com.dongbat.game.buff.effects.AttractedToSource.java Source code

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Here is the source code for com.dongbat.game.buff.effects.AttractedToSource.java

Source

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package com.dongbat.game.buff.effects;

import com.artemis.Entity;
import com.artemis.World;
import com.badlogic.gdx.math.Vector2;
import com.dongbat.game.buff.BuffEffect;
import com.dongbat.game.util.MovementUtil;
import com.dongbat.game.util.PhysicsUtil;

/**
 *
 * @author BINHDUONG
 */
public class AttractedToSource implements BuffEffect {

    private float forceStrength;

    private boolean ignoreMass = true;

    @Override
    public void durationStart(World world, Entity source, Entity t) {
        MovementUtil.disableMovement(t);
        PhysicsUtil.setVelocity(world, t, new Vector2());
    }

    @Override
    public void update(World world, Entity source, Entity target) {
        if (null == source || !source.isActive() || PhysicsUtil.getBody(world, source) == null) {
            return;
        }
        Vector2 impulse = PhysicsUtil.getPosition(world, source).cpy().sub(PhysicsUtil.getPosition(world, target))
                .nor().scl(forceStrength);
        if (ignoreMass) {
            impulse.scl(PhysicsUtil.getBody(world, target).getMass());
        }
        PhysicsUtil.applyImpulse(world, target, impulse);
    }

    @Override
    public void durationEnd(World world, Entity source, Entity target) {
        MovementUtil.enableMovement(target);
        PhysicsUtil.setVelocity(world, target, new Vector2());
    }

}