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91 lines
2.3 KiB
91 lines
2.3 KiB
#ifndef Magnum_Timeline_h |
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#define Magnum_Timeline_h |
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/* |
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Copyright © 2010, 2011, 2012 Vladimír Vondruš <mosra@centrum.cz> |
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This file is part of Magnum. |
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Magnum is free software: you can redistribute it and/or modify |
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it under the terms of the GNU Lesser General Public License version 3 |
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only, as published by the Free Software Foundation. |
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Magnum is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU Lesser General Public License version 3 for more details. |
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*/ |
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#include <chrono> |
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#include "Magnum.h" |
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#include "magnumVisibility.h" |
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/** @file |
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* @brief Class Magnum::Timeline |
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*/ |
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namespace Magnum { |
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/** @brief %Timeline */ |
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class MAGNUM_EXPORT Timeline { |
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public: |
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/** |
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* @brief Constructor |
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* |
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* Constructs stopped timeline. |
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* @see start() |
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*/ |
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inline constexpr Timeline(): _minimalFrameTime(0), _previousFrameDuration(0), running(false) {} |
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/** @brief Minimal frame time (in seconds) */ |
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GLfloat minimalFrameTime() const { return _minimalFrameTime; } |
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/** |
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* @brief Set minimal frame time |
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* |
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* @see nextFrame() |
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*/ |
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void setMinimalFrameTime(GLfloat seconds) { |
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_minimalFrameTime = seconds; |
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} |
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/** |
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* @brief Start timeline |
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* |
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* Sets previous frame duration to `0`. |
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* @see stop(), previousFrameDuration() |
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*/ |
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void start(); |
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/** |
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* @brief Stop timeline |
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*/ |
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void stop(); |
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/** |
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* @brief Advance to next frame |
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* |
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* If current frame time is smaller than minimal frame time, pauses |
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* the execution for remaining time. |
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* @note This function does nothing if the timeline is stopped. |
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* @see setMinimalFrameTime() |
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*/ |
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void nextFrame(); |
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/** @brief Duration of previous frame */ |
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inline constexpr GLfloat previousFrameDuration() const { |
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return _previousFrameDuration; |
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} |
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private: |
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std::chrono::high_resolution_clock::time_point previousFrameTime; |
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GLfloat _minimalFrameTime; |
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GLfloat _previousFrameDuration; |
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bool running; |
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}; |
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} |
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#endif
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