/* 
 * PlanetPenguin Racer 
 * Copyright (C) 2004-2005 Volker Stroebel <volker@planetpenguin.de>
 * 
 * Copyright (C) 1999-2001 Jasmin F. Patry
 * 
 * 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.
 * 
 * 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 _PHYS_SIM_H_
#define _PHYS_SIM_H_

#include "course_load.h"

#include "player.h"

/// Acceleration due to gravity m/s^2 
#define EARTH_GRAV 9.81

#define M_PER_SEC_TO_KM_PER_H 3.6

#define KM_PER_H_TO_M_PER_SEC ( 1.0 / M_PER_SEC_TO_KM_PER_H )

/// Speed at which paddling ceases to be effective (m/s)
#define MAX_PADDLING_SPEED ( 60.0 * KM_PER_H_TO_M_PER_SEC ) 

/// Time over which constant jump force is applied
#define JUMP_FORCE_DURATION 0.20

void set_wind_velocity(ppogl::Vec3d velocity, float scale);

void increment_turn_fact(Player& plyr, float amt);

float get_min_y_coord();

ppogl::Vec3d find_course_normal(const float x, const float z);

float find_y_coord(float x, float z);

void get_surface_type(float x, float z, float weights[]);

pp::Plane get_local_course_plane(ppogl::Vec3d pt);

float get_compression_depth(const int terrain); 

void set_tux_pos(Player& plyr, ppogl::Vec3d newPos);

void update_player_pos(float timestep);

void init_physical_simulation();

#endif // _PHYS_SIM_H_