Initial

proto/source/GEOM.HPP

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+#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