#ifndef _SCENEQUERY_H__
#define _SCENEQUERY_H__

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


namespace CHCDemoEngine
{

class RenderTraverser;
class RenderState;

/** 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,
		       RenderState *state);

	~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;
	float *mDepth;

	RenderState *mRenderState;
};

}

#endif