D3DXSHRotate
Microsoft DirectX 9.0 SDK Update (October 2004)

D3DXSHRotate Function


Rotates the spherical harmonic (SH) vector by the given matrix.

Syntax

FLOAT *WINAPI D3DXSHRotate(      

    FLOAT *pOut,     UINT Order,     const D3DXMATRIX *pMatrix,     const FLOAT *pIn );

Parameters

pOut
[out] Pointer to SH output coefficients. The evaluation generates Order2 coefficients. This pointer should not alias with pIn. See Remarks.
Order
[in] Order of the SH evaluation. Must be in the range of D3DXSH_MINORDER to D3DXSH_MAXORDER, inclusive. The evaluation generates Order2 coefficients. The degree of the evaluation is Order - 1.
pMatrix
[in] Pointer to the rotation matrix. The rotation sub-matrix must be orthogonal, with a unit determinant.
pIn
[in] Pointer to rotated SH coefficients.

Return Value

Pointer to SH output coefficients.

Remarks

Each coefficient of the basis function Ylm is stored at memory location l2 + m + l, where:

Function Information

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

See Also

Precomputed Radiance Transfer


© 2004 Microsoft Corporation. All rights reserved.
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