4 // Copyright (C) 2004 Tobias Glaesser <tobi.web@gmx.de>
5 // Copyright (C) 2006 Matthias Braun <matze@braunis.de>
7 // This program is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU General Public License
9 // as published by the Free Software Foundation; either version 2
10 // of the License, or (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., 59 Temple Place - Suite 330, Boston, MA
26 : ax(0), ay(0), vx(0), vy(0), gravity_enabled(true), gravity(1000)
31 Physic::get_movement(float elapsed_time)
33 float grav = gravity_enabled ? gravity : 0;
36 vx * elapsed_time + ax * elapsed_time * elapsed_time,
37 vy * elapsed_time + (ay + grav) * elapsed_time * elapsed_time
39 vx += ax * elapsed_time;
40 vy += (ay + grav) * elapsed_time;