I made a mistake in N-icons study which is now corrected. I had stated that Hybrid N-icons were self dual. They are almost but not quite! They always have one...
Hi Adrian, ... It looks that way and that is why I never questioned it. I didn't even pay attention to my own face and vertex counts! Otherwise I would have ...
P.S. The other day I came upon this page of Paul Roberts. http://homepage.ntlworld.com/paul.roberts99/Other_sphericon_links.html Notice he makes mention of...
Hi Roger I haven't forgotten this one! ... I don't have clear criteria for inclusion, but it is mainly that a program feels "complete" or "general". The fact...
Hi Adrian, The other day "plantri" was mentioned somewhere. On that same page is fullgen which is for fullerenes. I've long known about this program and one...
Hi Roger ... Parsing the output looks straightforward. One of the output options (code 7) is practically the same as the face data in an OFF file. ... I...
Hi Adrian, ... Thanks, I didn't think of this because I usually set the color on the last vertex. Of course any index will go in there! Doh. I'm 90 percent...
... Whoa! Its way more general than this! I'm missing lots of cases! This would be way more apparent if we could have one of these in our hands and twist it...
Hi Roger ... I like the -I option. I don't think I tried that before. ... I think the formula for the number of suraces is the greatest common divisor of N and...
Hi Adrian, What are you use for your gcd function? The ones I've pulled off the net all give different answers that this. If this is a property I'd like to...
Hi Roger ... The one curently in Antiprism is long hcf(long m, long n) { if(m == 0) return n; if(n == 0) return m; return hcf(n,m%n); } Which implements the...
Hi Roger ... I think the general formula for the number of surfaces in even, odd and dual n_icons could be (gcd(N, 2T) + axis_edges) / 2 Where axis_edges is...
Hi Adrian, ... Can you show the function you are using for gcd? Doing it this way, the program would have been done quite differently. I have gotten rid of the...
Hi Roger ... I have been doing them by hand. If you use the Antiprism GCD function that I posted (hcf) there is a problem in that it will return a negative...
Hi Adrian, The problem was that I was placing the default N (which = 4) in the formula. Now that I'm place the code in the right place in the program it works....
Hi Roger ... The brackets are different to the formula I gave, which would be long s = (hcf(n, 2*t-t_mod) + axis_edges) / 2; (The bracketted expression is...
Hi Adrian, ... Egad! You have determined that you could sweep these out without twisting anything?! That's amazing. I think if you'd have written this program...
Hi Roger ... My own programs tend to improve incrementally. I rarely start with a solution that I stick with! ... Thomas Banchoff's book Beyond the Third...
Hi Adrian, ... listing/0716750252/ref=dp_olp_1/104-4653475-5104736 I picked up, I think, the very one you saw. It has a dust jacket etc for 78 cents. Shipping...
Hi Roger ... I think I paid $3.00 for mine! I also bought it as "very good". I was very pleased when it arrived as it appeared to be unread and was in perfect...
Hi Adrian, ... was ... Do you have any plans for 4D at some point? ... Well, I thought it was working but not quite. n_icons -H -n 12 | pol_recip | antiview ...
Hi Roger ... No real plans at the moment. There is geometric support for 4D in the Antiprism code. You can specify a set of points in 4D and rotate them,...
Hi Adrian, ... Stella4D has several ways to view 4D. But animation must be performed with a mouse drag. This goes back to something we talked about in the ...
Hi Adrian, I've never done a try/catch before but I have to now. In the vrml parser code there is some kind of error which sets a pointer even though it is bad...
Hi, ... should have been int tmp = color_table->getNColors(); but the idea is the same. The color_table pointer is invalid and it will error out there. Roger...
Hi Roger ... It is difficult to say, but it doesn't sound right. For example, if the pointer returned after the error was some random value then it is possible...
Hi Roger ... I have just added in an "untimed" test version of spinning, which is pretty much working. I will have to add some timing code for the release....
Hi Adrian, ... The problem is there is little example code and I've found hardly anyone uses this on the internet. Everyone must write their own parser or...
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