www.pudn.com > 3D_Tank.rar > Arithmetic.h

#ifndef __ARITHMETIC_H__ 
#define __ARITHMETIC_H__ 
 
#include 
#include 
 
struct Box 
{ 
		D3DXVECTOR3 m_vMin;		//左下点 
        D3DXVECTOR3 m_vMax;		//右上点 
}; 
 
//方便函数 
DWORD FtoDw(float f);		//从float转换到DWORD 
float GetRandomFloat(float min, float max);	//获取一定范围内的随机float数 
//生成变换矩阵 
D3DXMATRIX* GenerateTranslationMatrix(D3DXMATRIX *mat, const D3DXVECTOR3 &pos, const float yaw =0.0f ,  
									  const float pitch = 0.0f, const float roll = 0.0f); 
 
//获得变换矩阵的look、up、right 
VOID GetThreeDirFromMatrix(D3DXMATRIX *mat, D3DXVECTOR3 *right, D3DXVECTOR3 *up, D3DXVECTOR3 *look); 
//根据look、up、right、pos生成变换矩阵 
D3DXMATRIX* GenerateMatrix(D3DXMATRIX *mat, const D3DXVECTOR3 &right, const D3DXVECTOR3 &up,  
						   const D3DXVECTOR3 &look, const D3DXVECTOR3 &pos); 
 
//几何体碰撞测试 
BOOL IsPointInBox(const D3DXVECTOR3 &point, const Box &box); 
BOOL BoxTest(const Box &box1, const Box &box2); 
 
//游戏相关 
VOID GetRotationAngle(const D3DXVECTOR3 &vTarget, float *fPitch, float *fRoll); 
												//获得变换角度 
#endif	//Arithmetic