1 | #include "RenderTraverser.h"
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2 | #include "glInterface.h"
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3 | #include "Camera.h"
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4 | #include "SceneEntity.h"
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5 | #include "RenderState.h"
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6 | #include "Geometry.h"
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7 | #include "Timer/PerfTimer.h"
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8 |
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9 |
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10 | using namespace std;
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11 |
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12 |
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13 | namespace CHCDemoEngine
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14 | {
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15 |
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16 |
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17 | void TraversalStatistics::Reset()
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18 | {
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19 | mNumTraversedNodes = 0;
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20 | mNumQueryCulledNodes = 0;
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21 | mNumFrustumCulledNodes = 0;
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22 |
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23 | mNumRenderedGeometry = 0;
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24 | mNumRenderedTriangles = 0;
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25 | mNumRenderedNodes = 0;
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26 |
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27 | mNumIssuedQueries = 0;
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28 | mNumStateChanges = 0;
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29 | mNumBatches = 0;
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30 |
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31 | mWaitTime = 0;
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32 | mQueryTime = 0;
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33 | mRestTime = 0;
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34 | }
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35 |
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36 |
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37 |
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38 | /******************************************************/
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39 | /* RenderTraverser implementation */
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40 | /******************************************************/
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41 |
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42 |
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43 | RenderTraverser::RenderTraverser():
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44 | mVisibilityThreshold(0),
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45 | mBvh(NULL),
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46 | mUseOptimization(false),
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47 | mFrameId(-1),
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48 | mUseRenderQueue(false),
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49 | mAssumedVisibleFrames(10),
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50 | mMaxBatchSize(50),
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51 | mUseTightBounds(false),
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52 | mShowBounds(false),
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53 | mRenderQueue(NULL),
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54 | mMaxVisibleDistance(.0f)
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55 | {
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56 | }
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57 |
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58 |
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59 | RenderTraverser::~RenderTraverser()
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60 | {
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61 | mQueryHandler.DestroyQueries();
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62 | }
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63 |
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64 |
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65 | void RenderTraverser::EnqueueNode(BvhNode *node)
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66 | {
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67 | mBvh->UpdateDistance(node);
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68 | mDistanceQueue.push(node);
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69 | }
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70 |
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71 |
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72 | void RenderTraverser::TraverseNode(BvhNode *node)
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73 | {
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74 | ++ mStats.mNumTraversedNodes;
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75 |
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76 | if (node->IsVirtualLeaf())
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77 | {
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78 | RenderNode(node);
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79 |
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80 | if (mShowBounds)
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81 | mBvh->RenderBoundsForViz(node, mRenderState, mUseTightBounds);
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82 | }
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83 | else
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84 | {
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85 | BvhInterior *interior = static_cast<BvhInterior *>(node);
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86 |
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87 | EnqueueNode(interior->GetFront());
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88 | EnqueueNode(interior->GetBack());
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89 | }
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90 | }
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91 |
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92 |
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93 | void RenderTraverser::RenderNode(BvhNode *node)
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94 | {
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95 | // test if node was already rendered in this frame
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96 | if (node->GetLastRenderedFrame() != mFrameId)
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97 | {
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98 | if (mRenderState->SetMode(RenderState::RENDER))
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99 | ++ mStats.mNumStateChanges;
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100 |
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101 | node->SetLastRenderedFrame(mFrameId);
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102 |
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103 | int geometrySize;
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104 | SceneEntity **entities = mBvh->GetGeometry(node, geometrySize);
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105 |
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106 | mStats.mNumRenderedGeometry += geometrySize;
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107 | ++ mStats.mNumRenderedNodes;
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108 |
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109 | for (int i = 0; i < geometrySize; ++ i)
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110 | {
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111 | SceneEntity *ent = entities[i];
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112 |
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113 | mStats.mNumRenderedTriangles += ent->CountNumTriangles();
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114 |
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115 | if (mUseRenderQueue)
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116 | mRenderQueue->Enqueue(ent);
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117 | else
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118 | ent->Render(mRenderState);
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119 |
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120 | // store the visible entities for rendering in the second pass
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121 | if (mUseDepthPass) mVisibleObjects.push_back(ent);
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122 | }
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123 |
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124 | // store the max distance in the scene for later use
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125 | float maxDist = mBvh->CalcMaxDistance(node);
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126 |
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127 | if (maxDist > mMaxVisibleDistance)
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128 | mMaxVisibleDistance = maxDist;
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129 | }
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130 | }
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131 |
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132 |
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133 | void RenderTraverser::SetHierarchy(Bvh *bvh)
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134 | {
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135 | mBvh = bvh;
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136 | }
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137 |
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138 |
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139 | void RenderTraverser::SetRenderState(RenderState *state)
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140 | {
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141 | mRenderState = state;
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142 | }
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143 |
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144 |
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145 | void RenderTraverser::RenderScene()
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146 | {
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147 | mVisibleObjects.clear();
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148 | mMaxVisibleDistance = .0f;
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149 |
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150 | ++ mFrameId;
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151 |
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152 | mBvh->InitFrame(mCamera, mRenderState);
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153 |
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154 | mStats.Reset();
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155 | mQueryHandler.ResetQueries();
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156 |
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157 | // add root node to queue
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158 | EnqueueNode(mBvh->GetRoot());
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159 |
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160 |
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161 | ///////////
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162 | //-- the actual rendering algorithm
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163 |
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164 | Traverse();
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165 |
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166 | // render the contents of the render queue
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167 | if (mUseRenderQueue) ApplyRenderQueue();
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168 |
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169 | // reset the render state
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170 | mRenderState->Reset();
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171 | }
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172 |
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173 |
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174 | void RenderTraverser::SetUseRenderQueue(bool useRenderQueue)
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175 | {
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176 | mUseRenderQueue = useRenderQueue;
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177 | //std::cout << "using render queue: " << mUseRenderQueue << std::endl;
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178 | }
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179 |
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180 |
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181 | void RenderTraverser::SetUseDepthPass(bool b)
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182 | {
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183 | mUseDepthPass = b;
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184 | }
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185 |
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186 |
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187 | void RenderTraverser::SetVisibilityThreshold(int threshold)
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188 | {
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189 | mVisibilityThreshold = threshold;
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190 | }
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191 |
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192 |
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193 | void RenderTraverser::SetUseOptimization(bool useOptimization)
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194 | {
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195 | mUseOptimization = useOptimization;
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196 | //cout << "using optimization: " << mUseOptimization << endl;
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197 | }
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198 |
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199 |
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200 | void RenderTraverser::SetAssumedVisibleFrames(int assumedVisibleFrames)
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201 | {
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202 | mAssumedVisibleFrames = assumedVisibleFrames;
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203 | }
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204 |
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205 |
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206 | void RenderTraverser::SetMaxBatchSize(int batchSize)
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207 | {
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208 | mMaxBatchSize = batchSize;
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209 | }
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210 |
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211 |
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212 | void RenderTraverser::SetUseMultiQueries(bool useMultiQueries)
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213 | {
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214 | mUseMultiQueries = useMultiQueries;
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215 | //cout << "using multiqueries: " << mUseMultiQueries << endl;
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216 | }
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217 |
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218 |
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219 | void RenderTraverser::SetShowBounds(bool showBounds)
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220 | {
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221 | mShowBounds = showBounds;
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222 | }
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223 |
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224 |
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225 | void RenderTraverser::SetUseTightBounds(bool useTightBounds)
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226 | {
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227 | mUseTightBounds = useTightBounds;
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228 | //cout << "using tight bounds: " << useTightBounds << endl;
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229 | }
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230 |
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231 |
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232 | OcclusionQuery *RenderTraverser::IssueOcclusionQuery(BvhNode *node)
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233 | {
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234 | OcclusionQuery *query = mQueryHandler.RequestQuery();
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235 | query->AddNode(node);
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236 |
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237 | IssueOcclusionQuery(*query);
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238 |
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239 | return query;
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240 | }
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241 |
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242 |
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243 | void RenderTraverser::IssueOcclusionQuery(const OcclusionQuery &query)
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244 | {
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245 | ++ mStats.mNumIssuedQueries;
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246 |
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247 | // render pending objects before changing to query mode
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248 | if (mUseRenderQueue && (mRenderState->GetMode() == RenderState::RENDER))
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249 | {
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250 | ApplyRenderQueue();
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251 | }
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252 |
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253 | query.BeginQuery();
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254 |
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255 | // change to query mode and render box
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256 | if (mRenderState->SetMode(RenderState::QUERY))
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257 | {
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258 | ++ mStats.mNumStateChanges;
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259 | }
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260 |
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261 | mBvh->RenderBounds(query.GetNodes(), mRenderState, mUseTightBounds);
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262 |
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263 | query.EndQuery();
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264 | }
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265 |
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266 |
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267 | void RenderTraverser::ApplyRenderQueue()
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268 | {
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269 | if (mRenderState->SetMode(RenderState::RENDER))
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270 | ++ mStats.mNumStateChanges;
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271 |
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272 | if (mRenderQueue->GetSize() > 0)
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273 | {
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274 | ++ mStats.mNumBatches;
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275 | mRenderQueue->Apply();
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276 | }
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277 | }
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278 |
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279 |
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280 | }
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