cad/openvsp: update to 3.28.0

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