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The ID3DXPRTBuffer interface is used as a data buffer to store vertex and pixel data for use with precomputed radiance transfer (PRT) methods and functions.
| Method | Description |
|---|---|
| ID3DXPRTBuffer::AddBuffer | Adds another buffer to the ID3DXPRTBuffer and stores the results in ID3DXPRTBuffer. |
| ID3DXPRTBuffer::AttachGH | Associates an ID3DXTextureGutterHelper object with the ID3DXPRTBuffer object. |
| ID3DXPRTBuffer::EvalGH | Applies stored texture gutter data to an ID3DXPRTBuffer texture buffer. |
| ID3DXPRTBuffer::ExtractTexture | Extracts coefficient data from a color channel of the buffer for a specified range of coefficients, and adds the data to an IDirect3DTexture9 object. |
| ID3DXPRTBuffer::ExtractToMesh | Extracts coefficient data from a single-channel buffer and adds the data to an ID3DXMesh object. |
| ID3DXPRTBuffer::GetHeight | Retrieves the height of the texture, in pixels. |
| ID3DXPRTBuffer::GetNumChannels | Retrieves the number of color channels used in memory to store samples. |
| ID3DXPRTBuffer::GetNumCoeffs | Retrieves the number of scalars per color channel used in memory to store samples. |
| ID3DXPRTBuffer::GetNumSamples | Retrieves the number of vertices (or texels) sampled. |
| ID3DXPRTBuffer::GetWidth | Retrieves the width of the texture, in pixels. |
| ID3DXPRTBuffer::IsTexture | Indicates whether the buffer contains a texture. |
| ID3DXPRTBuffer::LockBuffer | Locks a range of vertex or texel sample data and obtains a pointer to the location in buffer memory. |
| ID3DXPRTBuffer::ReleaseGH | Unassociates an attached ID3DXTextureGutterHelper object with the ID3DXPRTBuffer object. |
| ID3DXPRTBuffer::Resize | Changes the number of samples contained in the buffer. |
| ID3DXPRTBuffer::ScaleBuffer | Multiplies every value in the buffer by a constant value. |
| ID3DXPRTBuffer::UnlockBuffer | Ends the lifespan of the ID3DXPRTBuffer::LockBuffer pointer returned by ID3DXPRTBuffer::LockBuffer. |
The ID3DXPRTBuffer interface is obtained by calling the D3DXCreatePRTBuffer or D3DXCreatePRTBufferTex functions.
The LPD3DXPRTBUFFER type is defined as a pointer to the ID3DXPRTBuffer interface.
typedef interface ID3DXPRTBuffer ID3DXPRTBuffer; typedef interface ID3DXPRTBuffer *LPD3DXPRTBUFFER;
D3DXCreatePRTBuffer, D3DXCreatePRTBufferTex, ID3DXPRTCompBuffer
Header: Declared in D3dx9mesh.h.
Import Library: Use D3dx9.lib.