2 Copyright (C) 2001-2006, William Joseph.
5 This file is part of GtkRadiant.
7 GtkRadiant is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 GtkRadiant is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GtkRadiant; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 #if !defined(INCLUDED_RENDER_H)
23 #define INCLUDED_RENDER_H
26 /// \brief High-level constructs for efficient OpenGL rendering.
31 #include "container/array.h"
32 #include "math/vector.h"
37 typedef unsigned int RenderIndex;
38 const GLenum RenderIndexTypeID = GL_UNSIGNED_INT;
40 /// \brief A resizable buffer of indices.
43 typedef std::vector<RenderIndex> Indices;
46 typedef Indices::iterator iterator;
47 typedef Indices::const_iterator const_iterator;
51 return m_data.begin();
53 const_iterator begin() const
55 return m_data.begin();
61 const_iterator end() const
68 return m_data.empty();
70 std::size_t size() const
74 const RenderIndex* data() const
76 return &(*m_data.begin());
78 RenderIndex& operator[](std::size_t index)
82 const RenderIndex& operator[](std::size_t index) const
90 void reserve(std::size_t max_indices)
92 m_data.reserve(max_indices);
94 void insert(RenderIndex index)
96 m_data.push_back(index);
98 void swap(IndexBuffer& other)
100 std::swap(m_data, m_data);
106 /// \brief Swaps the values of \p self and \p other.
107 /// Overloads std::swap.
108 inline void swap(IndexBuffer& self, IndexBuffer& other)
114 /// \brief A resizable buffer of vertices.
115 /// \param Vertex The vertex data type.
116 template<typename Vertex>
119 typedef typename std::vector<Vertex> Vertices;
122 typedef typename Vertices::iterator iterator;
123 typedef typename Vertices::const_iterator const_iterator;
127 return m_data.begin();
133 const_iterator begin() const
135 return m_data.begin();
137 const_iterator end() const
144 return m_data.empty();
146 RenderIndex size() const
148 return RenderIndex(m_data.size());
150 const Vertex* data() const
152 return &(*m_data.begin());
154 Vertex& operator[](std::size_t index)
156 return m_data[index];
158 const Vertex& operator[](std::size_t index) const
160 return m_data[index];
167 void reserve(std::size_t max_vertices)
169 m_data.reserve(max_vertices);
171 void push_back(const Vertex& vertex)
173 m_data.push_back(vertex);
177 /// \brief A wrapper around a VertexBuffer which inserts only vertices which have not already been inserted.
178 /// \param Vertex The vertex data type. Must support operator<, operator== and operator!=.
179 /// For best performance, quantise vertices before inserting them.
180 template<typename Vertex>
181 class UniqueVertexBuffer
183 typedef VertexBuffer<Vertex> Vertices;
189 : m_left(0), m_right(0)
196 std::vector<bnode> m_btree;
201 const RenderIndex find_or_insert(const Vertex& vertex)
203 RenderIndex index = 0;
207 if(vertex < m_data[index])
209 bnode& node = m_btree[index];
217 node.m_left = RenderIndex(m_btree.size());
218 m_btree.push_back(bnode());
219 m_data.push_back(vertex);
220 return RenderIndex(m_btree.size()-1);
223 if(m_data[index] < vertex)
225 bnode& node = m_btree[index];
226 if(node.m_right != 0)
228 index = node.m_right;
233 node.m_right = RenderIndex(m_btree.size());
234 m_btree.push_back(bnode());
235 m_data.push_back(vertex);
236 return RenderIndex(m_btree.size()-1);
244 UniqueVertexBuffer(Vertices& data)
245 : m_data(data), m_prev0(0), m_prev1(0), m_prev2(0)
249 typedef typename Vertices::const_iterator iterator;
251 iterator begin() const
253 return m_data.begin();
260 std::size_t size() const
262 return m_data.size();
264 const Vertex* data() const
266 return &(*m_data.begin());
268 Vertex& operator[](std::size_t index)
270 return m_data[index];
272 const Vertex& operator[](std::size_t index) const
274 return m_data[index];
285 void reserve(std::size_t max_vertices)
287 m_data.reserve(max_vertices);
288 m_btree.reserve(max_vertices);
290 /// \brief Returns the index of the element equal to \p vertex.
291 RenderIndex insert(const Vertex& vertex)
295 m_data.push_back(vertex);
296 m_btree.push_back(bnode());
300 if(m_data[m_prev0] == vertex)
302 if(m_prev1 != m_prev0 && m_data[m_prev1] == vertex)
304 if(m_prev2 != m_prev0 && m_prev2 != m_prev1 && m_data[m_prev2] == vertex)
309 m_prev0 = find_or_insert(vertex);
316 /// \brief A 4-byte colour.
319 unsigned char r, g, b, a;
325 Colour4b(unsigned char _r, unsigned char _g, unsigned char _b, unsigned char _a)
326 : r(_r), g(_g), b(_b), a(_a)
331 inline bool operator<(const Colour4b& self, const Colour4b& other)
333 if(self.r != other.r)
335 return self.r < other.r;
337 if(self.g != other.g)
339 return self.g < other.g;
341 if(self.b != other.b)
343 return self.b < other.b;
345 if(self.a != other.a)
347 return self.a < other.a;
352 inline bool operator==(const Colour4b& self, const Colour4b& other)
354 return self.r == other.r && self.g == other.g && self.b == other.b && self.a == other.a;
357 inline bool operator!=(const Colour4b& self, const Colour4b& other)
359 return !operator==(self, other);
362 /// \brief A 3-float vertex.
371 Vertex3f(float _x, float _y, float _z)
372 : x(_x), y(_y), z(_z)
377 inline bool operator<(const Vertex3f& self, const Vertex3f& other)
379 if(self.x != other.x)
381 return self.x < other.x;
383 if(self.y != other.y)
385 return self.y < other.y;
387 if(self.z != other.z)
389 return self.z < other.z;
394 inline bool operator==(const Vertex3f& self, const Vertex3f& other)
396 return self.x == other.x && self.y == other.y && self.z == other.z;
399 inline bool operator!=(const Vertex3f& self, const Vertex3f& other)
401 return !operator==(self, other);
405 inline const Vertex3f& vertex3f_from_array(const float* array)
407 return *reinterpret_cast<const Vertex3f*>(array);
410 inline float* vertex3f_to_array(Vertex3f& vertex)
412 return reinterpret_cast<float*>(&vertex);
415 inline const float* vertex3f_to_array(const Vertex3f& vertex)
417 return reinterpret_cast<const float*>(&vertex);
420 const Vertex3f vertex3f_identity(0, 0, 0);
422 inline Vertex3f vertex3f_for_vector3(const Vector3& vector3)
424 return Vertex3f(vector3.x(), vector3.y(), vector3.z());
427 inline const Vector3& vertex3f_to_vector3(const Vertex3f& vertex)
429 return reinterpret_cast<const Vector3&>(vertex);
432 inline Vector3& vertex3f_to_vector3(Vertex3f& vertex)
434 return reinterpret_cast<Vector3&>(vertex);
438 /// \brief A 3-float normal.
447 Normal3f(float _x, float _y, float _z)
448 : x(_x), y(_y), z(_z)
453 inline bool operator<(const Normal3f& self, const Normal3f& other)
455 if(self.x != other.x)
457 return self.x < other.x;
459 if(self.y != other.y)
461 return self.y < other.y;
463 if(self.z != other.z)
465 return self.z < other.z;
470 inline bool operator==(const Normal3f& self, const Normal3f& other)
472 return self.x == other.x && self.y == other.y && self.z == other.z;
475 inline bool operator!=(const Normal3f& self, const Normal3f& other)
477 return !operator==(self, other);
481 inline Normal3f normal3f_from_array(const float* array)
483 return Normal3f(array[0], array[1], array[2]);
486 inline float* normal3f_to_array(Normal3f& normal)
488 return reinterpret_cast<float*>(&normal);
491 inline const float* normal3f_to_array(const Normal3f& normal)
493 return reinterpret_cast<const float*>(&normal);
496 inline Normal3f normal3f_for_vector3(const Vector3& vector3)
498 return Normal3f(vector3.x(), vector3.y(), vector3.z());
501 inline const Vector3& normal3f_to_vector3(const Normal3f& normal)
503 return reinterpret_cast<const Vector3&>(normal);
506 inline Vector3& normal3f_to_vector3(Normal3f& normal)
508 return reinterpret_cast<Vector3&>(normal);
512 /// \brief A 2-float texture-coordinate set.
521 TexCoord2f(float _s, float _t)
527 inline bool operator<(const TexCoord2f& self, const TexCoord2f& other)
529 if(self.s != other.s)
531 return self.s < other.s;
533 if(self.t != other.t)
535 return self.t < other.t;
540 inline bool operator==(const TexCoord2f& self, const TexCoord2f& other)
542 return self.s == other.s && self.t == other.t;
545 inline bool operator!=(const TexCoord2f& self, const TexCoord2f& other)
547 return !operator==(self, other);
551 inline float* texcoord2f_to_array(TexCoord2f& texcoord)
553 return reinterpret_cast<float*>(&texcoord);
556 inline const float* texcoord2f_to_array(const TexCoord2f& texcoord)
558 return reinterpret_cast<const float*>(&texcoord);
561 inline const TexCoord2f& texcoord2f_from_array(const float* array)
563 return *reinterpret_cast<const TexCoord2f*>(array);
566 inline TexCoord2f texcoord2f_for_vector2(const Vector2& vector2)
568 return TexCoord2f(vector2.x(), vector2.y());
571 inline const Vector2& texcoord2f_to_vector2(const TexCoord2f& vertex)
573 return reinterpret_cast<const Vector2&>(vertex);
576 inline Vector2& texcoord2f_to_vector2(TexCoord2f& vertex)
578 return reinterpret_cast<Vector2&>(vertex);
581 /// \brief Returns \p normal rescaled to be unit-length.
582 inline Normal3f normal3f_normalised(const Normal3f& normal)
584 return normal3f_for_vector3(vector3_normalised(normal3f_to_vector3(normal)));
587 enum UnitSphereOctant
589 UNITSPHEREOCTANT_000 = 0 << 0 | 0 << 1 | 0 << 2,
590 UNITSPHEREOCTANT_001 = 0 << 0 | 0 << 1 | 1 << 2,
591 UNITSPHEREOCTANT_010 = 0 << 0 | 1 << 1 | 0 << 2,
592 UNITSPHEREOCTANT_011 = 0 << 0 | 1 << 1 | 1 << 2,
593 UNITSPHEREOCTANT_100 = 1 << 0 | 0 << 1 | 0 << 2,
594 UNITSPHEREOCTANT_101 = 1 << 0 | 0 << 1 | 1 << 2,
595 UNITSPHEREOCTANT_110 = 1 << 0 | 1 << 1 | 0 << 2,
596 UNITSPHEREOCTANT_111 = 1 << 0 | 1 << 1 | 1 << 2,
599 /// \brief Returns the octant for \p normal indicating the sign of the region of unit-sphere space it lies within.
600 inline UnitSphereOctant normal3f_classify_octant(const Normal3f& normal)
602 return static_cast<UnitSphereOctant>(
603 ((normal.x > 0) << 0) | ((normal.y > 0) << 1) | ((normal.z > 0) << 2)
607 /// \brief Returns \p normal with its components signs made positive based on \p octant.
608 inline Normal3f normal3f_fold_octant(const Normal3f& normal, UnitSphereOctant octant)
612 case UNITSPHEREOCTANT_000:
613 return Normal3f(-normal.x, -normal.y, -normal.z);
614 case UNITSPHEREOCTANT_001:
615 return Normal3f(normal.x, -normal.y, -normal.z);
616 case UNITSPHEREOCTANT_010:
617 return Normal3f(-normal.x, normal.y, -normal.z);
618 case UNITSPHEREOCTANT_011:
619 return Normal3f(normal.x, normal.y, -normal.z);
620 case UNITSPHEREOCTANT_100:
621 return Normal3f(-normal.x, -normal.y, normal.z);
622 case UNITSPHEREOCTANT_101:
623 return Normal3f(normal.x, -normal.y, normal.z);
624 case UNITSPHEREOCTANT_110:
625 return Normal3f(-normal.x, normal.y, normal.z);
626 case UNITSPHEREOCTANT_111:
627 return Normal3f(normal.x, normal.y, normal.z);
632 /// \brief Reverses the effect of normal3f_fold_octant() on \p normal with \p octant.
633 /// \p normal must have been obtained with normal3f_fold_octant().
634 /// \p octant must have been obtained with normal3f_classify_octant().
635 inline Normal3f normal3f_unfold_octant(const Normal3f& normal, UnitSphereOctant octant)
637 return normal3f_fold_octant(normal, octant);
640 enum UnitSphereSextant
642 UNITSPHERESEXTANT_XYZ = 0,
643 UNITSPHERESEXTANT_XZY = 1,
644 UNITSPHERESEXTANT_YXZ = 2,
645 UNITSPHERESEXTANT_YZX = 3,
646 UNITSPHERESEXTANT_ZXY = 4,
647 UNITSPHERESEXTANT_ZYX = 5,
650 /// \brief Returns the sextant for \p normal indicating how to sort its components so that x > y > z.
651 /// All components of \p normal must be positive.
652 /// \p normal must be normalised.
653 inline UnitSphereSextant normal3f_classify_sextant(const Normal3f& normal)
657 ? normal.x >= normal.z
658 ? normal.y >= normal.z
659 ? UNITSPHERESEXTANT_XYZ
660 : UNITSPHERESEXTANT_XZY
661 : UNITSPHERESEXTANT_ZXY
662 : normal.y >= normal.z
663 ? normal.x >= normal.z
664 ? UNITSPHERESEXTANT_YXZ
665 : UNITSPHERESEXTANT_YZX
666 : UNITSPHERESEXTANT_ZYX;
669 /// \brief Returns \p normal with its components sorted so that x > y > z based on \p sextant.
670 /// All components of \p normal must be positive.
671 /// \p normal must be normalised.
672 inline Normal3f normal3f_fold_sextant(const Normal3f& normal, UnitSphereSextant sextant)
676 case UNITSPHERESEXTANT_XYZ:
677 return Normal3f(normal.x, normal.y, normal.z);
678 case UNITSPHERESEXTANT_XZY:
679 return Normal3f(normal.x, normal.z, normal.y);
680 case UNITSPHERESEXTANT_YXZ:
681 return Normal3f(normal.y, normal.x, normal.z);
682 case UNITSPHERESEXTANT_YZX:
683 return Normal3f(normal.y, normal.z, normal.x);
684 case UNITSPHERESEXTANT_ZXY:
685 return Normal3f(normal.z, normal.x, normal.y);
686 case UNITSPHERESEXTANT_ZYX:
687 return Normal3f(normal.z, normal.y, normal.x);
692 /// \brief Reverses the effect of normal3f_fold_sextant() on \p normal with \p sextant.
693 /// \p normal must have been obtained with normal3f_fold_sextant().
694 /// \p sextant must have been obtained with normal3f_classify_sextant().
695 inline Normal3f normal3f_unfold_sextant(const Normal3f& normal, UnitSphereSextant sextant)
697 return normal3f_fold_sextant(normal, sextant);
700 const std::size_t c_quantise_normal = 1 << 6;
702 /// \brief All the components of \p folded must be positive and sorted so that x > y > z.
703 inline Normal3f normal3f_folded_quantised(const Normal3f& folded)
706 double scale = static_cast<float>(c_quantise_normal) / (folded.x + folded.y + folded.z);
707 unsigned int zbits = static_cast<unsigned int>(folded.z * scale);
708 unsigned int ybits = static_cast<unsigned int>(folded.y * scale);
711 return normal3f_normalised(Normal3f(
712 static_cast<float>(c_quantise_normal - zbits - ybits),
713 static_cast<float>(ybits),
714 static_cast<float>(zbits)
718 /// \brief Returns \p normal quantised by compressing and then decompressing its representation.
719 inline Normal3f normal3f_quantised_custom(const Normal3f& normal)
721 UnitSphereOctant octant = normal3f_classify_octant(normal);
722 Normal3f folded = normal3f_fold_octant(normal, octant);
723 UnitSphereSextant sextant = normal3f_classify_sextant(folded);
724 folded = normal3f_fold_sextant(folded, sextant);
725 return normal3f_unfold_octant(normal3f_unfold_sextant(normal3f_folded_quantised(folded), sextant), octant);
732 double longditude, latitude;
734 spherical_t(double _longditude, double _latitude)
735 : longditude(_longditude), latitude(_latitude)
743 phi = acos((2 * V) - 1);
746 V = (cos(phi) + 1) / 2;
749 longitude = atan(y / x);
752 struct uniformspherical_t
756 uniformspherical_t(double U_, double V_)
763 inline spherical_t spherical_from_normal3f(const Normal3f& normal)
765 return spherical_t(normal.x == 0 ? c_pi / 2 : normal.x > 0 ? atan(normal.y / normal.x) : atan(normal.y / normal.x) + c_pi, acos(normal.z));
768 inline Normal3f normal3f_from_spherical(const spherical_t& spherical)
771 static_cast<float>(cos(spherical.longditude) * sin(spherical.latitude)),
772 static_cast<float>(sin(spherical.longditude) * sin(spherical.latitude)),
773 static_cast<float>(cos(spherical.latitude))
777 inline uniformspherical_t uniformspherical_from_spherical(const spherical_t& spherical)
779 return uniformspherical_t(spherical.longditude * c_inv_2pi, (cos(spherical.latitude) + 1) * 0.5);
782 inline spherical_t spherical_from_uniformspherical(const uniformspherical_t& uniformspherical)
784 return spherical_t(c_2pi * uniformspherical.U, acos((2 * uniformspherical.V) - 1));
787 inline uniformspherical_t uniformspherical_from_normal3f(const Normal3f& normal)
789 return uniformspherical_from_spherical(spherical_from_normal3f(normal));
790 //return uniformspherical_t(atan2(normal.y / normal.x) * c_inv_2pi, (normal.z + 1) * 0.5);
793 inline Normal3f normal3f_from_uniformspherical(const uniformspherical_t& uniformspherical)
795 return normal3f_from_spherical(spherical_from_uniformspherical(uniformspherical));
798 /// \brief Returns a single-precision \p component quantised to \p precision.
799 inline float float_quantise(float component, float precision)
801 return float_snapped(component, precision);
804 /// \brief Returns a double-precision \p component quantised to \p precision.
805 inline double double_quantise(double component, double precision)
807 return float_snapped(component, precision);
810 inline spherical_t spherical_quantised(const spherical_t& spherical, float snap)
812 return spherical_t(double_quantise(spherical.longditude, snap), double_quantise(spherical.latitude, snap));
815 inline uniformspherical_t uniformspherical_quantised(const uniformspherical_t& uniformspherical, float snap)
817 return uniformspherical_t(double_quantise(uniformspherical.U, snap), double_quantise(uniformspherical.V, snap));
820 /// \brief Returns a \p vertex quantised to \p precision.
821 inline Vertex3f vertex3f_quantised(const Vertex3f& vertex, float precision)
823 return Vertex3f(float_quantise(vertex.x, precision), float_quantise(vertex.y, precision), float_quantise(vertex.z, precision));
826 /// \brief Returns a \p normal quantised to a fixed precision.
827 inline Normal3f normal3f_quantised(const Normal3f& normal)
829 return normal3f_quantised_custom(normal);
830 //return normal3f_from_spherical(spherical_quantised(spherical_from_normal3f(normal), snap));
831 //return normal3f_from_uniformspherical(uniformspherical_quantised(uniformspherical_from_normal3f(normal), snap));
832 // float_quantise(normal.x, snap), float_quantise(normal.y, snap), float_quantise(normal.y, snap));
835 /// \brief Returns a \p texcoord quantised to \p precision.
836 inline TexCoord2f texcoord2f_quantised(const TexCoord2f& texcoord, float precision)
838 return TexCoord2f(float_quantise(texcoord.s, precision), float_quantise(texcoord.t, precision));
841 /// \brief Standard vertex type for lines and points.
850 PointVertex(Vertex3f _vertex)
851 : colour(Colour4b(255, 255, 255, 255)), vertex(_vertex)
854 PointVertex(Vertex3f _vertex, Colour4b _colour)
855 : colour(_colour), vertex(_vertex)
860 inline bool operator<(const PointVertex& self, const PointVertex& other)
862 if(self.vertex != other.vertex)
864 return self.vertex < other.vertex;
866 if(self.colour != other.colour)
868 return self.colour < other.colour;
873 inline bool operator==(const PointVertex& self, const PointVertex& other)
875 return self.colour == other.colour && self.vertex == other.vertex;
878 inline bool operator!=(const PointVertex& self, const PointVertex& other)
880 return !operator==(self, other);
883 /// \brief Standard vertex type for lit/textured meshes.
884 struct ArbitraryMeshVertex
892 ArbitraryMeshVertex() : tangent(0, 0, 0), bitangent(0, 0, 0)
895 ArbitraryMeshVertex(Vertex3f _vertex, Normal3f _normal, TexCoord2f _texcoord)
896 : texcoord(_texcoord), normal(_normal), vertex(_vertex), tangent(0, 0, 0), bitangent(0, 0, 0)
901 inline bool operator<(const ArbitraryMeshVertex& self, const ArbitraryMeshVertex& other)
903 if(self.texcoord != other.texcoord)
905 return self.texcoord < other.texcoord;
907 if(self.normal != other.normal)
909 return self.normal < other.normal;
911 if(self.vertex != other.vertex)
913 return self.vertex < other.vertex;
918 inline bool operator==(const ArbitraryMeshVertex& self, const ArbitraryMeshVertex& other)
920 return self.texcoord == other.texcoord && self.normal == other.normal && self.vertex == other.vertex;
923 inline bool operator!=(const ArbitraryMeshVertex& self, const ArbitraryMeshVertex& other)
925 return !operator==(self, other);
928 const float c_quantise_vertex = 1.f / static_cast<float>(1 << 3);
930 /// \brief Returns \p v with vertex quantised to a fixed precision.
931 inline PointVertex pointvertex_quantised(const PointVertex& v)
933 return PointVertex(vertex3f_quantised(v.vertex, c_quantise_vertex), v.colour);
936 const float c_quantise_texcoord = 1.f / static_cast<float>(1 << 8);
938 /// \brief Returns \p v with vertex, normal and texcoord quantised to a fixed precision.
939 inline ArbitraryMeshVertex arbitrarymeshvertex_quantised(const ArbitraryMeshVertex& v)
941 return ArbitraryMeshVertex(vertex3f_quantised(v.vertex, c_quantise_vertex), normal3f_quantised(v.normal), texcoord2f_quantised(v.texcoord, c_quantise_texcoord));
945 /// \brief Sets up the OpenGL colour and vertex arrays for \p array.
946 inline void pointvertex_gl_array(const PointVertex* array)
948 glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(PointVertex), &array->colour);
949 glVertexPointer(3, GL_FLOAT, sizeof(PointVertex), &array->vertex);
952 class RenderablePointArray : public OpenGLRenderable
954 const Array<PointVertex>& m_array;
957 RenderablePointArray(const Array<PointVertex>& array, GLenum mode)
958 : m_array(array), m_mode(mode)
961 void render(RenderStateFlags state) const
963 #define NV_DRIVER_BUG 1
965 glColorPointer(4, GL_UNSIGNED_BYTE, 0, 0);
966 glVertexPointer(3, GL_FLOAT, 0, 0);
967 glDrawArrays(GL_TRIANGLE_FAN, 0, 0);
969 pointvertex_gl_array(m_array.data());
970 glDrawArrays(m_mode, 0, GLsizei(m_array.size()));
974 class RenderablePointVector : public OpenGLRenderable
976 std::vector<PointVertex> m_vector;
979 RenderablePointVector(GLenum mode)
984 void render(RenderStateFlags state) const
986 pointvertex_gl_array(&m_vector.front());
987 glDrawArrays(m_mode, 0, GLsizei(m_vector.size()));
990 std::size_t size() const
992 return m_vector.size();
996 return m_vector.empty();
1002 void reserve(std::size_t size)
1004 m_vector.reserve(size);
1006 void push_back(const PointVertex& point)
1008 m_vector.push_back(point);
1013 class RenderableVertexBuffer : public OpenGLRenderable
1015 const GLenum m_mode;
1016 const VertexBuffer<PointVertex>& m_vertices;
1018 RenderableVertexBuffer(GLenum mode, const VertexBuffer<PointVertex>& vertices)
1019 : m_mode(mode), m_vertices(vertices)
1023 void render(RenderStateFlags state) const
1025 pointvertex_gl_array(m_vertices.data());
1026 glDrawArrays(m_mode, 0, m_vertices.size());
1030 class RenderableIndexBuffer : public OpenGLRenderable
1032 const GLenum m_mode;
1033 const IndexBuffer& m_indices;
1034 const VertexBuffer<PointVertex>& m_vertices;
1036 RenderableIndexBuffer(GLenum mode, const IndexBuffer& indices, const VertexBuffer<PointVertex>& vertices)
1037 : m_mode(mode), m_indices(indices), m_vertices(vertices)
1041 void render(RenderStateFlags state) const
1044 pointvertex_gl_array(m_vertices.data());
1045 glDrawElements(m_mode, GLsizei(m_indices.size()), RenderIndexTypeID, m_indices.data());
1048 if(state & RENDER_COLOURARRAY != 0)
1050 for(std::size_t i = 0; i < m_indices.size(); ++i)
1052 glColor4ubv(&m_vertices[m_indices[i]].colour.r);
1053 glVertex3fv(&m_vertices[m_indices[i]].vertex.x);
1058 for(std::size_t i = 0; i < m_indices.size(); ++i)
1060 glVertex3fv(&m_vertices[m_indices[i]].vertex.x);
1072 static void set(Vertex3f& vertex, float x, float y, float z)
1083 static void set(Vertex3f& vertex, float x, float y, float z)
1094 static void set(Vertex3f& vertex, float x, float y, float z)
1102 template<typename remap_policy>
1103 inline void draw_circle(const std::size_t segments, const float radius, PointVertex* vertices, remap_policy remap)
1105 const double increment = c_pi / double(segments << 2);
1107 std::size_t count = 0;
1110 while(count < segments)
1112 PointVertex* i = vertices + count;
1113 PointVertex* j = vertices + ((segments << 1) - (count + 1));
1115 PointVertex* k = i + (segments << 1);
1116 PointVertex* l = j + (segments << 1);
1118 PointVertex* m = i + (segments << 2);
1119 PointVertex* n = j + (segments << 2);
1120 PointVertex* o = k + (segments << 2);
1121 PointVertex* p = l + (segments << 2);
1123 remap_policy::set(i->vertex, x,-y, 0);
1124 remap_policy::set(k->vertex,-y,-x, 0);
1125 remap_policy::set(m->vertex,-x, y, 0);
1126 remap_policy::set(o->vertex, y, x, 0);
1131 const double theta = increment * count;
1132 x = static_cast<float>(radius * cos(theta));
1133 y = static_cast<float>(radius * sin(theta));
1136 remap_policy::set(j->vertex, y,-x, 0);
1137 remap_policy::set(l->vertex,-x,-y, 0);
1138 remap_policy::set(n->vertex,-y, x, 0);
1139 remap_policy::set(p->vertex, x, y, 0);
1144 class PointVertexArrayIterator
1146 PointVertex* m_point;
1148 PointVertexArrayIterator(PointVertex* point)
1152 PointVertexArrayIterator& operator++()
1157 PointVertexArrayIterator operator++(int)
1159 PointVertexArrayIterator tmp(*this);
1163 Vertex3f& operator*()
1165 return m_point.vertex;
1167 Vertex3f* operator->()
1169 return &(operator*());
1173 template<typename remap_policy, typename iterator_type
1174 inline void draw_circle(const std::size_t segments, const float radius, iterator_type start, remap_policy remap)
1176 const float increment = c_pi / (double)(segments << 2);
1178 std::size_t count = 0;
1179 iterator_type pxpy(start);
1180 iterator_type pypx(pxpy + (segments << 1));
1181 iterator_type pynx(pxpy + (segments << 1));
1182 iterator_type nxpy(pypx + (segments << 1));
1183 iterator_type nxny(pypx + (segments << 1));
1184 iterator_type nynx(nxpy + (segments << 1));
1185 iterator_type nypx(nxpy + (segments << 1));
1186 iterator_type pxny(start);
1187 while(count < segments)
1189 const float theta = increment * count;
1190 const float x = radius * cos(theta);
1191 const float y = radius * sin(theta);
1193 remap_policy::set((*pxpy), x, y, 0);
1194 remap_policy::set((*pxny), x,-y, 0);
1195 remap_policy::set((*nxpy),-x, y, 0);
1196 remap_policy::set((*nxny),-x,-y, 0);
1198 remap_policy::set((*pypx), y, x, 0);
1199 remap_policy::set((*pynx), y,-x, 0);
1200 remap_policy::set((*nypx),-y, x, 0);
1201 remap_policy::set((*nynx),-y,-x, 0);
1205 template<typename remap_policy, typename iterator_type
1206 inline void draw_semicircle(const std::size_t segments, const float radius, iterator_type start, remap_policy remap)
1208 const float increment = c_pi / (double)(segments << 2);
1210 std::size_t count = 0;
1211 iterator_type pxpy(start);
1212 iterator_type pypx(pxpy + (segments << 1));
1213 iterator_type pynx(pxpy + (segments << 1));
1214 iterator_type nxpy(pypx + (segments << 1));
1215 iterator_type nxny(pypx + (segments << 1));
1216 iterator_type nynx(nxpy + (segments << 1));
1217 iterator_type nypx(nxpy + (segments << 1));
1218 iterator_type pxny(start);
1219 while(count < segments)
1221 const float theta = increment * count;
1222 const float x = radius * cos(theta);
1223 const float y = radius * sin(theta);
1225 remap_policy::set((*pxpy), x, y, 0);
1226 remap_policy::set((*pxny), x,-y, 0);
1227 remap_policy::set((*nxpy),-x, y, 0);
1228 remap_policy::set((*nxny),-x,-y, 0);
1230 //remap_policy::set((*pypx), y, x, 0);
1231 //remap_policy::set((*pynx), y,-x, 0);
1232 //remap_policy::set((*nypx),-y, x, 0);
1233 //remap_policy::set((*nynx),-y,-x, 0);
1240 inline void draw_quad(const float radius, PointVertex* quad)
1242 (*quad++).vertex = Vertex3f(-radius, radius, 0);
1243 (*quad++).vertex = Vertex3f(radius, radius, 0);
1244 (*quad++).vertex = Vertex3f(radius, -radius, 0);
1245 (*quad++).vertex = Vertex3f(-radius, -radius, 0);
1248 inline void draw_cube(const float radius, PointVertex* cube)
1250 (*cube++).vertex = Vertex3f(-radius, -radius, -radius);
1251 (*cube++).vertex = Vertex3f(radius, -radius, -radius);
1252 (*cube++).vertex = Vertex3f(-radius, radius, -radius);
1253 (*cube++).vertex = Vertex3f(radius, radius, -radius);
1254 (*cube++).vertex = Vertex3f(-radius, -radius, radius);
1255 (*cube++).vertex = Vertex3f(radius, -radius, radius);
1256 (*cube++).vertex = Vertex3f(-radius, radius, radius);
1257 (*cube++).vertex = Vertex3f(radius, radius, radius);
1261 /// \brief Calculates the tangent vectors for a triangle \p a, \p b, \p c and stores the tangent in \p s and the bitangent in \p t.
1262 inline void ArbitraryMeshTriangle_calcTangents(const ArbitraryMeshVertex& a, const ArbitraryMeshVertex& b, const ArbitraryMeshVertex& c, Vector3& s, Vector3& t)
1264 s = Vector3(0, 0, 0);
1265 t = Vector3(0, 0, 0);
1270 Vector3(b.vertex.x, b.texcoord.s, b.texcoord.t),
1271 Vector3(a.vertex.x, a.texcoord.s, a.texcoord.t)
1274 Vector3(c.vertex.x, c.texcoord.s, c.texcoord.t),
1275 Vector3(a.vertex.x, a.texcoord.s, a.texcoord.t)
1280 if(fabs(cross.x()) > 0.000001f)
1282 s.x() = -cross.y() / cross.x();
1285 if(fabs(cross.x()) > 0.000001f)
1287 t.x() = -cross.z() / cross.x();
1295 Vector3(b.vertex.y, b.texcoord.s, b.texcoord.t),
1296 Vector3(a.vertex.y, a.texcoord.s, a.texcoord.t)
1299 Vector3(c.vertex.y, c.texcoord.s, c.texcoord.t),
1300 Vector3(a.vertex.y, a.texcoord.s, a.texcoord.t)
1305 if(fabs(cross.x()) > 0.000001f)
1307 s.y() = -cross.y() / cross.x();
1310 if(fabs(cross.x()) > 0.000001f)
1312 t.y() = -cross.z() / cross.x();
1320 Vector3(b.vertex.z, b.texcoord.s, b.texcoord.t),
1321 Vector3(a.vertex.z, a.texcoord.s, a.texcoord.t)
1324 Vector3(c.vertex.z, c.texcoord.s, c.texcoord.t),
1325 Vector3(a.vertex.z, a.texcoord.s, a.texcoord.t)
1330 if(fabs(cross.x()) > 0.000001f)
1332 s.z() = -cross.y() / cross.x();
1335 if(fabs(cross.x()) > 0.000001f)
1337 t.z() = -cross.z() / cross.x();
1342 inline void ArbitraryMeshTriangle_sumTangents(ArbitraryMeshVertex& a, ArbitraryMeshVertex& b, ArbitraryMeshVertex& c)
1346 ArbitraryMeshTriangle_calcTangents(a, b, c, s, t);
1348 reinterpret_cast<Vector3&>(a.tangent) += s;
1349 reinterpret_cast<Vector3&>(b.tangent) += s;
1350 reinterpret_cast<Vector3&>(c.tangent) += s;
1352 reinterpret_cast<Vector3&>(a.bitangent) += t;
1353 reinterpret_cast<Vector3&>(b.bitangent) += t;
1354 reinterpret_cast<Vector3&>(c.bitangent) += t;