[59] | 1 | #include "CoherentHierarchicalCullingManager.h" |
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[94] | 2 | #include <OgreLogManager.h> |
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[59] | 3 | |
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| 4 | namespace GtpVisibility { |
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| 5 | |
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| 6 | //----------------------------------------------------------------------- |
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| 7 | void CoherentHierarchicalCullingManager::RenderScene() |
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| 8 | { |
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[111] | 9 | //InitFrame(); |
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[85] | 10 | QueryQueue queryQueue; |
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[86] | 11 | unsigned int visiblePixels = 0; |
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| 12 | bool isAvailable = false; |
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[87] | 13 | |
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[59] | 14 | //-- PART 1: process finished occlusion queries |
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| 15 | while (!mHierarchyInterface->GetQueue()->empty() || !queryQueue.empty()) |
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| 16 | { |
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| 17 | while (!queryQueue.empty() && |
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[86] | 18 | queryQueue.front().second->GetQueryResult(visiblePixels, |
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| 19 | mHierarchyInterface->GetQueue()->empty())) |
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[59] | 20 | { |
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[94] | 21 | HierarchyNode *node = queryQueue.front().first; |
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[86] | 22 | |
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[59] | 23 | queryQueue.pop(); |
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| 24 | |
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[96] | 25 | if (visiblePixels > mVisibilityThreshold) |
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[59] | 26 | { |
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| 27 | mHierarchyInterface->PullUpVisibility(node); |
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| 28 | mHierarchyInterface->TraverseNode(node); |
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| 29 | } |
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| 30 | else |
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[112] | 31 | { //if (mHierarchyInterface->mIsShadowPass) |
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[59] | 32 | mNumQueryCulledNodes ++; |
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[112] | 33 | |
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| 34 | if(mVisualizeCulledNodes) |
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| 35 | { |
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| 36 | mHierarchyInterface->VisualizeCulledNode(node, QUERY_CULLED); |
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| 37 | } |
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[59] | 38 | } |
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[85] | 39 | } |
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[87] | 40 | |
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[59] | 41 | //-- PART 2: hierarchical traversal |
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| 42 | if (!mHierarchyInterface->GetQueue()->empty()) |
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| 43 | { |
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| 44 | HierarchyNode *node = mHierarchyInterface->GetQueue()->top(); |
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| 45 | mHierarchyInterface->GetQueue()->pop(); |
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| 46 | |
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| 47 | bool intersects = false; |
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| 48 | |
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[74] | 49 | if (!mHierarchyInterface->CheckFrustumVisible(node, intersects)) |
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[112] | 50 | {//if (mHierarchyInterface->mIsShadowPass) |
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[59] | 51 | mNumFrustumCulledNodes ++; |
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[112] | 52 | |
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| 53 | if(mVisualizeCulledNodes) |
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| 54 | { |
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[113] | 55 | mHierarchyInterface->VisualizeCulledNode(node, FRUSTUM_CULLED); |
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[112] | 56 | } |
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[59] | 57 | } |
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[74] | 58 | else |
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[59] | 59 | { |
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[74] | 60 | // if intersects near plane => skip occlusion query because wrong results possible |
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| 61 | if (intersects) |
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| 62 | { |
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| 63 | // update octant's visited flag |
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| 64 | mHierarchyInterface->SetLastVisited(node, mHierarchyInterface->GetFrameId()); |
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[59] | 65 | |
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[74] | 66 | mHierarchyInterface->PullUpVisibility(node); |
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| 67 | mHierarchyInterface->TraverseNode(node); |
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[59] | 68 | |
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[74] | 69 | continue; |
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| 70 | } |
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[59] | 71 | |
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[74] | 72 | // identify previously visible nodes |
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| 73 | bool wasVisible = mHierarchyInterface->IsNodeVisible(node) && |
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| 74 | (mHierarchyInterface->LastVisited(node) == mHierarchyInterface->GetFrameId() - 1); |
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[59] | 75 | |
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[74] | 76 | // identify nodes that we cannot skip queries for |
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[87] | 77 | // geometry not only in leaves => test for renderable geometry |
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| 78 | bool issueQuery = !wasVisible || mHierarchyInterface->HasGeometry(node); |
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[95] | 79 | |
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[74] | 80 | // reset node's visibility classification |
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| 81 | mHierarchyInterface->SetNodeVisible(node, false); |
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[59] | 82 | |
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[74] | 83 | // update node's visited flag |
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| 84 | mHierarchyInterface->SetLastVisited(node, mHierarchyInterface->GetFrameId()); |
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[59] | 85 | |
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[87] | 86 | // skip testing previously visible nodes without geometry |
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| 87 | if (issueQuery) |
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[74] | 88 | { |
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[87] | 89 | mNumQueriesIssued ++; |
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| 90 | |
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| 91 | queryQueue.push(QueryPair(node, mHierarchyInterface-> |
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| 92 | IssueOcclusionQuery(node, wasVisible))); |
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[74] | 93 | } |
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[59] | 94 | |
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[74] | 95 | // always traverse a node if it was visible |
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| 96 | if (wasVisible) |
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| 97 | { |
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| 98 | mHierarchyInterface->TraverseNode(node); |
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| 99 | } |
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[59] | 100 | } |
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| 101 | } |
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| 102 | } |
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| 103 | } |
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| 104 | |
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| 105 | } // namespace GtpVisibility |
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