source: trunk/VUT/Ogre/include/OgreOcclusionQueriesQueryManager.h @ 316

#ifndef _OcclusionQueriesQueryManager_H__
#define _OcclusionQueriesQueryManager_H__

#include "OgrePlatformQueryManager.h"

namespace Ogre {
  
/**
        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, int itemBufferMode);
    
    void ComputeCameraVisibility(const Camera &camera,
                            GtpVisibility::NodeInfoContainer *visibleNodes,
                            GtpVisibility::MeshInfoContainer *visibleGeometry,
                                GtpVisibility::PatchInfoContainer *visiblePatches,
                            bool relativeVisibility = false);
    
    /** 
        Uses the specified point to execute the visibility query in all directions. 
        @sa ComputeCameraVisibility()
    */
    void ComputeFromPointVisibility(const Vector3 &point,
                               GtpVisibility::NodeInfoContainer *visibleNodes,
                               GtpVisibility::MeshInfoContainer *visibleGeometry,
                                   GtpVisibility::PatchInfoContainer *visiblePatches,
                               bool relativeVisibility = false);
    

protected:

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

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

        void CollectRelativeGeometryVisibilityForItemBuffer(GtpVisibility::QueryList::iterator &projQueryIt,
                                                                                                GtpVisibility::GeometryList *geometryList, 
                                                                                                GtpVisibility::MeshInfoContainer *visibleGeometry);

        void CollectRelativePatchVisibilityForItemBuffer(
                                                                        GtpVisibility::QueryList::iterator &projQueryIt,
                                                                        GtpVisibility::PatchList *patchList, 
                                                                        GtpVisibility::PatchInfoContainer *visiblePatches);

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

        void RemoveDuplicateNodes(GtpVisibility::NodeInfoContainer *visibleNodes);
        void RemoveDuplicateGeometry(GtpVisibility::MeshInfoContainer *visibleMesh);
        void RemoveDuplicatePatches(GtpVisibility::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,       
                                                                  GtpVisibility::PatchList *patchList);

        int mItemBufferMode;
};

} // namespace Ogre

#endif // OcclusionQueriesQueryManager