ABANDONED: Blender isn't robust enough to construct entire objects from lots
of boolean operations; at some point it just starts refusing to execute the
operation and fails with an error.




Old README:

Blender Constructive Geometry. A work-in-progress experiment to offer a
workflow similar to OpenSCAD, but with general modelling being the focus rather
than CAD.

Why? Mostly because OpenSCAD is really slow,... by design: it does arbitary
precision ("exact") calculations via CGAL, but in practice it's not that
useful; compilation speed is more important, and it's not too hard to design
robust CSG operations. Another minor reason is that it's hard to extract
metadata from OpenSCAD; specifically I'd like to export the transform at
various points, but it's not possible without resorting to some dirty hacks.

DONE
 - primitives: cube, sphere, cylinder, torus, polyhedron
 - transforms
 - boolean operations
 - convex hull
 - hi/lo poly passes
 - debug pass

TODO
 - surface smoothing (Blender preserves smoothing information after boolean ops
   and convex hull, so with a smooth cylinder you can cut a smooth hole)
 - debug material for debug pass
 - colored materials for previews?
 - mesh preparation step for doing stuff like face culling, and adding seams
 - UV-unwrap + baking from high-poly mesh (normals, ambient occlusion, ...)
 - texture painting, probably by "splatting" bitmaps onto the mesh
 - image generation; something like a 2D counterpart for creating images
 - instancing pass; scene setup using built objects
 - Godot scene export
 - minkowski sum; convex for starters, non-convex via convex decomposition if I
   feel really adventureous
 - caching? some things should be trivial to cache; I can easily hash the node
   trees from a build script

DEMO
Try:
 $ ./bcg preview examples/test.py