D3DXSHDot function (D3dx9math.h)
Computes the dot product of two spherical harmonic (SH) vectors.
Syntax
FLOAT D3DXSHDot(
_In_ UINT Order,
_In_ const FLOAT *pA,
_In_ const FLOAT *pB
);
Parameters
-
Order [in]
-
Type: UINT
Order of the spherical harmonic (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.
-
pA [in]
-
Type: const FLOAT*
Pointer to the first SH vector.
-
pB [in]
-
Type: const FLOAT*
Pointer to the second SH vector.
Return value
Type: FLOAT
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
| Requirement | Value |
|---|---|
| Header |
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| Library |
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See also