com.dongbat.invasion.util.EffectUtil.java Source code

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Here is the source code for com.dongbat.invasion.util.EffectUtil.java

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package com.dongbat.invasion.util;

import com.artemis.Entity;
import com.badlogic.gdx.math.MathUtils;
import com.badlogic.gdx.math.Vector2;
import com.dongbat.invasion.component.DisplayPosition;
import com.dongbat.invasion.component.SpriteAnimation;

/**
 *
 * @author password
 */
public class EffectUtil {

    private static final float SINGLE_EXPLOSION_RADIUS = 20; // pixel

    /**
     * Create explosions
     *
     * @param physPos physical position, center point for explosions
     * @param physRadius the radius where explosion can spawn
     * @param duration the duration to randomize the spawning time of explosion
     */
    public static void explode(Vector2 physPos, float physRadius, int duration) {
        Vector2 position = RenderCameraUtil.physicsToRenderCoords(physPos);
        float radius = physRadius * PhysicsCameraUtil.getRatio();

        int count;
        if (radius <= SINGLE_EXPLOSION_RADIUS) {
            count = 1;
        } else if (radius > SINGLE_EXPLOSION_RADIUS && radius <= SINGLE_EXPLOSION_RADIUS * 2) {
            count = 4;
        } else if (radius > SINGLE_EXPLOSION_RADIUS * 2 && radius <= SINGLE_EXPLOSION_RADIUS * 4) {
            count = 8;
        } else {
            count = 12;
        }

        if (count == 1) {
            createSingleExplosion(position, 0);
            return;
        }

        for (int i = 0; i < count; i++) {
            Vector2 pos = new Vector2(position);
            pos.x += MathUtils.random(-radius, radius);
            pos.y += MathUtils.random(-radius, radius);
            int delay = MathUtils.random(duration);

            createSingleExplosion(pos, delay);
        }
    }

    private static void createSingleExplosion(Vector2 position, int delay) {
        EntityUtil.addCreator(TimeUtil.getGameTime() + delay, new ExplosionCreator(position));
    }

    private static class ExplosionCreator extends EntityUtil.EntityCreator {

        private final Vector2 position;

        public ExplosionCreator(Vector2 position) {
            this.position = position;
        }

        @Override
        public void create() {
            String name = "effects/explosion";
            SpriteAnimation spriteAnimation = new SpriteAnimation();
            spriteAnimation.addAnimation(name, AnimationUtil.get(name, 0.1f));
            spriteAnimation.setCurrent(name, false);
            spriteAnimation.setCallback(new DeleteAfterFinished());

            DisplayPosition displayPosition = new DisplayPosition(position);

            Entity explosion = ECSUtil.getWorld().createEntity();
            explosion.edit().add(displayPosition).add(spriteAnimation);
        }
    }

    private static class DeleteAfterFinished implements SpriteAnimation.AnimationFinishedCallback {

        @Override
        public void finished(Entity entity) {
            entity.deleteFromWorld();
        }
    }
}