OpenVSP 3.5.1 Released

This version has lots of fixes and a handful of features. There is something here for everyone, so update — you don’t want to be left out.

The addition of tessellation clustering control for wings (chordwise and spanwise) will be important to lots of users. This only affects the wireframe and things related to it (DegenGeom, VSPAERO, CompGeom, etc). It does not affect the underlying shape or the surface parameterization.

To do this, NACA 4-digit and CST airfoils types had to be re-parameterized to an equal-arc-length basis. This will change loft with mixed airfoil types and possibly attachment points. An option to recover the old behavior is included.

Cluster is controlled with two parameters (LE/TE or Root/Tip). If you set them =1.0, you get uniform sp… Read more

OpenVSP 3.5.0 Released

A little late for New Years, but just in time for SciTech! I hope to see you in San Diego next week.

OpenVSP 3.5.0 has a bunch of features across the board that should improve usability for a lot of you. High on the list is the ability to import files from OpenVSP v2. This import isn’t perfect*, but it should do the lions share of moving a model from v2 to v3.

On the good looks side of things, this version adds support for Retina display on MacOS, PNG format screen shots, and also saving screen shots at greater than on-screen resolution. This should help improve publication quality figures from OpenVSP.

Features:

  • v2 Import
  • Retina display on MacOS
  • Super-resolution screen shots
  • PNG format screen shots
  • Improved and quantitative view control (repeatable views)
  • Geom Browse
  • Read more

OpenVSP 3.4.1 Released

This bug fix release takes care of handful of problems that some users have hit. One recent bug, the others have been around a while.

Thanks to Jason Welstead for characterizing one bug and to Alex Gary for fixing it.

Bug fixes:

  • Negative volume flag not working for Custom Geoms.
  • Crash on minimize/restore of main window on MacOS.
  • Mixed tolerances in CompGeom causing removal of watertight shapes.
  • Force true closure of six-series airfoils.
  • Read more

OpenVSP 3.4.0 Released

CST for everyone!

OpenVSP 3.4.0 comes with native support for Brenda Kulfan’s CST Airfoil representation. This is an oft-requested and long awaited feature by those doing aero optimization.

CST support is limited to the airfoil class (N1=0.5, N2=1.0) and is only available for Wing-type components for now.

CST airfoils can be promoted exactly or demoted to the closest possible approximation of reduced order. Existing VSP airfoils can be converted to CST using a least squares fit of a specified order.

Airfoils may now be modified via scale, shift, and rotate. These mods are used by the CST fitting to allow the CST curve to be defined on x=[0,1] with start/end at y=0.

These modifications will also allow some interesting alternative uses. With great power comes g… Read more

OpenVSP 3.3.1 Released

Small but mighty!

OpenVSP 3.3.1 may ‘only’ be a bugfix release, but it fixes some really big and longstanding bugs. The fixes are so significant that I considered calling it 3.4.0 — or even 4.0.0!

Whatever you do, update to this version, you’ll be glad you did. Shaded rendering is significantly improved, a few performance improvements, and the problems with 6-series and file airfoils have been fixed.

Bug fixes:

  • Fix various problems with 6-Series and File Airfoil types.
  • Multiple normal vectors at corners and edges for better shading.
  • Improve feature line rendering to reduce artifacts.
  • Eliminate transparent surface rendering artifacts.
  • Tweak adaptive feature lines to improve consistency of results.
  • Add OpenVSP version number to outp
  • Read more

OpenVSP 3.3.0 Released

October surprise! OpenVSP can now export IGES files!

OpenVSP 3.3.0 is the latest feature release of everyone’s favorite
parametric modeling tool. IGES support was made possible via libIGES, a
small library created by Cirilo Bernardo.

I’ve bumped the version number not because this change is monumental,
but because it will require special attention for anyone building VSP
themselves (they must re-build the Libraries to build libIGES).

Unfortunately, IGES file export will not be a CAD-interchange-cure-all.
IGES files will be subject to many of the same pitfalls as STEP files, but
hopefully this will provide another avenue to work with other modelers and
downstream tools.

In addition to IGES files, there are some other features and bug fixes,
every… Read more

OpenVSP 3.2.3 Released

OpenVSP 3.2.3 is a periodic update. Nothing huge here shoving it out the door, but enough good things have accumulated in the last month that a release should be useful to people. Both fixes and features, everyone should update.

Features:

  • Added slew control to skinning. Slew controls the direction of surface curves ‘in’ the surface – where Angle is ‘out’ of the surface.
  • Change default skinning parameters to simulate v2′s Fuse2 component.
  • Export wireframe as Plot3D file (thanks Joe Derlaga)
  • Improve nearest point search algorithms in Code-Eli should help CFDMesh and FitModel.
  • Cache derivative calculations in Code-Eli – should speed CFDMesh some
  • Added reversed triangle detection and removal to CFDMesh
  • Tweaked CFD
  • Read more

OpenVSP 3.2.2 Released

OpenVSP 3.2.2 is another bugfix release. Some small, but a few that have been longstanding problems. Everyone should update to get the benefit of these fixes.

Features:

  • Specify units when writing STEP files.
  • Specify dimensional tolerance when writing STEP files.

Bug fixes:

  • Fix wing updating with zero tip chord, zero taper, etc.
  • VSPAERO Remove additional swirl component in front of actuator disk.
  • Fix airfoil trimming bug introduced in 3.2.1
  • Eliminate divide by zero for trim/closure parameters with zero chord.
  • Fix bug introduced when DegenGeom GUI was made programmatic.
  • Read more

OpenVSP 3.2.1 Released

OpenVSP 3.2.1 is a release of mostly bugfixes. Most of the fixes are small items expected to accompany a big release like 3.2.0. However, the most significant fix has been a problem with all of v3. So, although it is small, everyone should go ahead and update.

Improvements:

  • Background control GUI converted to be programmatic

Bug Fixes:

  • Fix inconsistent orientation of triangles from CompGeom
  • Fix orientation of symmetrical actuator disk normal vectors
  • Improve feature lines and XSec highlights with blunt trailing edges
  • Don’t write un-needed Matlab DegenGeom file for VSPAERO
  • Read more