com.badlogic.gdx.scenes.scene2d.actions.MoveBy Maven / Gradle / Ivy

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/*******************************************************************************
 * Copyright 2011 See AUTHORS file.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/

package com.badlogic.gdx.scenes.scene2d.actions;

import com.badlogic.gdx.scenes.scene2d.Action;
import com.badlogic.gdx.scenes.scene2d.Actor;
import com.badlogic.gdx.scenes.scene2d.AnimationAction;

public class MoveBy extends AnimationAction {

	private static final ActionResetingPool pool = new ActionResetingPool(4, 100) {
		@Override
		protected MoveBy newObject () {
			return new MoveBy();
		}
	};

	protected float initialX;
	protected float initialY;
	protected float x;
	protected float y;
	protected float startX;
	protected float startY;
	protected float deltaX;
	protected float deltaY;

	public static MoveBy $ (float x, float y, float duration) {
		MoveBy action = pool.obtain();
		action.x = action.initialX = x;
		action.y = action.initialY = y;
		action.duration = duration;
		action.invDuration = 1 / duration;
		return action;
	}

	@Override
	public void setTarget (Actor actor) {
		this.target = actor;
		this.startX = target.x;
		this.startY = target.y;
		this.deltaX = x;
		this.deltaY = y;
		this.x = target.x + x;
		this.y = target.y + y;
		this.taken = 0;
		this.done = false;
	}

	@Override
	public void act (float delta) {
		float alpha = createInterpolatedAlpha(delta);
		if (done) {
			target.x = x;
			target.y = y;
		} else {
			target.x = startX + deltaX * alpha;
			target.y = startY + deltaY * alpha;
		}
	}

	@Override
	public void finish () {
		super.finish();
		pool.free(this);
	}

	@Override
	public Action copy () {
		MoveBy moveBy = $(initialX, initialY, duration);
		if (interpolator != null) moveBy.setInterpolator(interpolator.copy());
		return moveBy;
	}
}