source/angleselect.h

   1 /* This file is part of Shapes.
   2  *
   3  * Shapes is free software: you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation, either version 3 of the License, or
   6  * any later version.
   7  *
   8  * Shapes is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with Shapes.  If not, see <http://www.gnu.org/licenses/>.
  15  *
  16  * Copyright 2008 Henrik Tidefelt
  17  */
  18
  19 #pragma once
  20
  21 /* angleSelectNorm2 minimizes a linear combination of the quadratic angle differences.
  22  * It does so by first bringing a1 to the interval [ 0, 2pi ], and then bringing the
  23  * second angle to the range a1 + [ -pi, pi ], and then performing the minimization
  24  * without the modulo operation involved.
  25  */
  26 double
  27 angleSelectNorm2( double a1, double a2, double w1, double w2 );