D3DXSHScale
Microsoft DirectX 9.0 SDK Update (October 2004)

D3DXSHScale Function


Scales a spherical harmonic (SH) vector; in other words, pOut[i] = pA[i]*Scale.

Syntax

FLOAT *WINAPI D3DXSHScale(      

    FLOAT *pOut,     UINT Order,     const FLOAT *pIn,     const FLOAT *Scale );

Parameters

pOut
[out] Pointer to SH output coefficients. The evaluation generates Order2 coefficients. 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.
pIn
[in] Pointer to the SH vector to scale.
Scale
[in] Pointer to the scale value.

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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