ID3DXPRTCompBuffer::ExtractPCA

Extracts the per-sample principal component analysis (PCA) projection coefficients from an ID3DXPRTCompBuffer compressed data buffer.

HRESULT ExtractPCA(
  UINT StartPCA,
  UINT NumExtract,
  FLOAT * pPCACoefficients
);

Parameters

StartPCA

[in] Starting index for PCA projection coefficients to extract from the buffer.

NumExtract

[in] Number of PCA projection coefficients to extract from the buffer.

pPCACoefficients

[in] Pointer to the location where clustered principal component analysis (CPCA) coefficients are written. The size of the data written is (Number of Samples) * (Number of PCA Coefficients).

Return Values

If the method succeeds, the return value is S_OK. If the method fails, the following value will be returned.

Requirements

Header: Declared in D3dx9mesh.h.