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extremetuxracer  0.5beta
vec2d.cpp
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00001 /* 
00002  * PPGLTK
00003  *
00004  * Copyright (C) 2004-2005 Volker Stroebel <volker@planetpenguin.de>
00005  * 
00006  * This program is free software; you can redistribute it and/or
00007  * modify it under the terms of the GNU General Public License
00008  * as published by the Free Software Foundation; either version 2
00009  * of the License, or (at your option) any later version.
00010  * 
00011  * This program is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014  * GNU General Public License for more details.
00015  * 
00016  * You should have received a copy of the GNU General Public License
00017  * along with this program; if not, write to the Free Software
00018  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
00019  */
00020 
00021 #include "vec2d.h"
00022 
00023 #include <math.h>
00024 
00025 namespace pp {
00026 
00027 Vec2d::Vec2d()
00028  : x(0.0), y(0.0)
00029 {
00030 }
00031        
00032 Vec2d::Vec2d(const double x, const double y)
00033  : x(x), y(y)
00034 {
00035 }
00036 
00037 Vec2d::Vec2d(const double *v)
00038  : x(v[0]), y(v[1])
00039 {
00040 }
00041 
00042 Vec2d
00043 operator+(const Vec2d& vec1,const Vec2d& vec2)
00044 {
00045        return Vec2d(vec1.x+vec2.x,vec1.y+vec2.y);
00046 }
00047 
00048 Vec2d
00049 operator-(const Vec2d& vec1,const Vec2d& vec2)
00050 {
00051        return Vec2d(vec1.x-vec2.x,vec1.y-vec2.y);
00052 }
00053 
00054 } //namespace pp