4 // Copyright (C) 2004 Tobias Glaesser <tobi.web@gmx.de>
6 // This program is free software; you can redistribute it and/or
7 // modify it under the terms of the GNU General Public License
8 // as published by the Free Software Foundation; either version 2
9 // of the License, or (at your option) any later version.
11 // This program is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
16 // You should have received a copy of the GNU General Public License
17 // along with this program; if not, write to the Free Software
18 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
25 #include "math/physic.h"
27 using namespace SuperTux;
30 : ax(0), ay(0), vx(0), vy(0), gravity_enabled(true)
41 ax = ay = vx = vy = 0;
42 gravity_enabled = true;
46 Physic::set_velocity_x(float nvx)
52 Physic::set_velocity_y(float nvy)
58 Physic::set_velocity(float nvx, float nvy)
64 void Physic::inverse_velocity_x()
69 void Physic::inverse_velocity_y()
75 Physic::get_velocity_x()
81 Physic::get_velocity_y()
87 Physic::set_acceleration_x(float nax)
93 Physic::set_acceleration_y(float nay)
99 Physic::set_acceleration(float nax, float nay)
106 Physic::get_acceleration_x()
112 Physic::get_acceleration_y()
118 Physic::enable_gravity(bool enable_gravity)
120 gravity_enabled = enable_gravity;
124 Physic::get_movement(float elapsed_time)
126 float grav = gravity_enabled ? 1000 : 0;
129 vx * elapsed_time + ax * elapsed_time * elapsed_time,
130 vy * elapsed_time + (ay + grav) * elapsed_time * elapsed_time
132 vx += ax * elapsed_time;
133 vy += (ay + grav) * elapsed_time;