src/tool/euler_vector.cpp

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00001 /******************************************************************************
00002  *  Wormux is a convivial mass murder game.
00003  *  Copyright (C) 2001-2004 Lawrence Azzoug.
00004  *
00005  *  This program is free software; you can redistribute it and/or modify
00006  *  it under the terms of the GNU General Public License as published by
00007  *  the Free Software Foundation; either version 2 of the License, or
00008  *  (at your option) any later version.
00009  *
00010  *  This program is distributed in the hope that it will be useful,
00011  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00012  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00013  *  GNU General Public License for more details.
00014  *
00015  *  You should have received a copy of the GNU General Public License
00016  *  along with this program; if not, write to the Free Software
00017  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
00018  *****************************************************************************/
00019 
00020 #include "euler_vector.h"
00021 
00025 void EulerVector::Clear(){
00026   x0 = 0.0;
00027   x1 = 0.0;
00028   x2 = 0.0;
00029 }
00030 
00034 void EulerVector::ComputeOneEulerStep(double a, double b, double c, double d, double dt){
00035   x2 = (d - b * x1 - c * x0) / a;
00036   x1 = x1 + x2 * dt;
00037   x0 = x0 + x1 * dt;
00038 }
00039 

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