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
21 #ifndef SUPERTUX_PHYSIC_H
22 #define SUPERTUX_PHYSIC_H
24 /** This is a very simplistic physics engine handling accelerated and constant
25 * movement along with gravity.
33 /** resets all velocities and accelerations to 0 */
36 /** sets velocity to a fixed value */
37 void set_velocity(float vx, float vy);
39 /** velocities invertion */
40 void inverse_velocity_x();
41 void inverse_velocity_y();
43 float get_velocity_x();
44 float get_velocity_y();
46 /** sets acceleration applied to the object. (Note that gravity is
47 * eventually added to the vertical acceleration)
49 void set_acceleration(float ax, float ay);
51 float get_acceleration_x();
52 float get_acceleration_y();
54 /** enables or disables handling of gravity */
55 void enable_gravity(bool gravity_enabled);
57 /** applies the physical simulation to given x and y coordinates */
58 void apply(float frame_ratio, float &x, float &y);
61 /// horizontal and vertical acceleration
63 /// horizontal and vertical velocity
65 /// should we respect gravity in out calculations?
69 #endif /*SUPERTUX_PHYSIC_H*/