D3DXVec3TransformNormal

Transforms the 3-D vector normal by the given matrix.

D3DXVECTOR3* D3DXVec3TransformNormal(
  D3DXVECTOR3* pOut,
  CONST D3DXVECTOR3* pV,
  CONST D3DXMATRIX* pM
); 

Parameters

pOut

[in, out] Pointer to the D3DXVECTOR3 structure that is the result of the operation.

pV

[in] Pointer to the source D3DXVECTOR3 structure.

pM

[in] Pointer to the source D3DXMATRIX structure.

Return Values

Pointer to a D3DXVECTOR3 structure that is the transformed vector.

Remarks

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.

Requirements

  Header: Declared in D3dx8math.h.
  Import Library: Use D3dx8.lib.