TestValue = StencilBuffer & StencilMask
If (TestValue < StencilRef)
StencilBuffer = (TestValue + 1) & StencilWriteMask
Stencil buffer help
I'm having touble using the read and write masks with the stencil buffer and wanted to clarify how they're used.
Here's my example setting:
D3DRS_STENCILFUNC = D3DCMP_LESS
D3DRS_STENCILPASS = D3DSTENCILOP_INCR
D3DRS_STENCILFAIL = D3DSTENCILOP_KEEP
D3DRS_STENCILMASK = 0x11 (0001 0001)
D3DRS_STENCILWRITEMASK = 0x11
D3DRS_STENCILREF = 0x11
Is this what happens?
Close. You can find more exact formulations at the "Stencil Buffer Techniques" page in the docs.
k, so it looks like the stencil test is actuall
If ((StencilBuffer & StencilMask) < (StencilRef & StencilMask))
The docs didn't explain what gets written out though,
Is it ((StencilBuffer & StencilMask) + 1) & StencilWriteMask
or just (StencilBuffer + 1) & StencilWriteMask
Thanks,
edit:
Also I should add that I'm using DX9. The docs say you can do this, but I have no clue how you're supposed to go about writing your own formula:
[Edited by - Unfadable on May 25, 2007 9:23:31 PM]
If ((StencilBuffer & StencilMask) < (StencilRef & StencilMask))
The docs didn't explain what gets written out though,
Is it ((StencilBuffer & StencilMask) + 1) & StencilWriteMask
or just (StencilBuffer + 1) & StencilWriteMask
Thanks,
edit:
Also I should add that I'm using DX9. The docs say you can do this, but I have no clue how you're supposed to go about writing your own formula:
Quote:
You can write your own formula for the value you want written into the stencil buffer as shown in the following example.
NewStencilBufferValue = (StencilBufferValue & ~StencilWriteMask) |
(StencilWriteMask & StencilOp(StencilBufferValue))
[Edited by - Unfadable on May 25, 2007 9:23:31 PM]
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