Search found 5 matches

by dysphras
Thu Jun 12, 2008 8:52 am
Forum: Stella Forum
Topic: did you know these?
Replies: 0
Views: 10078

did you know these?

Slice (at 0.5) a 5-Hi (120-cell) with a hyperplane direction cell-1st. Do the same to a 6-Ex (600-cell), same depth but direction vertex-1st this time. Save the two slices (polyhedra) for comparing. The 1st is the dual polyhedron of the latter and vice-versa. I've not gotten the exact same scale but...
by dysphras
Thu Jun 12, 2008 8:29 am
Forum: Stella Forum
Topic: non-tetrahedrizable polyhedron
Replies: 2
Views: 11700

Cool, I didn't know there was such a thing. I believe it always works in 2D, that any non self-intersecting polygon can be divided into triangles just using the original vertices. I hadn't realised that the equivalent wasn't always possible in 3D. Glad you liked it. I will try to post here hopefull...
by dysphras
Wed Jun 11, 2008 11:08 am
Forum: Stella Feature Requests
Topic: Creating convex polychora from vertices
Replies: 14
Views: 41605

polychora from OFF vertex coordinates and cell description

Stella4D is a great program - One feature I would like to see added is the ability to generate a convex polychoron, by using only the vertices - sort of a convex hull feature. _________________ May the Fourth (dimension) be with you. I was just dreaming about the same matter. I would love to see th...
by dysphras
Wed Jun 11, 2008 10:52 am
Forum: Stella Forum
Topic: non-tetrahedrizable polyhedron
Replies: 2
Views: 11700

non-tetrahedrizable polyhedron

Hi everybody, Here are the coordinates for the celebrated *Schonhardt's non- tetrahedrizable polyhedron*. Please copy the following in *txt* format, save with the extension *off* and open it with Stella. It's dead simple. Enjoy! 8) Schonhardt's polyhedron: 6 8 12 0.0 1.0 0.82644582514053474004 0.866...
by dysphras
Tue Jun 10, 2008 8:55 am
Forum: Stella Forum
Topic: Császár and Szilassi Polyhedra
Replies: 8
Views: 33218

Császár and Szilassi Polyhedra

Here is the OFF contents for Szilassi and Csaszar polyhedra: Szilassi: 14 7 21 12.0 0.0 12.0 -12.0 0.0 12.0 0.0 12.6 -12.0 0.0 -12.6 -12.0 2.0 -5.0 -8.0 -2.0 5.0 -8.0 3.75 3.75 -3.0 -3.75 -3.75 -3.0 4.5 -2.5 2.0 -4.5 2.5 2.0 7.0 0.0 2.0 -7.0 0.0 2.0 7.0 2.5 2.0 -7.0 -2.5 2.0 6 0 1 13 8 7 4 6 0 4 3 2...