Re: Sphere through 4 points
- To: mathgroup at smc.vnet.net
- Subject: [mg85419] Re: Sphere through 4 points
- From: Ray Koopman <koopman at sfu.ca>
- Date: Sun, 10 Feb 2008 05:12:08 -0500 (EST)
- References: <fojrcq$gme$1@smc.vnet.net>
On Feb 9, 1:22 am, Steve Gray <stev... at roadrunner.com> wrote: > Given 4 points in 3-space not lying in a plane, I want the > center and radius of the incident sphere. I know about the elegant > determinant solution (4 or 5 determinants, each 4x4, plus a few > arithmetic operations) and I'm using that, but maybe someone has coded > a faster version. > Thanks for any information. > > Steve Gray See Dan Lichtblau's code at http://forums.wolfram.com/mathgroup/archive/2003/Jan/msg00019.html