基本变换
平移矩阵(translation matrix）
用于创建平移矩阵的D3DX函数
D3DXMATRIX * pOut, //result
FLOAT x, //Number of units to translate on x-axis
FLOAT y, //Number of units to translate on y-axis
FLOAT z //Number of units to translate on z-axis
)
旋转矩阵（rotation matrix）
D3DXMATRIX *pOut, //result
FLOAT Angle //Angle of rotation measured in radians
};
比例变换矩阵 （Scaling Matrix）
D3DXMATRIX * pOut , // result.
FLOAT sx, //Number of units to translate on x-axis
FLOAT sy, //Number of units to translate on y-axis
FLOAT sz //Number of units to translate on z-axis
);
向量变换的函数
D3DXVec3TransformCoord 函数对点进行变换， 并假定向量的第个分量为1。
D3DXVECTOR3 * pOut, //result
CONST D3DXVECTOR3* pv, // The point to transform
CONT D3DXMATRIX * pM //The transformation matrix
);
D3DXMATRIX T(…); //initialize a transformation matrix
D3DXVECTOR p(…); //initialize a point
D3DXVec3TransformCoord (&p, &p, &T); //transform the point
D3DXVec3TransformNormal用于向量的变换， 并假定微量的第4个分量为0
D3DXVECTOR3 *pOut, // result.
CONST D3DXVECTOR3* pv, // The vector to transform
CONT D3DXMATRIX * pM //The transformation matrix
);
D3DXMATRIX T(…); //initialize a transformation matrix
D3DXVECTOR v(…); //initialize a vector
D3DXVec3TransformCoord (&v, &v, &T); //transform the point
用于点数组的函数
D3DXVECTOR3* pOut,
UINT OutStride,
CONST D3DXVECTOR3* pV,
UINT VStride,
CONST D3DXMATRIX* pM,
UINT n
);
pOut
[in, out] Pointer to the D3DXVECTOR3 structure that is the result of the operation.
OutStride
[in] Stride between vectors in the output data stream.
pV
[in] Pointer to the source D3DXVECTOR3 array.
VStride
[in] Stride between vectors in the input data stream.
pM
[in] Pointer to the source D3DXMATRIX structure.
n
[in] Number of elements in the array.
用于向量的数组的变换：
D3DXVECTOR3* pOut,
UINT OutStride,
CONST D3DXVECTOR3* pV,
UINT VStride,
CONST D3DXMATRIX* pM,
UINT n
);
pOut
[in, out] Pointer to the D3DXVECTOR3 array that is the result of the operation.
OutStride
[in] Stride between vectors in the output data stream.
pV
[in] Pointer to the source D3DXVECTOR3 array.
VStride
[in] Stride between vectors in the input data stream.
pM
[in] Pointer to the source D3DXMATRIX structure. To transpose a normal with a non-affine matrix, this matrix should be a transposed-inverse transformation matrix.
n
[in] Number of elements in the array.
查看DirectX9.0 3D SDK
《DirectX 9.0 3D游戏开发编程基础》 笔记
江西理工大学 FangSH