geodesic-sphere

Math for a geodesic sphere

I'm trying to create a very specific geodesic tessellation, but I can't find anything online about it. It is normal to subdivide the triangles of an icosahedron into triangle patches and project them onto the sphere. However, I noticed an animated GIF on the Wikipedia entry for Geodesic Domes that appears not to follow this scheme. Geod...

Math function from php to MySQL

I need to use this function form php directly to mysql i'm currently using a simpler formula but this one works better, the porpose is to find the geodetic distance from two point on a map, so basically in my mysql i have a table with cities and avery city has its own lat,long values... his is the formula i would translate function di...