CAD interface

There are multiple different ways to interact with a CAD model. A compelete solid can be converted to a tesselated solid. The Open Cascade API has a wealth of ways of creating, exploring and modifying CAD models. Pyg4ometry provides a pybind11 python interface to Open Cascade. As pyg4ometry just wraps OpenCascade classes the manual for OpenCascade are very useful

• https://dev.opencascade.org/doc/overview/html/

• https://dev.opencascade.org/doc/refman/html/

Controlling tesselation

There are two parameters to control the tesselation quality, the linear and angular deviation.

Setting materials

Object names

Two (or more) object within a CAD file can have the same name. This will cause a problem for the GDML (and the Registry).

Tetrahedralisation

Sometimes it is appropriate to use a tetrahedralisation opposed to a surface mesh.

Topology exploration

The topology of solid can be traversed using Open Cascade.