Files
stk-code_catmod/src/items/plunger.cpp
2022-11-17 08:21:58 +08:00

310 lines
10 KiB
C++

//
// SuperTuxKart - a fun racing game with go-kart
// Copyright (C) 2007-2015 Joerg Henrichs
//
// Physics improvements and linear intersection algorithm by
// Copyright (C) 2009-2015 David Mikos.
//
// 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.
#include "items/plunger.hpp"
#include "audio/sfx_manager.hpp"
#include "io/xml_node.hpp"
#include "items/rubber_band.hpp"
#include "items/projectile_manager.hpp"
#include "graphics/central_settings.hpp"
#include "karts/abstract_kart.hpp"
#include "karts/controller/controller.hpp"
#include "karts/kart_properties.hpp"
#include "network/network_string.hpp"
#include "physics/physical_object.hpp"
#include "physics/physics.hpp"
#include "tracks/track.hpp"
#include "utils/constants.hpp"
#include "utils/string_utils.hpp"
#include <ISceneNode.h>
// -----------------------------------------------------------------------------
Plunger::Plunger(AbstractKart *kart)
: Flyable(kart, PowerupManager::POWERUP_PLUNGER)
{
m_has_locally_played_sound = false;
m_moved_to_infinity = false;
m_reverse_mode = false;
m_rubber_band = NULL;
} // Plunger
// ----------------------------------------------------------------------------
Plunger::~Plunger()
{
if(m_rubber_band)
delete m_rubber_band;
} // ~Plunger
// ----------------------------------------------------------------------------
void Plunger::onFireFlyable()
{
Flyable::onFireFlyable();
m_has_locally_played_sound = false;
m_moved_to_infinity = false;
const float gravity = 0.0f;
setDoTerrainInfo(false);
float forward_offset = 0.5f*m_owner->getKartLength()+0.5f*m_extend.getZ();
float up_velocity = 0.0f;
float plunger_speed = 2 * m_speed;
// if the kart is looking backwards, release from the back
m_reverse_mode = m_owner->getControls().getLookBack();
// find closest kart in front of the current one
const AbstractKart *closest_kart=0;
Vec3 direction;
float kart_dist_2;
getClosestKart(&closest_kart, &kart_dist_2, &direction,
m_owner /* search in front of this kart */, m_reverse_mode);
btTransform kart_transform = m_owner->getAlignedTransform();
float heading =m_owner->getHeading();
float pitch = m_owner->getTerrainPitch(heading);
// aim at this kart if it's not too far
if(closest_kart != NULL && kart_dist_2 < 30*30)
{
float fire_angle = 0.0f;
getLinearKartItemIntersection (m_owner->getXYZ(), closest_kart,
plunger_speed, gravity, forward_offset,
&fire_angle, &up_velocity);
btTransform trans = m_owner->getTrans();
btQuaternion q;
q = trans.getRotation()*(btQuaternion(btVector3(0, 1, 0), fire_angle));
trans.setRotation(q);
m_initial_velocity = btVector3(0.0f, up_velocity, plunger_speed);
createPhysics(forward_offset, m_initial_velocity,
new btCylinderShape(0.5f*m_extend),
0.5f /* restitution */ , btVector3(.0f,gravity,.0f),
/* rotates */false , /*turn around*/false, &trans);
}
else
{
createPhysics(forward_offset, btVector3(pitch, 0.0f, plunger_speed),
new btCylinderShape(0.5f*m_extend),
0.5f /* restitution */, btVector3(.0f,gravity,.0f),
false /* rotates */, m_reverse_mode, &kart_transform);
}
//adjust height according to terrain
setAdjustUpVelocity(false);
const bool create_rubber_band =
!(m_reverse_mode || RaceManager::get()->isBattleMode());
if (create_rubber_band && !m_rubber_band)
m_rubber_band = new RubberBand(this, m_owner);
else if (!create_rubber_band && m_rubber_band)
{
delete m_rubber_band;
m_rubber_band = NULL;
}
if (m_rubber_band)
m_rubber_band->reset();
m_keep_alive = -1;
m_moved_to_infinity = false;
} // onFireFlyable
// ----------------------------------------------------------------------------
void Plunger::init(const XMLNode &node, scene::IMesh *plunger_model)
{
Flyable::init(node, plunger_model, PowerupManager::POWERUP_PLUNGER);
} // init
// ----------------------------------------------------------------------------
void Plunger::updateGraphics(float dt)
{
Flyable::updateGraphics(dt);
#ifndef SERVER_ONLY
scene::ISceneNode *node = getNode();
if (node && m_moved_to_infinity)
node->setVisible(false);
else if (node && !m_moved_to_infinity)
node->setVisible(true);
#endif
if (m_rubber_band)
m_rubber_band->updateGraphics(dt);
} // updateGraphics
// ----------------------------------------------------------------------------
/** Updates the plunger in each frame. If this function returns true, the
* object will be removed by the projectile manager.
* \param dt Time step size.
* \returns True of this object should be removed.
*/
bool Plunger::updateAndDelete(int ticks)
{
// In keep-alive mode, just update the rubber band
if(m_keep_alive >= 0)
{
m_keep_alive -= ticks;
if(m_keep_alive<=0)
{
setHasHit();
return true;
}
if(m_rubber_band != NULL) m_rubber_band->update(ticks);
return false;
}
// Else: update the flyable and rubber band
bool ret = Flyable::updateAndDelete(ticks);
if(m_rubber_band != NULL) m_rubber_band->update(ticks);
return ret;
} // updateAndDelete
// -----------------------------------------------------------------------------
/** Virtual function called when the plunger hits something.
* The plunger is special in that it is not deleted when hitting an object.
* Instead it stays around (though not as a graphical or physical object)
* till the rubber band expires.
* \param kart Pointer to the kart hit (NULL if not a kart).
* \param obj Pointer to PhysicalObject object if hit (NULL otherwise).
* \returns True if there was actually a hit (i.e. not owner, and target is
* not immune), false otherwise.
*/
bool Plunger::hit(AbstractKart *kart, PhysicalObject *obj)
{
if (isOwnerImmunity(kart) || m_moved_to_infinity || !m_has_server_state)
return false;
// pulling back makes no sense in battle mode, since this mode is not a race.
// so in battle mode, always hide view
if( m_reverse_mode || RaceManager::get()->isBattleMode() )
{
if(kart)
{
kart->blockViewWithPlunger();
if (kart->getController()->isLocalPlayerController() &&
!m_has_locally_played_sound)
{
m_has_locally_played_sound = true;
SFXManager::get()->quickSound("plunger");
}
}
m_keep_alive = 0;
// Previously removeBody will break rewind
moveToInfinity(false/*set_moveable_trans*/);
m_moved_to_infinity = true;
}
else
{
m_keep_alive = (int16_t)stk_config->time2Ticks(m_owner->getKartProperties()
->getPlungerBandDuration());
if(kart)
{
m_rubber_band->hit(kart);
}
else if(obj)
{
Vec3 pos(obj->getBody()->getWorldTransform().getOrigin());
m_rubber_band->hit(NULL, &pos);
}
else
{
m_rubber_band->hit(NULL, &(getXYZ()));
}
// Previously removeBody will break rewind
moveToInfinity(false/*set_moveable_trans*/);
m_moved_to_infinity = true;
}
// Rubber band attached.
return false;
} // hit
// -----------------------------------------------------------------------------
/** Called when the plunger hits the track. In this case, notify the rubber
* band, and remove the plunger (but keep it alive).
*/
void Plunger::hitTrack()
{
if (m_moved_to_infinity || !m_has_server_state)
return;
hit(NULL, NULL);
} // hitTrack
// ----------------------------------------------------------------------------
BareNetworkString* Plunger::saveState(std::vector<std::string>* ru)
{
BareNetworkString* buffer = Flyable::saveState(ru);
if (!buffer)
return NULL;
buffer->addUInt16(m_keep_alive);
if (m_rubber_band)
buffer->addUInt8(m_rubber_band->get8BitState());
else
buffer->addUInt8(255);
return buffer;
} // saveState
// ----------------------------------------------------------------------------
void Plunger::restoreState(BareNetworkString *buffer, int count)
{
Flyable::restoreState(buffer, count);
m_keep_alive = buffer->getUInt16();
// Restore position base on m_keep_alive in Plunger::hit
if (m_keep_alive == -1)
m_moved_to_infinity = false;
else
{
moveToInfinity(false/*set_moveable_trans*/);
m_moved_to_infinity = true;
}
uint8_t bit_state = buffer->getUInt8();
if (bit_state == 255 && m_rubber_band)
{
delete m_rubber_band;
m_rubber_band = NULL;
if (!m_reverse_mode)
m_reverse_mode = true;
}
else if (bit_state != 255 && !m_rubber_band)
{
m_rubber_band = new RubberBand(this, m_owner);
if (m_reverse_mode)
m_reverse_mode = false;
}
if (bit_state != 255)
m_rubber_band->set8BitState(bit_state);
} // restoreState
// ----------------------------------------------------------------------------
void Plunger::onDeleteFlyable()
{
Flyable::onDeleteFlyable();
if (m_rubber_band)
m_rubber_band->remove();
} // onDeleteFlyable