NIST STEP to X3D Translator (STP2X3D)

The NIST STEP to X3D Translator is an open-source software that translates a STEP (ISO 10303) Part 21 file (.stp or .step) to an X3D (ISO/IEC 19776) file (.x3d) or X3DOM file (.html). Developed at the National Institute of Standards and Technology (NIST), the software is based on the Open CASCADE STEP Processor and written in C++.

Prerequisites

• Open CASCADE Technology (OCCT) 7.6.0 or higher
  • You must rebuild the OCCT solution to regenerate DLL files.
    • vc14 or higher (x64) should be selected.
  • The complete set of DLL files required for STP2X3D to run is as follows.
    • OCCT related: freetype.dll, TKBO.dll, TKBRep.dll, TKCAF.dll, TKCDF.dll, TKernel.dll, TKG2d.dll, TKG3d.dll, TKGeomAlgo.dll, TKGeomBase.dll, TKHLR.dll, TKLCAF.dll. TKMath.dll, TKMesh.dll, TKPrim.dll, TKService.dll, TKShHealing.dll, TKSTEP.dll, TKSTEP209.dll, TKSTEPAttr.dll, TKSTEPBase.dll, TKTopAlgo.dll, TKV3d.dll, TKVCAF.dll, TKXCAF.dll, TKXDESTEP.dll, TKXSBase.dll
    • VC++ related: msvcp140.dll, vcruntime140.dll (vcruntime140_1.dll will also be required when vc141 or higher was used to build.)

Build the STEP to X3D Translator

Windows

• Use CMake 3.12.2 or higher to build the software.
  • vc14 or higher (x64) should be selected for the generator.
• You can also create a new project, include source files, and build the project in Visual Studio.
  • Be sure to use Visual Studio 2015 or 2017 due to std::experimental::filesystem. This should be updated later.
• Additional Directories should be added as follows.
  • Add "OCCTPath\inc" to Additional Include Directories.
  • Add "OCCTPath\win64\vc14\lib" to Additional Library Directories.

Linux (tested Ubuntu 20.10 64bit)

• Use CMake 3.12.2 or higher to build the software.
• Modify lines 5-6 of STP2X3D/CMakeLists.txt to properly set link to OCCT on your local machine.
• Run the following commands from the repository root directory (where this README is located):

mkdir build
cd build  
cmake ..
make

Usage

• NIST STP2X3D is a command line software. Please check out the Usage guide.

Work In Progress

• Setting of adaptive tessellation parameters per each body.
• Translation of geometries (faces, edges) linked to GD&T items.

Contact Information

• Soonjo Kwon, [email protected]
• William Z. Bernstein, [email protected]

Used By

• NIST STEP File Analyzer and Viewer

Reference

• R. R. Lipman, S. Kwon, 2021, STEP File Analyzer and Viewer User Guide (Update 7), NIST Advanced Manufacturing Series, 200-12.

Version

1.10

Disclaimers

NIST Disclaimer