D3DXSHRotate function (D3DX10.h)
The D3DX (D3DX 9, D3DX 10, and D3DX 11) utility library is deprecated and is not supported for Windows Store apps.
Instead of using this function, we recommend that you use the Spherical Harmonics Math library function XMSHRotate.
Rotates the spherical harmonic (SH) vector by the given matrix.
FLOAT* D3DXSHRotate( _In_ FLOAT *pOut, _In_ UINT Order, _In_ const D3DXMATRIX *pMatrix, _In_ const FLOAT *pIn );
Pointer to Spherical harmonic (SH) output coefficients. The evaluation generates Order² coefficients. This pointer should not alias with pIn. See Remarks.
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.
Type: const D3DXMATRIX*
Pointer to the rotation matrix. The rotation sub-matrix must be orthogonal, with a unit determinant.
Type: const FLOAT*
Pointer to rotated SH coefficients.
Pointer to SH output coefficients.
Each coefficient of the basis function Yₗₘ is stored at memory location l² + m + l, where:
- l is the degree of the basis function.
- m is the basis function index for the given l value and ranges from -l to l, inclusive.