source: GTP/trunk/App/Demos/Vis/FriendlyCulling/src/SceneQuery.h @ 2806

#ifndef _SCENEQUERY_H__
#define _SCENEQUERY_H__

#include "common.h"
#include "AxisAlignedBox3.h"


namespace CHCDemoEngine
{

class RenderTraverser;


/** A simple class that computes the first intersection of a horizontal ray with
        the scene. Can be used to "drop" objects in the scene.
*/
class SceneQuery
{
public:

        SceneQuery(const AxisAlignedBox3 &sceneBox, RenderTraverser *traverser);
        ~SceneQuery() { DEL_ARRAY_PTR(mDepth); }

        /** Calculates intersection of vertical ray at position pt.x, pt.y and 
            stores the intersection point if valid. returns true if the intersection 
                is valid.
        */
        bool CalcIntersection(Vector3 &pt);


protected:

        void Prepare(RenderTraverser *traverser);


        ///////////

        AxisAlignedBox3 mSceneBox;

        unsigned char *mDepth;
};

}

#endif