Hi The Antiprism list is a friendly place to chat about geometry and related topics. It is a place to share ideas and thoughts, a place to request and give...
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Adrian Rossiter
adrianrossiter
Nov 8, 2006 8:10 pm
[reply to a request for information on making tetrahelix animations] It is just a basic Python script to output the model stages of a single chain in OFF...
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Adrian Rossiter
adrianrossiter
Nov 8, 2006 8:10 pm
Hi All If anyone wants to make an animation, the kaleidocycle program is not yet finished but works fine for regular tetrahedra. It is undocumented but...
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Adrian Rossiter
adrianrossiter
Nov 8, 2006 8:29 pm
... I dug out the program that generated this and produced a version with different coloured faces (550k) ...
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Adrian Rossiter
adrianrossiter
Nov 10, 2006 12:41 pm
Hi All I've made a packing animation based on the sequence shown on the cover of this book http://ec1.images-amazon.com/images/P/048623729X.01._SCLZZZZZZZ_.jpg...
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Adrian Rossiter
adrianrossiter
Nov 10, 2006 1:24 pm
Hi All I looked at modelling something close to the tensegrity models I made before http://www.freewebtown.com/adrian/geom/835_tens_models/ but with the cords...
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Adrian Rossiter
adrianrossiter
Nov 11, 2006 8:26 am
Hi All Here are some animations slicing through a single 24-cell, also showing the projection of the edges. Vertex-first (400k) ...
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Adrian Rossiter
adrianrossiter
Nov 11, 2006 8:55 am
Hi All Here is small GLUT based viewer which displays models based on R. Buckminster Fullers jitterbug transformation http://antiprism.com/link/jitterbug_gl ...
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Adrian Rossiter
adrianrossiter
Nov 11, 2006 6:07 pm
... Here is an image that illustrates this better http://www.freewebtown.com/adrian/tmp/ch_cfg02.jpg The parts of the tetrahedron which are external to the ...
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Adrian Rossiter
adrianrossiter
Nov 13, 2006 8:42 am
Hi All There is support in antiview for displaying equal-sized ball packs. Here is a diamond arrangement, and drawn again as a ball pack lattice.py diamond 3...
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Adrian Rossiter
adrianrossiter
Nov 13, 2006 12:20 pm
[part of a message about a helix formed from from chain of tetrahedra hinged at opposite edges] I thought at first it could be a start for an arrangement like ...
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Adrian Rossiter
adrianrossiter
Nov 15, 2006 3:39 pm
Hi All http://www.rwgrayprojects.com/synergetics/s10/figs/f33019.html Alan Holden calls the shape made by the dark triangles a regular nolid in Shapes, Space...
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Adrian Rossiter
adrianrossiter
Nov 15, 2006 4:29 pm
Hi All I have been looking at producing a GUI for my command line programs. It is difficult to decide on a cross-platform set of GUI tools. I have just been...
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Adrian Rossiter
adrianrossiter
Nov 17, 2006 10:45 am
... I have made these changes. The Linux code built fine on Cygwin, without having to make any further changes, and the viewer also works fine. Adrian. -- ...
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Adrian Rossiter
adrianrossiter
Nov 21, 2006 4:24 pm
Hi All The duals of zonohedra are quite nice. The "zones" of faces, joined along edges having a common direction, become rings of co-planar vertices in the...
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Adrian Rossiter
adrianrossiter
Nov 21, 2006 4:57 pm
Hi All I have just released Antiprism 0.10 http://www.antiprism.com/download/ This release includes the new antiview OFF file viewer, a kaleidocycle generator...
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Dick Fischbeck
dick_fischbeck
Nov 21, 2006 10:42 pm
Hi Adrian Good going and congratulations! I have access to a PC at work. Maybe I'll get to try antiprism out. Can just about anyone learn to use it? Dick...
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Adrian Rossiter
adrianrossiter
Nov 22, 2006 9:43 am
Hi Dick ... Thanks. ... The programs vary in their ease of use, but the easier programs are very easy to use. However, someone who wants to use the Antiprism...
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Adrian Rossiter
adrianrossiter
Nov 25, 2006 10:08 am
Hi All Antiprism includes a primitive program for making some sorts of string art. http://www.antiprism.com/programs/string_art.html Here are some models I...
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Adrian Rossiter
adrianrossiter
Nov 25, 2006 11:47 am
Hi All I've been writing a program to generate uniform tilings in 2D. It is unfinished and undocumented but included in the latest release of Antiprism as...
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Adrian Rossiter
adrianrossiter
Nov 25, 2006 2:03 pm
Hi All There is an interesting and accesible book on four dimensional geometry by Thomas Banchoff - Beyond the Third Dimension: Geometry, Computer Graphics,...
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Adrian Rossiter
adrianrossiter
Nov 25, 2006 5:11 pm
... I managed to tile a cross-cap in the following way - 1. Map the base rectangle onto a square. 2. Map the square onto an ellipse with the diagonals of ...
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Adrian Rossiter
adrianrossiter
Nov 25, 2006 7:33 pm
... Should be http://www.freewebtown.com/adrian/tmp/ut_cross_4.jpg Adrian. -- Adrian Rossiter adrian@... Home: http://antiprism.com/adrian...
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watermanpoly
Nov 28, 2006 12:06 pm
Adrian, Nice to see this new group forming. I am quite anxious to get my Antiprism working. I am having troubles as the screen only flashes for most stuff and...
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Adrian Rossiter
adrianrossiter
Nov 28, 2006 7:44 pm
Hi Steve ... You might see this if you pipe some commands together with antiview as the last command, and an earlier command fails. There is nothing for...
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watermanpoly
Nov 29, 2006 2:43 pm
Adrian, I got the viewer working now. I also tried several .exe and they were fine too. I copied lattice2.py and pasted numerous places but could not get it to...
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Adrian Rossiter
adrianrossiter
Nov 29, 2006 6:50 pm
Hi Steve ... It is a Python program, so you have to do what you usually do to run them. Maybe one of python lattice2.py c:\python_dir\python lattice2.py ... ...
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Adrian Rossiter
adrianrossiter
Nov 30, 2006 10:36 am
Hi All In an oriented polyhedron assign a point above and below the mid-point of each edge. Running around the faces join the below point of an edge to the...
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Adrian Rossiter
adrianrossiter
Nov 30, 2006 11:26 am
... I notice that when Yahoo displays the message it doesn't allow lines to wrap, but instead inserts an HTML line break. For me, cutting and pasting from the...
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watermanpoly
Nov 30, 2006 7:35 pm
Adrian, I have been able to get everything working. I am having some troubles with lattice.py and with lattice2.py. lattice2.py fcc 2 9 0,1,0 | conv_hull -a | ...
