render.SetStencilPassOperation
Description
Sets the operation to be performed on the stencil buffer values if the compare function was successful.
Arguments
Example
This uses the pass operation to blank out everything but what we just drew
hook.Add( "PostDrawOpaqueRenderables", "Stencil Tutorial Example", function()
-- Reset everything to known good
render.SetStencilWriteMask( 0xFF )
render.SetStencilTestMask( 0xFF )
render.SetStencilReferenceValue( 0 )
-- render.SetStencilCompareFunction( STENCIL_ALWAYS )
-- render.SetStencilPassOperation( STENCIL_KEEP )
render.SetStencilFailOperation( STENCIL_KEEP )
render.SetStencilZFailOperation( STENCIL_KEEP )
render.ClearStencil()
-- Enable stencils
render.SetStencilEnable( true )
-- Set the reference value to 1. This is what the compare function tests against
render.SetStencilReferenceValue( 1 )
-- Only draw things if their pixels are NOT 1. Currently this is everything.
render.SetStencilCompareFunction( STENCIL_NOTEQUAL )
-- If something draws to the screen, set the pixels it draws to 1
render.SetStencilPassOperation( STENCIL_REPLACE )
-- Draw our entities. They will draw as normal
for _, ent in pairs( ents.FindByClass( "sent_stencil_test" ) ) do
ent:DrawModel()
end
-- At this point, we cannot draw on top of anything that we have already drawn.
-- So, if we flush the screen, our entities will still be there.
render.ClearBuffersObeyStencil(0, 148, 133, 255, false);
-- Let everything render normally again
render.SetStencilEnable( false )
end )
Output: 
Rust
Steamworks
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