X-Git-Url: https://git.verplant.org/?a=blobdiff_plain;f=src%2Fphysic.h;h=86114eb8cc8bdc235a18e03b9a84e88bbab69554;hb=fc5dc4864949fc6945153bf2f172cb9c6a02e843;hp=860802161ba5b03fcd678314b575088ca9b624c5;hpb=a2715d2de23913e3bd458cbea162924e2f379495;p=supertux.git

diff --git a/src/physic.h b/src/physic.h
index 860802161..86114eb8c 100644
--- a/src/physic.h
+++ b/src/physic.h
@@ -1,60 +1,77 @@
+//  $Id$
+// 
+//  SuperTux
+//  Copyright (C) 2004 Tobias Glaesser <tobi.web@gmx.de>
 //
-// C++ Interface: physic
+//  This program is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU General Public License
+//  as published by the Free Software Foundation; either version 2
+//  of the License, or (at your option) any later version.
 //
-// Description: 
-//
-//
-// Author: Tobias Glaesser <tobi.web@gmx.de>, (C) 2004
-//
-// Copyright: See COPYING file that comes with this distribution
-//
-//
-
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+// 
+//  You should have received a copy of the GNU General Public License
+//  along with this program; if not, write to the Free Software
+//  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+//  02111-1307, USA.
 #ifndef SUPERTUX_PHYSIC_H
 #define SUPERTUX_PHYSIC_H
 
+#include "math/vector.h"
+
+/// Physics engine.
 /** This is a very simplistic physics engine handling accelerated and constant
   * movement along with gravity.
   */
 class Physic
 {
 public:
-    Physic();
-    ~Physic();
+  Physic();
+  ~Physic();
+
+  /// Resets all velocities and accelerations to 0.
+  void reset();
+
+  /// Sets velocity to a fixed value.
+  void set_velocity(float vx, float vy);
 
-    /** resets all velocities and accelerations to 0 */
-    void reset();
+  void set_velocity_x(float vx);
+  void set_velocity_y(float vy);
 
-    /** sets velocity to a fixed value */
-    void set_velocity(float vx, float vy);
+  /// Velocities invertion.
+  void inverse_velocity_x();
+  void inverse_velocity_y();
 
-    float get_velocity_x();
-    float get_velocity_y();
-    
-    /** sets acceleration applied to the object. (Note that gravity is
-     * eventually added to the vertical acceleration)
-     */
-    void set_acceleration(float ax, float ay);
+  float get_velocity_x();
+  float get_velocity_y();
 
-    float get_acceleration_x();
-    float get_acceleration_y();
+  /// Set acceleration.
+  /** Sets acceleration applied to the object. (Note that gravity is
+   * eventually added to the vertical acceleration)
+   */
+  void set_acceleration(float ax, float ay);
 
-    /** enables or disables handling of gravity */
-    void enable_gravity(bool gravity_enabled);
+  void set_acceleration_x(float ax);
+  void set_acceleration_y(float ay);
 
-    /** applies the physical simulation to given x and y coordinates */
-    void apply(float &x, float &y); 
+  float get_acceleration_x();
+  float get_acceleration_y();
+
+  /// Enables or disables handling of gravity.
+  void enable_gravity(bool gravity_enabled);
+
+  Vector get_movement(float elapsed_time);
 
 private:
-    /// horizontal and vertical acceleration
-    float ax, ay;
-    /// horizontal and vertical velocity
-    float vx, vy;
-    /// should we respect gravity in out calculations?
-    bool gravity_enabled;
+  /// horizontal and vertical acceleration
+  float ax, ay;
+  /// horizontal and vertical velocity
+  float vx, vy;
+  /// should we respect gravity in out calculations?
+  bool gravity_enabled;
 };
 
-/* global variables. */
-extern float gravity;
-
-#endif /*SUPERTUX_PHYSIC_H*/
+#endif