package com.badlogic.gdx.graphics.g3d.particles.emitters;
import com.badlogic.gdx.graphics.g3d.particles.ParallelArray.FloatChannel;
import com.badlogic.gdx.graphics.g3d.particles.ParticleChannels;
import com.badlogic.gdx.graphics.g3d.particles.ParticleControllerComponent;
import com.badlogic.gdx.graphics.g3d.particles.values.RangedNumericValue;
import com.badlogic.gdx.graphics.g3d.particles.values.ScaledNumericValue;
import com.badlogic.gdx.utils.Json;
import com.badlogic.gdx.utils.JsonValue;
/** It's a generic use {@link Emitter} which fits most of the particles simulation scenarios.
* @author Inferno */
public class RegularEmitter extends Emitter implements Json.Serializable {
/** Possible emission modes. Emission mode does not affect already emitted particles. */
public enum EmissionMode {
/** New particles can be emitted. */
Enabled,
/** Only valid for continuous emitters.
* It will only emit particles until the end of the effect duration.
* After that emission cycle will not be restarted.*/
EnabledUntilCycleEnd,
/** Prevents new particle emission.*/
Disabled
}
public RangedNumericValue delayValue, durationValue;
public ScaledNumericValue lifeOffsetValue,
lifeValue,
emissionValue;
protected int emission, emissionDiff, emissionDelta;
protected int lifeOffset, lifeOffsetDiff;
protected int life, lifeDiff;
protected float duration, delay, durationTimer, delayTimer;
private boolean continuous;
private EmissionMode emissionMode;
private FloatChannel lifeChannel;
public RegularEmitter(){
delayValue = new RangedNumericValue();
durationValue = new RangedNumericValue();
lifeOffsetValue = new ScaledNumericValue();
lifeValue = new ScaledNumericValue();
emissionValue = new ScaledNumericValue();
durationValue.setActive(true);
emissionValue.setActive(true);
lifeValue.setActive(true);
continuous = true;
emissionMode = EmissionMode.Enabled;
}
public RegularEmitter (RegularEmitter regularEmitter) {
this();
set(regularEmitter);
}
@Override
public void allocateChannels() {
lifeChannel = controller.particles.addChannel(ParticleChannels.Life);
}
@Override
public void start () {
delay = delayValue.active ? delayValue.newLowValue() : 0;
delayTimer = 0;
durationTimer = 0f;
duration = durationValue.newLowValue();
percent = durationTimer / (float)duration;
emission = (int)emissionValue.newLowValue();
emissionDiff = (int)emissionValue.newHighValue();
if (!emissionValue.isRelative())
emissionDiff -= emission;
life = (int)lifeValue.newLowValue();
lifeDiff = (int)lifeValue.newHighValue();
if (!lifeValue.isRelative())
lifeDiff -= life;
lifeOffset = lifeOffsetValue.active ? (int)lifeOffsetValue.newLowValue() : 0;
lifeOffsetDiff = (int)lifeOffsetValue.newHighValue();
if (!lifeOffsetValue.isRelative())
lifeOffsetDiff -= lifeOffset;
}
public void init(){
super.init();
emissionDelta = 0;
durationTimer = duration;
}
public void activateParticles (int startIndex, int count){
int currentTotaLife = life + (int)(lifeDiff * lifeValue.getScale(percent)),
currentLife = currentTotaLife;
int offsetTime = (int)(lifeOffset + lifeOffsetDiff * lifeOffsetValue.getScale(percent));
if (offsetTime > 0) {
if (offsetTime >= currentLife)
offsetTime = currentLife - 1;
currentLife -= offsetTime;
}
float lifePercent = 1 - currentLife / (float)currentTotaLife;
for(int i=startIndex*lifeChannel.strideSize, c = i +count*lifeChannel.strideSize; i < c; i+=lifeChannel.strideSize){
lifeChannel.data[i+ParticleChannels.CurrentLifeOffset] = currentLife;
lifeChannel.data[i+ParticleChannels.TotalLifeOffset] = currentTotaLife;
lifeChannel.data[i+ParticleChannels.LifePercentOffset] = lifePercent;
}
}
public void update () {
int deltaMillis = (int)(controller.deltaTime * 1000);
if (delayTimer < delay) {
delayTimer += deltaMillis;
} else {
boolean emit = emissionMode != EmissionMode.Disabled;
//End check
if (durationTimer < duration) {
durationTimer += deltaMillis;
percent = durationTimer / (float)duration;
}
else {
if (continuous && emit && emissionMode == EmissionMode.Enabled)
controller.start();
else
emit = false;
}
if(emit) {
//Emit particles
emissionDelta += deltaMillis;
float emissionTime = emission + emissionDiff * emissionValue.getScale(percent);
if (emissionTime > 0) {
emissionTime = 1000 / emissionTime;
if (emissionDelta >= emissionTime) {
int emitCount = (int)(emissionDelta / emissionTime);
emitCount = Math.min(emitCount, maxParticleCount - controller.particles.size);
emissionDelta -= emitCount * emissionTime;
emissionDelta %= emissionTime;
addParticles(emitCount);
}
}
if (controller.particles.size < minParticleCount)
addParticles(minParticleCount - controller.particles.size);
}
}
//Update particles
int activeParticles = controller.particles.size;
for (int i = 0, k=0; i < controller.particles.size; ) {
if ( (lifeChannel.data[k+ParticleChannels.CurrentLifeOffset] -= deltaMillis) <= 0) {
controller.particles.removeElement(i);
continue;
}
else {
lifeChannel.data[k+ParticleChannels.LifePercentOffset] = 1- lifeChannel.data[k+ParticleChannels.CurrentLifeOffset]/lifeChannel.data[k+ParticleChannels.TotalLifeOffset];
}
++i;
k+=lifeChannel.strideSize;
}
if(controller.particles.size < activeParticles){
controller.killParticles(controller.particles.size, activeParticles - controller.particles.size);
}
}
private void addParticles (int count) {
count = Math.min(count, maxParticleCount - controller.particles.size);
if (count <= 0) return;
controller.activateParticles (controller.particles.size, count);
controller.particles.size += count;
}
public ScaledNumericValue getLife () {
return lifeValue;
}
public ScaledNumericValue getEmission () {
return emissionValue;
}
public RangedNumericValue getDuration () {
return durationValue;
}
public RangedNumericValue getDelay () {
return delayValue;
}
public ScaledNumericValue getLifeOffset () {
return lifeOffsetValue;
}
public boolean isContinuous () {
return continuous;
}
public void setContinuous (boolean continuous) {
this.continuous = continuous;
}
/** Gets current emission mode.
* @return Current emission mode.*/
public EmissionMode getEmissionMode(){
return emissionMode;
}
/** Sets emission mode. Emission mode does not affect already emitted particles.
* @param emissionMode Emission mode to set.*/
public void setEmissionMode(EmissionMode emissionMode){
this.emissionMode = emissionMode;
}
public boolean isComplete () {
if (delayTimer < delay) return false;
return durationTimer >= duration && controller.particles.size == 0;
}
public float getPercentComplete () {
if (delayTimer < delay) return 0;
return Math.min(1, durationTimer / (float)duration);
}
public void set (RegularEmitter emitter) {
super.set(emitter);
delayValue.load(emitter.delayValue);
durationValue.load(emitter.durationValue);
lifeOffsetValue.load(emitter.lifeOffsetValue);
lifeValue.load(emitter.lifeValue);
emissionValue.load(emitter.emissionValue);
emission = emitter.emission;
emissionDiff = emitter.emissionDiff;
emissionDelta = emitter.emissionDelta;
lifeOffset = emitter.lifeOffset;
lifeOffsetDiff = emitter.lifeOffsetDiff;
life = emitter.life;
lifeDiff = emitter.lifeDiff;
duration = emitter.duration;
delay = emitter.delay;
durationTimer = emitter.durationTimer;
delayTimer = emitter.delayTimer;
continuous = emitter.continuous;
}
@Override
public ParticleControllerComponent copy () {
return new RegularEmitter(this);
}
@Override
public void write (Json json) {
super.write(json);
json.writeValue("continous", continuous);
json.writeValue("emission", emissionValue);
json.writeValue("delay", delayValue);
json.writeValue("duration", durationValue);
json.writeValue("life", lifeValue);
json.writeValue("lifeOffset", lifeOffsetValue);
}
@Override
public void read (Json json, JsonValue jsonData) {
super.read(json, jsonData);
continuous = json.readValue("continous", boolean.class, jsonData);
emissionValue = json.readValue("emission", ScaledNumericValue.class, jsonData);
delayValue = json.readValue("delay", RangedNumericValue.class, jsonData);
durationValue = json.readValue("duration", RangedNumericValue.class, jsonData);
lifeValue = json.readValue("life", ScaledNumericValue.class, jsonData);
lifeOffsetValue = json.readValue("lifeOffset", ScaledNumericValue.class, jsonData);
}
}