source: GTP/trunk/App/Demos/Vis/FriendlyCulling/src/LODInfo.h @ 2856

#ifndef __LODINFO_H
#define __LODINFO_H

#include "common.h"
#include "Vector3.h"


namespace CHCDemoEngine 
{

/** Class representing information about an LOD level.
        The distance parameter indicates the distance where this
        lod level is invoked - if the parameter value is smaller or equal 
        than the distance to the view point.
*/
struct LODLevel
{
        friend class SceneEntity;

public:
        
        LODLevel(float squaredDist): mSquaredDistance(squaredDist), mNumTriangles(0) {}

        inline float GetSquaredDistance() const { return mSquaredDistance; }

        inline int GetNumShapes() const { return (int)mShapes.size(); }
        
        inline int GetNumTriangles() const { return mNumTriangles; }

        inline Shape *GetShape(size_t i) const { return mShapes[i]; }

        inline ShapeContainer &GetShapes() { return mShapes; }

        void AddShape(Shape *shape);


        ////////////////

        /** Has to be called each frame in order to initialize the proper LOD level.
        */
        static void InitFrame(const Vector3 &viewPoint);


protected:

        static Vector3 sViewPoint;
        /** The current frame id is used to update LOD.
        */
        static int sFrameId;


        /////////////////////

        int mNumTriangles;

        /// distance of this LOD level
        float mSquaredDistance;
        /// shapes belonging to this LOD level
        ShapeContainer mShapes;
};

}

#endif // __LODINFO_H