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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37 | ViewCellContainer &viewCells, |
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38 | const int maxViewCells); |
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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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64 | enum HierarchyType {BSP, KD}; |
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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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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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87 | vector<BspLeaf *> mBspLeaves; |
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88 | }; |
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89 | |
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90 | #endif |
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