1 // point2d.cxx -- 2d coordinate routines
3 // Written by Curtis Olson, started September 1998.
5 // Copyright (C) 1998 Curtis L. Olson - curt@me.umn.edu
7 // This program is free software; you can redistribute it and/or modify
8 // it under the terms of the GNU General Public License as published by
9 // the Free Software Foundation; either version 2 of the License, or
10 // (at your option) any later version.
12 // This program is distributed in the hope that it will be useful,
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 // GNU General Public License for more details.
17 // You should have received a copy of the GNU General Public License
18 // along with this program; if not, write to the Free Software
19 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 // (Log is kept at end of this file)
28 #include "point2d.hxx"
31 // convert a point from cartesian to polar coordinates
32 point2d cart_to_polar_2d(point2d in) {
34 result.dist = sqrt( in.x * in.x + in.y * in.y );
35 result.theta = atan2(in.y, in.x);
42 // Revision 1.1 1998/09/04 23:04:53 curt
43 // Beginning of convex hull genereration routine.