cadquery imprint

[shimwell]

We should make use of the latest cadquery innovations such as imprinting which is proposed on this PR https://github.com/CadQuery/cadquery/pull/1353

To test this we need ocp version 7.7.1 which is on the dev label for the cadquery channel and can be installed like this

conda install -c "cadquery/label/dev" ocp

[shimwell]

To install all the packages needed for testing

conda env create --file environment.yml 

name: cadquery-dev
channels:
  - cadquery/label/dev
  - cadquery
  - conda-forge
dependencies:
  - python=3.9
  - ipython
  - ocp=7.7.1
  - occt=7.7.1
  - pyparsing>=2.1.9
  - sphinx=5.0.1
  - sphinx_rtd_theme
  - black=19.10b0
  - click=8.0.4
  - mypy
  - codecov
  - pytest
  - pytest-cov
  - ezdxf
  - ipython
  - typing_extensions
  - nptyping=2.0.1
  - nlopt
  - path
  - casadi
  - multimethod >=1.7,<2.0
  - python-gmsh
  - gmsh

Then I run pip install to get the branch of cadquery installed

pip install git+https://github.com/CadQuery/cadquery.git@imprinting

I also need openmc with DAGMC for the testing

conda install -c conda-forge -y "openmc=0.13.3=dagmc*nompi*"

[shimwell]

@adam-urbanczyk I figured out how to install from a label using conda, see comments above for a yml example or a command line example. So I shall get on with testing now.

[shimwell]

This screenshot shows two cubes in contact that are imprinted and then can be passed in memory to gmsh and meshed.

Note gmsh finds 12 faces to mesh which is the correct number.