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git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@5240 178a84e3-b1eb-0310-8ba1-8eac791a3b58
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// $Id$
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//
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// SuperTuxKart - a fun racing game with go-kart
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// Copyright (C) 2010 Joerg Henrichs
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 3
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// of the License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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#include "karts/explosion_animation.hpp"
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#include "karts/kart.hpp"
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#include "modes/world.hpp"
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#include "tracks/track.hpp"
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#include "utils/constants.hpp"
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/** The constructor stores a pointer to the kart this object is animating,
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* and initialised the timer.
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* \param kart Pointer to the kart which is animated.
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*/
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ExplosionAnimation::ExplosionAnimation(Kart *kart)
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{
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m_timer = -1;
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m_kart = kart;
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}; // ExplosionAnimation
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// ----------------------------------------------------------------------------
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/** Starts an explosion animation.
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* \param pos The coordinates of the explosion.
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* \param direct_hig True if the kart was hit directly --> maximal impact.
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*/
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void ExplosionAnimation::handleExplosion(const Vec3 &pos, bool direct_hit)
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{
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// Avoid doing another explosion while a kart is thrown around in the air.
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if(m_timer>=0) return;
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m_timer = 0;
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m_xyz = m_kart->getXYZ();
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float t = m_kart->getKartProperties()->getExplosionTime();
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// Half of the overall time is spent in raising, so only use
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// half of the explosion time here.
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// Velocity after t seconds is:
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// v(t) = m_up_velocity + t*gravity
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// Since v(explosion_time*0.5) = 0, the following forumla computes
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// the right initial velocity for a kart to land back after
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// the specified time.
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m_up_velocity = 0.5f * t * World::getWorld()->getTrack()->getGravity();
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World::getWorld()->getPhysics()->removeKart(m_kart);
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m_curr_rotation.setHPR(m_kart->getRotation());
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const int max_rotation = direct_hit ? 2 : 1;
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// To get rotations in botb directions for each axis we determine a random
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// number between -(max_rotation-1) and +(max_rotation-1)
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float f=2.0f*M_PI/t;
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m_add_rotation.setHeading( (rand()%(2*max_rotation+1)-max_rotation)*f );
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m_add_rotation.setPitch( (rand()%(2*max_rotation+1)-max_rotation)*f );
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m_add_rotation.setRoll( (rand()%(2*max_rotation+1)-max_rotation)*f );
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} // handleExplosion
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// ----------------------------------------------------------------------------
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/** Updates the explosion animation.
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* \param dt Time step size.
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* \return True if the explosion is still shown, false if it has finished.
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*/
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bool ExplosionAnimation::update(float dt)
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{
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assert(m_timer>=0);
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m_timer += dt;
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if(m_timer>m_kart->getKartProperties()->getExplosionTime())
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{
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m_timer=-1;
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World::getWorld()->getPhysics()->addKart(m_kart);
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m_kart->getBody()->setLinearVelocity(btVector3(0,0,0));
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m_kart->getBody()->setAngularVelocity(btVector3(0,0,0));
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return false;
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}
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m_up_velocity -= dt*World::getWorld()->getTrack()->getGravity();
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m_xyz.setY(m_xyz.getY()+m_up_velocity*dt);
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m_kart->setXYZ(m_xyz);
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m_curr_rotation += dt*m_add_rotation;
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btQuaternion q(m_curr_rotation.getHeading(), m_curr_rotation.getPitch(),
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m_curr_rotation.getRoll());
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m_kart->setRotation(q);
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return true;
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} // update
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@ -1,70 +0,0 @@
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// $Id$
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//
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// SuperTuxKart - a fun racing game with go-kart
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// Copyright (C) 2010 Joerg Henrichs
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 3
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// of the License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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#ifndef HEADER_EXPLOSION_ANIMATION_HPP
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#define HEADER_EXPLOSION_ANIMATION_HPP
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#include "utils/vec3.hpp"
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class Kart;
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/** This class is a 'mixin' for kart, and handles the animated explosion.
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* I.e. it will throw the kart a certain amount in the air, rotate it
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* randomly, and after the specified time period let it land at the
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* same spot where it was hit, therefore avoiding any problems of
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* karts being pushed on wrong parts of the track, and making explosion
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* more 'fair' (it can't happen that one explosion give you actually
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* a benefit by pushing you forwards.
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* The object is a base class for kart, but will only be used if an
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* explosion happens.
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*/
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class ExplosionAnimation
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{
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private:
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/** The coordinates where the kart was hit originally. */
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Vec3 m_xyz;
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/** The kart's current rotation. */
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Vec3 m_curr_rotation;
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/** The artificial rotation to toss the kart around. It's in units
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* of rotation per second. */
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Vec3 m_add_rotation;
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/** The upwards velocity. */
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float m_up_velocity;
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/** Timer for the explosion. */
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float m_timer;
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/** Duration for this explosion. This can potentially be set
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* with different values for different karts, or depending
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* on difficulty (so that on easy you can drive again earlier. */
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float m_duration;
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/** A pointer to the class to which this object belongs. */
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Kart *m_kart;
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public:
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ExplosionAnimation(Kart *kart);
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~ExplosionAnimation() {};
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void handleExplosion(const Vec3& pos, bool direct_hit);
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bool update(float dt);
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}; // ExplosionAnimation
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#endif
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