D3DXTessellateTriPatch Function

Tessellates a triangular higher-order surface patch into a triangle mesh.

Syntax

HRESULT D3DXTessellateTriPatch(      

    LPDIRECT3DVERTEXBUFFER9 pVB,
    CONST float *pNumSegs,
    LPD3DVERTEXELEMENT9 pInDecl,
    CONST D3TRIPATCH_INFO *pTriPatchInfo,
    LPD3DXMESH pMesh
);

Parameters

pVB
[in] Vertex buffer containing the patch data.
pNumSegs
[in] Number of segments per edge to tessellate.
pInDecl
[in] Vertex declaration structure that defines the vertex data. See D3DVERTEXELEMENT9.
pTriPatchInfo
[in] Describes a triangle patch. See D3DTRIPATCH_INFO.
pMesh
[in, out] Pointer to the created mesh. See ID3DXMesh.

Return Value

If the function succeeds, the return value is D3D_OK.
If the function fails, the return value can be one of the following values.
D3DERR_INVALIDCALL The method call is invalid. For example, a method's parameter may have an invalid value.
E_OUTOFMEMORY Microsoft?Direct3D?could not allocate sufficient memory to complete the call.

Remarks

Use D3DXTriPatchSize to get the number of output vertices and indices that the tessellation function needs.

Function Information

Header d3dx9mesh.h
Import library d3dx9.lib
Minimum operating systems Windows 98

D3DERR_INVALIDCALL	The method call is invalid. For example, a method's parameter may have an invalid value.
E_OUTOFMEMORY	Microsoft?Direct3D?could not allocate sufficient memory to complete the call.

Header	d3dx9mesh.h
Import library	d3dx9.lib
Minimum operating systems	Windows 98