Hi Adrian, There is another problem in iso_delta. I have looked at it but am not sure how to fix it. It is in case_f_6_or_12_pentagonal_dipyramids when k is 1...
Hi Adrian, ... On a hunch I think I have fixed it. On line 813 instead of mat3d::rot(0, 0, angle+M_PI/10) ); is should be mat3d::rot(0, 0, angle+M_PI/5) ); ...
Hi Roger ... I will add it in. The change is needed because of the changes to the Dh symmetry alignment. I was calculating some zonohedra and noticed that zono...
Hi Adrian, At one time you mentioned you would be able to generate all the uniform compounds. I replied I would like to have a "skilling" program. I have never...
Hi Roger ... I haven't started anything. I am interested in writing a general compound finding/making function and I hoped it would be possible to use this to...
Hi Adrian, ... Having a generalized program would be good because without restriction there are lots of compounds. When we were working with inscribed figures...
Hi Roger ... The way it would work is to take a polyhedron, a symmetry type, a common symmetry type (kernel), and an angle (if needed). The symmetry subgroups...
Hi Adrian, ... Interesting approach. It may make sense to allow you to complete this feature first. It seems to me that many of the UC's would be able to...
Hi Adrian, ... I hadn't yet tried to use poly_kscope to create it but it would done this way. But one has to know the resultant compound has Oh symmetry. I...
Hi Roger ... I have made a list of suggestions as a starting point. Say the program is scaling polyhedron 0 to fit in polyhedron 1 then the calculations and...
Hi Adrian, ... This is very enlightening. It would mean there would need be no intersection logic. Polyhedra 0 would be scaled correctly even if the features...
Hi Roger ... This is related to aligning on subgroups again, which I will add in. For example, if you want to align an icosahedron on a 3-fold axis then you...
Hi Adrian, ... There are 3 D2h sub-symmetry axes. Depending on how we do it, the edge line at the Z-axis is up and down or left and right (assuming one D2h...
Hi Roger ... Yes, you are right. There are two ways to align the icosahedron compared to the six ways of aligning a cuboid. I am not sure offhand how to...
Hi Adrian, ... Since the Snub Dodeca also has this property it is not due to horizontal reflection. It gets complicated. For a 6-fold dihedral hexagonal...
Hi Adrian, ... I thought this might need further explanation. Stella can display symmetry axes and that is why I refer to it. For the hexagonal antiprism, it...
Hi Roger ... For the 2-fold dihedral alignment of the hexagonal antiprism there are some more possibilities. There are two alignments that fix the principal...
... To put a name to it, the group of common symmetries appear to be the normalizer of the symmetry group (that is being aligned with) in the Euclidean group....
... I tracked down the problem. It was due to detected symmetries being aligned with the "standard" symmetry type rather than with the polyhedron. Here is a...
Adrian, Looks like there is a system for positioning then. I am thinking something like off_pos for doing such a thing (instead of using off_trans) and then it...
Hi Adrian, ... I should say, since you are working with the symmetry you should do it any way you want! I was just thinking it might be nice to have something...
Hi Roger ... I would imagine that the more interesting inscribings would come from aligning on larger subsymmetries common to both polyhedra. Given a function...
Hi Roger ... I am planning to have a class that draws the elements suitable for the output format, but also include OFF format output with that. The programs...
Hi Adrian, ... I think you are right about this. If the two polyhedra have some of the same symmetry axes they will be lined up after the inscribing. (I found...
Hi Adrian, ... There was a ring model you generated lately that was slow in any vrml browser. That is odd, but perhaps lots of cylinders takes time. I have...
Hi Roger ... That is an idea. I was going to try a polygon ribbon that was flat in the plane of the circle, and try adding a vertical ribbon to that to have a...
Hi Roger I am looking at the default element sizing in Antiview, etc, at the moment. The defaults I have considered, and the effect on a cube octahedron dual...
... I also meant to say that for a GUI app it seems more natural that if a polyhedron is added it would use the current element size. The idea then is that...
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