ChangeLog: http://openvsp.org/blogs/announcements/2022/05/31/openvsp-3-28-0-released
Features
* API RST volumetric coordinate evaluation XYZ=f(RST)
* API RST coordinate inversion RST=f(XYZ)
* API LMN/RST coordinate conversion
* API for component inside/outside check
* Structures GUI much faster
* Finite line subsurfaces – also in structures
* Orthotropic material support in GUI
* Write orthotropic materials to NASTRAN and CalculiX
* Specify material orientation method on per-part basis
* Write material orientation information for CalculiX
* Node and element offsets for FEA files
* Add FEA part and mesh trimming by other structural parts
* Increased verbosity of output during intersection and meshing
Library Updates
* AngelScript updated to 2.35.1
* nanoflann updated to 1.4.2
Bug Fixes
* Fix specification of fixed points in FEA mesh
* Rewrite MergeBorderEndPoints to be fast
* Prevent infinite loop in Triangle that would cause crashes
* Fix crashes from intersection / meshing console
* Add more debugging output for intersection / meshing process
* Fix default Calculix file extension
* Only write utilized materials to CalculiX files
* Fix setting airfoil points from Python API
* Fix problem with CompGeom and negative components with half mesh
* Many small bug fixes and cleanups
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