lpd3dximtsignalcallback.md

description	ms.assetid	title	ms.topic	ms.date
Function prototype used by D3DXComputeIMTFromSignal to describe a user-defined signal in an input mesh's u,v space. The function evaluates a procedural signal of dimension uSignalDimension at the provided u,v coordinate.	97b07dbc-6b84-46d2-acc7-db81d94538f7	LPD3DXIMTSIGNALCALLBACK	reference	05/31/2018

LPD3DXIMTSIGNALCALLBACK

Function prototype used by D3DXComputeIMTFromSignal to describe a user-defined signal in an input mesh's u,v space. The function evaluates a procedural signal of dimension uSignalDimension at the provided u,v coordinate.

Syntax

typedef HRESULT (WINAPI* LPD3DXIMTSIGNALCALLBACK)
     (CONST D3DXVECTOR2 *uv,
      UINT uPrimitiveID,
      UINT uSignalDimension,
      VOID *pUserData,
      FLOAT *pfSignalOut);

Parameters

[in] uv - A pointer to a vector that contains the vertex texture coordinate.

[in] uPrimitiveId - The index of the input triangle on the mesh for which the signal should be calculated.

[in] uSignalDimension - The number of floats to store in the array of signal data (pfSignalOut).

[in] pUserData - The pUserData pointer passed in to D3DXComputeIMTFromSignal.

[out] pfSignalOut - An array of floats, that contains the signal data.

Return Value

This function must be implemented to return S_OK.

Remarks

Be sure to specify the Windows Data Types calling convention when declaring the callback function. Otherwise, stack overflows can occur.

Requirement	Value
Header	d3dx9mesh.h
Import Library	d3dx9.lib

 

Related topics

Callback Functions