D3DXComputeIMTFromPerVertexSignal function
Calculate per-triangle IMT's from per-vertex data. This function allows you to calculate the IMT based off of any value in a mesh (color, normal, etc).
Syntax
HRESULT D3DXComputeIMTFromPerVertexSignal(
_In_ LPD3DXMESH pMesh,
_In_ const FLOAT *pfVertexSignal,
_In_ UINT uSignalDimension,
_In_ UINT uSignalStride,
_In_ DWORD dwOptions,
LPD3DXUVATLASCB pStatusCallback,
LPVOID pUserContext,
_Out_ LPD3DXBUFFER *ppIMTData
);
Parameters
-
pMesh [in]
-
Type: LPD3DXMESH
A pointer to an input mesh (see ID3DXMesh) which contains the object geometry for calculating the IMT.
-
pfVertexSignal [in]
-
Type: const FLOAT*
A pointer to an array of per-vertex data from which IMT will be computed. The array size is uSignalStride * v, where v is the number of vertices in the mesh.
-
uSignalDimension [in]
-
Type: UINT
The number of floats per vertex.
-
uSignalStride [in]
-
Type: UINT
The number of bytes per vertex in the array. This must be a multiple of sizeof(float)
-
dwOptions [in]
-
Type: DWORD
Texture wrap options. This is a combination of one or more D3DXIMT FLAGS.
-
pStatusCallback
-
Type: LPD3DXUVATLASCB
A pointer to a callback function to monitor IMT computation progress.
-
pUserContext
-
Type: LPVOID
A pointer to a user-defined variable which is passed to the status callback function. Typically used by an application to pass a pointer to a data structure that provides context information for the callback function.
-
ppIMTData [out]
-
Type: LPD3DXBUFFER*
A pointer to the buffer (see ID3DXBuffer) containing the returned IMT array. This array can be provided as input to the D3DX UVAtlas Functions to prioritize texture-space allocation in the texture parameterization.
Return value
Type: HRESULT
If the function succeeds, the return value is D3D_OK; otherwise, the value is D3DERR_INVALIDCALL.
Requirements
| Requirement | Value |
|---|---|
| Header |
|
| Library |
|
See also