source: trunk/VUT/GtpVisibilityPreprocessor/src/ViewCell.h @ 261

#ifndef _ViewCell_H__
#define _ViewCell_H__

#include "Intersectable.h"
#include "Containers.h"

class Mesh;

//namespace GtpVisibilityPreprocessor {
  
class BspInterior;
class BspPvs;
struct Triangle3;
/**
        View cell represented as a mesh
*/
class ViewCell: public Intersectable
{
public:
        /** Default constructor taking a mesh which represents the shape of
                the viewcell.
        */
        ViewCell(Mesh *mesh);

        /** Returns pointer to the mesh which represents the shape of the viewcell.
        */
        Mesh *GetMesh();

        /** Returns pointer to PVS. 
                @returns PVS, i.e., the visible BSP tree nodes.
        */
        BspPvs *GetPVS();

        AxisAlignedBox3 GetBox();
  
        int CastRay(Ray &ray);
  
        bool IsConvex();
        bool IsWatertight();
        float IntersectionComplexity();

        int Type() const;

        void GetRandomSurfacePoint(Vector3 &point, Vector3 &normal);

        /** Derives viewcells from object container.
                @param objects the intersectables the viewcells are derived from
                @param viewCells the viewcells are returned in this container
                @param maxViewCells if > 0, indicates the maximim number of viewcells that will be created
        */
        static void DeriveViewCells(const ObjectContainer &objects, 
                                                                ViewCellContainer &viewCells, 
                                                                const int maxViewCells);

        /** Constructs view cell from base triangle. The ViewCell is extruded along the normal vector.
                @param the base triangle
                @param the height of the newly created view cell
        */
        static ViewCell *ExtrudeViewCell(const Triangle3 &baseTri, const float height);

protected:

        /// the mesh defining the geometry of this viewcell
        Mesh *mMesh;
        /// the PVS (i.e., the visible bsp tree nodes)
        BspPvs *mPvs;

};
  
//}; // GtpVisibilityPreprocessor

#endif