#ifndef OSGUTIL_XJSimplePolytopeIntersector
#define OSGUTIL_XJSimplePolytopeIntersector 

#include <osgUtil/IntersectionVisitor>
#include <osgUtil/PolytopeIntersector>

namespace osgUtil
{


//此求交器只用来计算多边形内部选中的对象，更深层的信息不计算
class  XJSimplePolytopeIntersector : public PolytopeIntersector
{
public:
		/** Construct a XJPolytopeIntersector using specified polytope in MODEL coordinates.*/
		XJSimplePolytopeIntersector(const osg::Polytope& polytope);

		/** Construct a XJPolytopeIntersector using specified polytope in specified coordinate frame.*/
		XJSimplePolytopeIntersector(CoordinateFrame cf, const osg::Polytope& polytope);

		/** Convenience constructor for supporting picking in WINDOW, or PROJECTION coordinates
		* In WINDOW coordinates (clip space cube) creates a five sided polytope box that has a front face at 0.0 and sides around box xMin, yMin, xMax, yMax.
		* In PROJECTION coordinates (clip space cube) creates a five sided polytope box that has a front face at -1 and sides around box xMin, yMin, xMax, yMax.
		* In VIEW and MODEL coordinates (clip space cube) creates a five sided polytope box that has a front face at 0.0 and sides around box xMin, yMin, xMax, yMax.*/
		XJSimplePolytopeIntersector(CoordinateFrame cf, double xMin, double yMin, double xMax, double yMax);
		
		virtual void intersect(osgUtil::IntersectionVisitor& iv, osg::Drawable* drawable);

private:

	int m_num;


	};


}  // end namespace

#endif