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]> This document is the API reference for the Graphene library. The latest version of Graphene, as well as the latest version of this API reference, is available online. Graphene is a library of data types commonly used to implement 2D-in-3D as well as full 3D canvases. Graphene only contains math data types, like vectors and matrices; it does not deal with windowing system calls, event handling, drawing, or a full scene graph.