SetFilter : Fix set menu when UnionFilter is downstream

[johnhaddon]

In the example below, the set menu only shows the sets from the Plane node, because the intermediate UnionFilter node is preventing the UI from realising the filter is also used by ShaderAssignment1.

It looks like there is some decent logic for dealing with this already in FilteredSceneProcessorUI.__selectAffected, so we should perhaps wrap that up so we can reuse it. Perhaps a SceneAlgo::affectedScenes( const FilterPlug * ) method to return all the scenes affected by a filter?

At the same time, we should probably give the __cameras and __lights sets nicer labels in the menu...

import Gaffer
import GafferScene
import IECore
import imath

Gaffer.Metadata.registerNodeValue( parent, "serialiser:milestoneVersion", 0, persistent=False )
Gaffer.Metadata.registerNodeValue( parent, "serialiser:majorVersion", 47, persistent=False )
Gaffer.Metadata.registerNodeValue( parent, "serialiser:minorVersion", 0, persistent=False )
Gaffer.Metadata.registerNodeValue( parent, "serialiser:patchVersion", 0, persistent=False )

__children = {}

__children["Plane"] = GafferScene.Plane( "Plane" )
parent.addChild( __children["Plane"] )
__children["Plane"].addChild( Gaffer.V2fPlug( "__uiPosition", defaultValue = imath.V2f( 0, 0 ), flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )
__children["Camera"] = GafferScene.Camera( "Camera" )
parent.addChild( __children["Camera"] )
__children["Camera"].addChild( Gaffer.V2fPlug( "__uiPosition", defaultValue = imath.V2f( 0, 0 ), flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )
__children["ShaderAssignment"] = GafferScene.ShaderAssignment( "ShaderAssignment" )
parent.addChild( __children["ShaderAssignment"] )
__children["ShaderAssignment"].addChild( Gaffer.V2fPlug( "__uiPosition", defaultValue = imath.V2f( 0, 0 ), flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )
__children["ShaderAssignment1"] = GafferScene.ShaderAssignment( "ShaderAssignment1" )
parent.addChild( __children["ShaderAssignment1"] )
__children["ShaderAssignment1"].addChild( Gaffer.V2fPlug( "__uiPosition", defaultValue = imath.V2f( 0, 0 ), flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )
__children["SetFilter"] = GafferScene.SetFilter( "SetFilter" )
parent.addChild( __children["SetFilter"] )
__children["SetFilter"].addChild( Gaffer.V2fPlug( "__uiPosition", defaultValue = imath.V2f( 0, 0 ), flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )
__children["UnionFilter"] = GafferScene.UnionFilter( "UnionFilter" )
parent.addChild( __children["UnionFilter"] )
__children["UnionFilter"]["in"].addChild( GafferScene.FilterPlug( "in1", defaultValue = 0, minValue = 0, maxValue = 7, flags = ( Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic ) & ~Gaffer.Plug.Flags.Cacheable, ) )
__children["UnionFilter"].addChild( Gaffer.V2fPlug( "__uiPosition", defaultValue = imath.V2f( 0, 0 ), flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )
__children["Plane"]["sets"].setValue( 'A B' )
__children["Plane"]["__uiPosition"].setValue( imath.V2f( -23.2999992, 9.55000019 ) )
__children["Camera"]["sets"].setValue( 'C' )
__children["Camera"]["__uiPosition"].setValue( imath.V2f( 11.6000023, 11.1499996 ) )
__children["ShaderAssignment"]["in"].setInput( __children["Plane"]["out"] )
__children["ShaderAssignment"]["filter"].setInput( __children["SetFilter"]["out"] )
__children["ShaderAssignment"]["__uiPosition"].setValue( imath.V2f( -23.2999992, -11.5140619 ) )
__children["ShaderAssignment1"]["in"].setInput( __children["Camera"]["out"] )
__children["ShaderAssignment1"]["filter"].setInput( __children["UnionFilter"]["out"] )
__children["ShaderAssignment1"]["__uiPosition"].setValue( imath.V2f( 9.79999733, -12.2500019 ) )
__children["SetFilter"]["__uiPosition"].setValue( imath.V2f( -4.59999943, 8.34999847 ) )
__children["UnionFilter"]["in"]["in0"].setInput( __children["SetFilter"]["out"] )
__children["UnionFilter"]["__uiPosition"].setValue( imath.V2f( 19.2999992, -5.44999886 ) )


del __children