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by cwstirk
Sat Mar 14, 2020 10:33 pm
Forum: Open discussion
Topic: Looking on information on step data structure
Replies: 1
Views: 103

Re: Looking on information on step data structure

These STEP entities are defined in the schemas, the latest are here. https://www.cax-if.org/cax/cax_express.php The CAX-IF recommended practices describe how to use the schemas and what example files look like. https://www.cax-if.org/cax/cax_recommPractice.php However, the recommended practices for ...
by cwstirk
Sun Feb 23, 2020 10:35 pm
Forum: Open discussion
Topic: STEP 242
Replies: 9
Views: 584

Re: STEP 242

I'm looking for a free version fo the Step 242 specification At the moment I use http://www.steptools.com/stds/stp_aim/html/ to read but for automated processing of step data it wqoukld be nice to have the schema as a file and read it by a parser Maybe you can find here some useful information chee...
by cwstirk
Sun Aug 19, 2018 7:28 pm
Forum: Assembly
Topic: Assembly3 preview
Replies: 1495
Views: 157504

Re: Assembly3 preview

easyw-fc wrote:
Fri Aug 17, 2018 11:15 am
I don't think transparency is supported by the standard AP214.
No other cad should be able to export this parameter as STEP file.
STEP does include transparency for surfaces
https://www.cax-if.org/documents/rec_pr ... rg_v15.pdf
by cwstirk
Thu Jun 29, 2017 6:11 am
Forum: Open discussion
Topic: STEP data model
Replies: 3
Views: 493

Re: STEP data model

The cax-if site provided earlier in this thread is a useful free, authoritative source on STEP. However, much is missing including the details of STEP geometry such as surfaces and trimming. If you find good public sources of this or related information, please post and summarize it. FYI, besides th...
by cwstirk
Thu Mar 09, 2017 1:47 am
Forum: Developers corner
Topic: Developing a property set
Replies: 2
Views: 420

Re: Developing a property set

@yorik it would be useful if the FreeCAD way to handle IFC property sets also could handle STEP user defined attributes, which serve a similar purpose.
https://www.cax-if.org/documents/rec_pr ... es_v15.pdf
by cwstirk
Thu Mar 02, 2017 5:08 am
Forum: Draft, Arch & BIM
Topic: Ideas needed: Xref
Replies: 40
Views: 8257

Re: Ideas needed: Xref

The CAX-IF recommended practice for STEP external references is here https://www.cax-if.org/documents/rec_prac_ext_ref_v21.pdf Many CAD modelers, viewers, and translators support STEP external references. https://www.cax-if.org/vendor_info.php?file_id=3&comp_id=5 It contains useful concepts that you...
by cwstirk
Thu Dec 15, 2016 5:59 pm
Forum: Help on using FreeCAD
Topic: Access to 2D Drawing sheets in STEP files
Replies: 11
Views: 2327

Re: Access to 2D Drawing sheets in STEP files

STEP AP201 and AP202 draughting capabilities were incorporated into AP203 edition 2, which is superceded by AP242. However, Normand is right to point out that STEP translator implementations cover only select portions of a schema. Here are references to how draughting is currently implemented in STE...
by cwstirk
Tue May 24, 2016 8:59 pm
Forum: Developers corner
Topic: Open Source CAD exchange format
Replies: 15
Views: 2901

Re: Open Source CAD exchange format

STEP already contains shape definitions for both CSG and parametric feature based procedural geometry. The former includes swept solids and boolean combinations. See the article by Goult on part 42 starting on page 108 that mentions CSG. https://books.google.com/books?id=9NYyBgAAQBAJ&printsec=frontc...
by cwstirk
Thu Apr 28, 2016 4:27 pm
Forum: Help on using FreeCAD
Topic: Geometrical tolerances
Replies: 9
Views: 2188

Re: Geometrical tolerances

When GD&T gets added to FreeCAD, it would be useful to be compatible with the CAX-IF recommended practices for future interoperability with other applications. https://www.cax-if.org/documents/rec_prac_polyline_pres_v23.pdf https://www.cax-if.org/documents/rec_pracs_pmi_v40.pdf The OpenCasCade trans...
by cwstirk
Fri Feb 19, 2016 10:42 pm
Forum: Open discussion
Topic: Google Summer Of Code 2016
Replies: 111
Views: 18462

Re: Google Summer Of Code 2016

Re: STEP translation I am already a mentor for STEPcode under the BRL-CAD umbrella submission for CAX. An interested student has already responded regarding a STEP exporter for BRL-CAD. I would be willing to also consider a student for a STEPcode based FreeCAD exporter, but would need help from a me...

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