Cython-CSG
Cython port of Evan Wallace’s Javascript https://github.com/evanw/csg.js/ and Tim Knip raw Python version https://github.com/timknip/pycsg.
What is Cython-CSG
CSG stands for Constructive Solid Geometry. It allow Boolean operations to be made on a 3D object like subtraction.
Usage
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')Union
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')Custom objects
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
CSG.fromPolygons(node)
Install
To build run
python setup.py build
python setup.py installOther Notes
To view the output I would recommend a program like ParaView
Help required
Patches are welcome for the source code or for the documentation
1 maintainer
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