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AnimationAction.java
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/
AnimationAction.java
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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;
/** An {@link AnimationAction} performs a transformation on its target {@link Actor}. These transformations physically change the
* Actor itself.
*
* @author Moritz Post <moritzpost@gmail.com> */
public abstract class AnimationAction extends Action {
protected float duration;
protected float invDuration;
protected float taken;
protected Actor target;
protected boolean done;
protected Interpolator interpolator;
@Override
public boolean isDone () {
return done;
}
@Override
public void finish () {
super.finish();
if (interpolator != null) {
interpolator.finished();
}
}
/** Sets an {@link Interpolator} to modify the progression of the animations.
*
* @param interpolator the interpolator to use during the animation
* @return an instance of self so that the call can be easily chained */
public AnimationAction setInterpolator (Interpolator interpolator) {
this.interpolator = interpolator;
return this;
}
protected float createInterpolatedAlpha (float delta) {
taken += delta;
if (taken >= duration) {
taken = duration;
done = true;
return taken;
} else if (interpolator == null) {
return taken * invDuration;
} else {
return interpolator.getInterpolation(taken * invDuration);
}
}
public Actor getTarget () {
return target;
}
@Override
public void reset () {
super.reset();
interpolator = null;
}
}