geom.h

00001 /** @file geom/geom.h geometry helper functions for manipulating
00002     angles, converting degrees/radians */
00003 
00004 ///////////////////////////////////////////////////////////////////////
00005 //
00006 // Copyright (c) 2002-2004 California Institute of Technology
00007 // Copyright (c) 2004-2007 University of Southern California
00008 // Rob Peters <rjpeters at usc dot edu>
00009 //
00010 // created: Mon May 12 11:16:03 2003
00011 // commit: $Id: geom.h 9078 2007-12-11 21:11:45Z rjpeters $
00012 // $HeadURL: svn://isvn.usc.edu/software/invt/trunk/saliency/src/Image/geom.h $
00013 //
00014 // --------------------------------------------------------------------
00015 //
00016 // This file is part of GroovX.
00017 //   [http://ilab.usc.edu/rjpeters/groovx/]
00018 //
00019 // GroovX is free software; you can redistribute it and/or modify it
00020 // under the terms of the GNU General Public License as published by
00021 // the Free Software Foundation; either version 2 of the License, or
00022 // (at your option) any later version.
00023 //
00024 // GroovX is distributed in the hope that it will be useful, but
00025 // WITHOUT ANY WARRANTY; without even the implied warranty of
00026 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00027 // General Public License for more details.
00028 //
00029 // You should have received a copy of the GNU General Public License
00030 // along with GroovX; if not, write to the Free Software Foundation,
00031 // Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
00032 //
00033 ///////////////////////////////////////////////////////////////////////
00034 
00035 #ifndef GROOVX_GEOM_GEOM_H_UTC20050626084022_DEFINED
00036 #define GROOVX_GEOM_GEOM_H_UTC20050626084022_DEFINED
00037 
00038 #include <cmath>
00039 
00040 namespace geom
00041 {
00042   inline double deg2rad(double degrees)
00043   {
00044     return degrees * M_PI/180.0;
00045   }
00046 
00047   inline double rad2deg(double radians)
00048   {
00049     return radians * 180.0/M_PI;
00050   }
00051 
00052   inline double deg_n180_180(double degrees)
00053   {
00054     while (degrees > 180.0) { degrees -= 360.0; }
00055     while (degrees <= -180.0) { degrees += 360.0; }
00056 
00057     return degrees;
00058   }
00059 
00060   inline double rad_0_2pi(double angle)
00061   {
00062     while (angle < 0.0)     angle += 2*M_PI;
00063     while (angle >= 2*M_PI) angle -= 2*M_PI;
00064 
00065     return angle;
00066   }
00067 
00068   inline double rad_npi_pi(double angle)
00069   {
00070     while (angle < -M_PI) angle += 2*M_PI;
00071     while (angle >= M_PI) angle -= 2*M_PI;
00072 
00073     return angle;
00074   }
00075 
00076   inline double rad_0_pi(double angle)
00077   {
00078     while (angle < 0.0)   angle += M_PI;
00079     while (angle >= M_PI) angle -= M_PI;
00080 
00081     return angle;
00082   }
00083 }
00084 
00085 static const char __attribute__((used)) vcid_groovx_geom_geom_h_utc20050626084022[] = "$Id: geom.h 9078 2007-12-11 21:11:45Z rjpeters $ $HeadURL: svn://isvn.usc.edu/software/invt/trunk/saliency/src/Image/geom.h $";
00086 #endif // !GROOVX_GEOM_GEOM_H_UTC20050626084022_DEFINED