges.end(); ++i)
-    {
-      observer.edge_push_back(*i);
-    }
-
-    for(SelectableVertices::iterator i = m_select_vertices.begin(); i != m_select_vertices.end(); ++i)
-    {
-      observer.vertex_push_back(*i);
-    }
-
-    m_observers.insert(&observer);
-  }
-  void detach(BrushObserver& observer)
-  {
-    m_observers.erase(&observer);
-  }
-
-  void forEachFace(const BrushVisitor& visitor) const
-  {
-    for(Faces::const_iterator i = m_faces.begin(); i != m_faces.end(); ++i)
-    {
-      visitor.visit(*(*i));
-    }
-  }
-
-  void forEachFace_instanceAttach(MapFile* map) const
-  {
-    for(Faces::const_iterator i = m_faces.begin(); i != m_faces.end(); ++i)
-    {
-      (*i)->instanceAttach(map);
-    }
-  }
-  void forEachFace_instanceDetach(MapFile* map) const
-  {
-    for(Faces::const_iterator i = m_faces.begin(); i != m_faces.end(); ++i)
-    {
-      (*i)->instanceDetach(map);
-    }
-  }
-
-  InstanceCounter m_instanceCounter;
-  void instanceAttach(const scene::Path& path)
-  {
-    if(++m_instanceCounter.m_count == 1)
-    {
-      m_map = path_find_mapfile(path.begin(), path.end());
-      m_undoable_observer = GlobalUndoSystem().observer(this);
-      GlobalFilterSystem().registerFilterable(*this);
-      forEachFace_instanceAttach(m_map);
-    }
-    else
-    {
-      ASSERT_MESSAGE(path_find_mapfile(path.begin(), path.end()) == m_map, "node is instanced across more than one file");
-    }
-  }
-  void instanceDetach(const scene::Path& path)
-  {
-    if(--m_instanceCounter.m_count == 0)
-    {
-      forEachFace_instanceDetach(m_map);
-      GlobalFilterSystem().unregisterFilterable(*this);
-      m_map = 0;
-      m_undoable_observer = 0;
-      GlobalUndoSystem().release(this);
-    }
-  }
-
-  // nameable
-  const char* name() const
-  {
-    return "brush";
-  }
-  void attach(const NameCallback& callback)
-  {
-  }
-  void detach(const NameCallback& callback)
-  {
-  }
-
-  // filterable
-  void updateFiltered()
-  {
-    if(m_node != 0)
-    {
-      if(brush_filtered(*this))
-      {
-        m_node->enable(scene::Node::eFiltered);
-      }
-      else
-      {
-        m_node->disable(scene::Node::eFiltered);
-      }
-    }
-  }
-
-  // observer
-  void planeChanged()
-  {
-    m_planeChanged = true;
-    aabbChanged();
-    m_lightsChanged();
-  }
-  void shaderChanged()
-  {
-    updateFiltered();
-       planeChanged();
-  }
-
-  void evaluateBRep() const
-  {
-    if(m_planeChanged)
-    {
-      m_planeChanged = false;
-      const_cast<Brush*>(this)->buildBRep();
-    }
-  }
-
-  void transformChanged()
-  {
-    m_transformChanged = true;
-    planeChanged();
-  }
-  typedef MemberCaller<Brush, &Brush::transformChanged> TransformChangedCaller;
-
-  void evaluateTransform()
-  {
-    if(m_transformChanged)
-    {
-      m_transformChanged = false;
-      revertTransform();
-      m_evaluateTransform();
-    }
-  }
-  const Matrix4& localToParent() const
-  {
-    return g_matrix4_identity;
-  }
-  void aabbChanged()
-  {
-    m_boundsChanged();
-  }
-  const AABB& localAABB() const
-  {
-    evaluateBRep();
-    return m_aabb_local;
-  }
-
-  VolumeIntersectionValue intersectVolume(const VolumeTest& test, const Matrix4& localToWorld) const
-  {
-    return test.TestAABB(m_aabb_local, localToWorld);
-  }
-
-  void renderComponents(SelectionSystem::EComponentMode mode, Renderer& renderer, const VolumeTest& volume, const Matrix4& localToWorld) const
-  {
-    switch(mode)
-    {
-    case SelectionSystem::eVertex:
-      renderer.addRenderable(m_render_vertices, localToWorld);
-      break;
-    case SelectionSystem::eEdge:
-      renderer.addRenderable(m_render_edges, localToWorld);
-      break;
-    case SelectionSystem::eFace:
-      renderer.addRenderable(m_render_faces, localToWorld);
-      break;
-    default:
-      break;
-    }
-  }
-
-  void transform(const Matrix4& matrix)
-  {
-    bool mirror = matrix4_handedness(matrix) == MATRIX4_LEFTHANDED;
-
-    for(Faces::iterator i = m_faces.begin(); i != m_faces.end(); ++i)
-    {
-      (*i)->transform(matrix, mirror);
-    }
-  }
-  void snapto(float snap)
-  {
-    for(Faces::iterator i = m_faces.begin(); i != m_faces.end(); ++i)
-    {
-      (*i)->snapto(snap);
-    }
-  }
-  void revertTransform()
-  {
-    for(Faces::iterator i = m_faces.begin(); i != m_faces.end(); ++i)
-    {
-      (*i)->revertTransform();
-    }
-  }
-  void freezeTransform()
-  {
-    for(Faces::iterator i = m_faces.begin(); i != m_faces.end(); ++i)
-    {
-      (*i)->freezeTransform();
-    }
-  }
-
-  /// \brief Returns the absolute index of the \p faceVertex.
-  std::size_t absoluteIndex(FaceVertexId faceVertex)
-  {
-    std::size_t index = 0;
-    for(std::size_t i = 0; i < faceVertex.getFace(); ++i)
-    {
-      index += m_faces[i]->getWinding().numpoints;
-    }
-    return index + faceVertex.getVertex();
-  }
-
-  void appendFaces(const Faces& other)
-  {
-    clear();
-    for(Faces::const_iterator i = other.begin(); i != other.end(); ++i)
-    {
-      push_back(*i);
-    }
-  }
-
-  /// \brief The undo memento for a brush stores only the list of face references - the faces are not copied.
-  class BrushUndoMemento : public UndoMemento
-  {
-  public:
-    BrushUndoMemento(const Faces& faces) : m_faces(faces)
-    {
-    }
-    void release()
-    {
-      delete this;
-    }
-
-    Faces m_faces;
-  };
-
-  void undoSave()
-  {
-    if(m_map != 0)
-    {
-      m_map->changed();
-    }
-    if(m_undoable_observer != 0)
-    {
-      m_undoable_observer->save(this);
-    }
-  }
-
-  UndoMemento* exportState() const
-  {
-    return new BrushUndoMemento(m_faces);
-  }
-
-  void importState(const UndoMemento* state)
-  {
-    undoSave();
-    appendFaces(static_cast<const BrushUndoMemento*>(state)->m_faces);
-    planeChanged();
-
-    for(Observers::iterator i = m_observers.begin(); i != m_observers.end(); ++i)
-    {
-      (*i)->DEBUG_verify();
-    }
-  }
-
-  bool isDetail()
-  {
-    return !m_faces.empty() && m_faces.front()->isDetail();
-  }
-
-  /// \brief Appends a copy of \p face to the end of the face list.
-  Face* addFace(const Face& face)
-  {
-    if(m_faces.size() == c_brush_maxFaces)
-    {
-      return 0;
-    }
-    undoSave();
-    push_back(FaceSmartPointer(new Face(face, this)));
-    m_faces.back()->setDetail(isDetail());
-    planeChanged();
-    return m_faces.back();
-  }
-
-  /// \brief Appends a new face constructed from the parameters to the end of the face list.
-  Face* addPlane(const Vector3& p0, const Vector3& p1, const Vector3& p2, const char* shader, const TextureProjection& projection)
-  {
-    if(m_faces.size() == c_brush_maxFaces)
-    {
-      return 0;
-    }
-    undoSave();
-    push_back(FaceSmartPointer(new Face(p0, p1, p2, shader, projection, this)));
-    m_faces.back()->setDetail(isDetail());
-    planeChanged();
-    return m_faces.back();
-  }
-
-  static void constructStatic(EBrushType type)
-  {
-    m_type = type;
-    Face::m_type = type;
-    FacePlane::m_type = type;
-
-    g_bp_globals.m_texdefTypeId = TEXDEFTYPEID_QUAKE;
-    if(m_type == eBrushTypeQuake3BP || m_type == eBrushTypeDoom3 || m_type == eBrushTypeQuake4)
-    {
-      g_bp_globals.m_texdefTypeId = TEXDEFTYPEID_BRUSHPRIMITIVES;
-      g_brush_texturelock_enabled = true;
-    }
-    else if(m_type == eBrushTypeHalfLife)
-    {
-      g_bp_globals.m_texdefTypeId = TEXDEFTYPEID_HALFLIFE;
-      g_brush_texturelock_enabled = true;
-    }
-
-    Face::m_quantise = (m_type == eBrushTypeQuake) ? quantiseInteger : quantiseFloating;
-
-    m_state_point = GlobalShaderCache().capture("$POINT");
-  }
-  static void destroyStatic()
-  {
-    GlobalShaderCache().release("$POINT");
-  }
-
-  std::size_t DEBUG_size()
-  {
-    return m_faces.size();
-  }
-
-  typedef Faces::const_iterator const_iterator;
-
-  const_iterator begin() const
-  {
-    return m_faces.begin();
-  }
-  const_iterator end() const
-  {
-    return m_faces.end();
-  }
-
-  Face* back()
-  {
-    return m_faces.back();
-  }
-  const Face* back() const
-  {
-    return m_faces.back();
-  }
-  void reserve(std::size_t count)
-  {
-    m_faces.reserve(count);
-    for(Observers::iterator i = m_observers.begin(); i != m_observers.end(); ++i)
-    {
-      (*i)->reserve(count);
-    }
-  }
-  void push_back(Faces::value_type face)
-  {
-    m_faces.push_back(face);
-    if(m_instanceCounter.m_count != 0)
-    {
-      m_faces.back()->instanceAttach(m_map);
-    }
-    for(Observers::iterator i = m_observers.begin(); i != m_observers.end(); ++i)
-    {
-      (*i)->push_back(*face);
-      (*i)->DEBUG_verify();
-    }
-  }
-  void pop_back()
-  {
-    if(m_instanceCounter.m_count != 0)
-    {
-      m_faces.back()->instanceDetach(m_map);
-    }
-    m_faces.pop_back();
-    for(Observers::iterator i = m_observers.begin(); i != m_observers.end(); ++i)
-    {
-      (*i)->pop_back();
-      (*i)->DEBUG_verify();
-    }
-  }
-  void erase(std::size_t index)
-  {
-    if(m_instanceCounter.m_count != 0)
-    {
-      m_faces[index]->instanceDetach(m_map);
-    }
-    m_faces.erase(m_faces.begin() + index);
-    for(Observers::iterator i = m_observers.begin(); i != m_observers.end(); ++i)
-    {
-      (*i)->erase(index);
-      (*i)->DEBUG_verify();
-    }
-  }
-  void connectivityChanged()
-  {
-    for(Observers::iterator i = m_observers.begin(); i != m_observers.end(); ++i)
-    {
-      (*i)->connectivityChanged();
-    }
-  }
-
-
-  void clear()
-  {
-    undoSave();
-    if(m_instanceCounter.m_count != 0)
-    {
-      forEachFace_instanceDetach(m_map);
-    }
-    m_faces.clear();
-    for(Observers::iterator i = m_observers.begin(); i != m_observers.end(); ++i)
-    {
-      (*i)->clear();
-      (*i)->DEBUG_verify();
-    }
-  }
-  std::size_t size() const
-  {
-    return m_faces.size();
-  }
-  bool empty() const
-  {
-    return m_faces.empty();
-  }
-
-  /// \brief Returns true if any face of the brush contributes to the final B-Rep.
-  bool hasContributingFaces() const
-  {
-    for(const_iterator i = begin(); i != end(); ++i)
-    {
-      if((*i)->contributes())
-      {
-        return true;
-      }
-    }
-    return false;
-  }
-
-  /// \brief Removes faces that do not contribute to the brush. This is useful for cleaning up after CSG operations on the brush.
-  /// Note: removal of empty faces is not performed during direct brush manipulations, because it would make a manipulation irreversible if it created an empty face.
-  void removeEmptyFaces()
-  {
-    evaluateBRep();
-
-    {
-      std::size_t i = 0;
-      while(i < m_faces.size())
-      {
-        if(!m_faces[i]->contributes())
-        {
-          erase(i);
-          planeChanged();
-        }
-        else
-        {
-          ++i;
-        }
-      }
-    }
-  }
-
-  /// \brief Constructs \p winding from the intersection of \p plane with the other planes of the brush.
-  void windingForClipPlane(Winding& winding, const Plane3& plane) const
-  {
-    FixedWinding buffer[2];
-    bool swap = false;
-
-    // get a poly that covers an effectively infinite area
-    Winding_createInfinite(buffer[swap], plane, m_maxWorldCoord + 1);
-
-    // chop the poly by all of the other faces
-    {
-      for (std::size_t i = 0;  i < m_faces.size(); ++i)
-      {
-        const Face& clip = *m_faces[i];
-
-        if(plane3_equal(clip.plane3(), plane) 
-          || !plane3_valid(clip.plane3()) || !plane_unique(i)
-          || plane3_opposing(plane, clip.plane3()))
-        {
-          continue;
-        }
-
-        buffer[!swap].clear();
-
-#if BRUSH_CONNECTIVITY_DEBUG
-        globalOutputStream() << "clip vs face: " << i << "\n";
-#endif
-
-        {
-          // flip the plane, because we want to keep the back side
-          Plane3 clipPlane(vector3_negated(clip.plane3().normal()), -clip.plane3().dist());
-          Winding_Clip(buffer[swap], plane, clipPlane, i, buffer[!swap]);
-        }
-
-#if BRUSH_CONNECTIVITY_DEBUG
-        for(FixedWinding::Points::iterator k = buffer[!swap].points.begin(), j = buffer[!swap].points.end() - 1; k != buffer[!swap].points.end(); j = k, ++k)
-        {
-          if(vector3_length_squared(vector3_subtracted((*k).vertex, (*j).vertex)) < 1)
-          {
-            globalOutputStream() << "v: " << std::distance(buffer[!swap].points.begin(), j) << " tiny edge adjacent to face " << (*j).adjacent << "\n";
-          }
-        }
-#endif
-
-        //ASSERT_MESSAGE(buffer[!swap].numpoints != 1, "created single-point winding");
-
-        swap = !swap;
-      }
-    }
-
-    Winding_forFixedWinding(winding, buffer[swap]);
-
-#if BRUSH_CONNECTIVITY_DEBUG
-    Winding_printConnectivity(winding);
-
-    for(Winding::iterator i = winding.begin(), j = winding.end() - 1; i != winding.end(); j = i, ++i)
-    {
-      if(vector3_length_squared(vector3_subtracted((*i).vertex, (*j).vertex)) < 1)
-      {
-        globalOutputStream() << "v: " << std::distance(winding.begin(), j) << " tiny edge adjacent to face " << (*j).adjacent << "\n";
-      }
-    }
-#endif
-  }
-
-  void update_wireframe(RenderableWireframe& wire, const bool* faces_visible) const
-  {
-    wire.m_faceVertex.resize(m_edge_indices.size());
-    wire.m_vertices = m_uniqueVertexPoints.data();
-    wire.m_size = 0;
-    for(std::size_t i = 0; i < m_edge_faces.size(); ++i)
-    {
-      if(faces_visible[m_edge_faces[i].first]
-        || faces_visible[m_edge_faces[i].second])
-      {
-        wire.m_faceVertex[wire.m_size++] = m_edge_indices[i];
-      }
-    }
-  }
-
-
-  void update_faces_wireframe(Array<PointVertex>& wire, const bool* faces_visible) const
-  {
-    std::size_t count = 0;
-    for(std::size_t i = 0; i < m_faceCentroidPoints.size(); ++i)
-    {
-      if(faces_visible[i])
-      {
-        ++count;
-      }
-    }
-
-    wire.resize(count);
-    Array<PointVertex>::iterator p = wire.begin();
-    for(std::size_t i = 0; i < m_faceCentroidPoints.size(); ++i)
-    {
-      if(faces_visible[i])
-      {
-        *p++ = m_faceCentroidPoints[i];
-      }
-    }
-  }
-
-  /// \brief Makes this brush a deep-copy of the \p other.
-  void copy(const Brush& other)
-  {
-    for(Faces::const_iterator i = other.m_faces.begin(); i != other.m_faces.end(); ++i)
-    {
-      addFace(*(*i));
-    }
-    planeChanged();
-  }
-
-private:
-  void edge_push_back(FaceVertexId faceVertex)
-  {
-    m_select_edges.push_back(SelectableEdge(m_faces, faceVertex));
-    for(Observers::iterator i = m_observers.begin(); i != m_observers.end(); ++i)
-    {
-      (*i)->edge_push_back(m_select_edges.back());
-    }
-  }
-  void edge_clear()
-  {
-    m_select_edges.clear();
-    for(Observers::iterator i = m_observers.begin(); i != m_observers.end(); ++i)
-    {
-      (*i)->edge_clear();
-    }
-  }
-  void vertex_push_back(FaceVertexId faceVertex)
-  {
-    m_select_vertices.push_back(SelectableVertex(m_faces, faceVertex));
-    for(Observers::iterator i = m_observers.begin(); i != m_observers.end(); ++i)
-    {
-      (*i)->vertex_push_back(m_select_vertices.back());
-    }
-  }
-  void vertex_clear()
-  {
-    m_select_vertices.clear();
-    for(Observers::iterator i = m_observers.begin(); i != m_observers.end(); ++i)
-    {
-      (*i)->vertex_clear();
-    }
-  }
-
-  /// \brief Returns true if the face identified by \p index is preceded by another plane that takes priority over it.
-  bool plane_unique(std::size_t index) const
-  {
-    // duplicate plane
-    for(std::size_t i = 0; i < m_faces.size(); ++i)
-    {
-      if(index != i && !plane3_inside(m_faces[index]->plane3(), m_faces[i]->plane3()))
-      {
-        return false;
-      }
-    }
-    return true;
-  }
-
-  /// \brief Removes edges that are smaller than the tolerance used when generating brush windings.
-  void removeDegenerateEdges()
-  {
-    for (std::size_t i = 0;  i < m_faces.size(); ++i)
-    {
-      Winding& winding = m_faces[i]->getWinding();
-      for(Winding::iterator j = winding.begin(); j != winding.end();)
-      {
-        std::size_t index = std::distance(winding.begin(), j);
-        std::size_t next = Winding_next(winding, index);
-        if(Edge_isDegenerate(winding[index].vertex, winding[next].vertex))
-        {
-#if BRUSH_DEGENERATE_DEBUG
-          globalOutputStream() << "Brush::buildWindings: face " << i << ": degenerate edge adjacent to " << winding[index].adjacent << "\n";
-#endif
-          Winding& other = m_faces[winding[index].adjacent]->getWinding();
-          std::size_t adjacent = Winding_FindAdjacent(other, i);
-          if(adjacent != c_brush_maxFaces)
-          {
-            other.erase(other.begin() + adjacent);
-          }
-          winding.erase(j);
-        }
-        else
-        {
-          ++j;
-        }
-      }
-    }
-  }
-
-  /// \brief Invalidates faces that have only two vertices in their winding, while preserving edge-connectivity information.
-  void removeDegenerateFaces()
-  {
-    // save adjacency info for degenerate faces
-    for (std::size_t i = 0;  i < m_faces.size(); ++i)
-    {
-      Winding& degen = m_faces[i]->getWinding();
-      
-      if(degen.numpoints == 2)
-      {
-#if BRUSH_DEGENERATE_DEBUG
-        globalOutputStream() << "Brush::buildWindings: face " << i << ": degenerate winding adjacent to " << degen[0].adjacent << ", " << degen[1].adjacent << "\n";
-#endif
-        // this is an "edge" face, where the plane touches the edge of the brush
-        {
-          Winding& winding = m_faces[degen[0].adjacent]->getWinding();
-          std::size_t index = Winding_FindAdjacent(winding, i);
-          if(index != c_brush_maxFaces)
-          {
-#if BRUSH_DEGENERATE_DEBUG
-            globalOutputStream() << "Brush::buildWindings: face " << degen[0].adjacent << ": remapping adjacent " << winding[index].adjacent << " to " << degen[1].adjacent << "\n";
-#endif
-            winding[index].adjacent = degen[1].adjacent;
-          }
-        }
-
-        {
-          Winding& winding = m_faces[degen[1].adjacent]->getWinding();
-          std::size_t index = Winding_FindAdjacent(winding, i);
-          if(index != c_brush_maxFaces)
-          {
-#if BRUSH_DEGENERATE_DEBUG
-            globalOutputStream() << "Brush::buildWindings: face " << degen[1].adjacent << ": remapping adjacent " << winding[index].adjacent << " to " << degen[0].adjacent << "\n";
-#endif
-            winding[index].adjacent = degen[0].adjacent;
-          }
-        }
-
-        degen.resize(0);
-      }
-    }
-  }
-
-  /// \brief Removes edges that have the same adjacent-face as their immediate neighbour.
-  void removeDuplicateEdges()
-  {
-    // verify face connectivity graph
-    for(std::size_t i = 0; i < m_faces.size(); ++i)
-    {
-      //if(m_faces[i]->contributes())
-      {
-        Winding& winding = m_faces[i]->getWinding();
-        for(std::size_t j = 0; j != winding.numpoints;)
-        {
-          std::size_t next = Winding_next(winding, j);
-          if(winding[j].adjacent == winding[next].adjacent)
-          {
-#if BRUSH_DEGENERATE_DEBUG
-            globalOutputStream() << "Brush::buildWindings: face " << i << ": removed duplicate edge adjacent to face " << winding[j].adjacent << "\n";
-#endif
-            winding.erase(winding.begin() + next);
-          }
-          else
-          {
-            ++j;
-          }
-        }
-      }
-    }
-  }
-
-  /// \brief Removes edges that do not have a matching pair in their adjacent-face.
-  void verifyConnectivityGraph()
-  {
-    // verify face connectivity graph
-    for(std::size_t i = 0; i < m_faces.size(); ++i)
-    {
-      //if(m_faces[i]->contributes())
-      {
-        Winding& winding = m_faces[i]->getWinding();
-        for(Winding::iterator j = winding.begin(); j != winding.end();)
-        {
-#if BRUSH_CONNECTIVITY_DEBUG
-          globalOutputStream() << "Brush::buildWindings: face " << i << ": adjacent to face " << (*j).adjacent << "\n";
-#endif
-          // remove unidirectional graph edges
-          if((*j).adjacent == c_brush_maxFaces
-            || Winding_FindAdjacent(m_faces[(*j).adjacent]->getWinding(), i) == c_brush_maxFaces)
-          {
-#if BRUSH_CONNECTIVITY_DEBUG
-            globalOutputStream() << "Brush::buildWindings: face " << i << ": removing unidirectional connectivity graph edge adjacent to face " << (*j).adjacent << "\n";
-#endif
-            winding.erase(j);
-          }
-          else
-          {
-            ++j;
-          }
-        }
-      }
-    }
-  }
-
-  /// \brief Returns true if the brush is a finite volume. A brush without a finite volume extends past the maximum world bounds and is not valid.
-  bool isBounded()
-  {
-    for(const_iterator i = begin(); i != end(); ++i)
-    {
-      if(!(*i)->is_bounded())
-      {
-        return false;
-      }
-    }
-    return true;
-  }
-
-  /// \brief Constructs the polygon windings for each face of the brush. Also updates the brush bounding-box and face texture-coordinates.
-  bool buildWindings()
-  {
-
-    {
-      m_aabb_local = AABB();
-
-      for (std::size_t i = 0;  i < m_faces.size(); ++i)
-      {
-        Face& f = *m_faces[i];
-
-        if(!plane3_valid(f.plane3()) || !plane_unique(i))
-        {
-          f.getWinding().resize(0);
-        }
-        else
-        {
-#if BRUSH_CONNECTIVITY_DEBUG
-          globalOutputStream() << "face: " << i << "\n";
-#endif
-          windingForClipPlane(f.getWinding(), f.plane3());
-
-          // update brush bounds
-          const Winding& winding = f.getWinding();
-          for(Winding::const_iterator i = winding.begin(); i != winding.end(); ++i)
-          {
-            aabb_extend_by_point_safe(m_aabb_local, (*i).vertex);
-          }
-
-          // update texture coordinates
-          f.EmitTextureCoordinates();
-        }
-      }
-    }
-
-    bool degenerate = !isBounded();
-
-    if(!degenerate)
-    {
-      // clean up connectivity information.
-      // these cleanups must be applied in a specific order.
-      removeDegenerateEdges();
-      removeDegenerateFaces();
-      removeDuplicateEdges();
-      verifyConnectivityGraph();
-    }
-
-    return degenerate;
-  }
-
-  /// \brief Constructs the face windings and updates anything that depends on them.
-  void buildBRep();
-};
-
-
-
-class FaceInstance;
-
-class FaceInstanceSet
-{
-  typedef SelectionList<FaceInstance> FaceInstances;
-  FaceInstances m_faceInstances;
-public:
-  void insert(FaceInstance& faceInstance)
-  {
-    m_faceInstances.append(faceInstance);
-  }
-  void erase(FaceInstance& faceInstance)
-  {
-    m_faceInstances.erase(faceInstance);
-  }
-
-  template<typename Functor>
-  void foreach(Functor functor)
-  {
-    for(FaceInstances::iterator i = m_faceInstances.begin(); i != m_faceInstances.end(); ++i)
-    {
-      functor(*(*i));
-    }
-  }
-
-  bool empty() const
-  {
-    return m_faceInstances.empty();
-  }
-  FaceInstance& last() const
-  {
-    return m_faceInstances.back();
-  }
-};
-
-extern FaceInstanceSet g_SelectedFaceInstances;
-
-typedef std::list<std::size_t> VertexSelection;
-
-inline VertexSelection::iterator VertexSelection_find(VertexSelection& self, std::size_t value)
-{
-  return std::find(self.begin(), self.end(), value);
-}
-
-inline VertexSelection::const_iterator VertexSelection_find(const VertexSelection& self, std::size_t value)
-{
-  return std::find(self.begin(), self.end(), value);
-}
-
-inline VertexSelection::iterator VertexSelection_insert(VertexSelection& self, std::size_t value)
-{
-  VertexSelection::iterator i = VertexSelection_find(self, value);
-  if(i == self.end())
-  {
-    self.push_back(value);
-    return --self.end();
-  }
-  return i;
-}
-inline void VertexSelection_erase(VertexSelection& self, std::size_t value)
-{
-  VertexSelection::iterator i = VertexSelection_find(self, value);
-  if(i != self.end())
-  {
-    self.erase(i);
-  }
-}
-
-inline bool triangle_reversed(std::size_t x, std::size_t y, std::size_t z)
-{
-  return !((x < y && y < z) || (z < x && x < y) || (y < z && z < x));
-}
-template<typename Element>
-inline Vector3 triangle_cross(const BasicVector3<Element>& x, const BasicVector3<Element> y, const BasicVector3<Element>& z)
-{
-  return vector3_cross(y - x, z - x);
-}
-template<typename Element>
-inline bool triangles_same_winding(const BasicVector3<Element>& x1, const BasicVector3<Element> y1, const BasicVector3<Element>& z1, const BasicVector3<Element>& x2, const BasicVector3<Element> y2, const BasicVector3<Element>& z2)
-{
-  return vector3_dot(triangle_cross(x1, y1, z1), triangle_cross(x2, y2, z2)) > 0;
-}
-
-
-typedef const Plane3* PlanePointer;
-typedef PlanePointer* PlanesIterator;
-
-class VectorLightList : public LightList
-{
-  typedef std::vector<const RendererLight*> Lights;
-  Lights m_lights;
-public:
-  void addLight(const RendererLight& light)
-  {
-    m_lights.push_back(&light);
-  }
-  void clear()
-  {
-    m_lights.clear();
-  }
-  void evaluateLights() const
-  {
-  }
-  void lightsChanged() const
-  {
-  }
-  void forEachLight(const RendererLightCallback& callback) const
-  {
-    for(Lights::const_iterator i = m_lights.begin(); i != m_lights.end(); ++i)
-    {
-      callback(*(*i));
-    }
-  }
-};
-
-class FaceInstance
-{
-  Face* m_face;
-  ObservedSelectable m_selectable;
-  ObservedSelectable m_selectableVertices;
-  ObservedSelectable m_selectableEdges;
-  SelectionChangeCallback m_selectionChanged;
-
-  VertexSelection m_vertexSelection;
-  VertexSelection m_edgeSelection;
-
-public:
-  mutable VectorLightList m_lights;
-
-  FaceInstance(Face& face, const SelectionChangeCallback& observer) :
-    m_face(&face),
-    m_selectable(SelectedChangedCaller(*this)),
-    m_selectableVertices(observer),
-    m_selectableEdges(observer),
-    m_selectionChanged(observer)
-  {
-  }
-  FaceInstance(const FaceInstance& other) :
-    m_face(other.m_face),
-    m_selectable(SelectedChangedCaller(*this)),
-    m_selectableVertices(other.m_selectableVertices),
-    m_selectableEdges(other.m_selectableEdges),
-    m_selectionChanged(other.m_selectionChanged)
-  {
-  }
-  FaceInstance& operator=(const FaceInstance& other)
-  {
-    m_face = other.m_face;
-    return *this;
-  }
-
-  Face& getFace()
-  {
-    return *m_face;
-  }
-  const Face& getFace() const
-  {
-    return *m_face;
-  }
-
-  void selectedChanged(const Selectable& selectable)
-  {
-    if(selectable.isSelected())
-    {
-      g_SelectedFaceInstances.insert(*this);
-    }
-    else
-    {
-      g_SelectedFaceInstances.erase(*this);
-    }
-    m_selectionChanged(selectable);
-  }
-  typedef MemberCaller1<FaceInstance, const Selectable&, &FaceInstance::selectedChanged> SelectedChangedCaller;
-
-  bool selectedVertices() const
-  {
-    return !m_vertexSelection.empty();
-  }
-  bool selectedEdges() const
-  {
-    return !m_edgeSelection.empty();
-  }
-  bool isSelected() const
-  {
-    return m_selectable.isSelected();
-  }
-
-  bool selectedComponents() const
-  {
-    return selectedVertices() || selectedEdges() || isSelected();
-  }
-  bool selectedComponents(SelectionSystem::EComponentMode mode) const
-  {
-    switch(mode)
-    {
-    case SelectionSystem::eVertex:
-      return selectedVertices();
-    case SelectionSystem::eEdge:
-      return selectedEdges();
-    case SelectionSystem::eFace:
-      return isSelected();
-    default:
-      return false;
-    }
-  }
-  void setSelected(SelectionSystem::EComponentMode mode, bool select)
-  {
-    switch(mode)
-    {
-    case SelectionSystem::eFace:
-      m_selectable.setSelected(select);
-      break;
-    case SelectionSystem::eVertex:
-      ASSERT_MESSAGE(!select, "select-all not supported");
-
-      m_vertexSelection.clear();
-      m_selectableVertices.setSelected(false);
-      break;
-    case SelectionSystem::eEdge:
-      ASSERT_MESSAGE(!select, "select-all not supported");
-
-      m_edgeSelection.clear();
-      m_selectableEdges.setSelected(false);
-      break;
-    default:
-      break;
-    }
-  }
-
-  template<typename Functor>
-  void SelectedVertices_foreach(Functor functor) const
-  {
-    for(VertexSelection::const_iterator i = m_vertexSelection.begin(); i != m_vertexSelection.end(); ++i)
-    {
-      std::size_t index = Winding_FindAdjacent(getFace().getWinding(), *i);
-      if(index != c_brush_maxFaces)
-      {
-        functor(getFace().getWinding()[index].vertex);
-      }
-    }
-  }
-  template<typename Functor>
-  void SelectedEdges_foreach(Functor functor) const
-  {
-    for(VertexSelection::const_iterator i = m_edgeSelection.begin(); i != m_edgeSelection.end(); ++i)
-    {
-      std::size_t index = Winding_FindAdjacent(getFace().getWinding(), *i);
-      if(index != c_brush_maxFaces)
-      {
-        const Winding& winding = getFace().getWinding();
-        std::size_t adjacent = Winding_next(winding, index);
-        functor(vector3_mid(winding[index].vertex, winding[adjacent].vertex));
-      }
-    }
-  }
-  template<typename Functor>
-  void SelectedFaces_foreach(Functor functor) const
-  {
-    if(isSelected())
-    {
-      functor(centroid());
-    }
-  }
-
-  template<typename Functor>
-  void SelectedComponents_foreach(Functor functor) const
-  {
-    SelectedVertices_foreach(functor);
-    SelectedEdges_foreach(functor);
-    SelectedFaces_foreach(functor);
-  }
-
-  void iterate_selected(AABB& aabb) const
-  {
-    SelectedComponents_foreach(AABBExtendByPoint(aabb));
-  }
-
-  class RenderablePointVectorPushBack
-  {
-    RenderablePointVector& m_points;
-  public:
-    RenderablePointVectorPushBack(RenderablePointVector& points) : m_points(points)
-    {
-    }
-    void operator()(const Vector3& point) const
-    {
-      const Colour4b colour_selected(0, 0, 255, 255);
-      m_points.push_back(pointvertex_for_windingpoint(point, colour_selected));
-    }
-  };
-  
-  void iterate_selected(RenderablePointVector& points) const
-  {
-    SelectedComponents_foreach(RenderablePointVectorPushBack(points));
-  }
-  
-  bool intersectVolume(const VolumeTest& volume, const Matrix4& localToWorld) const
-  {
-    return m_face->intersectVolume(volume, localToWorld);
-  }
-
-  void render(Renderer& renderer, const VolumeTest& volume, const Matrix4& localToWorld) const
-  {
-    if(!m_face->isFiltered() && m_face->contributes() && intersectVolume(volume, localToWorld))
-    {
-      renderer.PushState();
-      if(selectedComponents())
-      {
-        renderer.Highlight(Renderer::eFace);
-      }
-      m_face->render(renderer, localToWorld);
-      renderer.PopState();
-    }
-  }
-
-  void testSelect(SelectionTest& test, SelectionIntersection& best)
-  {
-    if(!m_face->isFiltered())
-    {
-      m_face->testSelect(test, best);
-    }
-  }
-  void testSelect(Selector& selector, SelectionTest& test)
-  {
-    SelectionIntersection best;
-    testSelect(test, best);
-    if(best.valid())
-    {
-      Selector_add(selector, m_selectable, best);
-    }
-  }
-  void testSelect_centroid(Selector& selector, SelectionTest& test)
-  {
-    if(m_face->contributes() && !m_face->isFiltered())
-    {
-      SelectionIntersection best;
-      m_face->testSelect_centroid(test, best);
-      if(best.valid())
-      {
-        Selector_add(selector, m_selectable, best);
-      }
-    }
-  }
-
-  void selectPlane(Selector& selector, const Line& line, PlanesIterator first, PlanesIterator last, const PlaneCallback& selectedPlaneCallback)
-  {
-    for(Winding::const_iterator i = getFace().getWinding().begin(); i != getFace().getWinding().end(); ++i)
-    {
-      Vector3 v(vector3_subtracted(line_closest_point(line, (*i).vertex), (*i).vertex));
-      double dot = vector3_dot(getFace().plane3().normal(), v);
-      if(dot <= 0)
-      {
-        return;
-      }
-    }
-
-    Selector_add(selector, m_selectable);
-
-    selectedPlaneCallback(getFace().plane3());
-  }
-  void selectReversedPlane(Selector& selector, const SelectedPlanes& selectedPlanes)
-  {
-    if(selectedPlanes.contains(plane3_flipped(getFace().plane3())))
-    {
-      Selector_add(selector, m_selectable);
-    }
-  }
-
-  void transformComponents(const Matrix4& matrix)
-  {
-    if(isSelected())
-    {
-      m_face->transform(matrix, false);
-    }
-    if(selectedVertices())
-    {
-      if(m_vertexSelection.size() == 1)
-      {
-        matrix4_transform_point(matrix, m_face->m_move_planeptsTransformed[1]);
-        m_face->assign_planepts(m_face->m_move_planeptsTransformed);
-      }
-      else if(m_vertexSelection.size() == 2)
-      {
-        matrix4_transform_point(matrix, m_face->m_move_planeptsTransformed[1]);
-        matrix4_transform_point(matrix, m_face->m_move_planeptsTransformed[2]);
-        m_face->assign_planepts(m_face->m_move_planeptsTransformed);
-      }
-      else if(m_vertexSelection.size() >= 3)
-      {
-        matrix4_transform_point(matrix, m_face->m_move_planeptsTransformed[0]);
-        matrix4_transform_point(matrix, m_face->m_move_planeptsTransformed[1]);
-        matrix4_transform_point(matrix, m_face->m_move_planeptsTransformed[2]);
-        m_face->assign_planepts(m_face->m_move_planeptsTransformed);
-      }
-    }
-    if(selectedEdges())
-    {
-      if(m_edgeSelection.size() == 1)
-      {
-        matrix4_transform_point(matrix, m_face->m_move_planeptsTransformed[0]);
-        matrix4_transform_point(matrix, m_face->m_move_planeptsTransformed[1]);
-        m_face->assign_planepts(m_face->m_move_planeptsTransformed);
-      }
-      else if(m_edgeSelection.size() >= 2)
-      {
-        matrix4_transform_point(matrix, m_face->m_move_planeptsTransformed[0]);
-        matrix4_transform_point(matrix, m_face->m_move_planeptsTransformed[1]);
-        matrix4_transform_point(matrix, m_face->m_move_planeptsTransformed[2]);
-        m_face->assign_planepts(m_face->m_move_planeptsTransformed);
-      }
-    }
-  }
-
-  void snapto(float snap)
-  {
-    m_face->snapto(snap);
-  }
-
-  void snapComponents(float snap)
-  {
-    if(isSelected())
-    {
-      snapto(snap);
-    }
-    if(selectedVertices())
-    {
-      vector3_snap(m_face->m_move_planepts[0], snap);
-      vector3_snap(m_face->m_move_planepts[1], snap);
-      vector3_snap(m_face->m_move_planepts[2], snap);
-      m_face->assign_planepts(m_face->m_move_planepts);
-      planepts_assign(m_face->m_move_planeptsTransformed, m_face->m_move_planepts);
-      m_face->freezeTransform();
-    }
-    if(selectedEdges())
-    {
-      vector3_snap(m_face->m_move_planepts[0], snap);
-      vector3_snap(m_face->m_move_planepts[1], snap);
-      vector3_snap(m_face->m_move_planepts[2], snap);
-      m_face->assign_planepts(m_face->m_move_planepts);
-      planepts_assign(m_face->m_move_planeptsTransformed, m_face->m_move_planepts);
-      m_face->freezeTransform();
-    }
-  }
-  void update_move_planepts_vertex(std::size_t index)
-  {
-    m_face->update_move_planepts_vertex(index, m_face->m_move_planepts);
-  }
-  void update_move_planepts_vertex2(std::size_t index, std::size_t other)
-  {
-    const std::size_t numpoints = m_face->getWinding().numpoints;
-    ASSERT_MESSAGE(index < numpoints, "select_vertex: invalid index");
-
-    const std::size_t opposite = Winding_Opposite(m_face->getWinding(), index, other);
-
-    if(triangle_reversed(index, other, opposite))
-    {
-      std::swap(index, other);
-    }
-
-    ASSERT_MESSAGE(
-      triangles_same_winding(
-        m_face->getWinding()[opposite].vertex,
-        m_face->getWinding()[index].vertex,
-        m_face->getWinding()[other].vertex,
-        m_face->getWinding()[0].vertex,
-        m_face->getWinding()[1].vertex,
-        m_face->getWinding()[2].vertex
-      ),
-      "update_move_planepts_vertex2: error"
-    );
-
-    m_face->m_move_planepts[0] = m_face->getWinding()[opposite].vertex;
-    m_face->m_move_planepts[1] = m_face->getWinding()[index].vertex;
-    m_face->m_move_planepts[2] = m_face->getWinding()[other].vertex;
-    planepts_quantise(m_face->m_move_planepts, GRID_MIN); // winding points are very inaccurate
-  }
-  void update_selection_vertex()
-  {
-    if(m_vertexSelection.size() == 0)
-    {
-      m_selectableVertices.setSelected(false);
-    }
-    else
-    {
-      m_selectableVertices.setSelected(true);
-
-      if(m_vertexSelection.size() == 1)
-      {
-        std::size_t index = Winding_FindAdjacent(getFace().getWinding(), *m_vertexSelection.begin());
-
-        if(index != c_brush_maxFaces)
-        {
-          update_move_planepts_vertex(index);
-        }
-      }
-      else if(m_vertexSelection.size() == 2)
-      {
-        std::size_t index = Winding_FindAdjacent(getFace().getWinding(), *m_vertexSelection.begin());
-        std::size_t other = Winding_FindAdjacent(getFace().getWinding(), *(++m_vertexSelection.begin()));
-
-        if(index != c_brush_maxFaces
-          && other != c_brush_maxFaces)
-        {
-          update_move_planepts_vertex2(index, other);
-        }
-      }
-    }
-  }
-  void select_vertex(std::size_t index, bool select)
-  {
-    if(select)
-    {
-      VertexSelection_insert(m_vertexSelection, getFace().getWinding()[index].adjacent);
-    }
-    else
-    {
-      VertexSelection_erase(m_vertexSelection, getFace().getWinding()[index].adjacent);
-    }
-
-    SceneChangeNotify();
-    update_selection_vertex();
-  }
-
-  bool selected_vertex(std::size_t index) const
-  {
-    return VertexSelection_find(m_vertexSelection, getFace().getWinding()[index].adjacent) != m_vertexSelection.end();
-  }
-
-  void update_move_planepts_edge(std::size_t index)
-  {
-    std::size_t numpoints = m_face->getWinding().numpoints;
-    ASSERT_MESSAGE(index < numpoints, "select_edge: invalid index");
-
-    std::size_t adjacent = Winding_next(m_face->getWinding(), index);
-    std::size_t opposite = Winding_Opposite(m_face->getWinding(), index);
-    m_face->m_move_planepts[0] = m_face->getWinding()[index].vertex;
-    m_face->m_move_planepts[1] = m_face->getWinding()[adjacent].vertex;
-    m_face->m_move_planepts[2] = m_face->getWinding()[opposite].vertex;
-    planepts_quantise(m_face->m_move_planepts, GRID_MIN); // winding points are very inaccurate
-  }
-  void update_selection_edge()
-  {
-    if(m_edgeSelection.size() == 0)
-    {
-      m_selectableEdges.setSelected(false);
-    }
-    else
-    {
-      m_selectableEdges.setSelected(true);
-
-      if(m_edgeSelection.size() == 1)
-      {
-        std::size_t index = Winding_FindAdjacent(getFace().getWinding(), *m_edgeSelection.begin());
-
-        if(index != c_brush_maxFaces)
-        {
-          update_move_planepts_edge(index);
-        }
-      }
-    }
-  }
-  void select_edge(std::size_t index, bool select)
-  {
-    if(select)
-    {
-      VertexSelection_insert(m_edgeSelection, getFace().getWinding()[index].adjacent);
-    }
-    else
-    {
-      VertexSelection_erase(m_edgeSelection, getFace().getWinding()[index].adjacent);
-    }
-
-    SceneChangeNotify();
-    update_selection_edge();
-  }
-
-  bool selected_edge(std::size_t index) const
-  {
-    return VertexSelection_find(m_edgeSelection, getFace().getWinding()[index].adjacent) != m_edgeSelection.end();
-  }
-
-  const Vector3& centroid() const
-  {
-    return m_face->centroid();
-  }
-
-  void connectivityChanged()
-  {
-    // This occurs when a face is added or removed.
-    // The current vertex and edge selections no longer valid and must be cleared.
-    m_vertexSelection.clear();
-    m_selectableVertices.setSelected(false);
-    m_edgeSelection.clear();
-    m_selectableEdges.setSelected(false);
-  }
-};
-
-class BrushClipPlane : public OpenGLRenderable
-{
-  Plane3 m_plane;
-  Winding m_winding;
-  static Shader* m_state;
-public:
-  static void constructStatic()
-  {
-    m_state = GlobalShaderCache().capture("$CLIPPER_OVERLAY");
-  }
-  static void destroyStatic()
-  {
-    GlobalShaderCache().release("$CLIPPER_OVERLAY");
-  }
-
-  void setPlane(const Brush& brush, const Plane3& plane)
-  {
-    m_plane = plane;
-    if(plane3_valid(m_plane))
-    {
-      brush.windingForClipPlane(m_winding, m_plane);
-    }
-    else
-    {
-      m_winding.resize(0);
-    }
-  }
-
-  void render(RenderStateFlags state) const
-  {
-    if((state & RENDER_FILL) != 0)
-    {
-      Winding_Draw(m_winding, m_plane.normal(), state);
-    }
-    else
-    {
-      Winding_DrawWireframe(m_winding);
-    }
-  }
-
-  void render(Renderer& renderer, const VolumeTest& volume, const Matrix4& localToWorld) const
-  {
-    renderer.SetState(m_state, Renderer::eWireframeOnly);
-    renderer.SetState(m_state, Renderer::eFullMaterials);
-    renderer.addRenderable(*this, localToWorld);
-  }
-};
-
-inline void Face_addLight(const FaceInstance& face, const Matrix4& localToWorld, const RendererLight& light)
-{
-  const Plane3& facePlane = face.getFace().plane3();
-  const Vector3& origin = light.aabb().origin;
-  Plane3 tmp(plane3_transformed(Plane3(facePlane.normal(), -facePlane.dist()), localToWorld));
-  if(!plane3_test_point(tmp, origin)
-    || !plane3_test_point(tmp, vector3_added(origin, light.offset())))
-  {
-    face.m_lights.addLight(light);
-  }
-}
-
-
-
-typedef std::vector<FaceInstance> FaceInstances;
-
-class EdgeInstance : public Selectable
-{
-  FaceInstances& m_faceInstances;
-  SelectableEdge* m_edge;
-
-  void select_edge(bool select)
-  {
-    FaceVertexId faceVertex = m_edge->m_faceVertex;
-    m_faceInstances[faceVertex.getFace()].select_edge(faceVertex.getVertex(), select);
-    faceVertex = next_edge(m_edge->m_faces, faceVertex);
-    m_faceInstances[faceVertex.getFace()].select_edge(faceVertex.getVertex(), select);
-  }
-  bool selected_edge() const
-  {
-    FaceVertexId faceVertex = m_edge->m_faceVertex;
-    if(!m_faceInstances[faceVertex.getFace()].selected_edge(faceVertex.getVertex()))
-    {
-      return false;
-    }
-    faceVertex = next_edge(m_edge->m_faces, faceVertex);
-    if(!m_faceInstances[faceVertex.getFace()].selected_edge(faceVertex.getVertex()))
-    {
-      return false;
-    }
-
-    return true;
-  }
-
-public:
-  EdgeInstance(FaceInstances& faceInstances, SelectableEdge& edge)
-    : m_faceInstances(faceInstances), m_edge(&edge)
-  {
-  }
-  EdgeInstance& operator=(const EdgeInstance& other)
-  {
-    m_edge = other.m_edge;
-    return *this;
-  }
-
-  void setSelected(bool select)
-  {
-    select_edge(select);
-  }
-  bool isSelected() const
-  {
-    return selected_edge();
-  }
-
-
-  void testSelect(Selector& selector, SelectionTest& test)
-  {
-    SelectionIntersection best;
-    m_edge->testSelect(test, best);
-    if(best.valid())
-    {
-      Selector_add(selector, *this, best);
-    }
-  }
-};
-
-class VertexInstance : public Selectable
-{
-  FaceInstances& m_faceInstances;
-  SelectableVertex* m_vertex;
-
-  void select_vertex(bool select)
-  {
-    FaceVertexId faceVertex = m_vertex->m_faceVertex;
-    do
-    {
-      m_faceInstances[faceVertex.getFace()].select_vertex(faceVertex.getVertex(), select);
-      faceVertex = next_vertex(m_vertex->m_faces, faceVertex);
-    }
-    while(faceVertex.getFace() != m_vertex->m_faceVertex.getFace());
-  }
-  bool selected_vertex() const
-  {
-    FaceVertexId faceVertex = m_vertex->m_faceVertex;
-    do
-    {
-      if(!m_faceInstances[faceVertex.getFace()].selected_vertex(faceVertex.getVertex()))
-      {
-        return false;
-      }
-      faceVertex = next_vertex(m_vertex->m_faces, faceVertex);
-    }
-    while(faceVertex.getFace() != m_vertex->m_faceVertex.getFace());
-    return true;
-  }
-
-public:
-  VertexInstance(FaceInstances& faceInstances, SelectableVertex& vertex)
-    : m_faceInstances(faceInstances), m_vertex(&vertex)
-  {
-  }
-  VertexInstance& operator=(const VertexInstance& other)
-  {
-    m_vertex = other.m_vertex;
-    return *this;
-  }
-
-  void setSelected(bool select)
-  {
-    select_vertex(select);
-  }
-  bool isSelected() const
-  {
-    return selected_vertex();
-  }
-
-  void testSelect(Selector& selector, SelectionTest& test)
-  {
-    SelectionIntersection best;
-    m_vertex->testSelect(test, best);
-    if(best.valid())
-    {
-      Selector_add(selector, *this, best);
-    }
-  }
-};
-
-class BrushInstanceVisitor
-{
-public:
-  virtual void visit(FaceInstance& face) const = 0;
-};
-
-class BrushInstance :
-public BrushObserver,
-public scene::Instance,
-public Selectable,
-public Renderable,
-public SelectionTestable,
-public ComponentSelectionTestable,
-public ComponentEditable,
-public ComponentSnappable,
-public PlaneSelectable,
-public LightCullable
-{
-  class TypeCasts
-  {
-    InstanceTypeCastTable m_casts;
-  public:
-    TypeCasts()
-    {
-      InstanceStaticCast<BrushInstance, Selectable>::install(m_casts);
-      InstanceContainedCast<BrushInstance, Bounded>::install(m_casts);
-      InstanceContainedCast<BrushInstance, Cullable>::install(m_casts);
-      InstanceStaticCast<BrushInstance, Renderable>::install(m_casts);
-      InstanceStaticCast<BrushInstance, SelectionTestable>::install(m_casts);
-      InstanceStaticCast<BrushInstance, ComponentSelectionTestable>::install(m_casts);
-      InstanceStaticCast<BrushInstance, ComponentEditable>::install(m_casts);
-      InstanceStaticCast<BrushInstance, ComponentSnappable>::install(m_casts);
-      InstanceStaticCast<BrushInstance, PlaneSelectable>::install(m_casts);
-      InstanceIdentityCast<BrushInstance>::install(m_casts);
-      InstanceContainedCast<BrushInstance, Transformable>::install(m_casts);
-    }
-    InstanceTypeCastTable& get()
-    {
-      return m_casts;
-    }
-  };
-
-
-  Brush& m_brush;
-
-  FaceInstances m_faceInstances;
-
-  typedef std::vector<EdgeInstance> EdgeInstances;
-  EdgeInstances m_edgeInstances;
-  typedef std::vector<VertexInstance> VertexInstances;
-  VertexInstances m_vertexInstances;
-
-  ObservedSelectable m_selectable;
-
-  mutable RenderableWireframe m_render_wireframe;
-  mutable RenderablePointVector m_render_selected;
-  mutable AABB m_aabb_component;
-  mutable Array<PointVertex> m_faceCentroidPointsCulled;
-  RenderablePointArray m_render_faces_wireframe;
-  mutable bool m_viewChanged; // requires re-evaluation of view-dependent cached data
-
-  BrushClipPlane m_clipPlane;
-
-  static Shader* m_state_selpoint;
-
-  const LightList* m_lightList;
-
-  TransformModifier m_transform;
-
-  BrushInstance(const BrushInstance& other); // NOT COPYABLE
-  BrushInstance& operator=(const BrushInstance& other); // NOT ASSIGNABLE
-public:
-  static Counter* m_counter;
-
-  typedef LazyStatic<TypeCasts> StaticTypeCasts;
-
-  void lightsChanged()
-  {
-    m_lightList->lightsChanged();
-  }
-  typedef MemberCaller<BrushInstance, &BrushInstance::lightsChanged> LightsChangedCaller;
-
-  STRING_CONSTANT(Name, "BrushInstance");
-
-  BrushInstance(const scene::Path& path, scene::Instance* parent, Brush& brush) :
-    Instance(path, parent, this, StaticTypeCasts::instance().get()),
-    m_brush(brush),
-    m_selectable(SelectedChangedCaller(*this)),
-    m_render_selected(GL_POINTS),
-    m_render_faces_wireframe(m_faceCentroidPointsCulled, GL_POINTS),
-    m_viewChanged(false),
-    m_transform(Brush::TransformChangedCaller(m_brush), ApplyTransformCaller(*this))
-  {
-    m_brush.instanceAttach(Instance::path());
-    m_brush.attach(*this);
-    m_counter->increment();
-
-    m_lightList = &GlobalShaderCache().attach(*this);
-    m_brush.m_lightsChanged = LightsChangedCaller(*this); ///\todo Make this work with instancing.
-
-    Instance::setTransformChangedCallback(LightsChangedCaller(*this));
-  }
-  ~BrushInstance()
-  {
-    Instance::setTransformChangedCallback(Callback());
-
-    m_brush.m_lightsChanged = Callback();
-    GlobalShaderCache().detach(*this);
-
-    m_counter->decrement();
-    m_brush.detach(*this);
-    m_brush.instanceDetach(Instance::path());
-  }
-
-  Brush& getBrush()
-  {
-    return m_brush;
-  }
-  const Brush& getBrush() const
-  {
-    return m_brush;
-  }
-
-  Bounded& get(NullType<Bounded>)
-  {
-    return m_brush;
-  }
-  Cullable& get(NullType<Cullable>)
-  {
-    return m_brush;
-  }
-  Transformable& get(NullType<Transformable>)
-  {
-    return m_transform;
-  }
-
-  void selectedChanged(const Selectable& selectable)
-  {
-    GlobalSelectionSystem().getObserver(SelectionSystem::ePrimitive)(selectable);
-    GlobalSelectionSystem().onSelectedChanged(*this, selectable);
-
-    Instance::selectedChanged();
-  }
-  typedef MemberCaller1<BrushInstance, const Selectable&, &BrushInstance::selectedChanged> SelectedChangedCaller;
-
-  void selectedChangedComponent(const Selectable& selectable)
-  {
-    GlobalSelectionSystem().getObserver(SelectionSystem::eComponent)(selectable);
-    GlobalSelectionSystem().onComponentSelection(*this, selectable);
-  }
-  typedef MemberCaller1<BrushInstance, const Selectable&, &BrushInstance::selectedChangedComponent> SelectedChangedComponentCaller;
-
-  const BrushInstanceVisitor& forEachFaceInstance(const BrushInstanceVisitor& visitor)
-  {
-    for(FaceInstances::iterator i = m_faceInstances.begin(); i != m_faceInstances.end(); ++i)
-    {
-      visitor.visit(*i);
-    }
-    return visitor;
-  }
-
-  static void constructStatic()
-  {
-    m_state_selpoint = GlobalShaderCache().capture("$SELPOINT");
-  }
-  static void destroyStatic()
-  {
-    GlobalShaderCache().release("$SELPOINT");
-  }
-
-  void clear()
-  {
-    m_faceInstances.clear();
-  }
-  void reserve(std::size_t size)
-  {
-    m_faceInstances.reserve(size);
-  }
-
-  void push_back(Face& face)
-  {
-    m_faceInstances.push_back(FaceInstance(face, SelectedChangedComponentCaller(*this)));
-  }
-  void pop_back()
-  {
-    ASSERT_MESSAGE(!m_faceInstances.empty(), "erasing invalid element");
-    m_faceInstances.pop_back();
-  }
-  void erase(std::size_t index)
-  {
-    ASSERT_MESSAGE(index < m_faceInstances.size(), "erasing invalid element");
-    m_faceInstances.erase(m_faceInstances.begin() + index);
-  }
-  void connectivityChanged()
-  {
-    for(FaceInstances::iterator i = m_faceInstances.begin(); i != m_faceInstances.end(); ++i)
-    {
-      (*i).connectivityChanged();
-    }
-  }
-
-  void edge_clear()
-  {
-    m_edgeInstances.clear();
-  }
-  void edge_push_back(SelectableEdge& edge)
-  {
-    m_edgeInstances.push_back(EdgeInstance(m_faceInstances, edge));
-  }
-
-  void vertex_clear()
-  {
-    m_vertexInstances.clear();
-  }
-  void vertex_push_back(SelectableVertex& vertex)
-  {
-    m_vertexInstances.push_back(VertexInstance(m_faceInstances, vertex));
-  }
-
-  void DEBUG_verify() const
-  {
-    ASSERT_MESSAGE(m_faceInstances.size() == m_brush.DEBUG_size(), "FATAL: mismatch");
-  }
-
-  bool isSelected() const
-  {
-    return m_selectable.isSelected();
-  }
-  void setSelected(bool select)
-  {
-    m_selectable.setSelected(select);
-  }
-
-  void update_selected() const
-  {
-    m_render_selected.clear();
-    for(FaceInstances::const_iterator i = m_faceInstances.begin(); i != m_faceInstances.end(); ++i)
-    {
-      if((*i).getFace().contributes())
-      {
-        (*i).iterate_selected(m_render_selected);
-      }
-    }
-  }
-
-  void evaluateViewDependent(const VolumeTest& volume, const Matrix4& localToWorld) const
-  {
-    if(m_viewChanged)
-    {
-      m_viewChanged = false;
-
-      bool faces_visible[c_brush_maxFaces];
-      {
-        bool* j = faces_visible;
-        for(FaceInstances::const_iterator i = m_faceInstances.begin(); i != m_faceInstances.end(); ++i, ++j)
-        {
-          *j = (*i).intersectVolume(volume, localToWorld);
-        }
-      }
-
-      m_brush.update_wireframe(m_render_wireframe, faces_visible);
-      m_brush.update_faces_wireframe(m_faceCentroidPointsCulled, faces_visible);
-    }
-  }
-
-  void renderComponentsSelected(Renderer& renderer, const VolumeTest& volume, const Matrix4& localToWorld) const
-  {
-    m_brush.evaluateBRep();
-
-    update_selected();
-    if(!m_render_selected.empty())
-    {
-      renderer.Highlight(Renderer::ePrimitive, false);
-      renderer.SetState(m_state_selpoint, Renderer::eWireframeOnly);
-      renderer.SetState(m_state_selpoint, Renderer::eFullMaterials);
-      renderer.addRenderable(m_render_selected, localToWorld);
-    }
-  }
-
-  void renderComponents(Renderer& renderer, const VolumeTest& volume) const
-  {
-    m_brush.evaluateBRep();
-
-    const Matrix4& localToWorld = Instance::localToWorld();
-
-    renderer.SetState(m_brush.m_state_point, Renderer::eWireframeOnly);
-    renderer.SetState(m_brush.m_state_point, Renderer::eFullMaterials);
-
-    if(volume.fill() && GlobalSelectionSystem().ComponentMode() == SelectionSystem::eFace)
-    {
-      evaluateViewDependent(volume, localToWorld);
-      renderer.addRenderable(m_render_faces_wireframe, localToWorld);
-    }
-    else
-    {
-      m_brush.renderComponents(GlobalSelectionSystem().ComponentMode(), renderer, volume, localToWorld);
-    }
-  }
-
-  void renderClipPlane(Renderer& renderer, const VolumeTest& volume) const
-  {
-    if(GlobalSelectionSystem().ManipulatorMode() == SelectionSystem::eClip && isSelected())
-    {
-      m_clipPlane.render(renderer, volume, localToWorld());
-    }
-  }
-
-  void renderCommon(Renderer& renderer, const VolumeTest& volume) const
-  {
-    bool componentMode = GlobalSelectionSystem().Mode() == SelectionSystem::eComponent;
-    
-    if(componentMode && isSelected())
-    {
-      renderComponents(renderer, volume);
-    }
-    
-    if(parentSelected())
-    {
-      if(!componentMode)
-      {
-        renderer.Highlight(Renderer::eFace);
-      }
-      renderer.Highlight(Renderer::ePrimitive);
-    }
-  }
-
-  void renderSolid(Renderer& renderer, const VolumeTest& volume, const Matrix4& localToWorld) const
-  {
-    //renderCommon(renderer, volume);
-
-    m_lightList->evaluateLights();
-
-    for(FaceInstances::const_iterator i = m_faceInstances.begin(); i != m_faceInstances.end(); ++i)
-    {
-      renderer.setLights((*i).m_lights);
-      (*i).render(renderer, volume, localToWorld);
-    }
-
-    renderComponentsSelected(renderer, volume, localToWorld);
-  }
-
-  void renderWireframe(Renderer& renderer, const VolumeTest& volume, const Matrix4& localToWorld) const
-  {
-    //renderCommon(renderer, volume);
-
-    evaluateViewDependent(volume, localToWorld);
-
-    if(m_render_wireframe.m_size != 0)
-    {
-      renderer.addRenderable(m_render_wireframe, localToWorld);
-    }
-
-    renderComponentsSelected(renderer, volume, localToWorld);
-  }
-
-  void renderSolid(Renderer& renderer, const VolumeTest& volume) const
-  {
-    m_brush.evaluateBRep();
-
-    renderClipPlane(renderer, volume);
-
-    renderSolid(renderer, volume, localToWorld());
-  }
-
-  void renderWireframe(Renderer& renderer, const VolumeTest& volume) const
-  {
-    m_brush.evaluateBRep();
-
-    renderClipPlane(renderer, volume);
-
-    renderWireframe(renderer, volume, localToWorld());
-  }
-
-  void viewChanged() const
-  {
-    m_viewChanged = true;
-  }
-
-  void testSelect(Selector& selector, SelectionTest& test)
-  {
-    test.BeginMesh(localToWorld());
-
-    SelectionIntersection best;
-    for(FaceInstances::iterator i = m_faceInstances.begin(); i != m_faceInstances.end(); ++i)
-    {
-      (*i).testSelect(test, best);
-    }
-    if(best.valid())
-    {
-      selector.addIntersection(best);
-    }
-  }
-
-  bool isSelectedComponents() const
-  {
-    for(FaceInstances::const_iterator i = m_faceInstances.begin(); i != m_faceInstances.end(); ++i)
-    {
-      if((*i).selectedComponents())
-      {
-        return true;
-      }
-    }
-    return false;
-  }
-  void setSelectedComponents(bool select, SelectionSystem::EComponentMode mode)
-  {
-    for(FaceInstances::iterator i = m_faceInstances.begin(); i != m_faceInstances.end(); ++i)
-    {
-      (*i).setSelected(mode, select);
-    }
-  }
-  void testSelectComponents(Selector& selector, SelectionTest& test, SelectionSystem::EComponentMode mode)
-  {
-    test.BeginMesh(localToWorld());
-
-    switch(mode)
-    {
-    case SelectionSystem::eVertex:
-      {
-        for(VertexInstances::iterator i = m_vertexInstances.begin(); i != m_vertexInstances.end(); ++i)
-        {
-          (*i).testSelect(selector, test);
-        }
-      }
-      break;
-    case SelectionSystem::eEdge:
-      {
-        for(EdgeInstances::iterator i = m_edgeInstances.begin(); i != m_edgeInstances.end(); ++i)
-        {
-          (*i).testSelect(selector, test);
-        }
-      }
-      break;
-    case SelectionSystem::eFace:
-      {
-        if(test.getVolume().fill())
-        {
-          for(FaceInstances::iterator i = m_faceInstances.begin(); i != m_faceInstances.end(); ++i)
-          {
-            (*i).testSelect(selector, test);
-          }
-        }
-        else
-        {
-          for(FaceInstances::iterator i = m_faceInstances.begin(); i != m_faceInstances.end(); ++i)
-          {
-            (*i).testSelect_centroid(selector, test);
-          }
-        }
-      }
-      break;
-    default:
-      break;
-    }
-  }
-
-  void selectPlanes(Selector& selector, SelectionTest& test, const PlaneCallback& selectedPlaneCallback)
-  {
-    test.BeginMesh(localToWorld());
-
-    PlanePointer brushPlanes[c_brush_maxFaces];
-    PlanesIterator j = brushPlanes;
-
-    for(Brush::const_iterator i = m_brush.begin(); i != m_brush.end(); ++i)
-    {
-      *j++ = &(*i)->plane3();
-    }
-
-    for(FaceInstances::iterator i = m_faceInstances.begin(); i != m_faceInstances.end(); ++i)
-    {
-      (*i).selectPlane(selector, Line(test.getNear(), test.getFar()), brushPlanes, j, selectedPlaneCallback);
-    }
-  }
-  void selectReversedPlanes(Selector& selector, const SelectedPlanes& selectedPlanes)
-  {
-    for(FaceInstances::iterator i = m_faceInstances.begin(); i != m_faceInstances.end(); ++i)
-    {
-      (*i).selectReversedPlane(selector, selectedPlanes);
-    }
-  }
-
-
-  void transformComponents(const Matrix4& matrix)
-  {
-    for(FaceInstances::iterator i = m_faceInstances.begin(); i != m_faceInstances.end(); ++i)
-    {
-      (*i).transformComponents(matrix);
-    }
-  }
-  const AABB& getSelectedComponentsBounds() const
-  {
-    m_aabb_component = AABB();
-
-    for(FaceInstances::const_iterator i = m_faceInstances.begin(); i != m_faceInstances.end(); ++i)
-    {
-      (*i).iterate_selected(m_aabb_component);
-    }
-
-    return m_aabb_component;
-  }
-
-  void snapComponents(float snap)
-  {
-    for(FaceInstances::iterator i = m_faceInstances.begin(); i != m_faceInstances.end(); ++i)
-    {
-      (*i).snapComponents(snap);
-    }
-  }
-  void evaluateTransform()
-  {
-    Matrix4 matrix(m_transform.calculateTransform());
-    //globalOutputStream() << "matrix: " << matrix << "\n";
-
-    if(m_transform.getType() == TRANSFORM_PRIMITIVE)
-    {
-      m_brush.transform(matrix);
-    }
-    else
-    {
-      transformComponents(matrix);
-    }
-  }
-  void applyTransform()
-  {
-    m_brush.revertTransform();
-    evaluateTransform();
-    m_brush.freezeTransform();
-  }
-  typedef MemberCaller<BrushInstance, &BrushInstance::applyTransform> ApplyTransformCaller;
-
-  void setClipPlane(const Plane3& plane)
-  {
-    m_clipPlane.setPlane(m_brush, plane);
-  }
-
-  bool testLight(const RendererLight& light) const
-  {
-    return light.testAABB(worldAABB());
-  }
-  void insertLight(const RendererLight& light)
-  {
-    const Matrix4& localToWorld = Instance::localToWorld();
-    for(FaceInstances::const_iterator i = m_faceInstances.begin(); i != m_faceInstances.end(); ++i)
-    {
-      Face_addLight(*i, localToWorld, light);
-    }
-  }
-  void clearLights()
-  {
-    for(FaceInstances::const_iterator i = m_faceInstances.begin(); i != m_faceInstances.end(); ++i)
-    {
-      (*i).m_lights.clear();
-    }
-  }
-};
-
-inline BrushInstance* Instance_getBrush(scene::Instance& instance)
-{
-  return InstanceTypeCast<BrushInstance>::cast(instance);
-}
-
-
-template<typename Functor>
-class BrushSelectedVisitor : public SelectionSystem::Visitor
-{
-  const Functor& m_functor;
-public:
-  BrushSelectedVisitor(const Functor& functor) : m_functor(functor)
-  {
-  }
-  void visit(scene::Instance& instance) const
-  {
-    BrushInstance* brush = Instance_getBrush(instance);
-    if(brush != 0)
-    {
-      m_functor(*brush);
-    }
-  }
-};
-
-template<typename Functor>
-inline const Functor& Scene_forEachSelectedBrush(const Functor& functor)
-{
-  GlobalSelectionSystem().foreachSelected(BrushSelectedVisitor<Functor>(functor));
-  return functor;
-}
-
-template<typename Functor>
-class BrushVisibleSelectedVisitor : public SelectionSystem::Visitor
-{
-  const Functor& m_functor;
-public:
-  BrushVisibleSelectedVisitor(const Functor& functor) : m_functor(functor)
-  {
-  }
-  void visit(scene::Instance& instance) const
-  {
-    BrushInstance* brush = Instance_getBrush(instance);
-    if(brush != 0
-      && instance.path().top().get().visible())
-    {
-      m_functor(*brush);
-    }
-  }
-};
-
-template<typename Functor>
-inline const Functor& Scene_forEachVisibleSelectedBrush(const Functor& functor)
-{
-  GlobalSelectionSystem().foreachSelected(BrushVisibleSelectedVisitor<Functor>(functor));
-  return functor;
-}
-
-class BrushForEachFace
-{
-  const BrushInstanceVisitor& m_visitor;
-public:
-  BrushForEachFace(const BrushInstanceVisitor& visitor) : m_visitor(visitor)
-  {
-  }
-  void operator()(BrushInstance& brush) const
-  {
-    brush.forEachFaceInstance(m_visitor);
-  }
-};
-
-template<class Functor>
-class FaceInstanceVisitFace : public BrushInstanceVisitor
-{
-  const Functor& functor;
-public:
-  FaceInstanceVisitFace(const Functor& functor)
-    : functor(functor)
-  {
-  }
-  void visit(FaceInstance& face) const
-  {
-    functor(face.getFace());
-  }
-};
-
-template<typename Functor>
-inline const Functor& Brush_forEachFace(BrushInstance& brush, const Functor& functor)
-{
-  brush.forEachFaceInstance(FaceInstanceVisitFace<Functor>(functor));
-  return functor;
-}
-
-template<class Functor>
-class FaceVisitAll : public BrushVisitor
-{
-  const Functor& functor;
-public:
-  FaceVisitAll(const Functor& functor)
-    : functor(functor)
-  {
-  }
-  void visit(Face& face) const
-  {
-    functor(face);
-  }
-};
-
-template<typename Functor>
-inline const Functor& Brush_forEachFace(const Brush& brush, const Functor& functor)
-{
-  brush.forEachFace(FaceVisitAll<Functor>(functor));
-  return functor;
-}
-
-template<typename Functor>
-inline const Functor& Brush_forEachFace(Brush& brush, const Functor& functor)
-{
-  brush.forEachFace(FaceVisitAll<Functor>(functor));
-  return functor;
-}
-
-template<class Functor>
-class FaceInstanceVisitAll : public BrushInstanceVisitor
-{
-  const Functor& functor;
-public:
-  FaceInstanceVisitAll(const Functor& functor)
-    : functor(functor)
-  {
-  }
-  void visit(FaceInstance& face) const
-  {
-    functor(face);
-  }
-};
-
-template<typename Functor>
-inline const Functor& Brush_ForEachFaceInstance(BrushInstance& brush, const Functor& functor)
-{
-  brush.forEachFaceInstance(FaceInstanceVisitAll<Functor>(functor));
-  return functor;
-}
-
-template<typename Functor>
-inline const Functor& Scene_forEachBrush(scene::Graph& graph, const Functor& functor)
-{
-  graph.traverse(InstanceWalker< InstanceApply<BrushInstance, Functor> >(functor));
-  return functor;
-}
-
-template<typename Type, typename Functor>
-class InstanceIfVisible : public Functor
-{
-public:
-  InstanceIfVisible(const Functor& functor) : Functor(functor)
-  {
-  }
-  void operator()(scene::Instance& instance)
-  {
-    if(instance.path().top().get().visible())
-    {
-      Functor::operator()(instance);
-    }
-  }
-};
-
-template<typename Functor>
-class BrushVisibleWalker : public scene::Graph::Walker
-{
-  const Functor& m_functor;
-public:
-  BrushVisibleWalker(const Functor& functor) : m_functor(functor)
-  {
-  }
-  bool pre(const scene::Path& path, scene::Instance& instance) const
-  {
-    if(path.top().get().visible())
-    {
-      BrushInstance* brush = Instance_getBrush(instance);
-      if(brush != 0)
-      {
-        m_functor(*brush);
-      }
-    }
-    return true;
-  }
-};
-
-template<typename Functor>
-inline const Functor& Scene_forEachVisibleBrush(scene::Graph& graph, const Functor& functor)
-{
-  graph.traverse(BrushVisibleWalker<Functor>(functor));
-  return functor;
-}
-
-template<typename Functor>
-inline const Functor& Scene_ForEachBrush_ForEachFace(scene::Graph& graph, const Functor& functor)
-{
-  Scene_forEachBrush(graph, BrushForEachFace(FaceInstanceVisitFace<Functor>(functor)));
-  return functor;
-}
-
-// d1223m
-template<typename Functor>
-inline const Functor& Scene_ForEachBrush_ForEachFaceInstance(scene::Graph& graph, const Functor& functor)
-{
-  Scene_forEachBrush(graph, BrushForEachFace(FaceInstanceVisitAll<Functor>(functor)));
-  return functor;
-}
-
-template<typename Functor>
-inline const Functor& Scene_ForEachSelectedBrush_ForEachFace(scene::Graph& graph, const Functor& functor)
-{
-  Scene_forEachSelectedBrush(BrushForEachFace(FaceInstanceVisitFace<Functor>(functor)));
-  return functor;
-}
-
-template<typename Functor>
-inline const Functor& Scene_ForEachSelectedBrush_ForEachFaceInstance(scene::Graph& graph, const Functor& functor)
-{
-  Scene_forEachSelectedBrush(BrushForEachFace(FaceInstanceVisitAll<Functor>(functor)));
-  return functor;
-}
-
-template<typename Functor>
-class FaceVisitorWrapper
-{
-  const Functor& functor;
-public:
-  FaceVisitorWrapper(const Functor& functor) : functor(functor)
-  {
-  }
-
-  void operator()(FaceInstance& faceInstance) const
-  {
-    functor(faceInstance.getFace());
-  }
-};
-
-template<typename Functor>
-inline const Functor& Scene_ForEachSelectedBrushFace(scene::Graph& graph, const Functor& functor)
-{
-  g_SelectedFaceInstances.foreach(FaceVisitorWrapper<Functor>(functor));
-  return functor;
-}
-
-
-#endif
+// brush.h
+
+// some usefull flags to control the behaviour of Brush_Build
+extern bool g_bBuildWindingsNoTexBuild;
+
+void           Brush_AddToList (brush_t *b, brush_t *lst);
+void           Brush_Build(brush_t *b, bool bSnap = true, bool bMarkMap = true, bool bConvert = false, bool bFilterTest = true);
+void    Brush_SetBuildWindingsNoTexBuild(bool bBuild);
+void           Brush_BuildWindings( brush_t *b, bool bSnap = true );
+brush_t*       Brush_Clone (brush_t *b);
+brush_t*       Brush_FullClone(brush_t *b);
+brush_t*       Brush_Create (vec3_t mins, vec3_t maxs, texdef_t *texdef);
+void    Brush_Resize(brush_t *b, vec3_t vMin, vec3_t vMax);
+void    Brush_FaceDraw(face_t *face, int nGLState);
+void           Brush_Draw( brush_t *b );
+void           Brush_DrawXY(brush_t *b, int nViewType);
+// set bRemoveNode to false to avoid trying to delete the item in group view tree control
+void           Brush_Free (brush_t *b, bool bRemoveNode = true);
+int                    Brush_MemorySize(brush_t *b);
+void           Brush_MakeSided (int sides);
+void           Brush_MakeSidedCone (int sides);
+void           Brush_Move (brush_t *b, const vec3_t move, bool bSnap = true);
+int            Brush_MoveVertex(brush_t *b, vec3_t vertex, vec3_t delta, vec3_t end, bool bSnap = true);
+void           Brush_ResetFaceOriginals(brush_t *b);
+face_t*                Brush_Ray (vec3_t origin, vec3_t dir, brush_t *b, float *dist, int nFlags = 0);
+void           Brush_RemoveFromList (brush_t *b);
+// bCaulk means the faces created during the operation will be caulked, this is used in conjunction with g_PrefsDlg.m_bClipCaulk
+void           Brush_SplitBrushByFace (brush_t *in, face_t *f, brush_t **front, brush_t **back, boolean bCaulk = false);
+void           Brush_SelectFaceForDragging (brush_t *b, face_t *f, qboolean shear);
+void           Brush_SetTexture (brush_t *b, texdef_t *texdef, brushprimit_texdef_t *brushprimit_texdef, bool bFitScale = false, IPluginTexdef* pPlugTexdef= (IPluginTexdef*)NULL);
+void           Brush_SideSelect (brush_t *b, vec3_t origin, vec3_t dir, qboolean shear);
+void           Brush_SnapToGrid(brush_t *pb);
+void           Brush_Rotate(brush_t *b, vec3_t vAngle, vec3_t vOrigin, bool bBuild = true);
+void           Brush_MakeSidedSphere(int sides);
+//void         Brush_Write (brush_t *b, FILE *f);
+//void         Brush_Write (brush_t *b, MemStream* pMemFile);
+void           Brush_RemoveEmptyFaces ( brush_t *b );
+winding_t*     Brush_MakeFaceWinding (brush_t *b, face_t *face);
+
+void Brush_RefreshShader(brush_t *b);
+
+int                    AddPlanept (float *f);
+float          SetShadeForPlane (plane_t *p);
+
+face_t* Face_Alloc( void );
+void           Face_Free( face_t *f );
+face_t* Face_Clone (face_t *f);
+void    Face_SetShader(face_t *face, const char *name);
+/*!
+faster version if you know the IShader already
+(instead of hash table lookup by name)
+*/
+void    Face_SetShader(face_t *face, IShader *shader);
+void    Face_MakePlane (face_t *f);
+void           Face_Draw( face_t *face );
+void           Face_TextureVectors (face_t *f, float STfromXYZ[2][4]);
+void           SetFaceTexdef (face_t *f, texdef_t *texdef, brushprimit_texdef_t *brushprimit_texdef, bool bFitScale = false, IPluginTexdef* pPlugTexdef = NULL );
+
+void Face_FitTexture( face_t * face, int nHeight, int nWidth );
+void Brush_FitTexture( brush_t *b, int nHeight, int nWidth );
+//void Brush_SetEpair(brush_t *b, const char *pKey, const char *pValue);
+//const char* Brush_GetKeyValue(brush_t *b, const char *pKey);
+brush_t *Brush_Alloc();
+const char* Brush_Name(brush_t *b);
+
+//eclass_t* HasModel(brush_t *b);
+void aabb_draw(const aabb_t *aabb, int mode);