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58 lines
1.7 KiB
58 lines
1.7 KiB
#include "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 <Utility/Debug.h> |
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#include <Utility/utilities.h> |
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using namespace std::chrono; |
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namespace Magnum { |
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void Timeline::start() { |
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running = true; |
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_startTime = high_resolution_clock::now(); |
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_previousFrameTime = _startTime; |
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_previousFrameDuration = 0; |
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} |
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void Timeline::stop() { |
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running = false; |
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_startTime = high_resolution_clock::time_point(); |
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_previousFrameTime = _startTime; |
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_previousFrameDuration = 0; |
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} |
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void Timeline::nextFrame() { |
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if(!running) return; |
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auto now = high_resolution_clock::now(); |
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std::uint32_t duration = duration_cast<microseconds>(now-_previousFrameTime).count(); |
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_previousFrameDuration = duration/1e6f; |
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if(_previousFrameDuration < _minimalFrameTime) { |
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Corrade::Utility::sleep(_minimalFrameTime*1000 - duration/1000); |
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now = high_resolution_clock::now(); |
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_previousFrameDuration = duration_cast<microseconds>(now-_previousFrameTime).count()/1e6f; |
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} |
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_previousFrameTime = now; |
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} |
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GLfloat Timeline::previousFrameTime() const { |
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return duration_cast<microseconds>(_previousFrameTime-_startTime).count()/1e6f; |
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} |
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}
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