86 lines
2.0 KiB
C++
86 lines
2.0 KiB
C++
//
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// VROAnimation.h
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// ViroRenderer
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//
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// Created by Raj Advani on 12/15/15.
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// Copyright © 2015 Viro Media. All rights reserved.
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//
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#ifndef VROAnimation_h
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#define VROAnimation_h
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#include <stdio.h>
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#include <memory>
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#include <functional>
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#include "VROAnimatable.h"
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/*
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Represents the animation of a property. Subclasses identify the type
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of the property (e.g. animating a floating point value, animating a
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VROVector3f, etc.).
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*/
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class VROAnimation {
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public:
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VROAnimation() {}
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VROAnimation(std::function<void(VROAnimatable *const)> finishCallback) :
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_finishCallback(finishCallback)
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{}
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virtual ~VROAnimation() {}
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/*
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Set the animatable. This is typically the object holding the
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property to be animated. It is stored by a weak_ptr so we can
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ensure it hasn't been deallocated before invoking the animation
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each frame.
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*/
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void setAnimatable(std::shared_ptr<VROAnimatable> animatable) {
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_animatable = animatable;
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}
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/*
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Set a function to invoke when the animation completes.
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*/
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void setFinishCallback(std::function<void(VROAnimatable *const)> callback) {
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_finishCallback = callback;
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}
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/*
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Move the property to its value corresponding to t [0, 1].
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*/
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virtual void processAnimationFrame(float t) = 0;
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/*
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Immediately finish this animation by moving its value to the
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end state.
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*/
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virtual void finish() = 0;
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/*
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Invoke after the animation is completed.
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*/
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void onTermination() {
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finish();
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std::shared_ptr<VROAnimatable> animatable = _animatable.lock();
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if (animatable == nullptr){
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return;
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}
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animatable->onAnimationFinished();
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if (_finishCallback) {
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_finishCallback(animatable.get());
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}
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}
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protected:
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std::weak_ptr<VROAnimatable> _animatable;
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std::function<void(VROAnimatable *const)> _finishCallback;
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};
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#endif /* VROAnimation_h */
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