skidding.hpp

//
//  SuperTuxKart - a fun racing game with go-kart
//  Copyright (C) 2012-2015  Joerg Henrichs
//
//  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 3
//  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 HEADER_SKIDDING_HPP
#define HEADER_SKIDDING_HPP
 
#include "karts/controller/kart_control.hpp"
#include "utils/leak_check.hpp"
#include "utils/no_copy.hpp"
#include "utils/types.hpp"
 
class BareNetworkString;
class Kart;
class ShowCurve;
 
#include <vector>
 
#undef SKID_DEBUG
 
class Skidding
{
friend class KartRewinder;
public:
    LEAK_CHECK();
private:
    float m_skid_reduce_turn_delta;
 
    float m_real_steering;
 
    float m_visual_rotation;
 
    float m_skid_factor;
 
    uint16_t m_skid_time;
 
    bool m_skid_bonus_ready;
 
    float m_remaining_jump_time;
 
    float m_graphical_remaining_jump_time;
 
    float m_prev_visual_rotation;
 
    float m_smoothing_time;
 
    float m_smoothing_dt;
 
    int m_skid_bonus_end_ticks;
 
public:
    enum SkidState { SKID_NONE, SKID_ACCUMULATE_LEFT, SKID_ACCUMULATE_RIGHT,
                     SKID_SHOW_GFX_LEFT, SKID_SHOW_GFX_RIGHT, SKID_BREAK} ;
 
private:
    SkidState m_skid_state;
 
    Kart *m_kart;
 
#ifdef SKID_DEBUG
    ShowCurve *m_predicted_curve;
    ShowCurve *m_actual_curve;
#endif
 
    unsigned int getSkidBonus(float *bonus_time, float *bonus_speed,
                              float *bonus_force) const;
    float updateSteering(float steer, int ticks);
public:
         Skidding(Kart *kart);
        ~Skidding();
    void reset();
    float updateGraphics(float dt);
    void update(int dt, bool is_on_ground, float steer,
                KartControl::SkidControl skidding);
    void saveState(BareNetworkString *buffer);
    void rewindTo(BareNetworkString *buffer);
    // ------------------------------------------------------------------------
    float getVisualSkidRotation() const
    {
        if (m_smoothing_dt >= 0.0f)
        {
            return m_smoothing_dt * m_visual_rotation +
                (1.0f - m_smoothing_dt) * m_prev_visual_rotation;
        }
        return m_visual_rotation;
    }
    // ------------------------------------------------------------------------
    float getSkidFactor() const { return m_skid_factor; }
    // ------------------------------------------------------------------------
    bool isSkidding() const { return m_skid_factor>1.0f; }
    // ------------------------------------------------------------------------
    float getSteeringFraction() { return m_real_steering; }
    // ------------------------------------------------------------------------
    SkidState getSkidState() const { return m_skid_state; }
    // ------------------------------------------------------------------------
    float getSteeringWhenSkidding(float steering) const;
    // ------------------------------------------------------------------------
    bool getSkidBonusReady() const { return m_skid_bonus_ready; }
    // ------------------------------------------------------------------------
    bool isJumping() const { return m_graphical_remaining_jump_time > 0;  }
    // ------------------------------------------------------------------------
    void prepareSmoothing();
    // ------------------------------------------------------------------------
    void checkSmoothing();
 
};   // Skidding
 
 
#endif
 
/* EOF */