39 lines
1.2 KiB
Java
39 lines
1.2 KiB
Java
package com.saltosion.gladiator.systems;
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import com.badlogic.ashley.core.ComponentMapper;
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import com.badlogic.ashley.core.Engine;
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import com.badlogic.ashley.core.Entity;
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import com.badlogic.ashley.core.EntitySystem;
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import com.badlogic.ashley.core.Family;
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import com.badlogic.ashley.utils.ImmutableArray;
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import com.saltosion.gladiator.components.CParticle;
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import com.saltosion.gladiator.util.AppUtil;
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public class ParticleSystem extends EntitySystem {
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private static final ComponentMapper<CParticle> pm = ComponentMapper.getFor(CParticle.class);
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private ImmutableArray<Entity> entities;
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@Override
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public void addedToEngine(Engine engine) {
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updateEntities(engine);
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}
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@Override
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public void update(float deltaTime) {
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for (int i = 0; i < entities.size(); i++) {
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CParticle particle = pm.get(entities.get(i));
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particle.getPosition().add(particle.getVelocity().cpy().scl(deltaTime));
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particle.getVelocity().add(particle.getGravity().cpy().scl(deltaTime));
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if (System.currentTimeMillis() - particle.getCreationTime() > particle.getDecayTime()) {
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AppUtil.engine.removeEntity(entities.get(i));
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}
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}
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}
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public void updateEntities(Engine engine) {
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entities = engine.getEntitiesFor(Family.getFor(CParticle.class));
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}
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}
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