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Help : ProcessVertices()

Started by zhaoxinyu Jan 31, 2007 at 5:07 AM 0 replies 850+ views

Original Post

Jan 31, 2007 at 5:07 AM

HRESULT ProcessVertices( UINT SrcStartIndex, UINT DestIndex, UINT VertexCount, IDirect3DVertexBuffer9 *pDestBuffer, IDirect3DVertexDeclaration9* pVertexDecl, DWORD Flags ); I am a newbie for D3D. Could anyone tell me what this function is for, when I should use it. Better with an sample code thanks.

jollyjeffers

245

jollyjeffers

Jan 31, 2007 at 5:35 AM

[google] is your friend - admittedly I know roughly what I'm looking for, but running a quick search on "ProcessVertices" yielded several good results.

Quote:
From the first result returned by Google:

7. When should I use ProcessVertices?
Don’t use it for anything that you’re going to draw! The typical use for ProcessVertices is to transform data which is used for bounding box tests or other tests for which the CPU needs access to post-transform data. If you are using a HAL (and not a T&L HAL) you need to use this for multi-pass effects to avoid repeatedly transforming the vertices.

8. Where does ProcessVertices take place?
Always on the CPU, never on the graphics card. No exceptions.

I believe that answers your question. The SDK documentation should give you all the details you need in order to use it correctly.

Jack

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