D3DXVec3TransformNormal
Microsoft DirectX 9.0 SDK Update (October 2004)

D3DXVec3TransformNormal Function


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

Syntax

D3DXVECTOR3 *WINAPI 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 Value

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.

Function Information

Headerd3dx9math.h
Import libraryd3dx9.lib
Minimum operating systems Windows 98


© 2004 Microsoft Corporation. All rights reserved.
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