67 lines
1.2 KiB
C++
67 lines
1.2 KiB
C++
#ifndef LLMR_UTIL_ANIMATION
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#define LLMR_UTIL_ANIMATION
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#include <llmr/util/noncopyable.hpp>
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#include <llmr/platform/platform.hpp>
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namespace llmr {
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namespace util {
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class animation : private noncopyable {
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public:
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enum state {
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running,
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complete
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};
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animation(double duration)
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: start(platform::time()),
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duration(duration) {}
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double progress() const {
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return (platform::time() - start) / duration;
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}
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virtual state update() const = 0;
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virtual ~animation();
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protected:
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const double start, duration;
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};
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class ease_animation : public animation {
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public:
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ease_animation(double from, double to, double& value, double duration);
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state update() const;
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private:
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const double from, to;
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double& value;
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};
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template <typename T>
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class timeout : public animation {
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public:
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timeout(T final_value, T& value, double duration)
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: animation(duration),
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final_value(final_value),
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value(value) {}
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state update() const {
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if (progress() >= 1) {
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value = final_value;
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return complete;
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} else {
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return running;
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}
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}
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private:
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const T final_value;
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T& value;
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};
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}
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}
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#endif
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