source: GTP/trunk/Lib/Vis/OnlineCullingCHC/OGRE/include/OgreOcclusionQueriesQueryManager.h @ 2505

#ifndef _OcclusionQueriesQueryManager_H__
#define _OcclusionQueriesQueryManager_H__


#include "OgrePlatformQueryManager.h"


namespace Ogre {
  
class OgrePlatformHierarchyInterface;
class Viewport;

/** Class which implements a query manager for Ogre scene queries using occlusion queries.
*/
class __declspec(dllexport) OcclusionQueriesQueryManager: public PlatformQueryManager
{
public:
    /** Constructor taking a hierarchy interface as an argument. This allows to operate
                on different hierarchy types, while reusing the implementation of the query methods.
    */
        OcclusionQueriesQueryManager(PlatformHierarchyInterface *hierarchyInterface, 
                                                                 Viewport *vp,
                                                                 int queryModes):  
        PlatformQueryManager(hierarchyInterface, vp, queryModes)
        {}

    void ComputeCameraVisibility(const Camera &camera,
                                                                 NodeInfoContainer *visibleNodes,
                                                                 MeshInfoContainer *visibleGeometry,
                                                                 PatchInfoContainer *visiblePatches,
                                                                 const bool relativeVisibility,
                                                                 const bool approximateVisibility);
    
    /** Uses the specified point to execute the visibility query in all directions. 
                @sa ComputeCameraVisibility()
    */
    void ComputeFromPointVisibility(const Vector3 &point,
                                                                        NodeInfoContainer *visibleNodes,
                                                                        MeshInfoContainer *visibleGeometry,
                                                                        PatchInfoContainer *visiblePatches,
                                                                        const bool relativeVisibility,
                                                                        const bool approximateVisibility);
    

protected:

        void CollectGeometryVisibility(GtpVisibility::QueryList::iterator &visQueryIt, 
                                                                   GtpVisibility::QueryList::iterator &projQueryIt,
                                                                   GeometryVector *geometryList, 
                                                                   MeshInfoContainer *visibleGeometry,
                                                                   bool relativeVisibility);

        void CollectNodeVisibility(GtpVisibility::QueryList::iterator &visQueryIt, 
                                                           GtpVisibility::QueryList::iterator &projQueryIt,
                                                           GtpVisibility::NodeVector *nodeList, 
                                                           NodeInfoContainer *visibleNodes,
                                                           bool relativeVisibility);


        void CollectPatchVisibility(GtpVisibility::QueryList::iterator &visQueryIt, 
                                                                GtpVisibility::QueryList::iterator &projQueryIt,
                                                                PatchVector *patchList, 
                                                                PatchInfoContainer *visiblePatches,
                                                                bool relativeVisibility);

        void RemoveDuplicateNodes(NodeInfoContainer *visibleNodes);
        void RemoveDuplicateGeometry(MeshInfoContainer *visibleMesh);
        void RemoveDuplicatePatches(PatchInfoContainer *visiblePatches);

        /** Returns the patches of the geometry of a given node. 
                @param node the node containing the patches
                @param patchList the patches are returned in this list
        */
        virtual void GetNodePatchList(GtpVisibility::HierarchyNode *node,       
                                                                  PatchVector *patchList);

};

} // namespace Ogre

#endif // OcclusionQueriesQueryManager