Revision 68,
1.8 KB
checked in by bittner, 19 years ago
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Added include files
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[68] | 1 | #ifndef _ViewCellBsp_H__ |
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| 2 | #define _ViewCellBsp_H__ |
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| 3 | |
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| 4 | namespace GtpVisibilityPreprocessor { |
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| 5 | |
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| 6 | |
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| 7 | class BSPInterior; |
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| 8 | |
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| 9 | /** |
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| 10 | BSPNode abstract class serving for interior and leaf node implementation |
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| 11 | */ |
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| 12 | class BSPNode { |
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| 13 | public: |
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| 14 | /** Determines whether this node is a leaf or not |
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| 15 | @return true if leaf |
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| 16 | */ |
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| 17 | virtual bool IsLeaf() const = 0; |
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| 18 | |
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| 19 | /** Determines whether this node is a root |
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| 20 | @return true if root |
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| 21 | */ |
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| 22 | virtual bool IsRoot() const { |
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| 23 | return parent == NULL; |
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| 24 | } |
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| 25 | protected: |
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| 26 | /// parent of this node |
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| 27 | BSPInterior *parent; |
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| 28 | }; |
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| 29 | |
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| 30 | /** BSP interior node implementation */ |
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| 31 | class BSPInterior : public BSPNode { |
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| 32 | |
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| 33 | /** @return false since it is an interior node */ |
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| 34 | virtual bool IsLeaf() const { return false; } |
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| 35 | |
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| 36 | protected: |
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| 37 | /// Splitting plane corresponding to this node |
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| 38 | Plane3 mPlane; |
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| 39 | /// back node |
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| 40 | BSPNode *mBack; |
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| 41 | /// front node |
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| 42 | BSPNode *mFront; |
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| 43 | }; |
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| 44 | |
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| 45 | |
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| 46 | /** BSP leaf node implementation */ |
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| 47 | class BSPLeaf : public BSPNode { |
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| 48 | public: |
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| 49 | BSPLeaf(ViewCell *viewCell = NULL):mViewCell(viewCell) {} |
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| 50 | /** @return true since it is an interior node */ |
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| 51 | virtual bool IsLeaf() const { return true; } |
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| 52 | |
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| 53 | protected: |
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| 54 | /// polygonal representation of this viewcell |
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| 55 | /// if NULL this note does not correspond to feasible viewcell |
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| 56 | ViewCell *mViewCell; |
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| 57 | }; |
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| 58 | |
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| 59 | /** Implementation of the ViewCell BSP tree */ |
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| 60 | class BSPTree { |
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| 61 | public: |
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| 62 | /** Constructor takes a pointer to the cell corresponding to the whole |
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| 63 | viewspace */ |
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| 64 | BSPTree(ViewCell *cell) { |
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| 65 | mRootCell = cell; |
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| 66 | mRoot = new BSPLeaf(mRootCell); |
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| 67 | } |
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| 68 | |
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| 69 | |
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| 70 | protected: |
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| 71 | /// Pointer to the root of the tree |
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| 72 | BSPNode *mRoot; |
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| 73 | /// Pointer to the root cell of the viewspace */ |
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| 74 | ViewCell *mRootCell; |
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| 75 | }; |
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| 76 | |
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| 77 | }; |
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| 78 | |
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| 79 | |
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| 80 | |
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| 81 | #endif |
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