First BSP tree test case
Visual bps example before
Fix trackball bug
Boundary?
Region example scaffold
Intersection example
Region intersection
2D vertex and plane
* -> *3D
Constructing a 2D polygon
2D Polygon Split
renamed 3d examples
Split 2D examples
More 2D split examples
first 2d region example (ish)
First 2D BSP intersection
refactor
Clone BSP tree
Union!
Region example progress