Open GL Context.

[rdb]

Use PythonCallbackObject. Example code here:

Panda draw callbacks

Inspired by nik’s efforts to integrate CEGUI, and by queries from other users on-and-off over the years about draw callbacks in Panda, I’ve just added this feature. You can associate a callback function with a DisplayRegion, which will get called when the overall DisplayRegion is drawn (whether or not it includes any geometry), or you can associate a callback function with a particular CallbackNode in the scene graph, which will get called whenever the node is drawn. The node callback even inh…