Rotates the spherical harmonic (SH) vector in the z-axis by the given angle.
FLOAT* D3DXSHRotateZ( _Out_ FLOAT *pOut, _In_ UINT Order, _In_ FLOAT Angle, _In_ const FLOAT *pIn );
- pOut [out]
Pointer to Spherical harmonic (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.
- Angle [in]
Rotation angle in radians. The rotation is performed around the z-axis.
- pIn [in]
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.