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How do I view the output of a r.CompositionGraphDebug command?

In the Graphics Programming documentation ( https://docs.unrealengine.com/latest/INT/Programming/Rendering/index.html ) it explains the use of r.CompositionGraphDebug as:

Execute to get a single frame dump of the composition graph of one frame (post processing and lighting).

How do I view the output of this?

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asked Apr 23 '14 at 04:58 PM in C++ Programming

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Using the command r.CompositionGraphDebug outputs the composition graph to both the console and to several *.gml files. These files will be in your Screenshots/ folder.

Example: With the Effects Showcase project open on a Windows machine, after using the command I had the following files in Documents/Unreal Projects/Effects/Saved/Screenshots/Windows/:

  • CompositionLighting_AfterBasePass.gml

  • CompositionLighting_Lighting.gml

  • PostProcessing.gml

  • ReflectionEnvironments.gml

Opening these files in Notepad reveals the comment: "This file can be viewed with yEd from yWorks. Run Layout/Hierarchical after loading."

GML (Graph Modeling Language) is a text file format supporting network data. You can download yEd (just one of the several available GML viewers) at http://www.yworks.com/en/products_yed_about.htm

Opening the PostProcessing.gml file and running the Layout/Hierarchical command got the following output:

alt text

Showing the composition graph for post processing.

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answered Apr 23 '14 at 05:00 PM

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