/
BlendableAction.java
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/
BlendableAction.java
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/*
* Copyright (c) 2009-2022 jMonkeyEngine
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* * Neither the name of 'jMonkeyEngine' nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.jme3.anim.tween.action;
import com.jme3.anim.tween.AbstractTween;
import com.jme3.anim.tween.Tween;
import com.jme3.anim.util.HasLocalTransform;
import com.jme3.math.Transform;
import com.jme3.util.clone.Cloner;
import java.util.Collection;
public abstract class BlendableAction extends Action {
protected BlendableAction collectTransformDelegate;
private float transitionWeight = 1.0f;
private double maxTransitionWeight = 1.0;
private double transitionLength = 0.4f;
private float weight = 1f;
private TransitionTween transition = new TransitionTween(transitionLength);
public BlendableAction(Tween... tweens) {
super(tweens);
}
public void setCollectTransformDelegate(BlendableAction delegate) {
this.collectTransformDelegate = delegate;
}
@Override
public boolean interpolate(double t) {
// Sanity check the inputs
if (t < 0) {
return true;
}
if (collectTransformDelegate == null) {
if (transition.getLength() > getLength()) {
transition.setLength(getLength());
}
if(isForward()) {
transition.interpolate(t);
} else {
float v = Math.max((float)(getLength() - t), 0f);
transition.interpolate(v);
}
} else {
transitionWeight = 1f;
}
if (weight == 0) {
//weight is 0 let's not interpolate
return t < getLength();
}
doInterpolate(t);
return t < getLength();
}
public float getWeight() {
return weight;
}
public void setWeight(float weight) {
this.weight = weight;
}
protected abstract void doInterpolate(double t);
public abstract Collection<HasLocalTransform> getTargets();
public abstract void collectTransform(HasLocalTransform target, Transform t, float weight, BlendableAction source);
public double getTransitionLength() {
return transitionLength;
}
public void setTransitionLength(double transitionLength) {
if (transitionLength < 0.0) {
throw new IllegalArgumentException("transitionLength must be greater than or equal to 0");
}
this.transitionLength = transitionLength;
this.transition.setLength(transitionLength);
}
protected float getTransitionWeight() {
return transitionWeight;
}
/**
* @param maxTransitionWeight The max transition weight. Must be >=0 and <=1 (default=1)
* @throws IllegalArgumentException If maxTransitionWeight is not between 0 and 1.
*/
public void setMaxTransitionWeight(double maxTransitionWeight) {
if (maxTransitionWeight < 0.0 || maxTransitionWeight > 1.0) {
throw new IllegalArgumentException("maxTransitionWeight must be between 0 and 1");
}
this.maxTransitionWeight = maxTransitionWeight;
}
/**
*
* @return The max transition weight (default=1)
*/
public double getMaxTransitionWeight() {
return maxTransitionWeight;
}
/**
* Create a shallow clone for the JME cloner.
*
* @return a new action (not null)
*/
@Override
public BlendableAction jmeClone() {
try {
BlendableAction clone = (BlendableAction) super.clone();
return clone;
} catch (CloneNotSupportedException exception) {
throw new RuntimeException(exception);
}
}
/**
* Callback from {@link com.jme3.util.clone.Cloner} to convert this
* shallow-cloned action into a deep-cloned one, using the specified cloner
* and original to resolve copied fields.
*
* @param cloner the cloner that's cloning this action (not null)
* @param original the action from which this action was shallow-cloned
* (unused)
*/
@Override
public void cloneFields(Cloner cloner, Object original) {
super.cloneFields(cloner, original);
collectTransformDelegate = cloner.clone(collectTransformDelegate);
transition = cloner.clone(transition);
}
private class TransitionTween extends AbstractTween {
public TransitionTween(double length) {
super(length);
}
@Override
protected void doInterpolate(double t) {
transitionWeight = (float) Math.min(t, maxTransitionWeight);
}
}
}