X3D CAD Macro-Parametric Approach for Translation
From Web3D.org
Macro-Parametric Approach for CAD Translation
The Macro-Parametric Approach (MPA) for CAD Translation is a way to achieve compatible CAD model exchange among a variety of mutually incompatible CAD systems.
We are studying how MPA might be used for converting diverse CAD models into X3D form.
To learn more about MPA, please to go to the Macro-Parametric Approach website.
The person in charge of MPA for X3D is currently YooKyung Jo, iCAD Lab.
Steps involved in translation
- Neutral XML file representing a parametric model is generated from various CAD systems' preprocessor programs using MPA.
- This neutral XML file is parsed by a central application called TransCAD which comprises of modules of ACIS, HOOPS, Constraint Manager, and Persistent Naming.
- With the help of ACIS APIs, an explicit representation (facets) of the model is generated.
- These facets are then structured into a Delaunay triangularized mesh using TETGEN.
- The mesh is then optimized by decimating the mesh and maintaining a decent enough visual quality using various algorithms in MeshLab.
- Finally, meshes are rendered in X3D using IndexedFaceSet.
