Gyroid Soma Cube Puzzle
by xmbrst, published
Based on emmett's [Dual Gyroid](http://www.thingiverse.com/thing:24366).
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tl dr: I imported emmett's Dual Gyroid into OpenSCAD and built the pieces up there.
The longer story: it was hard to glue individual Dual Gyroids together in OpenSCAD while maintaining simple manifolds. I could get orthogonally adjacent sections to work by doing a union with a 0.1 mm overlap, but as soon as I tried to add a section that would be diagonally adjacent to any other piece would get manifold errors. Through a lot of trial and error I hit on this method:
First I made a simple small piece composed of two of emmett's cubes unioned with 0.1 mm overlap and exported this as an stl. I then unioned several of these two segment pieces together into a chunk big enough to contain any individual soma piece. Then to make each piece I carved it out of the big chunk by taking the intersection of the big chunk with a union of cubes.
Why this worked I don't really know.
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