[440] | 1 | #ifndef _ViewCellsManager_H__
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| 2 | #define _ViewCellsManager_H__
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| 3 |
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| 4 | #include "Ray.h"
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| 5 | #include "VssRay.h"
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| 6 | #include "Containers.h"
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[475] | 7 | #include "ViewCell.h"
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[440] | 8 |
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| 9 | class ViewCell;
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| 10 | class Intersectable;
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| 11 | class RenderSimulator;
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[480] | 12 | class Renderer;
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[440] | 13 | class Mesh;
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| 14 | struct Triangle3;
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| 15 | class SimulationStatistics;
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| 16 | class BspTree;
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| 17 | class KdTree;
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| 18 | class VspKdTree;
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| 19 | class VspBspTree;
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| 20 | class KdNode;
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| 21 | class KdLeaf;
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| 22 | class VspKdTree;
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| 23 | class AxisAlignedBox3;
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[448] | 24 | class BspLeaf;
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[475] | 25 | class ViewCellsStatistics;
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[482] | 26 | class Exporter;
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[475] | 27 | struct BspRay;
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| 28 |
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[440] | 29 | /**
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| 30 | Manages different higher order operations on the view cells.
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| 31 | */
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| 32 | class ViewCellsManager
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| 33 | {
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| 34 |
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| 35 | public:
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[467] | 36 | struct PvsStatistics {
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| 37 | int minPvs;
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| 38 | int maxPvs;
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| 39 | float avgPvs;
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| 40 | int viewcells;
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| 41 | };
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[466] | 42 |
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| 43 | /// view cell container types
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| 44 | enum {BSP, KD, VSP_KD, VSP_BSP};
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| 45 |
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[440] | 46 | /** Constructor taking the maximal number of samples used for construction
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| 47 | */
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| 48 | ViewCellsManager(const int constructionSamples);
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| 49 |
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| 50 | ViewCellsManager();
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| 51 |
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[462] | 52 | virtual ~ViewCellsManager();
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[440] | 53 |
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| 54 | /** Constructs view cell container with a given number of samples.
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| 55 | */
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| 56 | virtual int Construct(const ObjectContainer &objects,
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[487] | 57 | const VssRayContainer &rays) = 0;
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[440] | 58 |
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[441] | 59 | /** Computes sample contributions of the rays to the view cells PVS.
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| 60 |
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| 61 | @param rays bundle of rays used to find intersections with view cells and
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| 62 | adding the contribution
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| 63 | @param castRays true if ray should be cast to gain the information, false if rays
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| 64 | already hold the view cells intersection information and need not be recast.
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| 65 | @param sampleContributions returns the number of sample contributions
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| 66 | @param contributingSamples returns the number of contributingSamples
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[440] | 67 | */
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[475] | 68 | void ComputeSampleContributions(const VssRayContainer &rays);
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[440] | 69 |
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[441] | 70 |
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[475] | 71 | /** Computes sample contribution of a simgle ray to the view cells PVS.
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| 72 | @param ray finds intersections with view cells and holds the contribution
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| 73 | @param castRay true if ray should be cast to gain the information, false if ray
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| 74 | is already holding the information and need not be recast.
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[466] | 75 |
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[475] | 76 | @returns number of sample contributions
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| 77 | */
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| 78 | virtual void ComputeSampleContributions(VssRay &ray);
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[466] | 79 |
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[452] | 80 | /** Prints out statistics of the view cells.
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| 81 | */
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[475] | 82 | virtual void PrintStatistics(ostream &s) const;
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[452] | 83 |
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[440] | 84 | /** Post processes view cells givemŽa number of rays.
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| 85 | */
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[475] | 86 | virtual int PostProcess(const ObjectContainer &objects,
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| 87 | const VssRayContainer &rays) = 0;
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[440] | 88 |
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| 89 | /** Show visualization of the view cells.
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| 90 | */
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| 91 | virtual void Visualize(const ObjectContainer &objects,
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[466] | 92 | const VssRayContainer &sampleRays) = 0;
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[440] | 93 |
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| 94 | /** type of the view cell container.
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| 95 | */
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| 96 | virtual int GetType() const = 0;
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| 97 |
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[463] | 98 | /** Load the input viewcells. The input viewcells should be given as a collection
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| 99 | of meshes. Each mesh is assume to form a bounded polyhedron defining the interior of
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| 100 | the viewcell. The method then builds a BSP tree of these view cells.
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| 101 |
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| 102 | @param filename file to load
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| 103 | @return true on success
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| 104 | */
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[440] | 105 | bool LoadViewCells(const string filename);
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| 106 |
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| 107 | /** Constructs view cell from base triangle. The ViewCell is extruded along the normal vector.
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| 108 | @param the base triangle
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| 109 | @param the height of the newly created view cell
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| 110 | */
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| 111 | ViewCell *ExtrudeViewCell(const Triangle3 &baseTri, const float height) const;
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| 112 |
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| 113 | /** Merges two view cells.
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| 114 | @note the piercing rays of the front and back will be ordered
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| 115 | @returns new view cell based on the merging.
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| 116 | */
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[441] | 117 | ViewCell *MergeViewCells(ViewCell &front, ViewCell &back) const;
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[440] | 118 |
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| 119 | /** Generates view cell of type specified by this manager
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| 120 | */
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| 121 | virtual ViewCell *GenerateViewCell(Mesh *mesh = NULL) const;
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| 122 |
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| 123 | /** Adds a new view cell to the list of predefined view cells.
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| 124 | */
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| 125 | void AddViewCell(ViewCell *viewCell);
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| 126 |
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| 127 | /** Derive view cells from objects.
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| 128 | */
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| 129 | void DeriveViewCells(const ObjectContainer &objects,
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| 130 | ViewCellContainer &viewCells,
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| 131 | const int maxViewCells) const;
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| 132 |
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| 133 | /** Sets maximal number of samples used for the
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| 134 | construction of the view cells.
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| 135 | */
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| 136 | void SetVisualizationSamples(const int visSamples);
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| 137 |
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| 138 | /** Sets maximal number of samples used for the visualization of the view cells.
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| 139 | */
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| 140 | void SetConstructionSamples(const int constructionSamples);
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| 141 |
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| 142 | /** Sets maximal number of samples used for the post processing of the view cells.
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| 143 | */
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| 144 | void SetPostProcessSamples(const int postProcessingSamples);
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| 145 |
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| 146 | /** See set.
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| 147 | */
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| 148 | int GetVisualizationSamples() const;
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| 149 |
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| 150 | /** See set.
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| 151 | */
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| 152 | int GetConstructionSamples() const;
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| 153 |
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| 154 | /** See set.
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| 155 | */
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| 156 | int GetPostProcessSamples() const;
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| 157 |
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| 158 | /** Returns true if view cells wer already constructed.
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| 159 | */
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| 160 | virtual bool ViewCellsConstructed() const = 0;
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[441] | 161 |
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[477] | 162 | /** cast line segment to get a list of unique viewcells which are intersected
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| 163 | by this line segment
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| 164 | */
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[466] | 165 |
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[477] | 166 | virtual int CastLineSegment(const Vector3 &origin,
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[466] | 167 | const Vector3 &termination,
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| 168 | ViewCellContainer &viewcells
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| 169 | ) = 0;
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| 170 |
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[477] | 171 | virtual void GetPvsStatistics(PvsStatistics &stat);
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[466] | 172 |
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[492] | 173 | /** Get a viewcell containing the specified point */
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| 174 | virtual ViewCell *GetViewCell(const Vector3 &point) = 0;
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| 175 |
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| 176 | virtual void
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| 177 | PrintPvsStatistics(ostream &s);
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[467] | 178 |
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[477] | 179 | /** Returns probability that view point lies in one view cell.
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| 180 | */
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| 181 | virtual float GetProbability(ViewCell *viewCell) = 0;
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[468] | 182 |
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[477] | 183 | /** Returns render cost of a single view cell given the render cost of an object.
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| 184 | */
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| 185 | virtual float GetRendercost(ViewCell *viewCell, float objRendercost) const = 0;
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[468] | 186 |
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[477] | 187 | /** Returns vector of loaded / generated view cells.
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| 188 | */
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| 189 | ViewCellContainer &GetViewCells();
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[468] | 190 |
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[485] | 191 | /** Helper function used to split ray sets uniformly
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| 192 | into one that is currently used and the other that
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| 193 | is saved for later processing.
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| 194 | @param sourceRays the input ray set
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| 195 | @param maxSize the maximal number of rays that will be used
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| 196 | @param usedRays returns the used ray set
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| 197 | @param savedRays if not null, returns the saved ray set
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[477] | 198 | */
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| 199 | void GetRaySets(const VssRayContainer &sourceRays,
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[485] | 200 | const int maxSize,
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| 201 | VssRayContainer &usedRays,
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| 202 | VssRayContainer *savedRays = NULL) const;
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| 203 |
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[480] | 204 | /** Returns accumulated area of all view cells.
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| 205 | */
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| 206 | float GetAccVcArea();
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[470] | 207 |
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[480] | 208 | /** Returns area of one view cell.
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| 209 | */
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| 210 | virtual float GetArea(ViewCell *viewCell) const;
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[470] | 211 |
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[480] | 212 | /** Returns volume of view cells.
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| 213 | */
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| 214 | virtual float GetVolume(ViewCell *viewCell) const;
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[470] | 215 |
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[480] | 216 | virtual AxisAlignedBox3 GetSceneBbox() const = 0;
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[477] | 217 |
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[480] | 218 | /** Sets the current renderer mainly for view cells statistics.
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| 219 | */
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| 220 | void SetRenderer(Renderer *renderer);
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| 221 |
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[487] | 222 | /** Computes a (random) view point in the valid view space.
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| 223 | @returns true if valid view point was found
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| 224 | */
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| 225 | virtual bool GetViewPoint(Vector3 &viewPoint) const;
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| 226 |
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[490] | 227 | /** Returns true if this view point is in the valid view space.
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| 228 | */
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| 229 | virtual bool ViewPointValid(const Vector3 &viewPoint) const;
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| 230 |
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[487] | 231 | /** Sets a view space boundary.
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| 232 | */
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| 233 | void SetViewSpaceBox(const AxisAlignedBox3 &box);
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| 234 |
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| 235 |
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[469] | 236 | protected:
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[480] | 237 |
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[482] | 238 | void ParseEnvironment();
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| 239 |
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[480] | 240 | /** Recollects view cells and resets statistics.
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| 241 | */
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| 242 | void ResetViewCells();
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[482] | 243 |
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[480] | 244 | /** Collects the view cells in the view cell container.
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| 245 | */
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| 246 | virtual void CollectViewCells() = 0;
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[482] | 247 |
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[479] | 248 | /** Evaluates view cells statistics and stores it in
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| 249 | mViewCellsStatistics.
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| 250 | */
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| 251 | void EvaluateViewCellsStats();
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[482] | 252 |
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| 253 |
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| 254 | //-- helper functions for view cell visualization
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| 255 |
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| 256 | /** Exports the view cell partition.
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| 257 | */
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| 258 | void ExportViewCells(Exporter *exporter) const;
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| 259 |
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| 260 | /** Sets exporter color.
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| 261 | */
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| 262 | virtual void ExportColor(Exporter *exporter, ViewCell *vc) const = 0;
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| 263 |
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| 264 | /** Exports view cell geometry.
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| 265 | */
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[485] | 266 | virtual void ExportVcGeometry(Exporter *exporter, ViewCell *vc) const = 0;
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[482] | 267 |
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[489] | 268 | /// the view cell corresponding to space ouside the valid view space
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| 269 | //ViewCell *mOutOfBoundsCell;
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[440] | 270 |
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[480] | 271 | /// Renders the view cells.
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| 272 | Renderer *mRenderer;
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[440] | 273 |
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| 274 | /// Loaded view cells
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[469] | 275 | ViewCellContainer mViewCells;
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[440] | 276 |
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| 277 | /// maximum number of samples taken for construction of the view cells
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| 278 | int mConstructionSamples;
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| 279 | int mPostProcessSamples;
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| 280 | int mVisualizationSamples;
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[441] | 281 |
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[463] | 282 | //-- thresholds used for view cells merge
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| 283 | int mMinPvsDif;
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| 284 | int mMinPvs;
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[441] | 285 | int mMaxPvs;
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[470] | 286 |
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| 287 | float mTotalAreaValid;
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| 288 | float mTotalArea;
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[475] | 289 |
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| 290 | ViewCellsStatistics mViewCellsStats;
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[487] | 291 | /// the scene bounding box
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| 292 | AxisAlignedBox3 mSceneBox;
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| 293 |
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| 294 | //-- visualization options
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| 295 |
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| 296 | /// color code for view cells
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| 297 | int mColorCode;
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| 298 | bool mExportGeometry;
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| 299 | bool mExportRays;
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[440] | 300 | };
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| 301 |
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[441] | 302 |
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| 303 |
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[440] | 304 | /**
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| 305 | Manages different higher order operations on the view cells.
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| 306 | */
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| 307 | class BspViewCellsManager: public ViewCellsManager
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| 308 | {
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| 309 |
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| 310 | public:
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[485] | 311 | /** Constructor taking the bsp tree and the number of samples
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| 312 | used to construct the bsp tree.
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| 313 | */
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[440] | 314 | BspViewCellsManager(BspTree *tree, int constructionSamples);
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| 315 |
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[477] | 316 | ~BspViewCellsManager();
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| 317 |
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[440] | 318 | int Construct(const ObjectContainer &objects,
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[487] | 319 | const VssRayContainer &rays);
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[440] | 320 |
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| 321 |
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| 322 | int PostProcess(const ObjectContainer &objects,
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[466] | 323 | const VssRayContainer &rays);
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[440] | 324 |
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| 325 | void Visualize(const ObjectContainer &objects,
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[466] | 326 | const VssRayContainer &sampleRays);
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[440] | 327 |
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| 328 | int GetType() const;
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| 329 |
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| 330 | ViewCell *GenerateViewCell(Mesh *mesh = NULL) const;
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| 331 |
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| 332 | bool ViewCellsConstructed() const;
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| 333 |
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[475] | 334 | //void PrintStatistics(ostream &s) const;
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[452] | 335 |
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[468] | 336 | int CastLineSegment(const Vector3 &origin,
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| 337 | const Vector3 &termination,
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| 338 | ViewCellContainer &viewcells);
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| 339 |
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[471] | 340 | float GetProbability(ViewCell *viewCell);
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[469] | 341 | float GetRendercost(ViewCell *viewCell, float objRendercost) const;
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[466] | 342 |
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[477] | 343 | AxisAlignedBox3 GetSceneBbox() const;
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| 344 |
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[492] | 345 | /** Get a viewcell containing the specified point */
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[502] | 346 | ViewCell *GetViewCell(const Vector3 &point);
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[492] | 347 |
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[440] | 348 | protected:
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| 349 |
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[480] | 350 | void CollectViewCells();
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| 351 |
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[441] | 352 | /** Merges view cells front and back leaf view cell.
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| 353 | */
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| 354 | bool MergeBspLeafViewCells(BspLeaf *front, BspLeaf *back) const;
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[440] | 355 |
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[441] | 356 | /** Returns true if front and back leaf should be merged.
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| 357 | */
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| 358 | bool ShouldMerge(BspLeaf *front, BspLeaf *back) const;
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| 359 |
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[477] | 360 | void ConstructBspRays(const VssRayContainer &rays,
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| 361 | const int numSamples);
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[482] | 362 |
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| 363 | void ExportColor(Exporter *exporter, ViewCell *vc) const;
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[485] | 364 | void ExportVcGeometry(Exporter *exporter, ViewCell *vc) const;
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[482] | 365 |
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[440] | 366 | /// the BSP tree.
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| 367 | BspTree *mBspTree;
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[475] | 368 |
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| 369 | vector<BspRay *> mBspRays;
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[440] | 370 |
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| 371 | private:
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| 372 |
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| 373 | /** Exports visualization of the BSP splits.
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| 374 | */
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[477] | 375 | void ExportSplits(const ObjectContainer &objects);
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[440] | 376 |
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| 377 | /** Exports visualization of the BSP PVS.
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| 378 | */
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[477] | 379 | void ExportBspPvs(const ObjectContainer &objects);
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[440] | 380 |
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| 381 | };
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| 382 |
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| 383 | /**
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| 384 | Manages different higher order operations on the KD type view cells.
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| 385 | */
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| 386 | class KdViewCellsManager: public ViewCellsManager
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| 387 | {
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| 388 |
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| 389 | public:
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| 390 |
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| 391 | KdViewCellsManager(KdTree *tree);
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| 392 |
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| 393 | int Construct(const ObjectContainer &objects,
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[487] | 394 | const VssRayContainer &rays);
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[440] | 395 |
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[478] | 396 | int CastLineSegment(const Vector3 &origin,
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| 397 | const Vector3 &termination,
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| 398 | ViewCellContainer &viewcells);
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[440] | 399 |
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| 400 | int PostProcess(const ObjectContainer &objects,
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[466] | 401 | const VssRayContainer &rays);
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[440] | 402 |
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| 403 | void Visualize(const ObjectContainer &objects,
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[466] | 404 | const VssRayContainer &sampleRays);
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[440] | 405 |
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| 406 | int GetType() const;
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| 407 |
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| 408 | bool ViewCellsConstructed() const;
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| 409 |
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| 410 |
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[452] | 411 | /** Prints out statistics of this approach.
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| 412 | */
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[492] | 413 | // virtual void PrintStatistics(ostream &s) const;
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| 414 | ViewCell *GetViewCell(const Vector3 &point) { return NULL; }
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[452] | 415 |
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[492] | 416 | float GetProbability(ViewCell *viewCell);
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| 417 | float GetRendercost(ViewCell *viewCell, float objRendercost) const;
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| 418 |
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| 419 | AxisAlignedBox3 GetSceneBbox() const;
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[468] | 420 |
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[440] | 421 | protected:
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| 422 |
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[480] | 423 | void CollectViewCells();
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| 424 | KdNode *GetNodeForPvs(KdLeaf *leaf);
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[440] | 425 |
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[482] | 426 | void ExportColor(Exporter *exporter, ViewCell *vc) const;
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[485] | 427 | void ExportVcGeometry(Exporter *exporter, ViewCell *vc) const;
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[440] | 428 |
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[480] | 429 | /// the BSP tree.
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| 430 | KdTree *mKdTree;
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[440] | 431 |
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[480] | 432 | /// depth of the KD tree nodes with represent the view cells
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| 433 | int mKdPvsDepth;
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[440] | 434 | };
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| 435 |
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| 436 | /**
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| 437 | Manages different higher order operations on the view cells
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| 438 | for vsp kd tree view cells.
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| 439 | */
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| 440 | class VspKdViewCellsManager: public ViewCellsManager
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| 441 | {
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| 442 |
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| 443 | public:
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| 444 |
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| 445 | VspKdViewCellsManager(VspKdTree *vspKdTree, int constructionSamples);
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| 446 |
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| 447 | int Construct(const ObjectContainer &objects,
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[487] | 448 | const VssRayContainer &rays);
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[440] | 449 |
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| 450 |
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| 451 | int PostProcess(const ObjectContainer &objects,
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[466] | 452 | const VssRayContainer &rays);
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[440] | 453 |
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| 454 | void Visualize(const ObjectContainer &objects,
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[466] | 455 | const VssRayContainer &sampleRays);
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[440] | 456 |
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| 457 | int GetType() const;
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| 458 |
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| 459 | bool ViewCellsConstructed() const;
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| 460 |
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[475] | 461 | //virtual void PrintStatistics(ostream &s) const;
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[440] | 462 |
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[462] | 463 | ViewCell *GenerateViewCell(Mesh *mesh) const;
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| 464 |
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[466] | 465 |
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| 466 | int CastLineSegment(const Vector3 &origin,
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| 467 | const Vector3 &termination,
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[468] | 468 | ViewCellContainer &viewcells);
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[466] | 469 |
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[492] | 470 | ViewCell *GetViewCell(const Vector3 &point) { return NULL; }
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| 471 |
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[471] | 472 | float GetProbability(ViewCell *viewCell);
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[469] | 473 | float GetRendercost(ViewCell *viewCell, float objRendercost) const;
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[468] | 474 |
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[477] | 475 | AxisAlignedBox3 GetSceneBbox() const;
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[440] | 476 | protected:
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| 477 |
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[482] | 478 | void ExportLeaves(const ObjectContainer &objects,
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| 479 | const VssRayContainer &sampleRays);
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| 480 |
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[480] | 481 | void CollectViewCells();
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| 482 |
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[482] | 483 | void ExportColor(Exporter *exporter, ViewCell *vc) const;
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[485] | 484 | void ExportVcGeometry(Exporter *exporter, ViewCell *vc) const;
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[482] | 485 |
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| 486 |
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[440] | 487 | /// the BSP tree.
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| 488 | VspKdTree *mVspKdTree;
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| 489 | };
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| 490 |
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| 491 |
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[442] | 492 |
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| 493 | /**
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| 494 | Manages different higher order operations on the view cells.
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| 495 | */
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| 496 | class VspBspViewCellsManager: public ViewCellsManager
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| 497 | {
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| 498 |
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| 499 | public:
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| 500 |
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| 501 | VspBspViewCellsManager(VspBspTree *tree, int constructionSamples);
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[475] | 502 | ~VspBspViewCellsManager();
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[442] | 503 |
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| 504 | int Construct(const ObjectContainer &objects,
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[487] | 505 | const VssRayContainer &rays);
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[442] | 506 |
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| 507 | int PostProcess(const ObjectContainer &objects,
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[466] | 508 | const VssRayContainer &rays);
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[442] | 509 |
|
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| 510 | void Visualize(const ObjectContainer &objects,
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[466] | 511 | const VssRayContainer &sampleRays);
|
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[442] | 512 |
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| 513 | int GetType() const;
|
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| 514 |
|
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| 515 | ViewCell *GenerateViewCell(Mesh *mesh = NULL) const;
|
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| 516 |
|
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| 517 | bool ViewCellsConstructed() const;
|
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| 518 |
|
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[468] | 519 |
|
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| 520 | int CastLineSegment(const Vector3 &origin,
|
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| 521 | const Vector3 &termination,
|
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| 522 | ViewCellContainer &viewcells);
|
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[452] | 523 |
|
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[471] | 524 | float GetProbability(ViewCell *viewCell);
|
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[469] | 525 | float GetRendercost(ViewCell *viewCell, float objRendercost) const;
|
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[479] | 526 |
|
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[477] | 527 | AxisAlignedBox3 GetSceneBbox() const;
|
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| 528 |
|
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[492] | 529 | ViewCell *GetViewCell(const Vector3 &point);
|
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| 530 |
|
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[487] | 531 | bool GetViewPoint(Vector3 &viewPoint) const;
|
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| 532 |
|
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[490] | 533 | bool ViewPointValid(const Vector3 &viewPoint) const;
|
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[442] | 534 | protected:
|
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[485] | 535 | /** DEPRECATED
|
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[475] | 536 | */
|
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[485] | 537 | int MergeViewCells(const VssRayContainer &rays) const;
|
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[475] | 538 |
|
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[442] | 539 | /** Returns true if front and back leaf should be merged.
|
---|
| 540 | */
|
---|
[448] | 541 | bool ShouldMerge(BspLeaf *front, BspLeaf *back) const;
|
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[442] | 542 |
|
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[480] | 543 | void CollectViewCells();
|
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| 544 |
|
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[482] | 545 | /** Returns maximal depth difference of view cell
|
---|
| 546 | leaves in tree.
|
---|
| 547 | */
|
---|
| 548 | int GetMaxTreeDiff(ViewCell *vc) const;
|
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[485] | 549 |
|
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[482] | 550 |
|
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[485] | 551 | void ExportColor(Exporter *exporter, ViewCell *vc) const;
|
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| 552 | void ExportVcGeometry(Exporter *exporter, ViewCell *vc) const;
|
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| 553 |
|
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| 554 |
|
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[442] | 555 | /// the view space partition BSP tree.
|
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| 556 | VspBspTree *mVspBspTree;
|
---|
| 557 |
|
---|
| 558 | private:
|
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| 559 |
|
---|
| 560 | /** Exports visualization of the BSP splits.
|
---|
| 561 | */
|
---|
[485] | 562 | void ExportSplits(const ObjectContainer &objects,
|
---|
| 563 | const VssRayContainer &rays);
|
---|
[442] | 564 |
|
---|
| 565 | /** Exports visualization of the BSP PVS.
|
---|
| 566 | */
|
---|
[485] | 567 | void ExportBspPvs(const ObjectContainer &objects,
|
---|
| 568 | const VssRayContainer &rays);
|
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[442] | 569 |
|
---|
| 570 | };
|
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| 571 |
|
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[440] | 572 | #endif
|
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