On 2016-09-14 20:12, James Buddenhagen wrote:
Thanks to Allan and Bill. I see what it is now.
The .off format is described here http://www.antiprism.com/ where also you can find nice software for viewing and manipulating polyhedra in the .off format.
I gather it uses floating point approximations. Some of Mathematica's polyhedra are similarly blighted, but their nets aren't! I'm looking for software to fold up a net with symbolic coordinates. Failing that, very high precision, sufficient to reconstruct the algebrsic numbers. --rwg
BTW, I have maple but not mathematica.
On Wed, Sep 14, 2016 at 1:32 PM, Allan Wechsler <acwacw@gmail.com> wrote:
It is a square antiprism, with triangular prisms stuck to both its square faces.
On Wed, Sep 14, 2016 at 1:45 PM, James Buddenhagen <jbuddenh@gmail.com> wrote:
Haha -- that is an endearing name :) . Do you happen to have an off file for that? I'm still trying to figure out what it is!
On Wed, Sep 14, 2016 at 4:10 AM, Bill Gosper <billgosper@gmail.com> wrote:
is nonconvex, but the name is irresistible. gosper.org/gyroelongatedbifastigium.png Resistince is futile. --rwg