Constructive solid geometry on meshes using BSP trees in Cython CSG.
What is Cython-CSG
CSG stands for Constructive Solid Geometry. It allow Boolean operations to be made on a 3D object like subtraction.
A simple subtraction is as followed
from _cython_csg import CSG a = CSG.cube() b = CSG.cube([0.5, 0.5, 0.0]) c = a - b c.saveVTK('subtract.vtk')
A Simple Union would is as followed
from _cython_csg import CSG a = CSG.sphere(center=[0.5, 0.5, 0.5], radius=0.5, slices=8, stacks=4) b = CSG.cylinder(start=[0.,0.,0.], end=[1.,0.,0.], radius=0.3, slices=16) a.union(b).saveVTK('union.vtk')
You can make custom object here is a example
from _cython_csg import BSPNode, Polygon, Vertex v0 = Vertex([0., 0., 0.]) v1 = Vertex([1., 0., 0.]) v2 = Vertex([1., 1., 0.]) p0 = Polygon([v0, v1, v2]) polygons = [p0] node = BSPNode(polygons)
if you then want to convert it back to a CSG object you can do
To build run
python setup.py build python setup.py install
To view the output I would recommend a program like ParaView
Patches are welcome for the source code or for the documentation