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Name: Lloyd Wood
Member since: 2005-04-04 14:17:52
Last Login: 2015-08-30 09:20:00

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Homepage: http://personal.ee.surrey.ac.uk/Personal/L.Wood/


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26 Dec 2014 (updated 4 Jan 2015 at 22:39 UTC) »
SaVi seasonal software development.

It's become my habit to use some of the downtime over the year-end break to work on development of the SaVi satellite software that I maintain.

This Christmas, I added a new multi-colour map projection, which is quite pretty to look at in 3D in Geomview, if not as clear or as informative as other renderings.

It's in development code, and snapshots featuring that and a simulation of the equatorial exclusion zone for geostationary satellites are available. I should do a 1.4.7 release early in the new year.

Update: SaVi 1.4.7 was released on 5 January 2015, and available for download.

SaVi on Raspberry Pi.

Discovered that my SaVi satellite constellation visualization software could be installed easily on a Raspberry Pi, which is far more powerful than what I began working on SaVi on, so many years ago.

And that SaVi is now available for a very wide range of architectures.

My PhD work is running on the big screen in the living room. Looks like I've finally gotten satellite TV.

Learned that there's now a 64-bit Cygwin. And that SaVi and Geomview don't work well under it - OpenGL is disabled to prevent a crash, limiting Geomview to software rendering, and there's something odd in Cygwin's piping support that prevents the two applications communicating, unlike 32-bit Cygwin and 32- and 64-bit everything else.

I discovered this while helping out a Geomview user who had naively installed 64-bit using the installer from Cygwin's site, as there was no warning that it was very new and unproven. Still, the instructions for building Geomview under Cygwin have been updated.

Cygwin's an ever-moving target, without stable fixed-point releases that are a known quantity. Exposing users to development may help development, but it doesn't do much for users.

SaVi 1.4.6 is now released. Minor changes and bugfixes. This was necessary to support Cygwin transitioning away from Insight Tcl 8.4 to unix Tcl 8.5. Documenting how to build this on Mac OS X is a moving target, now that the Xcode app requires checking a box before command and compile tools become available. Hopefully the instructions are clear enough.
SaVi 1.4.5 is now released. Minor changes for the most part, accumulated over a few months. Supporting Mac OS X and its buggy Tcl continues to surprise, but now SaVi can build with ActiveTcl installs, it's a less buggy experience than it was.

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