32 lines
824 B
C++
32 lines
824 B
C++
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#pragma once
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namespace big
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{
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class animator
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{
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std::chrono::time_point<std::chrono::system_clock> animation_start_time;
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std::chrono::time_point<std::chrono::system_clock> animation_current_time;
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float animation_curve(float t) {
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return 3 * pow(1.f - t, 2.f) * t +
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3 * (1.f - t) * pow(t, 2.f) +
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pow(t, 3.f);
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}
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public:
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void animate(int milliseconds, std::function<void(float&)> cb) {
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animation_current_time = std::chrono::system_clock::now();
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float timeDiff = (float)std::chrono::duration_cast<std::chrono::milliseconds>(animation_current_time - animation_start_time).count();
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float t = timeDiff / milliseconds;
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if (t > 1) {
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t = 1;
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}
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float progress = animation_curve(t);
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cb(progress);
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}
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void reset() {
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animation_start_time = std::chrono::system_clock::now();
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}
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};
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}
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