Hi Adrian, I dug up my old program with which I was going to create uniform polyhedra strictly from formula. The method would reuse vertices where possible....
3677
Roger Kaufman
vortexswirling
Oct 1, 2009 9:30 pm
Hi Adrian, Use fixed font on the list. ... It would happen for the dodecahedron and quite a few of the Archimedean's. I realize the vertex set for U64 actually...
3678
Adrian Rossiter
adrianrossiter
Oct 1, 2009 10:47 pm
Hi Steve ... The video works fine. In your video you create a red system of coordinates with the origin of coordinates at +3 in the black coordinate system....
3679
Steve
stevewaterman51
Oct 2, 2009 12:09 am
Adrian, ... Yes. ... Sort of. I start with coincident systems. The black x system and the red x' system. If we place a point in the black system, then by...
3680
Steve
stevewaterman51
Oct 2, 2009 12:29 am
Adrian, here is a sample of what some internet diagrams will look like.. ...
3681
Adrian Rossiter
adrianrossiter
Oct 2, 2009 7:41 am
Hi John ... When you have spent some time with it I would be interested to hear which particular model you have, and how you find its performance for building...
3682
Adrian Rossiter
adrianrossiter
Oct 2, 2009 7:41 am
Hi Roger ... That sounds like it would work out. And each polygon you find determines an edge of a vertex figure and so any circuit of these is a candidate...
3683
Adrian Rossiter
adrianrossiter
Oct 2, 2009 8:57 am
Hi Taff ... VRML is quite handy, as people on so many systems can view the models just by clicking on a link in the message. I am interested to see what will...
3684
Adrian Rossiter
adrianrossiter
Oct 2, 2009 8:57 am
Hi Steve ... Here is the main image http://farside.ph.utexas.edu/teaching/336k/Newton/img448.png In this image x and x' are axis labels, but in your video they...
3685
Adrian Rossiter
adrianrossiter
Oct 2, 2009 8:57 am
Hi Steve ... You place a point on the screen. The coordinate systems are only there to give its location. Any point on the screen is the same point in all...
3686
John Brawley
voodoo1776
Oct 2, 2009 9:52 am
... From: "Adrian Rossiter" <adrian@...> Subject: Re: [antiprism] DosBoxes ... Hi Adrian ... I'll be happy to do that, soon as I finish cleaning all...
Adrian, Given an off file with the point 2,0,0. P = 2 If we use off_trans and move every point in the off file 3,0,0, vt = +3. So, a coordinate transformation...
3689
Steve
stevewaterman51
Oct 2, 2009 12:27 pm
typo... all x,y,z points ARE TRANSFORMED by the value of -T ... Ooops..typo...i copied and pasted...I meant T not -T all x,y,z points ARE TRANSFORMED by the...
3690
Steve
stevewaterman51
Oct 2, 2009 12:56 pm
Adrian, A coordinate/point transformation requires an x,y,z translation. off_trans A coordinate/point transformation requires that its location related to...
3691
Adrian Rossiter
adrianrossiter
Oct 2, 2009 2:41 pm
Hi Steve ... off_trans transforms points in a fixed coordinate system. It is a point transformation and not a coordinate transformation. That is why it adds...
3692
Adrian Rossiter
adrianrossiter
Oct 2, 2009 2:41 pm
Hi John ... I find VRML fast enough for viewing a single model, but a page full of embedded models used to freeze up my old computer. FreeWRL has several...
3693
Roger Kaufman
vortexswirling
Oct 2, 2009 5:12 pm
Hi Adrian, ... I need to check that you are thinking of a vertex figure the same why I am. For instance, the truncated tetrahedron would only require 2...
3694
John Brawley
voodoo1776
Oct 2, 2009 7:14 pm
... From: "Adrian Rossiter" <adrian@...> Subject: Re: [antiprism] Re: Clinton's equal central angle conjecture ... Hi Adrian ... [dels] ... [dels] ...
3695
Steve
stevewaterman51
Oct 2, 2009 11:28 pm
Adrian, re x' = x -vt I made a new page today... http://watermanpolyhedron.com/nadanada1.htm steve...
3696
Adrian Rossiter
adrianrossiter
Oct 3, 2009 8:00 am
Hi Roger ... By vertex figure, I meant the circuit of vertices that are neighbours of a vertex. Just to explain, I thought you were selecting a vertex v0, then...
3697
Adrian Rossiter
adrianrossiter
Oct 3, 2009 8:50 am
Hi Steve ... An apple is five steps in front of you (x=5). You are moving forward at one step per second (v=1). How many steps in front of you (x'=?) is the...
3698
Adrian Rossiter
adrianrossiter
Oct 3, 2009 11:38 am
Hi John ... I was thinking of the points and lines. You can make 3D polyhedral spheres from polygons to represent balls in a ball pack because they don't...
3699
Steve
stevewaterman51
Oct 3, 2009 12:44 pm
Adrian, "An apple is five steps in front of you (x=5). You are moving forward at one step per second (v=1)." However, this is a math problem...with origins and...
3700
Adrian Rossiter
adrianrossiter
Oct 3, 2009 1:25 pm
Hi Steve ... Yes it is a maths question. The question is this: you displace a coordinate system by 'vt', a point has coordinate x in the original system, what...
3701
Adrian Rossiter
adrianrossiter
Oct 3, 2009 1:26 pm
... When I was looking up a stereo Javaview example for John yesterday I came across a 3D-XplorMath applet. It has a long startup time and the display is slow....
3702
John Brawley
voodoo1776
Oct 3, 2009 1:49 pm
From: "Adrian Rossiter" ... Hi Adrian ... I'm sorry; I'm still not 'getting' what you meant by "flat." To me, "flat" in this context would be like "not 3D" or...
3703
Steve
stevewaterman51
Oct 3, 2009 1:54 pm
Adrian, ... x in new = -1, x' in old = 5 but neither is x' = -1 It is x' = x - vt. Disagree. ... NO NO NO...I mean frames that ARE coincident....at t = 0. If...
3704
Adrian Rossiter
adrianrossiter
Oct 3, 2009 2:25 pm
Hi John ... If you draw balls as points with the ball radius then they are drawn as circles filled with a single colour, and they don't have the 3D appearence...
3705
Roger Kaufman
vortexswirling
Oct 3, 2009 3:35 pm
Hi Adrian, ... From a coding aspect, I think of it like this. For every triplet of vertices, v1,v2,v3, if length v1,v2 or length v2,v3 are the desired length...
