#ifndef _PROTO_GEOMETRY_HPP_
#define _PROTO_GEOMETRY_HPP_
#ifndef _PROTO_FIXEDPOINT_HPP_
#include <proto/fixed.hpp>
#endif

class Geometry
{
public:
  enum {Magic=64,HeightFieldWidth=512,HeightFieldHeight=512,HeightFieldBitShift=9,TerrainScalex2=3,
	      MaxSteps=200};
	Geometry(void);
	virtual ~Geometry();
  int viewPlaneDistance(void)const;
	int deltaSlope(void)const;
	void screenWidth(int screenWidth);
private:
  int mDeltaSlope;
  int mViewPlaneDistance;
};

inline
Geometry::Geometry(void)
: mDeltaSlope(0), mViewPlaneDistance(0)
{
}

inline
Geometry::~Geometry()
{
}

inline
int Geometry::viewPlaneDistance(void)const
{
  return mViewPlaneDistance;
}

inline
int Geometry::deltaSlope(void)const
{
  return mDeltaSlope;
}

inline
void Geometry::screenWidth(int screenWidth)
{
  mViewPlaneDistance=screenWidth/Magic;
	mDeltaSlope=(1.00/(double)mViewPlaneDistance)*FixedPoint::FPMul;
}
#endif