source: trunk/VUT/Ogre/include/OgreOctreeHierarchyInterface.h @ 87

#ifndef _OctreeHierarchyInterface_H__
#define _OctreeHierarchyInterface_H__

#include <OgreOctree.h>
#include "OgrePlatformHierarchyInterface.h"

namespace Ogre {
/**
        This class implements the hierarchy interface for the Ogre octree hierarchy.
*/
class OctreeHierarchyInterface : public PlatformHierarchyInterface
{
public:
        OctreeHierarchyInterface(SceneManager *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
        */
        //bool getOption( const String &, void * );
        //bool getOptionKeys( StringVector &refKeys );
        void PullUpVisibility(GtpVisibility::HierarchyNode *node);
        /** Traverses given node.
                @param node current node
                @remark pushes children on distance queue
        */
        void TraverseNode(GtpVisibility::HierarchyNode *node);
        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);
        void SetLastVisited(GtpVisibility::HierarchyNode *node, const unsigned int frameId);

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

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;
        unsigned int mNumOctreeNodes;
};
} // namespace Ogre

#endif // OctreeHierarchyInterface_H