D3DXVec3TransformNormal

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

D3DXVec3TransformNormal( _ 
    VOut As D3DVECTOR, _ 
    V1 As D3DVECTOR, _ 
    M As D3DMATRIX)

Parameters

VOut

D3DVECTOR type that is the result of the operation, the transformed vector.

V1

The source D3DVECTOR type.

M

The source D3DMATRIX type.

Error Codes

If the function fails, an error is raised and Err.Number can be set to one of the following values.

For information on trapping errors, see the Microsoft® Visual Basic® Error Handling topic.

Remarks

This function transforms the vector normal (x, y, z, 0) of the vector, V1, by the matrix, M.

If you transform a normal by a nonaffine 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.