Microsoft DirectX 9.0 |
Before rendering objects in a scene, clear the viewport on the render-target surface or a subset of the viewport. Clearing the viewport causes the system to set the desired portion of the render-target surface and any attached depth or stencil buffers to a desired state. This resets the areas of the surface that will be rendered again, and it resets the corresponding areas of the depth and stencil buffers, if any are in use. Clearing a render-target surface can set the desired region to a default color or texture. For depth and stencil buffers, this can set a depth or stencil value.
Use the IDirect3DDevice9::Clear method to clear the viewport.
For more information about using this method, see Clearing a Viewport.