[372] | 1 | #ifndef _ViewCell_H__
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| 2 | #define _ViewCell_H__
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| 3 |
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| 4 | #include "Mesh.h"
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| 5 | #include "Containers.h"
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| 6 | #include "Ray.h"
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| 7 |
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| 8 | //namespace GtpVisibilityPreprocessor {
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| 9 |
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| 10 | class BspInterior;
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| 11 | class BspPvs;
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| 12 | struct Triangle3;
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| 13 | class BspLeaf;
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| 14 |
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| 15 | /**
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| 16 | View cell with an optional mesh representation
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| 17 | */
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| 18 | class ViewCell: public MeshInstance
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| 19 | {
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| 20 | public:
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| 21 | ViewCell();
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| 22 | /** Constructor taking a mesh representing the shape of the viewcell.
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| 23 | */
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| 24 | ViewCell(Mesh *mesh);
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| 25 | /** Returns PvS.
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| 26 | */
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| 27 | ViewCellPvs &GetPvs();
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| 28 |
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| 29 | int Type() const;
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| 30 |
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| 31 | /** Derives viewcells from object container.
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| 32 | @param objects the intersectables the viewcells are derived from
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| 33 | @param viewCells the viewcells are returned in this container
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| 34 | @param maxViewCells the maximum number of viewcells created. if 0 => unbounded
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| 35 | */
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| 36 | static void DeriveViewCells(const ObjectContainer &objects,
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[411] | 37 | ViewCellContainer &viewCells,
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| 38 | const int maxViewCells);
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[372] | 39 |
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| 40 |
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| 41 | /** Adds a passing ray to the passing ray container.
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| 42 | */
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| 43 | void AddPassingRay(const Ray &ray, const int contributions);
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| 44 |
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| 45 | /** Constructs view cell from base triangle. The ViewCell is extruded along the normal vector.
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| 46 | @param the base triangle
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| 47 | @param the height of the newly created view cell
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| 48 | */
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| 49 | static ViewCell *ExtrudeViewCell(const Triangle3 &baseTri, const float height);
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| 50 |
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| 51 | /** Merges two view cells.
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| 52 | @note the piercing rays of the front and back will be ordered
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| 53 | @returns new view cell based on the merging.
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| 54 | */
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| 55 | static ViewCell *Merge(ViewCell &front, ViewCell &back);
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| 56 |
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| 57 | /// Ray set description of the rays passing through this node.
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| 58 | PassingRaySet mPassingRays;
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| 59 |
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| 60 | /// Rays piercing this view cell.
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| 61 | RayContainer mPiercingRays;
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| 62 |
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| 63 | /// view cells types
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[411] | 64 | enum HierarchyType {BSP, KD, VSP};
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[372] | 65 |
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| 66 | /** Generates view cells of type specified by view cells type.
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| 67 | */
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| 68 | static ViewCell *Generate(Mesh *mesh = NULL);
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| 69 |
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| 70 | /// type of view cells hierarchy (KD, BSP)
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| 71 | static HierarchyType sHierarchy;
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| 72 |
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| 73 | protected:
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| 74 |
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| 75 | /// the potentially visible objects
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| 76 | ViewCellPvs mPvs;
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| 77 | };
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| 78 |
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[366] | 79 | class BspViewCell: public ViewCell
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| 80 | {
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| 81 | public:
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| 82 | BspViewCell(): mBspLeaves(0) {}
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| 83 | BspViewCell(Mesh *mesh):
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| 84 | ViewCell(mesh), mBspLeaves(0) {}
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| 85 |
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| 86 | /// Leaves which hold this view cell.
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[372] | 87 | vector<BspLeaf *> mBspLeaves;
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| 88 | };
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| 89 |
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| 90 | #endif
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