35 lines
865 B
C++
35 lines
865 B
C++
#pragma once
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#include <chrono>
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/*
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Usage:
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When creating animation constructor takes one parameter - how long
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should the animation take in seconds.
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Call reset() when starting animation.
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When rendering, call value() to get value from 0 to 1 - depending on animation
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progress.
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*/
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class Animation
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{
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public:
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enum AnimFunctions
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{
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LINEAR = 0,
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EASE_OUT_EXPO
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};
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Animation(double duration = 1, double start = 0, double stop = 1);
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void reset();
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void reset(double duration);
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void reset(double duration, double start, double stop);
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double value(AnimFunctions apply_function) const;
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bool done() const;
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private:
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static double apply_animation_function(double t, AnimFunctions apply_function);
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std::chrono::high_resolution_clock::time_point start;
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double start_value, end_value, duration;
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};
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