View source for SourceShaderEditor/Ref nodes PPE

{{DISPLAYTITLE:Source Shader Editor - Post processing node types}}
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This article will provide an overview of post processing nodes of the [[:Category:SourceShaderEditor|shader editor]]. Like it behaves for [[SourceShaderEditor/Ref nodes HLSL|HLSL nodes]], you can hover with your mouse pointer over them to show a tooltip with some more information ingame. The executable flow on a post processing graph cannot be forked. This constraint is realized through the 'master' connections of each node.

== Master nodes ==

'''Post processing input'''
:This is the initial node of a post processing graph. You must connect your first node to this one, it does not have any specific configuration options.

'''Post processing output'''
:The destination node of a post processing graph. Your graph needs to end here or it will be deemed invalid and won't get drawn.

== Rendering nodes ==

'''Draw material'''
:Draws a material onto the current Rendertarget. The reference input RTs are used for automated scaling and viewport correction, they do ''not'' represent input and output 'textures'. You can furthermore perform custom corrections in the nodes properties and also push the target reference RT onto the stack automatically, this means, that the material will be drawn onto that RT.

'''Clear buffers'''
:Clears the current color and or depth buffer. You must not try to clear depth if the active setup uses a 'no depth' RT, doing that will make this operation fail.

'''Render view'''
:Renders the current scene with a custom draw setup onto the current RT. The rendering operations of this node are defined in the client code, you can create arbitrary drawing operations there.

'''Update FB'''
:Copies the current content of the backbuffer onto the framebuffer copy texture, that's the texture that shaders reference by the 'Framebuffer' parameter for textures.

== Viewport nodes ==

The current entry of the viewport [[w:Stack_%28data_structure%29|stack]] defines which Rendertarget and depth buffer to target for rendering. It also allows you to only select a sub rect of that RT.

'''Push viewport'''
:Pushes a specified RT onto the stack and sets its full dimensions for the viewport. This node must be followed by a ''Pop viewport'' node.

'''Pop viewport'''
:Pops the last RT and viewport from the stack, the earlier one will become active. This nodes must be preceded by a ''Push viewport''.

'''Set Rendertarget'''
:Overrides the current RT with the specified one. The last RT will be lost.

== Resource nodes ==

'''Create Rendertarget'''
:Find an RT by name or select one from the combobox.

'''Create Material'''
:Create a material unique to the graph ([[CreateMaterial|allocated procedurally]]) or load a vmt. Both can be edited ingame, saving the node while having a vmt loaded will save to the vmt too!

'''Copy Rendertarget'''
:[[w:Blitting|Blits]] the current RT to another one.