mirror of
https://github.com/EsotericSoftware/spine-runtimes.git
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120 lines
4.0 KiB
Java
120 lines
4.0 KiB
Java
/*******************************************************************************
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* Copyright (c) 2013, Esoteric Software
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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******************************************************************************/
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package com.esotericsoftware.spine;
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import com.badlogic.gdx.math.MathUtils;
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/** Stores state for an animation and automatically mixes between animations. */
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public class AnimationState {
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private final AnimationStateData data;
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Animation current, previous;
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float currentTime, previousTime;
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boolean currentLoop, previousLoop;
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float mixTime, mixDuration;
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public AnimationState (AnimationStateData data) {
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if (data == null) throw new IllegalArgumentException("data cannot be null.");
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this.data = data;
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}
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public void update (float delta) {
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currentTime += delta;
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previousTime += delta;
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mixTime += delta;
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}
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public void apply (Skeleton skeleton) {
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if (current == null) return;
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if (previous != null) {
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previous.apply(skeleton, previousTime, previousLoop);
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float alpha = mixTime / mixDuration;
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if (alpha >= 1) {
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alpha = 1;
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previous = null;
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}
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current.mix(skeleton, currentTime, currentLoop, alpha);
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} else
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current.apply(skeleton, currentTime, currentLoop);
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}
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public void clearAnimation () {
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previous = null;
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current = null;
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}
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/** @see #setAnimation(Animation, boolean) */
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public void setAnimation (String animationName, boolean loop) {
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Animation animation = data.getSkeletonData().findAnimation(animationName);
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if (animation == null) throw new IllegalArgumentException("Animation not found: " + animationName);
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setAnimation(animation, loop);
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}
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/** Set the current animation. The current animation time is set to 0.
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* @param animation May be null. */
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public void setAnimation (Animation animation, boolean loop) {
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previous = null;
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if (animation != null && current != null) {
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mixDuration = data.getMix(current, animation);
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if (mixDuration > 0) {
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mixTime = 0;
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previous = current;
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previousTime = currentTime;
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previousLoop = currentLoop;
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}
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}
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current = animation;
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currentLoop = loop;
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currentTime = 0;
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}
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/** @return May be null. */
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public Animation getAnimation () {
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return current;
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}
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/** Returns the time within the current animation. */
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public float getTime () {
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return currentTime;
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}
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public void setTime (float time) {
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currentTime = time;
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}
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/** Returns true if no animation is set or if the current time is greater than the animation duration, regardless of looping. */
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public boolean isComplete () {
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return current == null || currentTime >= current.getDuration();
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}
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public AnimationStateData getData () {
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return data;
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}
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public String toString () {
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return (current != null && current.getName() != null) ? current.getName() : super.toString();
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}
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}
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