frustum.h

3D游戏场景的演示原码

#ifndef _FRUSTUM_H
#define _FRUSTUM_H

#include "main.h"

// This will allow us to create an object to keep track of our frustum
class CFrustum {

public:

	// Call this every time the camera moves to update the frustum
	void CalculateFrustum();

	// This takes a 3D point and returns TRUE if it's inside of the frustum
	bool PointInFrustum(float x, float y, float z);

	// This takes a 3D point and a radius and returns TRUE if the sphere is inside of the frustum
	bool SphereInFrustum(float x, float y, float z, float radius);

	// This takes the center and half the length of the cube.
	bool CubeInFrustum( float x, float y, float z, float size );

private:

	// This holds the A B C and D values for each side of our frustum.
	float m_Frustum[6][4];
};


#endif


/////////////////////////////////////////////////////////////////////////////////
//
// * QUICK NOTES * 
//
// This file holds the frustum class prototypes.
// 
// 
// Ben Humphrey (DigiBen)
// Game Programmer
// [e-mail]
// Co-Web Host of www.GameTutorials.com
//
//