[59] | 1 | #ifndef _GtpVisibilityHierarchyInterface_H__
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| 2 | #define _GtpVisibilityHierarchyInterface_H__
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| 3 |
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| 4 | #include "DistanceQueue.h"
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| 5 |
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| 6 | namespace GtpVisibility {
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| 7 |
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| 8 | /** Class which implements a hierarchy interface for a scene hierarchy.
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| 9 | */
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| 10 | class HierarchyInterface
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| 11 | {
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| 12 | public:
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| 13 | /** Default constructor.
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| 14 | */
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| 15 | HierarchyInterface();
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| 16 | virtual ~HierarchyInterface();
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| 17 | /** Returns true if current node is leaf of the hierarchy.
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| 18 | @param node hierarchy node
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| 19 | @returns true if node is leaf
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| 20 | */
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| 21 | virtual bool IsLeaf(HierarchyNode *node) = 0;
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| 22 | /** Traverses the given node.
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| 23 | @param node the hierarchy node
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| 24 | */
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| 25 | virtual void TraverseNode(HierarchyNode *node) = 0;
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| 26 | /** Renders current scene node .
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| 27 | @param node current scene node to be rendered
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| 28 | */
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| 29 | virtual void RenderNode(HierarchyNode *node) = 0;
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| 30 | /** Pulls up the visibility from the current node recursively to the parent nodes.
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| 31 | @param node the current node
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| 32 | */
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| 33 | virtual void PullUpVisibility(HierarchyNode *node) = 0;
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| 34 | /** Issue a occlusion query for this node.
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| 35 | @param node the current hierarchy node
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| 36 | @returns occlusion query for this node
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| 37 | */
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| 38 | virtual OcclusionQuery *IssueOcclusionQuery(HierarchyNode *node) = 0;
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| 39 | /** Sets the root of the scene hierarchy.
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| 40 | @param root the hierarchy root
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| 41 | */
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| 42 | void SetSceneRoot(HierarchyNode *root);
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| 43 | /** Sets the scene root and initialises this scene traverser for a traversal.
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| 44 | @param root current scene root
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| 45 | @remark initialises some parameters, and also the statistics.
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| 46 | */
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| 47 | void InitFrame(HierarchyNode *root);
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| 48 |
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| 49 | /** Returns current frame id.
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| 50 | @returns frame id
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| 51 | */
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| 52 | int GetFrameId();
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| 53 | /** Returns the current distance queue.
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| 54 | @returns current distance queue
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| 55 | */
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| 56 | DistanceQueue *GetQueue();
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| 57 | /** Returns true if node 1 has greater distance to the view
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| 58 | plane than node 2.
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| 59 | @param node1 the first node to be compared
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| 60 | @param node2 the second node to be compared
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| 61 | */
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| 62 | virtual bool HasGreaterDistance(HierarchyNode *node1, HierarchyNode *node2) = 0;
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| 63 | /** Checks if the node is visible from the current view frustum.
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| 64 | @param node the current node
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| 65 | @param intersects returns true if the current node intersects the near plane
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| 66 | */
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| 67 | virtual bool CheckFrustumVisible(HierarchyNode *node, bool &intersects) = 0;
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| 68 | /** Returns next available occlusion query or creates new one.
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| 69 | @return the next occlusion query
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| 70 | */
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| 71 | virtual OcclusionQuery *GetNextOcclusionQuery() = 0;
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| 72 | /** Returns true if there is renderable geometry attached to this node
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| 73 | @param node the current node
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| 74 | @returns if the node has renderable geometry
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| 75 | */
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| 76 | virtual bool HasGeometry(HierarchyNode *node) = 0;
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| 77 | /** Sets the visible flag for this node.
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| 78 | @param node the current node
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| 79 | @param visible the visible flag
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| 80 | */
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| 81 | virtual void SetNodeVisible(HierarchyNode *node, const bool visible) = 0;
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| 82 | /** Returns true if node has the visible flag set. See set
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| 83 | */
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| 84 | virtual bool IsNodeVisible(HierarchyNode *node) = 0;
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| 85 | /** Sets the last visited frame id for this node.
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| 86 | @param node the current node
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| 87 | @param frameId the current frame id
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| 88 | */
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| 89 | virtual void SetLastVisited(HierarchyNode *node, const int frameId) = 0;
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| 90 | /** Returns frame id when this node was last visited by the traverser. See set
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| 91 | */
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| 92 | virtual int LastVisited(HierarchyNode *node) = 0;
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| 93 |
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| 94 | protected:
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| 95 |
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| 96 | unsigned int mFrameId;
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| 97 |
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| 98 | int mCurrentTestIdx;
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| 99 |
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| 100 | //--- statistics
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| 101 | unsigned int mNumSceneNodes;
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| 102 | unsigned int mNumTraversedNodes;
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| 103 | unsigned int mNumRenderedGeometry;
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| 104 | unsigned int mNumRenderedNodes;
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| 105 |
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| 106 | DistanceQueue *mDistanceQueue;
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| 107 | HierarchyNode *mSceneRoot;
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| 108 | //HierarchyNode *mCurrentNode;
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| 109 | };
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| 110 | } // namespace GtpVisibility
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| 111 | #endif // GtpVisisibilityHierarchyInterface_H |
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