OCCT: Scratch

Repo for testing occt + emacs +org-babel. The goal is to enable loading the environment for passing TCL scripts to OCCT from org-mode.

This should allow the generation of fairly simple shapes with simple operations – but anything more complex than fillets with edge specification or simple boolean operations will probably require code that’s unmaintainable. The idea behind the workflow is to use OCCT to parametrically produce simple models which can be imported into other CAD programs.

Notes

Either use buffer-env or guix shell -Df guix.scm to establish the environment.

OCCT Environment

Run ls -al $GUIX_ENVIRONMENT after loading guix shell to see what’s there.

Env Scripts

• $GUIX_ENVIRONMENT/bin/custom_gcc_64.sh
• $GUIX_ENVIRONMENT/bin/custom.sh
• $GUIX_ENVIRONMENT/bin/DRAWEXE
• $GUIX_ENVIRONMENT/bin/draw.sh
• $GUIX_ENVIRONMENT/bin/env.sh

OCCT Tests

• The DRAWEXE application basically is the test harness.
• See Draw Test Harness in docs and Doxygen for Draw class.

OCCT Draw

Running draw.sh starts a console and the GUI. To do so, it loads the env.sh, custom.sh, and custom_gcc_64.sh scripts, in order. In the console or GUI, you’ll need to run pload ALL to load all (some?) functionality.

NOTE: either some environment details are not being properly loaded. e.g. some GUI interactions are not enabled. Perhaps some packages are missing from the guix.scm propagated inputs.

TCL Commands

TCL commands are entered into the console.

Draw general commands

pload

load script/module

help

get help on commands

help help

get help on help

spy

record TCL macros into a file

Data Exchange

Commands for loading IGES/STEP files

Geometry Commands

This will be more interesting if data is loaded from a file

• beziercurve
• bsplinecurve

Errors

The docs mention that =$CASROOT/src/

Clicking anything in “File” :: bgerror failed to handle background error.

Clicking Samples > View Samples :: Original error: no files matched glob pattern “*.tcl”