C2D file schema

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Since Carbide Create is closed source and those of us with programming chops can’t contribute I was thinking there might be a way we could indirectly add functionality by producing tools the interact with CC by programmatically mutating c2d files. I could see additions like:

generating geometry and toolpaths definitions (not g-code) that
1- effectively create a ramp for entries in contour cuts
2- effectively create helical entries for pockets
3- split up pockets into chunks such that something resembling adaptive clearing could be created (a bunch of circular pockets)
4- produce roughing and finish cuts

The file looks to be a pretty typical json format with a small binary blob at the end. So getting started with this task would be a matter of understanding the structure and schema of the document. Is there any official docs on the file format or has anyone put in effort to reverse engineeer?

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No official documentation.

There have been a couple of projects which have written out .c2d files:

The problem is, the file format has been something of a moving target — keeps changing — not sure when the file format will stabilize.

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I will note that the binary on the blob at the end can be discarded w/o issue — it seems to be a 3D preview or something which will automatically be regenerated — deleting it is one of the fixes for files which won’t open.

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