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I'm not interested in Julia, but this is pretty awesome stuff. It looks like it is built right on top of OpenGL and WebGL. How foes one go about learning to accomplish and develop this type of thing?

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Makie is a actually the front end and there are multiple backbends to choose from. I use OpenGL for interactive but Cairo for publishing figures

Right, but that means that someone implemented the backend interface.

Also, does Cairo support all the features? I thought Cairo only supports 2D graphics, but I see several 3D style graphics in the demos.

I recall seeing something that built on Cairo and provided something that had basic 3d interaction on top of an iterative 2d render a long time ago. So there are projects that do more direct implementations but I'm not sure if they have stable glue to Make yet. This is the sort of thing I hate dealing with directly so I usually just say, " hey that's interesting" and wait for a stable release

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