source: GTP/trunk/Lib/Vis/OnlineCullingCHC/OGRE/include/OgreOctreeHierarchyInterface.h @ 2332

#ifndef _OctreeHierarchyInterface_H__
#define _OctreeHierarchyInterface_H__

#include <OgreOctree.h>
#include <OgreOctreeSceneManager.h>
#include "OgreSceneNodeHierarchyInterface.h"

namespace Ogre {
/**
        This class implements the hierarchy interface for the Ogre octree hierarchy.
*/
class OctreeHierarchyInterface : public SceneNodeHierarchyInterface
{
public:
        OctreeHierarchyInterface(OctreeSceneManager *sm, RenderSystem *rsys);
        
        /** Sets the number of nodes in this octree 
                @remark do not confuse this with the OctreeNode class 
                which is derived from SceneNode.
                @param num number of nodes in the octree
        */
        void SetNumOctreeNodes(unsigned int num);

        /** Gets the given option for the scene traverser.
            @remarks
                See setOption
        */
        void PullUpVisibility(GtpVisibility::HierarchyNode *node) const;
        
        /** Traverses and renders the given node.
                @param node current node
                @remark pushes children on a distance queue.
        */
        void TraverseNode(GtpVisibility::HierarchyNode *node);
        /** @copydoc HierarchyInterface::RenderNode */
        void RenderNode(GtpVisibility::HierarchyNode *node);
        bool IsLeaf(GtpVisibility::HierarchyNode *node) const;
        bool HasGeometry(GtpVisibility::HierarchyNode *node) const;
        float GetSquaredDistance(GtpVisibility::HierarchyNode *node) const;
        
        void SetNodeVisible(GtpVisibility::HierarchyNode *node, const bool visible) const;
        void SetLastVisited(GtpVisibility::HierarchyNode *node, const unsigned int frameId) const;

        bool IsNodeVisible(GtpVisibility::HierarchyNode *node) const;
        unsigned int LastVisited(GtpVisibility::HierarchyNode *node) const;

        void VisualizeCulledNode(GtpVisibility::HierarchyNode *node, 
                                                         GtpVisibility::CullingType type) const;

        void GetNodeGeometryList(GtpVisibility::HierarchyNode *node,
                                                         GeometryVector *geometryList, 
                                                         bool includeChildren);
        
        void DetermineFullVisibility(GtpVisibility::HierarchyNode *node) const;

        GtpVisibility::HierarchyNode *GetRandomLeaf(GtpVisibility::HierarchyNode *node);

        bool IsNodeFullyVisible(GtpVisibility::HierarchyNode *node) const;

        void RenderNodeRecursive(GtpVisibility::HierarchyNode *node);

        void CollectLeaves(GtpVisibility::HierarchyNode *root, 
                                           GtpVisibility::HierarchyNodeContainer &nodes);

        void PullUpLastVisited(GtpVisibility::HierarchyNode *node, const int frameId) const;
        void DetermineVisibilityRatio(GtpVisibility::HierarchyNode *node) const;
        float GetNodeVisibilityRatio(GtpVisibility::HierarchyNode *node) const;

        GtpVisibility::HierarchyNode *GetParent(GtpVisibility::HierarchyNode *node);


protected:

        /** Returns pointer to the bounding box of the node.
                @param node current hierarchy node
                @returns bounding box of current node
        */
        AxisAlignedBox *GetBoundingBox(GtpVisibility::HierarchyNode *node);
        /** Returns squared distance of center of box with respect to the camera .
                @param cam current camera
                @param box axis aligned box
        */
        Real GetSquaredViewDepth(const Camera* cam, const AxisAlignedBox* box) const;
};
} // namespace Ogre

#endif // OctreeHierarchyInterface_H