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-/*
- * The ManaPlus Client
- * Copyright (C) 2006-2009 The Mana World Development Team
- * Copyright (C) 2009-2010 The Mana Developers
- * Copyright (C) 2011-2013 The ManaPlus Developers
- *
- * This file is part of The ManaPlus Client.
- *
- * 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
- * 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, see <http://www.gnu.org/licenses/>.
- */
-
-#ifndef PARTICLE_H
-#define PARTICLE_H
-
-#include "actor.h"
-#include "localconsts.h"
-
-#include <list>
-#include <string>
-
-class Map;
-class Particle;
-class ParticleEmitter;
-class SDLFont;
-
-namespace gcn
-{
- class Color;
- class Font;
-}
-
-typedef std::list<Particle *> Particles;
-typedef Particles::iterator ParticleIterator;
-typedef Particles::const_iterator ParticleConstIterator;
-typedef std::list<ParticleEmitter *> Emitters;
-typedef Emitters::iterator EmitterIterator;
-typedef Emitters::const_iterator EmitterConstIterator;
-
-/**
- * A particle spawned by a ParticleEmitter.
- */
-class Particle : public Actor
-{
- public:
- enum AliveStatus
- {
- ALIVE = 0,
- DEAD_TIMEOUT = 1,
- DEAD_FLOOR = 2,
- DEAD_SKY = 4,
- DEAD_IMPACT = 8,
- DEAD_OTHER = 16,
- DEAD_LONG_AGO = 128
- };
- static const float PARTICLE_SKY; // Maximum Z position of particles
- static int fastPhysics; // Mode of squareroot calculation
- static int particleCount; // Current number of particles
- static int maxCount; // Maximum number of particles
- static int emitterSkip; // Duration of pause between two
- // emitter updates in ticks
- static bool enabled; // true when non-crucial particle effects
- // are disabled
-
- /**
- * Constructor.
- *
- * @param map the map this particle will add itself to, may be nullptr
- */
- explicit Particle(Map *const map);
-
- A_DELETE_COPY(Particle)
-
- /**
- * Destructor.
- */
- ~Particle();
-
- /**
- * Deletes all child particles and emitters.
- */
- void clear();
-
- /**
- * Gives a particle the properties of an engine root particle and loads
- * the particle-related config settings.
- */
- void setupEngine();
-
- /**
- * Updates particle position, returns false when the particle should
- * be deleted.
- */
- virtual bool update();
-
- /**
- * Draws the particle image.
- */
- virtual bool draw(Graphics *const graphics,
- const int offsetX, const int offsetY) const override;
-
- /**
- * Necessary for sorting with the other sprites.
- */
- virtual int getPixelY() const override A_WARN_UNUSED
- { return static_cast<int>(mPos.y) - 16; }
-
- /**
- * Necessary for sorting with the other sprites for sorting only.
- */
- virtual int getSortPixelY() const override A_WARN_UNUSED
- { return static_cast<int>(mPos.y) - 16; }
-
- /**
- * Creates a blank particle as a child of the current particle
- * Useful for creating target particles
- */
- Particle *createChild();
-
- /**
- * Creates a child particle that hosts some emitters described in the
- * particleEffectFile.
- */
- Particle *addEffect(const std::string &particleEffectFile,
- const int pixelX, const int pixelY,
- const int rotation = 0);
-
- /**
- * Creates a standalone text particle.
- */
- Particle *addTextSplashEffect(const std::string &text,
- const int x, const int y,
- const gcn::Color *const color,
- gcn::Font *const font,
- const bool outline = false);
-
- /**
- * Creates a standalone text particle.
- */
- Particle *addTextRiseFadeOutEffect(const std::string &text,
- const int x, const int y,
- const gcn::Color *const color,
- gcn::Font *const font,
- const bool outline = false);
-
- /**
- * Adds an emitter to the particle.
- */
- void addEmitter(ParticleEmitter *const emitter)
- { mChildEmitters.push_back(emitter); }
-
- /**
- * Sets the position in 3 dimensional space in pixels relative to map.
- */
- void moveTo(const Vector &pos)
- { moveBy(pos - mPos); }
-
- /**
- * Sets the position in 2 dimensional space in pixels relative to map.
- */
- void moveTo(const float x, const float y);
-
- /**
- * Changes the particle position relative
- */
- void moveBy(const Vector &change);
-
- /**
- * Sets the time in game ticks until the particle is destroyed.
- */
- void setLifetime(const int lifetime)
- { mLifetimeLeft = lifetime; mLifetimePast = 0; }
-
- /**
- * Sets the age of the pixel in game ticks where the particle has
- * faded in completely.
- */
- void setFadeOut(const int fadeOut)
- { mFadeOut = fadeOut; }
-
- /**
- * Sets the remaining particle lifetime where the particle starts to
- * fade out.
- */
- void setFadeIn(const int fadeIn)
- { mFadeIn = fadeIn; }
-
- /**
- * Sets the current velocity in 3 dimensional space.
- */
- void setVelocity(const float x, const float y, const float z)
- { mVelocity.x = x; mVelocity.y = y; mVelocity.z = z; }
-
- /**
- * Sets the downward acceleration.
- */
- void setGravity(const float gravity)
- { mGravity = gravity; }
-
- /**
- * Sets the ammount of random vector changes
- */
- void setRandomness(const int r)
- { mRandomness = r; }
-
- /**
- * Sets the ammount of velocity particles retain after
- * hitting the ground.
- */
- void setBounce(const float bouncieness)
- { mBounce = bouncieness; }
-
- /**
- * Sets the flag if the particle is supposed to be moved by its parent
- */
- void setFollow(const bool follow)
- { mFollow = follow; }
-
- /**
- * Gets the flag if the particle is supposed to be moved by its parent
- */
- bool doesFollow() const A_WARN_UNUSED
- { return mFollow; }
-
- /**
- * Makes the particle move toward another particle with a
- * given acceleration and momentum
- */
- void setDestination(Particle *const target,
- const float accel, const float moment)
- { mTarget = target; mAcceleration = accel; mMomentum = moment; }
-
- /**
- * Sets the distance in pixel the particle can come near the target
- * particle before it is destroyed. Does only make sense after a target
- * particle has been set using setDestination.
- */
- void setDieDistance(const float dist)
- { mInvDieDistance = 1.0f / dist; }
-
- /**
- * Changes the size of the emitters so that the effect fills a
- * rectangle of this size
- */
- void adjustEmitterSize(const int w, const int h);
-
- void setAllowSizeAdjust(const bool adjust)
- { mAllowSizeAdjust = adjust; }
-
- bool isAlive() const A_WARN_UNUSED
- { return mAlive == ALIVE; }
-
- /**
- * Determines whether the particle and its children are all dead
- */
- bool isExtinct() const A_WARN_UNUSED
- { return !isAlive() && mChildParticles.empty(); }
-
- /**
- * Manually marks the particle for deletion.
- */
- void kill()
- { mAlive = DEAD_OTHER; mAutoDelete = true; }
-
- /**
- * After calling this function the particle will only request
- * deletion when kill() is called
- */
- void disableAutoDelete()
- { mAutoDelete = false; }
-
- /** We consider particles (at least for now) to be one layer-sprites */
- virtual int getNumberOfLayers() const
- { return 1; }
-
- virtual float getAlpha() const
- { return 1.0f; }
-
- virtual void setAlpha(const float alpha A_UNUSED) override
- { }
-
- virtual void setDeathEffect(const std::string &effectFile,
- const signed char conditions)
- { mDeathEffect = effectFile; mDeathEffectConditions = conditions; }
-
- protected:
- // Opacity of the graphical representation of the particle
- float mAlpha;
-
- // Lifetime left in game ticks
- int mLifetimeLeft;
-
- // Age of the particle in game ticks
- int mLifetimePast;
-
- // Lifetime in game ticks left where fading out begins
- int mFadeOut;
-
- // Age in game ticks where fading in is finished
- int mFadeIn;
-
- // Speed in pixels per game-tick.
- Vector mVelocity;
-
- // Is the particle supposed to be drawn and updated?
- AliveStatus mAlive;
- private:
- // List of child emitters.
- Emitters mChildEmitters;
-
- // List of particles controlled by this particle
- Particles mChildParticles;
-
- // Particle effect file to be spawned when the particle dies
- std::string mDeathEffect;
-
- // dynamic particle
- // Downward acceleration in pixels per game-tick.
- float mGravity;
-
- // How much the particle bounces off when hitting the ground
- float mBounce;
-
- // Acceleration towards the target particle in pixels per game-tick
- float mAcceleration;
-
- // Distance in pixels from the target particle that causes
- // the destruction of the particle
- float mInvDieDistance;
-
- // How much speed the particle retains after each game tick
- float mMomentum;
-
- // The particle that attracts this particle
- Particle *mTarget;
-
- // Ammount of random vector change
- int mRandomness;
-
- // Bitfield of death conditions which trigger spawning
- // of the death particle
- signed char mDeathEffectConditions;
-
- // May the particle request its deletion by the parent particle?
- bool mAutoDelete;
-
- // Can the effect size be adjusted by the object props in the map file?
- bool mAllowSizeAdjust;
-
- // is this particle moved when its parent particle moves?
- bool mFollow;
-};
-
-extern Particle *particleEngine;
-
-#endif // PARTICLE_H
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