/*
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.

GtkRadiant is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

GtkRadiant is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GtkRadiant; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

//
// Camera Window
//
// Leonardo Zide (leo@lokigames.com)
//

#include "stdafx.h"
#include <gtk/gtk.h>
#include <GL/gl.h>

extern void DrawPathLines();
extern void Select_ShiftTexture(int x, int y);
extern void Select_RotateTexture(int amt);
extern void DrawAlternatePoint(vec3_t v, float scale);
//extern void Select_ScaleTexture(int x, int y);

extern int g_nPatchClickedView;

brush_t* g_pSplitList = NULL;

// =============================================================================
// CamWnd class

CamWnd::CamWnd ()
  : GLWindow (TRUE), m_XORRectangle(m_pWidget)
{
  m_nNumTransBrushes = 0;
  memset(&m_Camera, 0, sizeof(camera_t));
  m_pSide_select = NULL;
  m_bClipMode = false;
  m_bFreeMove = false;
  Cam_Init();
}

CamWnd::~CamWnd ()
{
}

void CamWnd::OnCreate ()
{
  if (!MakeCurrent ())
    Error ("glMakeCurrent failed");

  gtk_glwidget_create_font (m_pWidget);

  // report OpenGL information
  Sys_Printf ("GL_VENDOR: %s\n", qglGetString (GL_VENDOR));
  Sys_Printf ("GL_RENDERER: %s\n", qglGetString (GL_RENDERER));
  Sys_Printf ("GL_VERSION: %s\n", qglGetString (GL_VERSION));
  Sys_Printf ("GL_EXTENSIONS: %s\n", qglGetString (GL_EXTENSIONS));

  // Set off texture compression supported
  g_qeglobals.bTextureCompressionSupported = 0;

  // finalize OpenGL init
  // NOTE
  // why is this here? well .. the Gtk objects get constructed when you enter gtk_main
  // and I wanted to have the extensions information in the editor startup console (avoid looking that up in the early console)
  // RIANT
  // I Split this up so as to add support for extension and user-friendly
  // compression format selection.
  // ADD new globals for your new format so as to minimise
  // calls to Sys_QGL_ExtensionSupported
  // NOTE TTimo: I don't really like this approach with globals. Frequent calls to Sys_QGL_ExtensionSupported don't sound like
  //   a problem to me. If there is some caching to be done, then I think it should be inside Sys_QGL_ExtensionSupported
  ///////////////////////////////////////////
  // Check for default OpenGL
  if (Sys_QGL_ExtensionSupported ("GL_ARB_texture_compression"))
  {
    g_qeglobals.bTextureCompressionSupported = 1;
    g_qeglobals.m_bOpenGLCompressionSupported = 1;
  }

  // INSERT PROPRIETARY EXTENSIONS HERE
  // Check for S3 extensions
  // create a bool global for extension supported
  if (Sys_QGL_ExtensionSupported ("GL_EXT_texture_compression_s3tc"))
  {
    g_qeglobals.bTextureCompressionSupported = 1;
    g_qeglobals.m_bS3CompressionSupported = 1;
  }

  g_qeglobals.m_bOpenGLReady = true;

  g_PrefsDlg.UpdateTextureCompression();

#ifdef ATIHACK_812
  g_PrefsDlg.UpdateATIHack();
#endif

  g_qeglobals_gui.d_camera = m_pWidget;
}

void CamWnd::Cam_Init ()
{
  m_Camera.timing = false;
  m_Camera.origin[0] = 0.f;
  m_Camera.origin[1] = 20.f;
  m_Camera.origin[2] = 46.f;
  m_Camera.color[0] = 0.3f;
  m_Camera.color[1] = 0.3f;
  m_Camera.color[2] = 0.3f;
  m_nCambuttonstate = 0;
}

void CamWnd::OnSize(int cx, int cy)
{
  m_Camera.width = cx;
  m_Camera.height = cy;
  gtk_widget_queue_draw(m_pWidget);
}

rectangle_t rectangle_from_area_cam()
{
  const float left = MIN(g_qeglobals.d_vAreaTL[0], g_qeglobals.d_vAreaBR[0]);
  const float top = MAX(g_qeglobals.d_vAreaTL[1], g_qeglobals.d_vAreaBR[1]);
  const float right = MAX(g_qeglobals.d_vAreaTL[0], g_qeglobals.d_vAreaBR[0]);
  const float bottom = MIN(g_qeglobals.d_vAreaTL[1], g_qeglobals.d_vAreaBR[1]);
  return rectangle_t(left, bottom, right - left, top - bottom);
}

void update_xor_rectangle(XORRectangle& xor_rectangle)
{
  rectangle_t rectangle;
	if ((g_qeglobals.d_select_mode == sel_area))
    rectangle = rectangle_from_area_cam();
  xor_rectangle.set(rectangle);
}

void CamWnd::OnMouseMove(guint32 flags, int pointx, int pointy)
{
  int height = m_pWidget->allocation.height;
  // NOTE RR2DO2 this hasn't got any use anymore really. It is an old qeradiant feature
  // that can be re-enabled by removing the checks for HasCapture and not shift/ctrl down
  // but the scaling/rotating (unless done with the steps set in the surface inspector
  // dialog) is way too sensitive to be of any use
  if (HasCapture () && Sys_AltDown () &&
      !((flags & MK_SHIFT) || (flags & MK_CONTROL)))
  {
    if (flags & MK_CONTROL)
      Select_RotateTexture(pointy - m_ptLastCursorY);
    else
    if (flags & MK_SHIFT)
      Select_ScaleTexture(pointx - m_ptLastCursorX, m_ptLastCursorY - pointy);
    else
      Select_ShiftTexture(pointx - m_ptLastCursorX, m_ptLastCursorY - pointy);
  }
  else
  {
    Cam_MouseMoved(pointx, height - 1 - pointy, flags);
  }
  m_ptLastCursorX = pointx;
  m_ptLastCursorY = pointy;

  update_xor_rectangle(m_XORRectangle);
}

void CamWnd::OnMouseWheel(bool bUp)
{
  if (bUp)
    VectorMA (m_Camera.origin, g_PrefsDlg.m_nMoveSpeed, m_Camera.forward, m_Camera.origin);
  else
    VectorMA (m_Camera.origin, -g_PrefsDlg.m_nMoveSpeed, m_Camera.forward, m_Camera.origin);

  int nUpdate = (g_PrefsDlg.m_bCamXYUpdate) ? (W_CAMERA | W_XY) : (W_CAMERA);
  Sys_UpdateWindows (nUpdate);
  g_pParentWnd->OnTimer ();
}

void CamWnd::OnLButtonDown(guint32 nFlags, int pointx, int pointy)
{
  m_ptLastCursorX = pointx;
  m_ptLastCursorY = pointy;
  OriginalMouseDown(nFlags, pointx, pointy);
}

void CamWnd::OnLButtonUp(guint32 nFlags, int pointx, int pointy)
{
  OriginalMouseUp(nFlags, pointx, pointy);
}

void CamWnd::OnMButtonDown(guint32 nFlags, int pointx, int pointy)
{
  OriginalMouseDown(nFlags, pointx, pointy);
}

void CamWnd::OnMButtonUp(guint32 nFlags, int pointx, int pointy)
{
  OriginalMouseUp(nFlags, pointx, pointy);
}

void CamWnd::OnRButtonDown(guint32 nFlags, int pointx, int pointy)
{
  OriginalMouseDown(nFlags, pointx, pointy);
}

void CamWnd::OnRButtonUp(guint32 nFlags, int pointx, int pointy)
{
  OriginalMouseUp(nFlags, pointx, pointy);
}

void CamWnd::OriginalMouseUp(guint32 nFlags, int pointx, int pointy)
{
  int height = m_pWidget->allocation.height;

  if(g_qeglobals.d_select_mode == sel_facets_on || g_qeglobals.d_select_mode == sel_facets_off)
  {
    g_qeglobals.d_select_mode = sel_brush;
  }

  Cam_MouseUp(pointx, height - 1 - pointy, nFlags);
  ReleaseCapture ();

  update_xor_rectangle(m_XORRectangle);
}

void CamWnd::OriginalMouseDown(guint32 nFlags, int pointx, int pointy)
{
  int height = m_pWidget->allocation.height;

  SetFocus();
  SetCapture();
  Cam_MouseDown (pointx, height - 1 - pointy, nFlags);

  update_xor_rectangle(m_XORRectangle);
}

void CamWnd::Cam_BuildMatrix()
{
  float	ya;
  float	matrix[4][4];
  int		i;

  if (!m_bFreeMove)
  {
    ya = m_Camera.angles[1]/180*Q_PI;

    // the movement matrix is kept 2d
    m_Camera.forward[0] = cos(ya);
    m_Camera.forward[1] = sin(ya);
    m_Camera.forward[2] = 0;
    m_Camera.right[0] = m_Camera.forward[1];
    m_Camera.right[1] = -m_Camera.forward[0];
  }
  else
  {
    AngleVectors( m_Camera.angles, m_Camera.forward, m_Camera.right, NULL );
    m_Camera.forward[2] = -m_Camera.forward[2];
  }

  memcpy(matrix, m_Camera.projection, sizeof(m4x4_t));
  m4x4_multiply_by_m4x4(&matrix[0][0], &m_Camera.modelview[0][0]);

  //qglGetFloatv (GL_PROJECTION_MATRIX, &matrix[0][0]);

  for (i=0 ; i<3 ; i++)
  {
    m_Camera.vright[i] = matrix[i][0];
    m_Camera.vup[i] = matrix[i][1];
    m_Camera.vpn[i] = matrix[i][2];
  }

  VectorNormalize (m_Camera.vright, m_Camera.vright);
  VectorNormalize (m_Camera.vup, m_Camera.vup);
  VectorNormalize (m_Camera.vpn, m_Camera.vpn);
}

void CamWnd::Cam_ChangeFloor (qboolean up)
{
  brush_t	*b;
  float	d, bestd, current;
  vec3_t	start, dir;

  start[0] = m_Camera.origin[0];
  start[1] = m_Camera.origin[1];
  start[2] = g_MaxWorldCoord;
  dir[0] = dir[1] = 0;
  dir[2] = -1;

  current = g_MaxWorldCoord - (m_Camera.origin[2] - 48);
  if (up)
    bestd = 0;
  else
    bestd = 2*g_MaxWorldCoord;

  for (b=active_brushes.next ; b != &active_brushes ; b=b->next)
  {
    if (!Brush_Ray (start, dir, b, &d))
      continue;
    if (up && d < current && d > bestd)
      bestd = d;
    if (!up && d > current && d < bestd)
      bestd = d;
  }

  if (bestd == 0 || bestd == 2*g_MaxWorldCoord)
    return;

  m_Camera.origin[2] += current - bestd;
  Sys_UpdateWindows (W_CAMERA|W_Z_OVERLAY);
}

void CamWnd::Cam_PositionDrag()
{
  int x, y;

  Sys_GetCursorPos (&x, &y);
  if (x != m_ptCursorX || y != m_ptCursorY)
  {
    x -= m_ptCursorX;
    VectorMA (m_Camera.origin, x, m_Camera.vright, m_Camera.origin);
    y -= m_ptCursorY;
    m_Camera.origin[2] -= y;
    Sys_SetCursorPos(m_ptCursorX, m_ptCursorY);
    Sys_UpdateWindows (W_CAMERA | W_XY_OVERLAY);
  }
}

void CamWnd::Cam_MouseControl (float dtime)
{
  Cam_KeyControl (dtime);

  if( g_PrefsDlg.m_bCamFreeLook )
  {
    int dx, dy;
    gint x, y;

    if( !m_bFreeMove || m_nCambuttonstate == MK_CONTROL )
      return;

    // Update angles
    Sys_GetCursorPos(&m_ptCursorX, &m_ptCursorY);

    dx = m_ptLastCamCursorX - m_ptCursorX;
    dy = m_ptLastCamCursorY - m_ptCursorY;

    gdk_window_get_origin( m_pWidget->window, &x, &y);

    m_ptLastCamCursorX = x + (m_Camera.width / 2);
    m_ptLastCamCursorY = y + (m_Camera.height / 2);

    Sys_SetCursorPos(m_ptLastCamCursorX, m_ptLastCamCursorY);

    // Don't use pitch
    if(!g_PrefsDlg.m_bCamFreeLookStrafe) {
      if (g_PrefsDlg.m_bCamInverseMouse)
            m_Camera.angles[PITCH] -= dy * dtime * g_PrefsDlg.m_nAngleSpeed;
      else
            m_Camera.angles[PITCH] += dy * dtime * g_PrefsDlg.m_nAngleSpeed;
    } else {
      VectorMA (m_Camera.origin, dy * (float) (g_PrefsDlg.m_nMoveSpeed / 6.0f), m_Camera.forward, m_Camera.origin);
    }

    m_Camera.angles[YAW] += dx * dtime * g_PrefsDlg.m_nAngleSpeed;

    if (m_Camera.angles[PITCH] > 90)
      m_Camera.angles[PITCH] = 90;
    else if (m_Camera.angles[PITCH] < -90)
      m_Camera.angles[PITCH] = -90;

    if (m_Camera.angles[YAW] >= 360)
      m_Camera.angles[YAW] = 0;
    else if (m_Camera.angles[YAW] <= -360)
      m_Camera.angles[YAW] = 0;

    if( dx || dy || m_Camera.movementflags )
    {
      int nUpdate = (g_PrefsDlg.m_bCamXYUpdate) ? (W_CAMERA | W_XY) : (W_CAMERA);
      Sys_UpdateWindows (nUpdate);
      g_pParentWnd->OnTimer ();
    }
  }
  else
  {
    int   xl, xh;
    int	yl, yh;
    float	xf, yf;

    if (g_PrefsDlg.m_nMouseButtons == 2)
    {
      if (m_nCambuttonstate != (MK_RBUTTON | MK_SHIFT))
        return;
    }
    else
    {
      if (m_nCambuttonstate != MK_RBUTTON)
        return;
    }

    xf = (float)(m_ptButtonX - m_Camera.width/2) / (m_Camera.width/2);
    yf = (float)(m_ptButtonY - m_Camera.height/2) / (m_Camera.height/2);

    xl = m_Camera.width/3;
    xh = xl*2;
    yl = m_Camera.height/3;
    yh = yl*2;

    xf *= 1.0 - fabs(yf);
    if (xf < 0)
    {
      xf += 0.1f;
      if (xf > 0)
        xf = 0;
    }
    else
    {
      xf -= 0.1f;
      if (xf < 0)
        xf = 0;
    }

    VectorMA (m_Camera.origin, yf*dtime*g_PrefsDlg.m_nMoveSpeed, m_Camera.forward, m_Camera.origin);
    m_Camera.angles[YAW] += xf*-dtime*g_PrefsDlg.m_nAngleSpeed;

    int nUpdate = (g_PrefsDlg.m_bCamXYUpdate) ? (W_CAMERA | W_XY) : (W_CAMERA);
    Sys_UpdateWindows (nUpdate);
    g_pParentWnd->OnTimer ();
  }
}

void CamWnd::Cam_KeyControl (float dtime) {

  // Update angles
  if (m_Camera.movementflags & MOVE_ROTLEFT)
    m_Camera.angles[YAW] += 15*dtime*g_PrefsDlg.m_nAngleSpeed;
  if (m_Camera.movementflags & MOVE_ROTRIGHT)
    m_Camera.angles[YAW] -= 15*dtime*g_PrefsDlg.m_nAngleSpeed;

  // Update position
  if (m_Camera.movementflags & MOVE_FORWARD)
    VectorMA (m_Camera.origin, dtime*g_PrefsDlg.m_nMoveSpeed, m_Camera.forward, m_Camera.origin);
  if (m_Camera.movementflags & MOVE_BACK)
    VectorMA (m_Camera.origin, -dtime*g_PrefsDlg.m_nMoveSpeed, m_Camera.forward, m_Camera.origin);
  if (m_Camera.movementflags & MOVE_STRAFELEFT)
    VectorMA (m_Camera.origin, -dtime*g_PrefsDlg.m_nMoveSpeed, m_Camera.right, m_Camera.origin);
  if (m_Camera.movementflags & MOVE_STRAFERIGHT)
    VectorMA (m_Camera.origin, dtime*g_PrefsDlg.m_nMoveSpeed, m_Camera.right, m_Camera.origin);

  // Save a screen update (when m_bFreeMove is enabled, mousecontrol does the update)
  if( !m_bFreeMove && m_Camera.movementflags )
  {
     int nUpdate = (g_PrefsDlg.m_bCamXYUpdate) ? (W_CAMERA | W_XY) : (W_CAMERA);
     Sys_UpdateWindows (nUpdate);
     g_pParentWnd->OnTimer ();
  }
}

// NOTE TTimo if there's an OS-level focus out of the application
//   then we can release the camera cursor grab
static gint camwindow_focusout(GtkWidget* widget, GdkEventKey* event, gpointer data)
{
  g_pParentWnd->GetCamWnd ()->ToggleFreeMove();
  return FALSE;
}

void CamWnd::ToggleFreeMove()
{
  GdkWindow *window;
  GtkWidget *widget;

  m_bFreeMove = !m_bFreeMove;
  Camera()->movementflags = 0;
  m_ptLastCamCursorX = m_ptCursorX;
  m_ptLastCamCursorY = m_ptCursorY;

  if (g_pParentWnd->CurrentStyle() == MainFrame::eFloating)
  {
    widget = g_pParentWnd->GetCamWnd ()->m_pParent;
    window = widget->window;
  }
  else
  {
    widget = g_pParentWnd->m_pWidget;
    window = widget->window;
  }

  if (m_bFreeMove)
  {

    SetFocus();
    SetCapture();

    {
      GdkPixmap *pixmap;
      GdkBitmap *mask;
      char buffer [(32 * 32)/8];
      memset (buffer, 0, (32 * 32)/8);
      GdkColor white = {0, 0xffff, 0xffff, 0xffff};
      GdkColor black = {0, 0x0000, 0x0000, 0x0000};
      pixmap = gdk_bitmap_create_from_data (NULL, buffer, 32, 32);
      mask   = gdk_bitmap_create_from_data (NULL, buffer, 32, 32);
      GdkCursor *cursor = gdk_cursor_new_from_pixmap (pixmap, mask, &white, &black, 1, 1);

      gdk_window_set_cursor (window, cursor);
      gdk_cursor_unref (cursor);
      gdk_drawable_unref (pixmap);
      gdk_drawable_unref (mask);
    }

    // RR2DO2: FIXME why does this only work the 2nd and
    // further times the event is called? (floating windows
    // mode seems to work fine though...)
    m_FocusOutHandler_id = gtk_signal_connect (GTK_OBJECT (widget), "focus_out_event",
                      GTK_SIGNAL_FUNC (camwindow_focusout), g_pParentWnd);

    {
      GdkEventMask mask = (GdkEventMask)(GDK_POINTER_MOTION_MASK
      | GDK_POINTER_MOTION_HINT_MASK
      | GDK_BUTTON_MOTION_MASK
      | GDK_BUTTON1_MOTION_MASK
      | GDK_BUTTON2_MOTION_MASK
      | GDK_BUTTON3_MOTION_MASK
      | GDK_BUTTON_PRESS_MASK
      | GDK_BUTTON_RELEASE_MASK);

      gdk_pointer_grab(widget->window, TRUE, mask, widget->window, NULL, GDK_CURRENT_TIME);
    }
  }
  else
  {
    gdk_pointer_ungrab(GDK_CURRENT_TIME);

    gtk_signal_disconnect (GTK_OBJECT (widget), m_FocusOutHandler_id);

    GdkCursor *cursor = gdk_cursor_new (GDK_LEFT_PTR);
    gdk_window_set_cursor (window, cursor);
    gdk_cursor_unref (cursor);

    ReleaseCapture();
  }

  int nUpdate = (g_PrefsDlg.m_bCamXYUpdate) ? (W_CAMERA | W_XY) : (W_CAMERA);
  Sys_UpdateWindows (nUpdate);
  g_pParentWnd->OnTimer ();
}

void CamWnd::Cam_MouseDown(int x, int y, int buttons)
{
  vec3_t  dir;
  float	  f, r, u;
  int     i;


  //
  // calc ray direction
  //
  u = (float)( y - ( m_Camera.height * .5f ) ) / ( m_Camera.width * .5f );
  r = (float)( x - ( m_Camera.width * .5f ) ) / ( m_Camera.width * .5f );
  f = 1;

  for (i=0 ; i<3 ; i++)
    dir[i] = m_Camera.vpn[i] * f + m_Camera.vright[i] * r + m_Camera.vup[i] * u;
  VectorNormalize (dir, dir);

  Sys_GetCursorPos(&m_ptCursorX, &m_ptCursorY);

  m_nCambuttonstate = buttons;
  m_ptButtonX = x;
  m_ptButtonY = y;

  // LBUTTON = manipulate selection
  // shift-LBUTTON = select
  // middle button = grab texture
  // ctrl-middle button = set entire brush to texture
  // ctrl-shift-middle button = set single face to texture
  int nMouseButton = g_PrefsDlg.m_nMouseButtons == 2 ? MK_RBUTTON : MK_MBUTTON;
  if ((buttons == MK_LBUTTON)
      || (buttons == (MK_LBUTTON | MK_SHIFT))
      || (buttons == (MK_LBUTTON | MK_CONTROL))
      || (buttons == (MK_LBUTTON | MK_CONTROL | MK_SHIFT))
      || (buttons == nMouseButton)
      || (buttons == (nMouseButton|MK_SHIFT))
      || (buttons == (nMouseButton|MK_CONTROL))
      || (buttons == (nMouseButton|MK_SHIFT|MK_CONTROL)))
  {
    if (g_PrefsDlg.m_nMouseButtons == 2 && (buttons == (MK_RBUTTON | MK_SHIFT)))
    {
      if (g_PrefsDlg.m_bCamFreeLook)
        ToggleFreeMove();
      else
        Cam_MouseControl (0.1f);
    }
    else
    {
      // something global needs to track which window is responsible for stuff
      Patch_SetView(W_CAMERA);
      Drag_Begin (x, y, buttons, m_Camera.vright, m_Camera.vup,	m_Camera.origin, dir, true);
    }
    return;
  }

  if (buttons == MK_RBUTTON)
  {
    if (g_PrefsDlg.m_bCamFreeLook)
      ToggleFreeMove();
    else
      Cam_MouseControl (0.1f);
    return;
  }
}

void CamWnd::Cam_MouseUp (int x, int y, int buttons)
{
  m_nCambuttonstate = 0;
  Drag_MouseUp (buttons);
}

void CamWnd::Cam_MouseMoved (int x, int y, int buttons)
{
  m_nCambuttonstate = buttons;
  if (!buttons)
    return;

  if( g_PrefsDlg.m_nCamDragMultiSelect )
  {
    if (g_qeglobals.d_select_mode == sel_brush_on  || g_qeglobals.d_select_mode == sel_brush_off)
    {
      bool bDoDragMultiSelect = FALSE;

      if( g_PrefsDlg.m_nCamDragMultiSelect == 1 && buttons == (MK_LBUTTON|MK_SHIFT) )
        bDoDragMultiSelect = TRUE;
      else if( g_PrefsDlg.m_nCamDragMultiSelect == 2 && buttons == (MK_LBUTTON|MK_CONTROL) && Sys_AltDown() )
        bDoDragMultiSelect = TRUE;

      if( bDoDragMultiSelect )
      {
        vec3_t  dir;
        float   f, r, u;
        int     i;

        //
        // calc ray direction
        //
        u = (float)( y - ( m_Camera.height * .5f ) ) / ( m_Camera.width * .5f );
        r = (float)( x - ( m_Camera.width * .5f ) ) / ( m_Camera.width * .5f );
        f = 1;

        for (i=0 ; i<3 ; i++)
          dir[i] = m_Camera.vpn[i] * f + m_Camera.vright[i] * r + m_Camera.vup[i] * u;
        VectorNormalize (dir,dir);

        switch( g_qeglobals.d_select_mode )
        {
        case sel_brush_on:
          Select_Ray( m_Camera.origin, dir, (SF_DRAG_ON|SF_CAMERA) );
          break;

        case sel_brush_off:
          Select_Ray( m_Camera.origin, dir, (SF_DRAG_OFF|SF_CAMERA) );
          break;

        default:
          break;
        }
        return;
      }
    }
    else if (g_qeglobals.d_select_mode == sel_facets_on || g_qeglobals.d_select_mode == sel_facets_off)
    {
      if( buttons == (MK_LBUTTON|MK_CONTROL|MK_SHIFT) )
      {
        vec3_t dir;
        float		f, r, u;
        int			i;

        //
        // calc ray direction
        //
        u = (float)( y - ( m_Camera.height * .5f ) ) / ( m_Camera.width * .5f );
        r = (float)( x - ( m_Camera.width * .5f ) ) / ( m_Camera.width * .5f );
        f = 1;

        for (i=0 ; i<3 ; i++)
          dir[i] = m_Camera.vpn[i] * f + m_Camera.vright[i] * r + m_Camera.vup[i] * u;
        VectorNormalize (dir,dir);

        switch( g_qeglobals.d_select_mode )
        {
        case sel_facets_on:
          Select_Ray( m_Camera.origin, dir, (SF_SINGLEFACE|SF_DRAG_ON|SF_CAMERA) );
          break;

        case sel_facets_off:
          Select_Ray( m_Camera.origin, dir, (SF_SINGLEFACE|SF_DRAG_OFF|SF_CAMERA) );
          break;

        default:
          break;
        }
        return;
      }
    }
  }

  m_ptButtonX = x;
  m_ptButtonY = y;

  if ( (m_bFreeMove && (buttons & MK_CONTROL) && !(buttons & MK_SHIFT)) || (!m_bFreeMove && (buttons == (MK_RBUTTON|MK_CONTROL))) )
  {
    Cam_PositionDrag ();
    Sys_UpdateWindows (W_XY|W_CAMERA|W_Z);
    return;
  }

  Sys_GetCursorPos(&m_ptCursorX, &m_ptCursorY);

  if (buttons & (MK_LBUTTON | MK_MBUTTON) )
  {
    Drag_MouseMoved (x, y, buttons);
    if(g_qeglobals.d_select_mode != sel_area)
      Sys_UpdateWindows (W_XY|W_CAMERA|W_Z);
  }
}

void CamWnd::InitCull()
{
  int i;

  VectorSubtract (m_Camera.vpn, m_Camera.vright, m_vCull1);
  VectorAdd (m_Camera.vpn, m_Camera.vright, m_vCull2);

  for (i=0 ; i<3 ; i++)
  {
    if (m_vCull1[i] > 0)
      m_nCullv1[i] = 3+i;
    else
      m_nCullv1[i] = i;
    if (m_vCull2[i] > 0)
      m_nCullv2[i] = 3+i;
    else
      m_nCullv2[i] = i;
  }
}

qboolean CamWnd::CullBrush (brush_t *b)
{
  int	 i;
  vec3_t point;
  float	 d;

  if (g_PrefsDlg.m_bCubicClipping)
  {
    float fLevel = g_PrefsDlg.m_nCubicScale * 64;

    point[0] = m_Camera.origin[0] - fLevel;
    point[1] = m_Camera.origin[1] - fLevel;
    point[2] = m_Camera.origin[2] - fLevel;

    for (i=0; i<3; i++)
      if (b->mins[i] < point[i] && b->maxs[i] < point[i])
	return true;

    point[0] = m_Camera.origin[0] + fLevel;
    point[1] = m_Camera.origin[1] + fLevel;
    point[2] = m_Camera.origin[2] + fLevel;

    for (i=0; i<3; i++)
      if (b->mins[i] > point[i] && b->maxs[i] > point[i])
	return true;
  }

  for (i=0 ; i<3 ; i++)
    point[i] = b->mins[m_nCullv1[i]] - m_Camera.origin[i];

  d = DotProduct (point, m_vCull1);
  if (d < -1)
    return true;

  for (i=0 ; i<3 ; i++)
    point[i] = b->mins[m_nCullv2[i]] - m_Camera.origin[i];

  d = DotProduct (point, m_vCull2);
  if (d < -1)
    return true;

  return false;
}

// project a 3D point onto the camera space
// we use the GL viewing matrixes
// this is the implementation of a glu function (I realized that afterwards): gluProject
void CamWnd::ProjectCamera(const vec3_t A, vec_t B[2])
{

  vec_t P1[4],P2[4],P3[4];
  VectorCopy(A,P1); P1[3] = 1;

  GLMatMul(m_Camera.modelview , P1, P2);
  GLMatMul(m_Camera.projection, P2, P3);

  // we ASSUME that the view port is 0 0 m_Camera.width m_Camera.height (you can check in Cam_Draw)
  B[0] = (float)m_Camera.width  * ( P3[0] + 1.0 ) / 2.0;
  B[1] = (float)m_Camera.height * ( P3[1] + 1.0 ) / 2.0;

}

// vec defines a direction in geometric space and P an origin point
// the user is interacting from the camera view
// (for example with texture adjustment shortcuts)
// and intuitively if he hits left / right / up / down
//   what happens in geometric space should match the left/right/up/down move in camera space
// axis = 0: vec is along left/right
// axis = 1: vec is along up/down
// sgn = +1: same directions
// sgn = -1: opposite directions
// Implementation:
//   typical use case is giving a face center and a normalized vector
//   1) compute start and endpoint, project them in camera view, get the direction
//     depending on the situation, we might bump into precision issues with that
//   2) possible to compute the projected direction independently?
//     this solution would be better but right now I don't see how to do it..
void CamWnd::MatchViewAxes(const vec3_t P, const vec3_t vec, int &axis, float &sgn)
{

  vec_t A[2],B[2],V[2];
  ProjectCamera(P,A);
  vec3_t Q;
  VectorAdd(P,vec,Q);
  ProjectCamera(Q,B);
  // V is the vector projected in camera space
  V[0] = B[0] - A[0];
  V[1] = B[1] - A[1];
  if (fabs(V[0])>fabs(V[1]))
  {
    // best match is against right
    axis = 0;
    if (V[0]>0)
      sgn = +1;
    else
      sgn = -1;
  }
  else
  {
    // best match is against up
    axis = 1;
    if (V[1]>0)
      sgn = +1;
    else
      sgn = -1;
  }
}

#if 0
void CamWnd::DrawLightRadius(brush_t* pBrush)
{
  // if lighting
  int nRadius = Brush_LightRadius(pBrush);
  if (nRadius > 0)
  {
    Brush_SetLightColor(pBrush);
	  qglEnable (GL_BLEND);
	  qglPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
	  qglBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
	  qglDisable (GL_TEXTURE_2D);

    qglEnable(GL_TEXTURE_2D);
    qglDisable(GL_BLEND);
    qglPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
  }
}
#endif

extern void DrawPatchMesh(patchMesh_t *pm);
extern void DrawPatchControls(patchMesh_t *pm);
extern void Brush_DrawFacingAngle (brush_t *b, entity_t *e);
extern void Brush_DrawModel(brush_t *b, bool bTextured = false);
extern void DrawModelOrigin(brush_t *b);
extern void DrawModelBBox(brush_t *b);

void CamWnd::Cam_DrawBrush(brush_t *b, int mode)
{
  int nGLState = m_Camera.draw_glstate;
  int nModelMode = g_PrefsDlg.m_nEntityShowState;

	GLfloat material[4], identity[4];
	VectorSet(identity, 0.8f, 0.8f, 0.8f);
	IShader *pShader;

  // lights
  if (b->owner->eclass->fixedsize && b->owner->eclass->nShowFlags & ECLASS_LIGHT && g_PrefsDlg.m_bNewLightDraw)
  {
		switch (mode)
		{
		case DRAW_SOLID:
		  VectorCopy(b->owner->color, material);
			VectorScale(material, 0.8f, material);
      material[3] = 1.0f;

      qglColor4fv(material);

      if (g_PrefsDlg.m_bNewLightDraw)
        DrawLight(b->owner, nGLState, (IsBrushSelected(b)) ? g_PrefsDlg.m_nLightRadiuses : 0, 0);

			break;
		}
  }

  // models
  else if(b->owner->eclass->fixedsize && b->owner->model.pRender
    && !(!IsBrushSelected(b) && (nModelMode & ENTITY_SELECTED_ONLY)))
  {
    switch (mode)
		{
		case DRAW_TEXTURED:
			if (!(nModelMode & ENTITY_WIREFRAME) && nModelMode != ENTITY_BOX)
			{
				VectorCopy(b->owner->eclass->color, material);
				material[3] = identity[3] = 1.0f;

				qglEnable(GL_CULL_FACE);

				if(!(nGLState & DRAW_GL_TEXTURE_2D)) qglColor4fv(material);
        else qglColor4fv(identity);
				if(nGLState & DRAW_GL_LIGHTING) qglShadeModel(GL_SMOOTH);

				b->owner->model.pRender->Draw(nGLState, DRAW_RF_CAM);
			}
			break;
		case DRAW_WIRE:
      VectorCopy(b->owner->eclass->color, material);
		  material[3] = 1.0f;
		  qglColor4fv(material);

			// model view mode "wireframe" or "selected wire"
			if(nModelMode & ENTITY_WIREFRAME)
				b->owner->model.pRender->Draw(nGLState, DRAW_RF_CAM);

			// model view mode "skinned and boxed"
      if(!(b->owner->eclass->nShowFlags & ECLASS_MISCMODEL) )
      {
		    qglColor4fv(material);
        aabb_draw(b->owner->model.pRender->GetAABB(), DRAW_GL_WIRE);
      }
      else if(nModelMode & ENTITY_BOXED)
      {
				aabb_draw(b->owner->model.pRender->GetAABB(), DRAW_GL_WIRE);
      }
/*
      if(!(nModelMode & ENTITY_BOXED) && b->owner->eclass->nShowFlags & ECLASS_MISCMODEL)
			  DrawModelOrigin(b);
*/
		}
  }

  // patches
  else if (b->patchBrush)
  {
		bool bTrans = (b->pPatch->pShader->getTrans() < 1.0f);
		switch(mode)
		{
		case DRAW_TEXTURED:
			if (!g_bPatchWireFrame && ((nGLState & DRAW_GL_BLEND && bTrans) || (!(nGLState & DRAW_GL_BLEND) && !bTrans)))
			{
				qglDisable(GL_CULL_FACE);

				pShader = b->pPatch->pShader;
        VectorCopy(pShader->getTexture()->color, material);
				material[3] = identity[3] = pShader->getTrans();

        if(nGLState & DRAW_GL_TEXTURE_2D) {
          qglColor4fv(identity);
					qglBindTexture(GL_TEXTURE_2D, pShader->getTexture()->texture_number);
        }
				else
					qglColor4fv(material);
				if(nGLState & DRAW_GL_LIGHTING) qglShadeModel(GL_SMOOTH);

				DrawPatchMesh(b->pPatch);
			}
			break;
		case DRAW_WIRE:
      if (g_bPatchWireFrame)
      {
        VectorCopy(b->pPatch->pShader->getTexture()->color, material);
				material[3] = 1.0;
        qglColor4fv(material);
        DrawPatchMesh(b->pPatch);
      }
      if ( b->pPatch->bSelected && (g_qeglobals.d_select_mode == sel_curvepoint
        || g_qeglobals.d_select_mode == sel_area
        || g_bPatchBendMode))
        DrawPatchControls(b->pPatch);
    }
  }

  // brushes
  else if(b->owner->eclass->fixedsize)
  {
		switch(mode)
		{
    case DRAW_SOLID:
			VectorCopy(b->owner->eclass->color, material);
			VectorScale(material, 0.8f, material);
      material[3] = 1.0f;
      qglColor4fv(material);

			qglEnable(GL_CULL_FACE);
			qglShadeModel(GL_FLAT);
      Brush_Draw(b);
      break;
    case DRAW_WIRE:
			if((g_qeglobals.d_savedinfo.include & INCLUDE_ANGLES)
      && (b->owner->eclass->nShowFlags & ECLASS_ANGLE))
				Brush_DrawFacingAngle(b, b->owner);
    }
  }

  // brushes
  else
  {
		switch(mode)
		{
		case DRAW_TEXTURED:
			qglEnable(GL_CULL_FACE);
			qglShadeModel(GL_FLAT);
      Brush_Draw(b);
    }
  }
}

void CamWnd::Cam_DrawBrushes(int mode)
{
  brush_t *b;
  brush_t *pList = (g_bClipMode && g_pSplitList) ? g_pSplitList : &selected_brushes;

  for(b = active_brushes.next; b != &active_brushes; b=b->next)
    if (!b->bFiltered && !b->bCamCulled) Cam_DrawBrush(b, mode);
  for(b = pList->next; b != pList; b=b->next)
    if (!b->bFiltered && !b->bCamCulled) Cam_DrawBrush(b, mode);
}

void CamWnd::Cam_DrawStuff()
{
	GLfloat identity[4];
	VectorSet(identity, 0.8f, 0.8f, 0.8f);
	brush_t *b;

  for(b = active_brushes.next; b != &active_brushes; b=b->next)
    b->bCamCulled = CullBrush(b);

	for(b = selected_brushes.next; b != &selected_brushes; b=b->next)
    b->bCamCulled = CullBrush(b);

	switch (m_Camera.draw_mode)
  {
  case cd_wire:
    qglPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
    qglDisable(GL_TEXTURE_2D);
    qglDisable(GL_TEXTURE_1D);
    qglDisable(GL_BLEND);
    qglEnable(GL_DEPTH_TEST);
		qglEnableClientState(GL_VERTEX_ARRAY);
		qglDisableClientState(GL_TEXTURE_COORD_ARRAY);
		qglShadeModel(GL_FLAT);
		if(g_PrefsDlg.m_bGLLighting) {
      qglDisable(GL_LIGHTING);
		  qglDisable(GL_COLOR_MATERIAL);
	  	qglDisableClientState(GL_NORMAL_ARRAY);
    }
		m_Camera.draw_glstate = DRAW_GL_WIRE;
    break;

  case cd_solid:
    qglCullFace(GL_FRONT);
    qglEnable(GL_CULL_FACE);
    qglShadeModel (GL_FLAT);
    qglPolygonMode (GL_FRONT, GL_LINE);
    qglPolygonMode (GL_BACK, GL_FILL);
    qglDisable(GL_TEXTURE_2D);
    qglDisable(GL_BLEND);
    qglEnable(GL_DEPTH_TEST);
		qglEnableClientState(GL_VERTEX_ARRAY);
		qglDisableClientState(GL_TEXTURE_COORD_ARRAY);
		qglPolygonOffset(-1.0, 2);
		if(g_PrefsDlg.m_bGLLighting) {
      qglEnable(GL_LIGHTING);
		  qglEnable(GL_COLOR_MATERIAL);
//    qglEnable(GL_RESCALE_NORMAL);
		  qglEnableClientState(GL_NORMAL_ARRAY);
    }
		m_Camera.draw_glstate = DRAW_GL_SOLID;
    break;

  case cd_texture:
    qglCullFace(GL_FRONT);
    qglEnable(GL_CULL_FACE);
    qglShadeModel (GL_FLAT);
    qglPolygonMode (GL_FRONT, GL_LINE);
    qglPolygonMode (GL_BACK, GL_FILL);
    qglEnable(GL_TEXTURE_2D);
    qglTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
    qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
    qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
    qglDisable(GL_BLEND);
    qglEnable(GL_DEPTH_TEST);
		qglEnableClientState(GL_VERTEX_ARRAY);
		qglEnableClientState(GL_TEXTURE_COORD_ARRAY);
		if(g_PrefsDlg.m_bGLLighting) {
      qglEnable(GL_LIGHTING);
		  qglDisable(GL_COLOR_MATERIAL);
		  qglMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, identity);
		  qglEnableClientState(GL_NORMAL_ARRAY);
//    qglEnable(GL_RESCALE_NORMAL);
    }
		qglPolygonOffset(-1.0, 2);
		m_Camera.draw_glstate = DRAW_GL_TEXTURED;
    break;

	default: Sys_Printf("CamWnd::Cam_DrawStuff:invalid render mode\n");
  }

  Cam_DrawBrushes(DRAW_TEXTURED);

	// setup for solid stuff
	switch(m_Camera.draw_mode)
	{
		case cd_texture:
			qglDisable(GL_TEXTURE_2D);
			m_Camera.draw_glstate &= ~DRAW_GL_TEXTURE_2D;
		  if(g_PrefsDlg.m_bGLLighting)
			  qglEnable(GL_COLOR_MATERIAL);
			qglDisableClientState(GL_TEXTURE_COORD_ARRAY);
			break;
		case cd_solid:
			break;
		case cd_wire:
			break;
		default: Sys_Printf("CamWnd::Cam_DrawStuff:invalid render mode\n");
	}

	qglEnable(GL_CULL_FACE);
	qglShadeModel(GL_FLAT);
	Cam_DrawBrushes(DRAW_SOLID);

	// setup for wireframe stuff
	switch(m_Camera.draw_mode)
	{
		case cd_texture:
      if(g_PrefsDlg.m_bGLLighting) {
			  qglDisable(GL_LIGHTING);
        qglDisable(GL_COLOR_MATERIAL);
			  qglDisableClientState(GL_NORMAL_ARRAY);
//      qglDisable(GL_RESCALE_NORMAL);
      }
			qglPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
			break;
		case cd_solid:
      if(g_PrefsDlg.m_bGLLighting) {
        qglDisable(GL_LIGHTING);
			  qglDisable(GL_COLOR_MATERIAL);
			  qglDisableClientState(GL_NORMAL_ARRAY);
//      qglDisable(GL_RESCALE_NORMAL);
      }
			qglPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
			break;
		case cd_wire:
			break;
		default: Sys_Printf("CamWnd::Cam_DrawStuff:invalid render mode\n");
	}

  qglDisable(GL_CULL_FACE);
  Cam_DrawBrushes(DRAW_WIRE);

	// setup for transparent texture stuff
	switch(m_Camera.draw_mode)
	{
		case cd_texture:
			qglPolygonMode (GL_FRONT, GL_LINE);
			qglPolygonMode (GL_BACK, GL_FILL);
      if(g_PrefsDlg.m_bGLLighting) {
			  qglEnable(GL_COLOR_MATERIAL);
			  qglEnableClientState(GL_NORMAL_ARRAY);
			  qglMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, identity);
      }
			qglEnable(GL_TEXTURE_2D);
			qglEnableClientState(GL_TEXTURE_COORD_ARRAY);
			m_Camera.draw_glstate = DRAW_GL_TEXTURED;
			break;
		case cd_solid:
			qglPolygonMode (GL_FRONT, GL_LINE);
			qglPolygonMode (GL_BACK, GL_FILL);
      if(g_PrefsDlg.m_bGLLighting) {
			  qglEnable(GL_LIGHTING);
			  qglEnable(GL_COLOR_MATERIAL);
			  qglEnableClientState(GL_NORMAL_ARRAY);
//      qglEnable(GL_RESCALE_NORMAL);
      }
			m_Camera.draw_glstate = DRAW_GL_SOLID;
			break;
		case cd_wire:
			m_Camera.draw_glstate = DRAW_GL_WIRE;
			break;
		default: Sys_Printf("CamWnd::Cam_DrawStuff:invalid render mode\n");
	}


	qglEnable(GL_BLEND);
	m_Camera.draw_glstate |= DRAW_GL_BLEND;
  qglBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
  // FIXME: some .TGA are buggy, have a completely empty alpha channel
  // if such brushes are rendered in this loop they would be totally transparent with GL_MODULATE
  // so I decided using GL_DECAL instead
  // if an empty-alpha-channel or nearly-empty texture is used. It will be blank-transparent.
  // this could get better if you can get qglTexEnviv (GL_TEXTURE_ENV, to work .. patches are welcome
  // Arnout: empty alpha channels are now always filled with data. Don't set this anymore (would cause problems with qer_alphafunc too)
//  qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);

	Cam_DrawBrushes(DRAW_TEXTURED);

//  qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
  qglDisable(GL_BLEND);

	// setup for wireframe stuff
	switch(m_Camera.draw_mode)
	{
		case cd_texture:
      if(g_PrefsDlg.m_bGLLighting) {
			  qglDisable(GL_COLOR_MATERIAL);
        qglDisable(GL_LIGHTING);
//      qglDisable(GL_RESCALE_NORMAL);
      }
			break;
		case cd_solid:
      if(g_PrefsDlg.m_bGLLighting) {
			  qglDisable(GL_COLOR_MATERIAL);
        qglDisable(GL_LIGHTING);
//      qglDisable(GL_RESCALE_NORMAL);
      }
			break;
		case cd_wire:
			break;
		default: Sys_Printf("CamWnd::Cam_DrawStuff:invalid render mode\n");
	}

}

/*
==============
Cam_Draw
==============
*/

void QueueClear ();
void QueueDraw ();

void CamWnd::Cam_Draw()
{
  brush_t	*brush;
  face_t	*face;
  float	screenaspect;
  float	yfov;
  double	start = 0.0, end;
  int		i;

  if (!active_brushes.next)
    return;	// not valid yet

  if (m_Camera.timing)
    start = Sys_DoubleTime ();

  //
  // clear
  //
  QE_CheckOpenGLForErrors();

  qglViewport(0, 0, m_Camera.width, m_Camera.height);
  qglClearColor (g_qeglobals.d_savedinfo.colors[COLOR_CAMERABACK][0],
		 g_qeglobals.d_savedinfo.colors[COLOR_CAMERABACK][1],
		 g_qeglobals.d_savedinfo.colors[COLOR_CAMERABACK][2], 0);
  qglClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

  //
  // set up viewpoint
  //


  qglMatrixMode(GL_PROJECTION);
  qglLoadIdentity ();

  screenaspect = (float)m_Camera.width / m_Camera.height;
  yfov = 2*atan((float)m_Camera.height / m_Camera.width)*180/Q_PI;
  qgluPerspective (yfov,  screenaspect,  8,  32768);

  // we're too lazy to calc projection matrix ourselves!!!
  qglGetFloatv (GL_PROJECTION_MATRIX, &m_Camera.projection[0][0]);

  vec3_t vec;

  m4x4_identity(&m_Camera.modelview[0][0]);
  VectorSet(vec, -90, 0, 0);
  m4x4_rotate_by_vec3(&m_Camera.modelview[0][0], vec, eXYZ);
  VectorSet(vec, 0, 0, 90);
  m4x4_rotate_by_vec3(&m_Camera.modelview[0][0], vec, eXYZ);
  VectorSet(vec, 0, m_Camera.angles[0], 0);
  m4x4_rotate_by_vec3(&m_Camera.modelview[0][0], vec, eXYZ);
  VectorSet(vec, 0, 0, -m_Camera.angles[1]);
  m4x4_rotate_by_vec3(&m_Camera.modelview[0][0], vec, eXYZ);
  VectorSet(vec, -m_Camera.origin[0],  -m_Camera.origin[1],  -m_Camera.origin[2]);
  m4x4_translate_by_vec3(&m_Camera.modelview[0][0], vec);

  Cam_BuildMatrix ();

  qglMatrixMode(GL_MODELVIEW);
  qglLoadIdentity();

  qglMultMatrixf(&m_Camera.modelview[0][0]);

  // grab the GL_PROJECTION and GL_MODELVIEW matrixes
  //   used in GetRelativeAxes
  //qglGetFloatv (GL_PROJECTION_MATRIX, &m_Camera.projection[0][0]);
  //qglGetFloatv (GL_MODELVIEW_MATRIX, &m_Camera.modelview[0][0]);

#if 0
  // TTimo: this is not used, just for verification (0, 0, m_Camera.width, m_Camera.height)
  GLint viewprt[4];
  qglGetIntegerv (GL_VIEWPORT, viewprt);
#endif

  if (g_PrefsDlg.m_bGLLighting)
  {
    GLfloat inverse_cam_dir[4], ambient[4], diffuse[4];//, material[4];

    ambient[0] = ambient[1] = ambient[2] = 0.6f;
    ambient[3] = 1.0f;
    diffuse[0] = diffuse[1] = diffuse[2] = 0.4f;
    diffuse[3] = 1.0f;
    //material[0] = material[1] = material[2] = 0.8f;
    //material[3] = 1.0f;

    vec3_t vCam, vRotate;
    VectorSet(vCam, -1, 0, 0); //default cam pos
    VectorSet(vRotate, 0, -m_Camera.angles[0], 0);
    VectorRotate(vCam, vRotate, vCam);
    VectorSet(vRotate, 0, 0, m_Camera.angles[1]);
    VectorRotate(vCam, vRotate, vCam);

    inverse_cam_dir[0] = vCam[0];
    inverse_cam_dir[1] = vCam[1];
    inverse_cam_dir[2] = vCam[2];
    inverse_cam_dir[3] = 0;

    qglColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE);

    qglLightfv(GL_LIGHT0, GL_POSITION, inverse_cam_dir);

    qglLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
    qglLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);

    qglEnable(GL_LIGHT0);
  }

  InitCull ();

  //
  // draw stuff
  //

	Cam_DrawStuff();

	qglEnableClientState(GL_VERTEX_ARRAY);
	qglDisableClientState(GL_NORMAL_ARRAY);
	qglDisableClientState(GL_TEXTURE_COORD_ARRAY);
	qglDisable (GL_TEXTURE_2D);
	qglDisable (GL_LIGHTING);
	qglDisable (GL_COLOR_MATERIAL);

  qglEnable (GL_CULL_FACE);

  brush_t* pList = (g_bClipMode && g_pSplitList) ? g_pSplitList : &selected_brushes;

  if (g_qeglobals.d_savedinfo.iSelectedOutlinesStyle & OUTLINE_BSEL)
  {
    qglColor4f(g_qeglobals.d_savedinfo.colors[COLOR_SELBRUSHES3D][0], g_qeglobals.d_savedinfo.colors[COLOR_SELBRUSHES3D][1], g_qeglobals.d_savedinfo.colors[COLOR_SELBRUSHES3D][2], 0.3f);
    qglEnable (GL_BLEND);
    qglBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
    qglDepthFunc (GL_LEQUAL);
    for (brush = pList->next ; brush != pList ; brush=brush->next)
    {
      if (brush->bCamCulled) // draw selected faces of filtered brushes to remind that there is a selection
        continue;

      if (brush->patchBrush && (g_qeglobals.d_select_mode == sel_curvepoint || g_qeglobals.d_select_mode == sel_area))
        continue;

      if (!g_PrefsDlg.m_bPatchBBoxSelect && brush->patchBrush)
      {
        DrawPatchMesh(brush->pPatch);
      }
      else if(brush->owner->model.pRender && g_PrefsDlg.m_nEntityShowState != ENTITY_BOX)
      {
        brush->owner->model.pRender->Draw(DRAW_GL_FLAT, (DRAW_RF_SEL_OUTLINE|DRAW_RF_CAM));
      }
      else
      {
        for (face=brush->brush_faces ; face ; face=face->next)
          Brush_FaceDraw(face, DRAW_GL_FLAT);
      }
    }


    int nCount = g_ptrSelectedFaces.GetSize();
    if (nCount > 0)
    {
      for (int i = 0; i < nCount; i++)
      {
        face_t *selFace = reinterpret_cast<face_t*>(g_ptrSelectedFaces.GetAt(i));
        Brush_FaceDraw(selFace, DRAW_GL_FLAT);
      }
    }

    qglDisableClientState(GL_NORMAL_ARRAY);
	  qglDepthFunc (GL_LESS);
  }

  if (g_qeglobals.d_savedinfo.iSelectedOutlinesStyle & OUTLINE_ZBUF)
  {
    // non-zbuffered outline
    qglDisable (GL_BLEND);
    qglDisable (GL_DEPTH_TEST);
    qglPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
    qglColor3f (1, 1, 1);
    for (brush = pList->next ; brush != pList ; brush=brush->next)
    {
      if ((brush->patchBrush && (g_qeglobals.d_select_mode == sel_curvepoint || g_qeglobals.d_select_mode == sel_area)))
        continue;

      if (!g_PrefsDlg.m_bPatchBBoxSelect && brush->patchBrush)
      {
        DrawPatchMesh(brush->pPatch);
      }
      else if(brush->owner->model.pRender && g_PrefsDlg.m_nEntityShowState != ENTITY_BOX)
      {
        brush->owner->model.pRender->Draw(DRAW_GL_WIRE, (DRAW_RF_SEL_FILL|DRAW_RF_CAM));

        // Hydra : always draw bbox outline!
        aabb_draw(brush->owner->model.pRender->GetAABB(), DRAW_GL_WIRE);
      }
      else
      {
        for (face=brush->brush_faces ; face ; face=face->next)
          Brush_FaceDraw(face, DRAW_GL_WIRE);
      }
    }
  }

  // edge / vertex flags
  if (g_qeglobals.d_select_mode == sel_vertex)
  {
    // GL_POINTS on Kyro Workaround
    if(!g_PrefsDlg.m_bGlPtWorkaround)
    {
      // brush verts
      qglPointSize (4);
 	   	qglColor3f (0,1,0);
      qglBegin (GL_POINTS);
        for (i=0 ; i<g_qeglobals.d_numpoints ; i++)
          qglVertex3fv (g_qeglobals.d_points[i]);
      qglEnd ();

      if(g_qeglobals.d_num_move_points)
      {
        // selected brush verts
        qglPointSize (5);
        qglColor3f (0,0,1);
        qglBegin (GL_POINTS);
          for(i = 0; i < g_qeglobals.d_num_move_points; i++)
            qglVertex3fv (g_qeglobals.d_move_points[i]);
        qglEnd();
      }

      qglPointSize (1);
    }
    else
    {
      // brush verts
      qglColor3f (0,1,0);
      qglLineWidth(2.0);
      qglBegin (GL_LINES);
        for (i=0; i < g_qeglobals.d_numpoints; i++)
          DrawAlternatePoint(g_qeglobals.d_points[i], 1.5);
      qglEnd();

      if(g_qeglobals.d_num_move_points)
      {
        // selected brush verts
        qglColor3f (0,0,1);
        qglLineWidth (3.0);
        qglBegin (GL_LINES);
          for(i = 0; i < g_qeglobals.d_num_move_points; i++)
            qglVertex3fv (g_qeglobals.d_move_points[i]);
        qglEnd();
      }
      qglLineWidth(1.0);
    }
  }
  else if (g_qeglobals.d_select_mode == sel_edge)
  {
    float	*v1, *v2;
    // GL_POINTS on Kyro Workaround
    if(!g_PrefsDlg.m_bGlPtWorkaround)
    {
      qglPointSize (4);
      qglColor3f (0,0,1);
      qglBegin (GL_POINTS);
      for (i=0 ; i<g_qeglobals.d_numedges ; i++)
      {
        v1 = g_qeglobals.d_points[g_qeglobals.d_edges[i].p1];
        v2 = g_qeglobals.d_points[g_qeglobals.d_edges[i].p2];
        qglVertex3f ( (v1[0]+v2[0])*0.5,(v1[1]+v2[1])*0.5,(v1[2]+v2[2])*0.5);
      }
      qglEnd ();
      qglPointSize (1);
    }
    else {
      qglColor3f (0,0,1);
      qglLineWidth(2.0);
      qglBegin (GL_LINES);
      for (i=0; i < g_qeglobals.d_numedges; i++)
      {
        v1 = g_qeglobals.d_points[g_qeglobals.d_edges[i].p1];
        v2 = g_qeglobals.d_points[g_qeglobals.d_edges[i].p2];
        vec3_t v3;
        v3[0] = (v1[0]+v2[0])*0.5;
        v3[1] = (v1[1]+v2[1])*0.5;
        v3[2] = (v1[2]+v2[2])*0.5;
        DrawAlternatePoint(v3, 1.5);
      }
      qglEnd();
      qglLineWidth(1.0);
    }
  }

  //
  // draw pointfile
  //
  qglEnable(GL_DEPTH_TEST);
  DrawPathLines();

  if (g_qeglobals.d_pointfile_display_list)
  {
    Pointfile_Draw();
  }

  // call the drawing routine of plugin entities
  //++timo FIXME: we might need to hook in other places as well for transparency etc.
  //++timo FIXME: also needs a way to get some parameters about the view
  //++timo FIXME: maybe provide some culling API on Radiant side?
  Draw3DPluginEntities();

  // draw the crosshair
  if (m_bFreeMove)
  {
    // setup orthographic projection mode
    qglMatrixMode(GL_PROJECTION);
    //qglPushMatrix();
    qglLoadIdentity();
    qglDisable(GL_DEPTH_TEST);
    qglOrtho(0, (float)m_Camera.width, 0, (float)m_Camera.height, -100, 100);
    qglScalef(1, -1, 1);
	  qglTranslatef(0, -(float)m_Camera.height, 0);
	  qglMatrixMode(GL_MODELVIEW);

    // draw crosshair
    //qglPushMatrix();
	  qglLoadIdentity();
    qglColor3f( 1.f, 1.f, 1.f );
    qglBegin( GL_LINES );
    qglVertex2f( (float)m_Camera.width / 2.f, (float)m_Camera.height / 2.f + 6 );
    qglVertex2f( (float)m_Camera.width / 2.f, (float)m_Camera.height / 2.f + 2 );
    qglVertex2f( (float)m_Camera.width / 2.f, (float)m_Camera.height / 2.f - 6 );
    qglVertex2f( (float)m_Camera.width / 2.f, (float)m_Camera.height / 2.f - 2 );
    qglVertex2f( (float)m_Camera.width / 2.f + 6, (float)m_Camera.height / 2.f );
    qglVertex2f( (float)m_Camera.width / 2.f + 2, (float)m_Camera.height / 2.f );
    qglVertex2f( (float)m_Camera.width / 2.f - 6, (float)m_Camera.height / 2.f );
    qglVertex2f( (float)m_Camera.width / 2.f - 2, (float)m_Camera.height / 2.f );
    qglEnd();
    //qglPopMatrix();

    // reset perspective projection
	  //qglMatrixMode(GL_PROJECTION);
	  //qglPopMatrix();
	  //qglMatrixMode(GL_MODELVIEW);
  }

#if 0
	if ((g_qeglobals.d_select_mode == sel_area) && (g_nPatchClickedView == W_CAMERA))
	{
		// setup orthographic projection mode
		qglMatrixMode(GL_PROJECTION);
		//qglPushMatrix();
		qglLoadIdentity();
		qglDisable(GL_DEPTH_TEST);
		qglOrtho(0, (float)m_Camera.width, 0, (float)m_Camera.height, -100, 100);
		//qglScalef(1, -1, 1);
		//qglTranslatef(0, -(float)m_Camera.height, 0);
		qglMatrixMode(GL_MODELVIEW);

  	// area selection hack
		qglLoadIdentity();
		qglDisable(GL_CULL_FACE);
		qglEnable (GL_BLEND);
		qglPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
		qglBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
		qglColor4f(0.0, 0.0, 1.0, 0.25);
		qglRectf(g_qeglobals.d_vAreaTL[0], g_qeglobals.d_vAreaTL[1], g_qeglobals.d_vAreaBR[0], g_qeglobals.d_vAreaBR[1]);
		qglPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
		qglDisable (GL_BLEND);
		qglEnable (GL_CULL_FACE);
	}
#endif

  // bind back to the default texture so that we don't have problems
  // elsewhere using/modifying texture maps between contexts
  qglBindTexture( GL_TEXTURE_2D, 0 );

  qglFinish();
  QE_CheckOpenGLForErrors();
  //	Sys_EndWait();
  if (m_Camera.timing)
  {
    end = Sys_DoubleTime ();
    Sys_Printf ("Camera: %i ms\n", (int)(1000*(end-start)));
  }

  for (brush = active_brushes.next ; brush != &active_brushes ; brush=brush->next)
    brush->bCamCulled = false;

  for (brush = pList->next ; brush != pList ; brush=brush->next)
    brush->bCamCulled = false;
}

void CamWnd::OnExpose ()
{
  if (!MakeCurrent ())
  {
    Sys_Printf("ERROR: glXMakeCurrent failed..\n ");
    Sys_Printf("Please restart Radiant if the camera view is not working\n");
  }
  else
  {
    QE_CheckOpenGLForErrors();
    g_pSplitList = NULL;
    if (g_bClipMode)
    {
      if (g_Clip1.Set() && g_Clip2.Set())
      {
        g_pSplitList = (g_bSwitch) ?
	  &g_brBackSplits : &g_brFrontSplits;
      }
    }

    Patch_LODMatchAll(); // spog

    Cam_Draw ();
    QE_CheckOpenGLForErrors ();

    m_XORRectangle.set(rectangle_t());
    SwapBuffers ();
  }
}

void CamWnd::BenchMark()
{
  if (!MakeCurrent ())
    Error ("glXMakeCurrent failed in Benchmark");

  qglDrawBuffer (GL_FRONT);
  double dStart = Sys_DoubleTime ();
  for (int i=0 ; i < 100 ; i++)
  {
    m_Camera.angles[YAW] = i*4;
    Cam_Draw();
  }
  SwapBuffers ();
  qglDrawBuffer (GL_BACK);
  double dEnd = Sys_DoubleTime ();
  Sys_Printf ("%5.2f seconds\n", dEnd - dStart);
}