FediFriendos,
I want to relearn Linear Algebra after like 25 years. At my highest #math ability I had a decent handle on integral calculus but again, it's been a long time. My main goal is to have better intuition about how to do weird and lovely things with #GPU fragment #shaders and actually have intuition about it.
Anyone have a good book or other resource they recommend?
I've begun my profile on Shadertoy as Nom, my first one is here <<https://www.shadertoy.com/view/WcKSzd >> There was a time when I had no idea how to plot the Mandelbrot set so it seems appropriate to start with it. #shadertoy #OpenGL #shaders #nomxd #Tech-talk
Tetrahedral symmetry requires that a general point be in a set of 12 -- on each of the 4 faces in each of 3 orientations. You can also add 4 points at the vertices, 4 at each face center, or 6 at each edge center. Combined, any even number of points >= 4 can be arranged with tetrahedral symmetry, albeit not always evenly.
Here is 50 points in tetrahedral symmetry which requires that some of them have valence 7.
LucasArts games emulator DREAMM 4.0 is in beta and it's time to give it some more attention.
Run all retro LucasArts games on Linux/Mac/Windows.
If you want to help and especially if you are a fan of any of the games below, please try them out.
NEW network feature in 4.0!
Play cross-platform against each other!
Outlaws
Dark Forces II: Jedi Knight
Mysteries of the Sith
X-Wing vs. TIE Fighter
X-Wing Alliance
Rebellion
Star Wars: Racer
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#LucasArts #Emulation #Win98 #Win95 #DOSBox #MS-DOS #Lucasfilm #Games #DOS #Adventures #StarWars #Retro #RetroGaming #CRT #Shaders #RolandMT32 #RolandSC-55 #86box #PCem
50 vertices arranged in D6 symmetry is interesting in that it forms two different but close in length triangle strips -- one following the longitudes and the other the latitudes.
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And 22 vertices can also arrange with 2-fold cylindrical symmetry that runs all the pentagons together into one long strip. It produces one long triangle strip and three short ones.
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22 vertices can also arrange with 2-fold dihedral symmetry with two strips of six pentagons each separated by a single loop of 10 hexagons. The triangulation has two long triangle strips and two short ones.
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40 vertices in tetrahedral symmetry gives a mix of the two with 4 strips that wrap twice and three that only wrap once.
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22 vertices can also have tetrahedral symmetry, but now only have four strips that each wrap the sphere twice.
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16 vertices gives a triangulation with tetrahedral symmetry. It has 7 triangle strips.
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In contrast, the 12-vertex icosahedron has 6 triangle strips.
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