[373] | 1 | #ifndef _SamplingPreprocessor_H__ |
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| 2 | #define _SamplingPreprocessor_H__ |
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| 3 | |
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| 4 | #include <fstream> |
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| 5 | using namespace std; |
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| 6 | |
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| 7 | #include "Preprocessor.h" |
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| 8 | |
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| 9 | |
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| 10 | /** Sampling based visibility preprocessing. The implementation is based on heuristical |
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| 11 | sampling of view space */ |
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| 12 | class SamplingPreprocessor : public Preprocessor { |
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| 13 | public: |
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| 14 | |
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| 15 | SamplingPreprocessor(); |
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| 16 | |
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| 17 | ~SamplingPreprocessor(); |
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| 18 | |
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| 19 | virtual bool ComputeVisibility(); |
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| 20 | |
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| 21 | protected: |
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| 22 | int mPass; |
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| 23 | |
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| 24 | int mSamplesPerPass; |
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| 25 | int mTotalSamples; |
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| 26 | int mKdPvsDepth; |
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| 27 | ofstream mStats; |
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| 28 | ObjectContainer mObjects; |
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| 29 | RayContainer mSampleRays; |
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| 30 | int mBspConstructionSamples; |
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| 31 | int mPostProcessSamples; |
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[390] | 32 | int mVisualizationSamples; |
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[373] | 33 | |
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| 34 | void |
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| 35 | SetupRay(Ray &ray, |
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| 36 | const Vector3 &point, |
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| 37 | const Vector3 &direction, |
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| 38 | const int type); |
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| 39 | |
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| 40 | KdNode * |
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| 41 | GetNodeForPvs(KdLeaf *leaf); |
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| 42 | |
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| 43 | int |
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| 44 | AddNodeSamples(const Ray &ray, |
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| 45 | Intersectable *sObject, |
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| 46 | Intersectable *tObject |
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| 47 | ); |
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| 48 | |
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| 49 | void |
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| 50 | HoleSamplingPass(); |
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| 51 | |
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| 52 | int |
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| 53 | CastRay(Intersectable *object, |
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| 54 | Ray &ray); |
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| 55 | |
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| 56 | KdNode * |
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| 57 | GetNodeToSample(Intersectable *object); |
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| 58 | void |
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| 59 | VerifyVisibility(Intersectable *object); |
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| 60 | |
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| 61 | int |
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| 62 | CastEdgeSamples( |
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| 63 | Intersectable *object, |
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| 64 | const Vector3 &point, |
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| 65 | MeshInstance *mi, |
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| 66 | const int samples |
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| 67 | ); |
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| 68 | |
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| 69 | /** Processes the BSP based view cells during a pass. |
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| 70 | |
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| 71 | @param ray the current ray |
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| 72 | @param object the currently processed object |
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| 73 | @param faceIndex the sampled face of the object |
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| 74 | @param contributingSamples samples contributing to pvs |
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| 75 | @param sampleContributions contribution of the samples |
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| 76 | */ |
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[392] | 77 | void ProcessBspViewCells(const Ray &ray, |
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[373] | 78 | Intersectable *object, |
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[392] | 79 | const int faceIndex, |
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[373] | 80 | int &contributingSamples, |
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| 81 | int &sampleContributions); |
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| 82 | |
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| 83 | /** Adds objects samples to bsp view cells. |
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| 84 | */ |
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| 85 | int AddObjectSamples(Intersectable *obj, const Ray &ray); |
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| 86 | |
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| 87 | bool BuildBspTree(); |
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| 88 | |
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| 89 | void ExportSplits(const ObjectContainer &objects); |
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| 90 | |
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| 91 | void ExportBspPvs(const ObjectContainer &objects); |
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| 92 | |
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| 93 | /** Post processes view cells (i.e., merges or subdivides view cells based |
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| 94 | on the PVS and the ray sets. |
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| 95 | @param rays a set of rays which carries the visibility information |
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| 96 | the merging / subdivision is based on. |
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| 97 | @returns number of merged view cells. |
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| 98 | */ |
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| 99 | int PostprocessViewCells(const RayContainer &rays); |
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| 100 | }; |
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| 101 | |
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| 102 | #endif |
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