|Microsoft DirectX 9.0|
Transforms the 3-D vector normal by the given matrix.
D3DXVECTOR3 *WINAPI D3DXVec3TransformNormal(
D3DXVECTOR3 *pOut, CONST D3DXVECTOR3 *pV, CONST D3DXMATRIX *pM );
Pointer to a D3DXVECTOR3 structure that is the transformed vector.
This function transforms the vector normal (x, y, z, 0) of the vector, pV, by the matrix, pM.
If you transform a normal by a non-affine matrix, the matrix you pass to this function should be the transpose of the inverse of the matrix you would use to transform a coordinate.
The return value for this function is the same value returned in the pOut parameter. In this way, the D3DXVec3TransformNormal function can be used as a parameter for another function.
Header d3dx9math.h Import library d3dx9.lib Minimum operating systems Windows 98