[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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[442] | 26 |
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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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| 57 | const VssRayContainer &rays,
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| 58 | AxisAlignedBox3 *sceneBbox = NULL) = 0;
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| 59 |
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[441] | 60 | /** Computes sample contributions of the rays to the view cells PVS.
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| 61 |
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| 62 | @param rays bundle of rays used to find intersections with view cells and
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| 63 | adding the contribution
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| 64 | @param castRays true if ray should be cast to gain the information, false if rays
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| 65 | already hold the view cells intersection information and need not be recast.
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| 66 | @param sampleContributions returns the number of sample contributions
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| 67 | @param contributingSamples returns the number of contributingSamples
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[440] | 68 | */
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[475] | 69 | void ComputeSampleContributions(const VssRayContainer &rays);
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[440] | 70 |
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[441] | 71 |
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[475] | 72 | /** Computes sample contribution of a simgle ray to the view cells PVS.
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| 73 | @param ray finds intersections with view cells and holds the contribution
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| 74 | @param castRay true if ray should be cast to gain the information, false if ray
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| 75 | is already holding the information and need not be recast.
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[466] | 76 |
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[475] | 77 | @returns number of sample contributions
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| 78 | */
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| 79 | virtual void ComputeSampleContributions(VssRay &ray);
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[466] | 80 |
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[452] | 81 | /** Prints out statistics of the view cells.
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| 82 | */
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[475] | 83 | virtual void PrintStatistics(ostream &s) const;
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[452] | 84 |
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[440] | 85 | /** Post processes view cells givemŽa number of rays.
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| 86 | */
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[475] | 87 | virtual int PostProcess(const ObjectContainer &objects,
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| 88 | const VssRayContainer &rays) = 0;
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[440] | 89 |
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| 90 | /** Show visualization of the view cells.
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| 91 | */
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| 92 | virtual void Visualize(const ObjectContainer &objects,
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[466] | 93 | const VssRayContainer &sampleRays) = 0;
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[440] | 94 |
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| 95 | /** type of the view cell container.
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| 96 | */
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| 97 | virtual int GetType() const = 0;
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| 98 |
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[463] | 99 | /** Load the input viewcells. The input viewcells should be given as a collection
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| 100 | of meshes. Each mesh is assume to form a bounded polyhedron defining the interior of
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| 101 | the viewcell. The method then builds a BSP tree of these view cells.
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| 102 |
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| 103 | @param filename file to load
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| 104 | @return true on success
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| 105 | */
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[440] | 106 | bool LoadViewCells(const string filename);
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| 107 |
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| 108 | /** Constructs view cell from base triangle. The ViewCell is extruded along the normal vector.
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| 109 | @param the base triangle
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| 110 | @param the height of the newly created view cell
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| 111 | */
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| 112 | ViewCell *ExtrudeViewCell(const Triangle3 &baseTri, const float height) const;
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| 113 |
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| 114 | /** Merges two view cells.
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| 115 | @note the piercing rays of the front and back will be ordered
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| 116 | @returns new view cell based on the merging.
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| 117 | */
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[441] | 118 | ViewCell *MergeViewCells(ViewCell &front, ViewCell &back) const;
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[440] | 119 |
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| 120 | /** Generates view cell of type specified by this manager
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| 121 | */
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| 122 | virtual ViewCell *GenerateViewCell(Mesh *mesh = NULL) const;
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| 123 |
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| 124 | /** Adds a new view cell to the list of predefined view cells.
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| 125 | */
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| 126 | void AddViewCell(ViewCell *viewCell);
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| 127 |
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| 128 | /** Derive view cells from objects.
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| 129 | */
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| 130 | void DeriveViewCells(const ObjectContainer &objects,
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| 131 | ViewCellContainer &viewCells,
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| 132 | const int maxViewCells) const;
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| 133 |
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| 134 | /** Sets maximal number of samples used for the
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| 135 | construction of the view cells.
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| 136 | */
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| 137 | void SetVisualizationSamples(const int visSamples);
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| 138 |
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| 139 | /** Sets maximal number of samples used for the visualization of the view cells.
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| 140 | */
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| 141 | void SetConstructionSamples(const int constructionSamples);
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| 142 |
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| 143 | /** Sets maximal number of samples used for the post processing of the view cells.
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| 144 | */
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| 145 | void SetPostProcessSamples(const int postProcessingSamples);
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| 146 |
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| 147 | /** See set.
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| 148 | */
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| 149 | int GetVisualizationSamples() const;
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| 150 |
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| 151 | /** See set.
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| 152 | */
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| 153 | int GetConstructionSamples() const;
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| 154 |
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| 155 | /** See set.
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| 156 | */
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| 157 | int GetPostProcessSamples() const;
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| 158 |
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| 159 | /** Returns true if view cells wer already constructed.
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| 160 | */
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| 161 | virtual bool ViewCellsConstructed() const = 0;
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[441] | 162 |
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[477] | 163 | /** cast line segment to get a list of unique viewcells which are intersected
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| 164 | by this line segment
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| 165 | */
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[466] | 166 |
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[477] | 167 | virtual int CastLineSegment(const Vector3 &origin,
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[466] | 168 | const Vector3 &termination,
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| 169 | ViewCellContainer &viewcells
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| 170 | ) = 0;
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| 171 |
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[477] | 172 | virtual void GetPvsStatistics(PvsStatistics &stat);
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[466] | 173 |
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[477] | 174 | virtual void PrintPvsStatistics(ostream &s);
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[467] | 175 |
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[477] | 176 | /** Returns probability that view point lies in one view cell.
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| 177 | */
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| 178 | virtual float GetProbability(ViewCell *viewCell) = 0;
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[468] | 179 |
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[477] | 180 | /** Returns render cost of a single view cell given the render cost of an object.
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| 181 | */
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| 182 | virtual float GetRendercost(ViewCell *viewCell, float objRendercost) const = 0;
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[468] | 183 |
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[477] | 184 | /** Returns vector of loaded / generated view cells.
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| 185 | */
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| 186 | ViewCellContainer &GetViewCells();
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[468] | 187 |
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[477] | 188 | /** Helper function used to split ray set into one used for view cell
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| 189 | construction and one cast after construction.
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| 190 | */
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| 191 | void GetRaySets(const VssRayContainer &sourceRays,
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| 192 | VssRayContainer &constructionRays,
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| 193 | VssRayContainer &savedRays) const;
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[440] | 194 |
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[480] | 195 | /** Returns accumulated area of all view cells.
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| 196 | */
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| 197 | float GetAccVcArea();
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[470] | 198 |
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[480] | 199 | /** Returns area of one view cell.
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| 200 | */
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| 201 | virtual float GetArea(ViewCell *viewCell) const;
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[470] | 202 |
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[480] | 203 | /** Returns volume of view cells.
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| 204 | */
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| 205 | virtual float GetVolume(ViewCell *viewCell) const;
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[470] | 206 |
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[480] | 207 | virtual AxisAlignedBox3 GetSceneBbox() const = 0;
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[477] | 208 |
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[480] | 209 | /** Sets the current renderer mainly for view cells statistics.
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| 210 | */
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| 211 | void SetRenderer(Renderer *renderer);
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| 212 |
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| 213 |
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[469] | 214 | protected:
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[480] | 215 |
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| 216 | /** Recollects view cells and resets statistics.
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| 217 | */
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| 218 | void ResetViewCells();
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| 219 | /** Collects the view cells in the view cell container.
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| 220 | */
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| 221 | virtual void CollectViewCells() = 0;
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| 222 |
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[479] | 223 | /** Evaluates view cells statistics and stores it in
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| 224 | mViewCellsStatistics.
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| 225 | */
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| 226 | void EvaluateViewCellsStats();
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[469] | 227 |
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[440] | 228 | /// the view cell corresponding to unbounded space
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| 229 | ViewCell *mUnbounded;
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| 230 |
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[480] | 231 | /// Renders the view cells.
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| 232 | Renderer *mRenderer;
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[440] | 233 |
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| 234 | /// Loaded view cells
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[469] | 235 | ViewCellContainer mViewCells;
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[440] | 236 |
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| 237 | /// maximum number of samples taken for construction of the view cells
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| 238 | int mConstructionSamples;
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| 239 | int mPostProcessSamples;
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| 240 | int mVisualizationSamples;
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[441] | 241 |
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[463] | 242 | //-- thresholds used for view cells merge
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| 243 | int mMinPvsDif;
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| 244 | int mMinPvs;
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[441] | 245 | int mMaxPvs;
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[470] | 246 |
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| 247 | float mTotalAreaValid;
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| 248 | float mTotalArea;
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[475] | 249 |
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| 250 | ViewCellsStatistics mViewCellsStats;
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[440] | 251 | };
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| 252 |
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[441] | 253 |
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| 254 |
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[440] | 255 | /**
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| 256 | Manages different higher order operations on the view cells.
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| 257 | */
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| 258 | class BspViewCellsManager: public ViewCellsManager
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| 259 | {
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| 260 |
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| 261 | public:
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| 262 |
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| 263 | BspViewCellsManager(BspTree *tree, int constructionSamples);
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| 264 |
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[477] | 265 | ~BspViewCellsManager();
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| 266 |
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[440] | 267 | int Construct(const ObjectContainer &objects,
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| 268 | const VssRayContainer &rays,
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| 269 | AxisAlignedBox3 *sceneBbox);
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| 270 |
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| 271 |
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| 272 | int PostProcess(const ObjectContainer &objects,
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[466] | 273 | const VssRayContainer &rays);
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[440] | 274 |
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| 275 | void Visualize(const ObjectContainer &objects,
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[466] | 276 | const VssRayContainer &sampleRays);
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[440] | 277 |
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| 278 | int GetType() const;
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| 279 |
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| 280 | ViewCell *GenerateViewCell(Mesh *mesh = NULL) const;
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| 281 |
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| 282 | bool ViewCellsConstructed() const;
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| 283 |
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[475] | 284 | //void PrintStatistics(ostream &s) const;
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[452] | 285 |
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[468] | 286 | int CastLineSegment(const Vector3 &origin,
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| 287 | const Vector3 &termination,
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| 288 | ViewCellContainer &viewcells);
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| 289 |
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[471] | 290 | float GetProbability(ViewCell *viewCell);
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[469] | 291 | float GetRendercost(ViewCell *viewCell, float objRendercost) const;
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[466] | 292 |
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[477] | 293 | AxisAlignedBox3 GetSceneBbox() const;
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| 294 |
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[440] | 295 | protected:
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| 296 |
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[480] | 297 | void CollectViewCells();
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| 298 |
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[441] | 299 | /** Merges view cells front and back leaf view cell.
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| 300 | */
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| 301 | bool MergeBspLeafViewCells(BspLeaf *front, BspLeaf *back) const;
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[440] | 302 |
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[441] | 303 | /** Returns true if front and back leaf should be merged.
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| 304 | */
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| 305 | bool ShouldMerge(BspLeaf *front, BspLeaf *back) const;
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| 306 |
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[477] | 307 | void ConstructBspRays(const VssRayContainer &rays,
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| 308 | const int numSamples);
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[440] | 309 | /// the BSP tree.
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| 310 | BspTree *mBspTree;
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[475] | 311 |
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| 312 | vector<BspRay *> mBspRays;
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[440] | 313 |
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| 314 | private:
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| 315 |
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| 316 | /** Exports visualization of the BSP splits.
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| 317 | */
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[477] | 318 | void ExportSplits(const ObjectContainer &objects);
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[440] | 319 |
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| 320 | /** Exports visualization of the BSP PVS.
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| 321 | */
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[477] | 322 | void ExportBspPvs(const ObjectContainer &objects);
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[440] | 323 |
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| 324 | };
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| 325 |
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| 326 | /**
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| 327 | Manages different higher order operations on the KD type view cells.
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| 328 | */
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| 329 | class KdViewCellsManager: public ViewCellsManager
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| 330 | {
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| 331 |
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| 332 | public:
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| 333 |
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| 334 | KdViewCellsManager(KdTree *tree);
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| 335 |
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| 336 | int Construct(const ObjectContainer &objects,
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| 337 | const VssRayContainer &rays,
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| 338 | AxisAlignedBox3 *sceneBbox);
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| 339 |
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[478] | 340 | int CastLineSegment(const Vector3 &origin,
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| 341 | const Vector3 &termination,
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| 342 | ViewCellContainer &viewcells);
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[440] | 343 |
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| 344 | int PostProcess(const ObjectContainer &objects,
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[466] | 345 | const VssRayContainer &rays);
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[440] | 346 |
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| 347 | void Visualize(const ObjectContainer &objects,
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[466] | 348 | const VssRayContainer &sampleRays);
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[440] | 349 |
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| 350 | int GetType() const;
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| 351 |
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| 352 | bool ViewCellsConstructed() const;
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| 353 |
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| 354 |
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[452] | 355 | /** Prints out statistics of this approach.
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| 356 | */
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[475] | 357 | //void PrintStatistics(ostream &s) const;
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[452] | 358 |
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[471] | 359 | float GetProbability(ViewCell *viewCell);
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[469] | 360 | float GetRendercost(ViewCell *viewCell, float objRendercost) const;
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[477] | 361 |
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| 362 | AxisAlignedBox3 GetSceneBbox() const;
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[468] | 363 |
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[440] | 364 | protected:
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| 365 |
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[480] | 366 | void CollectViewCells();
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| 367 | KdNode *GetNodeForPvs(KdLeaf *leaf);
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[440] | 368 |
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| 369 |
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[480] | 370 | /// the BSP tree.
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| 371 | KdTree *mKdTree;
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[440] | 372 |
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[480] | 373 | /// depth of the KD tree nodes with represent the view cells
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| 374 | int mKdPvsDepth;
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[440] | 375 | };
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| 376 |
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| 377 | /**
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| 378 | Manages different higher order operations on the view cells
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| 379 | for vsp kd tree view cells.
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| 380 | */
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| 381 | class VspKdViewCellsManager: public ViewCellsManager
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| 382 | {
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| 383 |
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| 384 | public:
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| 385 |
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| 386 | VspKdViewCellsManager(VspKdTree *vspKdTree, int constructionSamples);
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| 387 |
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| 388 | int Construct(const ObjectContainer &objects,
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| 389 | const VssRayContainer &rays,
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| 390 | AxisAlignedBox3 *sceneBbox);
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| 391 |
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| 392 |
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| 393 | int PostProcess(const ObjectContainer &objects,
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[466] | 394 | const VssRayContainer &rays);
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[440] | 395 |
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| 396 | void Visualize(const ObjectContainer &objects,
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[466] | 397 | const VssRayContainer &sampleRays);
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[440] | 398 |
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| 399 | int GetType() const;
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| 400 |
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| 401 | bool ViewCellsConstructed() const;
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| 402 |
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[475] | 403 | //virtual void PrintStatistics(ostream &s) const;
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[440] | 404 |
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[462] | 405 | ViewCell *GenerateViewCell(Mesh *mesh) const;
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| 406 |
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[466] | 407 |
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| 408 | int CastLineSegment(const Vector3 &origin,
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| 409 | const Vector3 &termination,
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[468] | 410 | ViewCellContainer &viewcells);
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[466] | 411 |
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[471] | 412 | float GetProbability(ViewCell *viewCell);
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[469] | 413 | float GetRendercost(ViewCell *viewCell, float objRendercost) const;
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[468] | 414 |
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[477] | 415 | AxisAlignedBox3 GetSceneBbox() const;
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| 416 |
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[440] | 417 | protected:
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| 418 |
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[480] | 419 | void CollectViewCells();
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| 420 |
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[440] | 421 | /// the BSP tree.
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| 422 | VspKdTree *mVspKdTree;
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| 423 | };
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| 424 |
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| 425 |
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[442] | 426 |
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| 427 | /**
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| 428 | Manages different higher order operations on the view cells.
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| 429 | */
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| 430 | class VspBspViewCellsManager: public ViewCellsManager
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| 431 | {
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| 432 |
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| 433 | public:
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| 434 |
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| 435 | VspBspViewCellsManager(VspBspTree *tree, int constructionSamples);
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[475] | 436 | ~VspBspViewCellsManager();
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[442] | 437 |
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| 438 | int Construct(const ObjectContainer &objects,
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| 439 | const VssRayContainer &rays,
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| 440 | AxisAlignedBox3 *sceneBbox);
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| 441 |
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| 442 |
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| 443 | int PostProcess(const ObjectContainer &objects,
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[466] | 444 | const VssRayContainer &rays);
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[442] | 445 |
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| 446 | void Visualize(const ObjectContainer &objects,
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[466] | 447 | const VssRayContainer &sampleRays);
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[442] | 448 |
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| 449 | int GetType() const;
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| 450 |
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| 451 | ViewCell *GenerateViewCell(Mesh *mesh = NULL) const;
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| 452 |
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| 453 | bool ViewCellsConstructed() const;
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| 454 |
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[475] | 455 | //void PrintStatistics(ostream &s) const;
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[468] | 456 |
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| 457 | int CastLineSegment(const Vector3 &origin,
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| 458 | const Vector3 &termination,
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| 459 | ViewCellContainer &viewcells);
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[452] | 460 |
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[471] | 461 | float GetProbability(ViewCell *viewCell);
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[469] | 462 | float GetRendercost(ViewCell *viewCell, float objRendercost) const;
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[479] | 463 |
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[477] | 464 | AxisAlignedBox3 GetSceneBbox() const;
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| 465 |
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[442] | 466 | protected:
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| 467 |
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[475] | 468 | /** Constructs bsp rays for post processing and visualization.
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| 469 | */
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| 470 | void ConstructBspRays(const VssRayContainer &rays, const int numSamples);
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| 471 |
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[442] | 472 | /** Merges view cells front and back leaf view cell.
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| 473 | */
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[448] | 474 | bool MergeVspBspLeafViewCells(BspLeaf *front, BspLeaf *back) const;
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[442] | 475 |
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| 476 | /** Returns true if front and back leaf should be merged.
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| 477 | */
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[448] | 478 | bool ShouldMerge(BspLeaf *front, BspLeaf *back) const;
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[442] | 479 |
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[480] | 480 | void CollectViewCells();
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| 481 |
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[442] | 482 | /// the view space partition BSP tree.
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| 483 | VspBspTree *mVspBspTree;
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| 484 |
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[475] | 485 | vector<BspRay *> mBspRays;
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[442] | 486 |
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| 487 | private:
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| 488 |
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| 489 |
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| 490 | /** Exports visualization of the BSP splits.
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| 491 | */
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[475] | 492 | void ExportSplits(const ObjectContainer &objects);
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[442] | 493 |
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| 494 | /** Exports visualization of the BSP PVS.
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| 495 | */
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[475] | 496 | void ExportBspPvs(const ObjectContainer &objects);
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[442] | 497 |
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| 498 | };
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| 499 |
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[440] | 500 | #endif
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