Control the front and/or back writing of individual bits in the stencil planes.
||-||Specifies whether the front and/or back stencil writemask is updated. Three symbolic constants are valid: |
||-||Specifies a bit mask to enable and disable writing of individual bits in the stencil planes. Initially, the mask is all 1's.|
glStencilMaskSeparate controls the writing of individual bits in the stencil planes. The least significant [math][/math] bits of
mask , where [math][/math] is the number of bits in the stencil buffer, specify a mask. Where a 1 appears in the mask, it's possible to write to the corresponding bit in the stencil buffer. Where a 0 appears, the corresponding bit is write-protected. Initially, all bits are enabled for writing.
There can be two separate
mask writemasks; one affects back-facing polygons, and the other affects front-facing polygons as well as other non-polygon primitives. glStencilMask sets both front and back stencil writemasks to the same values, as if glStencilMaskSeparate were called with
face set to
GL_INVALID_ENUM is generated if
face is not one of the accepted tokens.
glGet with argument
GL_STENCIL_BACK_WRITEMASK , or
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