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Questions about scissoring

Last post 04-21-2008 5:55 PM by ArenAzul. 4 replies.
  • 04-21-2008 10:41 AM

    Questions about scissoring

    Reply Quote

    Just to confirm.

    - scissoring is made over the rendertarget and over its depthbuffer too.

    - the smaller the scissoring rectangle, the less work for the GPU.
  • 04-21-2008 11:10 AM In reply to

    Re: Questions about scissoring

    Answer
    Reply Quote

    >the smaller the scissoring rectangle, the less work for the GPU.

    It depends.... if the scissoring reduces the amount of pixels drawn and you have heavy pixel shaders then yes less work. If you are vertex shader heavy then maybe not since the scissoring will be tested after the vertex transformations.

    The ZBuffer News and information for XNA
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  • 04-21-2008 1:03 PM In reply to

    Re: Questions about scissoring

    Reply Quote
    Ok... but i assume the only part where the depthbuffer is written is the scissored rectangle isn't it?
  • 04-21-2008 4:19 PM In reply to

    Re: Questions about scissoring

    Answer
    Reply Quote
    That's correct. Scissoring is like viewport clipping, except it doesn't change the viewport transform.

    Jon Watte, Direct3D MVP kW X-port 3ds Max .X exporter kW Animation source code
  • 04-21-2008 5:55 PM In reply to

    Re: Questions about scissoring

    Reply Quote

    Ok. Thanks all again ^^
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