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D3DXVec3TransformNormal function

Transforms the 3D vector normal by the given matrix.

Syntax


D3DXVECTOR3* D3DXVec3TransformNormal(
  _Inout_       D3DXVECTOR3 *pOut,
  _In_    const D3DXVECTOR3 *pV,
  _In_    const D3DXMATRIX  *pM
);

Parameters

pOut [in, out]

Type: D3DXVECTOR3*

Pointer to the D3DXVECTOR3 structure that is the result of the operation.

pV [in]

Type: const D3DXVECTOR3*

Pointer to the source D3DXVECTOR3 structure.

pM [in]

Type: const D3DXMATRIX*

Pointer to the source D3DXMATRIX structure.

Return value

Type: D3DXVECTOR3*

Pointer to a D3DXVECTOR3 structure that is the transformed vector.

Remarks

This function transforms the vector (pV->x, pV->y, pV->z, 0) by the matrix pointed to by pM.

If you want to transform a normal, the matrix you pass to this function should be the transpose of the inverse of the matrix you would use to transform a point.

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

D3dx9math.h

Library

D3dx9.lib

 

 

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