D3DXSHScale function
Scales a spherical harmonic (SH) vector; in other words, pOut[i] = pA[i]*Scale.
Syntax
FLOAT* D3DXSHScale( _In_ FLOAT *pOut, _In_ UINT Order, _In_ const FLOAT *pIn, _In_ const FLOAT Scale );
Parameters
- pOut [in]
-
Type: FLOAT*
Pointer to Spherical harmonic (SH) output coefficients. The evaluation generates Order2 coefficients. See Remarks.
- Order [in]
-
Type: UINT
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.
- pIn [in]
-
Type: const FLOAT*
Pointer to the SH vector to scale.
- Scale [in]
-
Type: const FLOAT
Pointer to the scale value.
Return value
Type: FLOAT*
Pointer to SH output coefficients.
Remarks
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.
Requirements
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See also
Build date: 11/28/2012
