1 | #ifndef __GLRENDERER_H
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2 | #define __GLRENDERER_H
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3 |
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4 | #include "ObjectPvs.h"
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5 | #include "Vector3.h"
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6 | #include "Containers.h"
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7 | #include "Halton.h"
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8 | #include "Renderer.h"
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9 | #include "Beam.h"
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10 |
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11 |
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12 |
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13 | namespace GtpVisibilityPreprocessor {
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14 |
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15 | class SceneGraph;
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16 | class ViewCellsManager;
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17 | class Mesh;
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18 | class MeshInstance;
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19 | class Intersectable;
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20 | class Material;
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21 | class Beam;
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22 | class KdTree;
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23 | class GlRendererBuffer;
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24 | class BeamSampleStatistics;
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25 | class OcclusionQuery;
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26 | class TransformedMeshInstance;
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27 | class TriangleIntersectable;
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28 | class BvhNode;
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29 | class SimpleRayContainer;
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30 |
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31 | struct VssRayContainer;
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32 |
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33 | struct GLUquadric;
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34 |
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35 | struct PvsRenderStatistics {
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36 |
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37 | float maxError;
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38 | float sumError;
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39 | int sumPvsSize;
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40 | int frames;
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41 | int errorFreeFrames;
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42 |
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43 | PvsRenderStatistics() { Reset(); }
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44 |
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45 | void Reset() {
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46 | maxError = 0.0f;
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47 | sumError = 0.0f;
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48 | frames = 0;
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49 | errorFreeFrames = 0;
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50 | sumPvsSize = 0;
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51 | }
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52 |
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53 | float GetMaxError() { return maxError; }
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54 | float GetAvgError() { return sumError/frames; }
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55 | float GetErrorFreeFrames() { return errorFreeFrames/(float)frames; }
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56 | float GetAvgPvs() { return sumPvsSize/(float)frames; }
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57 |
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58 | };
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59 |
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60 | struct PvsCache {
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61 |
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62 | PvsCache():mViewCell(NULL), mUnfilteredPvsSize(0) {}
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63 |
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64 | void Reset()
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65 | {
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66 | mViewCell = NULL; mPvs.Clear();
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67 | filteredBoxes.clear();
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68 | mUnfilteredPvsSize = 0;
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69 | }
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70 |
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71 | ViewCell *mViewCell;
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72 | ObjectPvs mPvs;
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73 | int mUnfilteredPvsSize;
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74 | vector<AxisAlignedBox3> filteredBoxes;
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75 | };
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76 |
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77 |
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78 | struct RenderCostSample {
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79 |
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80 | RenderCostSample() {}
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81 |
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82 | void Reset() {
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83 | mVisibleObjects = 0;
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84 | mVisiblePixels = 0;
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85 | }
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86 |
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87 | Vector3 mPosition;
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88 |
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89 | // visible object from the given point
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90 | int mVisibleObjects;
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91 |
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92 | // visible pixels
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93 | int mVisiblePixels;
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94 |
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95 | ObjectPvs mPvs;
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96 |
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97 | };
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98 |
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99 | /** Class encapsulating gl rendering for the scene.
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100 | There is no gl context binding so the binding is performed in the
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101 | derived classes
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102 | */
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103 | class GlRenderer: public Renderer
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104 | {
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105 | friend class GlobalLinesRenderer;
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106 | friend class ViewCellsManager;
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107 |
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108 | public:
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109 |
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110 | GlRenderer(SceneGraph *sceneGraph,
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111 | ViewCellsManager *viewcells,
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112 | KdTree *tree);
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113 |
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114 | GlRenderer() {}
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115 |
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116 | virtual ~GlRenderer();
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117 |
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118 |
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119 | virtual void RandomViewPoint();
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120 |
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121 | void SetupFalseColor(const unsigned int id);
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122 | void RenderIntersectable(Intersectable *);
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123 | void RenderViewCell(ViewCell *vc);
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124 | void RenderMeshInstance(MeshInstance *mi);
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125 | void RenderTransformedMeshInstance(TransformedMeshInstance *mi);
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126 | void RenderMesh(Mesh *m);
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127 | void SetupMaterial(Material *m);
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128 | virtual void SetupCamera();
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129 |
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130 | void
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131 | RenderRays(const VssRayContainer &rays);
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132 |
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133 | void
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134 | RenderTriangle(TriangleIntersectable *object);
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135 |
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136 | void
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137 | RenderBox(const AxisAlignedBox3 &box);
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138 |
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139 | void
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140 | RenderBvhNode(BvhNode *node);
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141 |
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142 | void
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143 | RenderKdNode(KdNode *node);
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144 |
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145 | bool
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146 | RenderScene();
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147 |
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148 | void
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149 | _RenderScene();
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150 |
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151 | void
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152 | _RenderSceneTriangles();
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153 |
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154 | void _RenderSceneTrianglesWithDrawArrays();
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155 |
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156 | void
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157 | RenderViewPoint();
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158 |
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159 | virtual void
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160 | SetupProjection(const int w, const int h, const float angle = 70.0f);
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161 |
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162 | virtual bool ValidViewPoint();
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163 |
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164 | virtual float
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165 | GetPixelError(int &pvsSize);
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166 |
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167 | virtual void
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168 | EvalPvsStat();
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169 |
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170 | virtual void EvalPvsStat(const SimpleRayContainer &viewPoints);
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171 |
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172 | virtual void InitGL();
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173 |
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174 | virtual int GetWidth() const { return 0; }
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175 | virtual int GetHeight() const { return 0; }
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176 |
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177 | unsigned int GetId(const unsigned char r,
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178 | const unsigned char g,
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179 | const unsigned char b) const;
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180 |
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181 | inline const bool GetSnapErrorFrames() { return mSnapErrorFrames; }
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182 | inline const std::string GetSnapPrefix() { return mSnapPrefix; }
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183 |
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184 | inline void SetSnapErrorFrames(bool snapframes) { mSnapErrorFrames = snapframes; }
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185 | inline void SetSnapPrefix(const std::string &pref) { mSnapPrefix = pref; }
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186 |
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187 | virtual void ClearErrorBuffer();
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188 |
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189 | virtual float GetAvgPixelError() {
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190 | return mPvsStat.GetAvgError()*GetWidth()*GetHeight();
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191 | }
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192 |
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193 | virtual float GetMaxPixelError() {
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194 | return mPvsStat.GetMaxError()*GetWidth()*GetHeight();
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195 | }
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196 |
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197 | public:
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198 |
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199 | int mCurrentFrame;
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200 | int mFrame;
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201 | bool mWireFrame;
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202 |
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203 | PvsRenderStatistics mPvsStat;
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204 |
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205 | int mPvsStatFrames;
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206 | struct PvsErrorEntry {
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207 | PvsErrorEntry() {}
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208 | float mError;
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209 | int mPvsSize;
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210 | Vector3 mPosition;
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211 | Vector3 mDirection;
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212 | };
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213 |
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214 | vector<PvsErrorEntry> mPvsErrorBuffer;
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215 |
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216 | protected:
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217 |
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218 | void CreateVertexArrays();
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219 | void DeleteVbos();
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220 | void EnableDrawArrays();
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221 | void DisableDrawArrays();
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222 |
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223 | void RenderKdLeaf(KdLeaf *leaf);
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224 |
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225 |
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226 | //////////////////
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227 |
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228 | PvsCache mPvsCache;
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229 |
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230 | unsigned int mVboId;
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231 | vector<OcclusionQuery *> mOcclusionQueries;
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232 |
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233 | ObjectContainer mObjects;
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234 |
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235 | Vector3 mViewPoint;
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236 | Vector3 mViewDirection;
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237 |
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238 | int timerId;
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239 | bool mUseFalseColors;
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240 | bool mUseForcedColors;
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241 |
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242 | HaltonSequence halton;
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243 |
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244 |
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245 | bool mDetectEmptyViewSpace;
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246 | bool mSnapErrorFrames;
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247 |
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248 | bool mRenderBoxes;
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249 |
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250 | bool mUseGlLists;
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251 |
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252 | std::string mSnapPrefix;
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253 |
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254 | GLUquadric *mSphere;
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255 |
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256 | KdTree *mKdTree;
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257 |
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258 | Vector3 *mData;
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259 | unsigned int *mIndices;
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260 |
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261 | bool mUseVbos;
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262 | };
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263 |
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264 |
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265 | /* Class implementing an OpenGl render buffer.
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266 | */
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267 | class GlRendererBuffer: public GlRenderer
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268 | {
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269 |
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270 | public:
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271 |
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272 | GlRendererBuffer(SceneGraph *sceneGraph,
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273 | ViewCellsManager *viewcells,
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274 | KdTree *tree);
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275 |
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276 | virtual ~GlRendererBuffer();
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277 |
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278 | /** Evaluates render cost of a point sample.
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279 | @param sample the render cost sample to be evaluated
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280 | @param useOcclusionQueries if occlusion queries should be used or item buffer
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281 | @param threshold number of pixels / samples from where an object is considered visible.
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282 | */
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283 | virtual void EvalRenderCostSample(RenderCostSample &sample,
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284 | const bool useOcclusionQueries,
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285 | const int threshold);
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286 |
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287 | /** Evaluates render cost of a number of point samples. The point samples
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288 | are distributed uniformly over the defined view space.
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289 |
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290 | @param numSamples the number of point samples taken
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291 | @param samples stores the taken point samples in a container
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292 | @param useOcclusionQueries if occlusion queries should be used or item buffer
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293 | @param threshold number of pixels / samples from where an object is considered visible.
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294 | */
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295 | virtual void SampleRenderCost(const int numSamples,
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296 | vector<RenderCostSample> &samples,
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297 | const bool useOcclusionQueries,
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298 | const int threshold = 0);
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299 | /** Implerment in subclasses.
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300 | */
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301 | virtual void EvalPvsStat();
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302 |
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303 | virtual void EvalPvsStat(const SimpleRayContainer &viewPoints);
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304 |
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305 | virtual int GetWidth() const = 0;
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306 | virtual int GetHeight() const = 0;
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307 |
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308 | virtual void MakeCurrent() = 0;
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309 | virtual void DoneCurrent() = 0;
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310 |
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311 | virtual bool ValidViewPoint();
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312 |
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313 | virtual void SampleBeamContributions(
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314 | Intersectable *sourceObject,
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315 | Beam &beam,
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316 | const int samples,
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317 | BeamSampleStatistics &stat
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318 | );
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319 |
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320 | virtual void SampleViewpointContributions(
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321 | Intersectable *sourceObject,
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322 | const Vector3 viewPoint,
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323 | Beam &beam,
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324 | const int desiredSamples,
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325 | BeamSampleStatistics &stat
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326 | );
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327 |
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328 | virtual void InitGL();
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329 | /** Computes rays from information gained with hw sampling-
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330 | */
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331 | virtual void ComputeRays(Intersectable *sourceObj, VssRayContainer &rays);
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332 |
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333 | virtual int ComputePvs() const = 0;
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334 |
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335 | virtual int ComputePvs(ObjectContainer &objects, ObjectContainer &pvs) const = 0;
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336 |
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337 |
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338 | protected:
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339 |
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340 | unsigned int *mPixelBuffer;
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341 |
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342 | static void GenQueries(const int numQueries);
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343 |
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344 | virtual void SetupProjectionForViewPoint(const Vector3 &viewPoint,
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345 | const Beam &beam,
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346 | Intersectable *sourceObject);
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347 | /** Evaluates query for one direction using item buffer.
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348 | */
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349 | virtual void EvalQueryWithItemBuffer();
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350 | /** Evaluates query for one direction using occlusion queries.
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351 | */
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352 | virtual void EvalQueryWithOcclusionQueries();
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353 | };
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354 |
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355 |
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356 | /** Abstract class for implmenenting a gl render widget.
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357 | */
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358 | class GlRendererWidget: public GlRenderer
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359 | {
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360 | public:
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361 |
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362 | GlRendererWidget(SceneGraph *sceneGraph, ViewCellsManager *vcm, KdTree *kdTree):
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363 | GlRenderer(sceneGraph, vcm, kdTree)
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364 | {}
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365 |
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366 | GlRendererWidget() {}
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367 |
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368 | virtual ~GlRendererWidget() {}
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369 |
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370 | virtual void Show() {}
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371 | };
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372 |
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373 |
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374 | };
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375 |
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376 | #endif
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