3. Python Package Usage, CSG to CAD conversion

The main class is CsgToCad() which converts Constructive Solid Geometry (CSG) to CAD. There are a few arguments that can be passed into the CsgToCad().export_cad() method which are documented in the Python API reference section of the documentation.

If you have install GEOUNED and FreeCAD into your system Python then you can simply run a .py script with Python. The most minimal use case below shows GEOUNED being imported and the CsgToCad being used to convert a CSG geometry into a STEP CAD file. The example makes use of default attributes.

import geouned

geo = geouned.CsgToCad()

geo.export_cad(
    csg_format='openmc_xml',
    input_filename='cylinder_box.xml',
)

Users can change the default arguments to suit the conversion desired. The following example shows a usage with every attributes specified. Remember that the arguments are described in the Python API reference section of the documentation.

import geouned

geo = geouned.CsgToCad()

geo.export_cad(
    input_filename='cylinder_box.xml',
    csg_format='openmc_xml',
    bounding_box=[-1000.0,  -500.0, -1000.0, 0,0,0.0 ],
    cell_range_type='exclude',
    cell_range=(2,3,4),
    output_filename='openmc_xml',
)