66 lines
1 KiB
C++
66 lines
1 KiB
C++
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#include <iostream>
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#include <Spectre/Game/GameTime.h>
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#include <Spectre/System/System.h>
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namespace sp {
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GameTime::GameTime(unsigned long updates_per_sec)
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{
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setTimeStep(updates_per_sec);
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}
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double GameTime::getTimeStep() const
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{
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return m_slice.milliseconds();
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}
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void GameTime::setTimeStep(unsigned long updates_per_sec)
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{
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m_slice = Time::seconds(1.0f / ((double) updates_per_sec));
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reset();
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}
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Time GameTime::getElapsed() const
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{
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return m_watch.elapsed();
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}
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bool GameTime::beginFrame()
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{
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accumulateTime();
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// Signal if we should tick
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return shouldTick();
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}
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bool GameTime::shouldTick() const
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{
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// if acc is larger than one slice, we have atleast one tick.
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return m_acc > m_slice;
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}
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bool GameTime::tick()
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{
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if (shouldTick()) {
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m_acc -= m_slice;
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return true;
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}
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return false;
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}
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void GameTime::reset()
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{
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m_watch.restart();
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}
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void GameTime::accumulateTime()
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{
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m_acc += m_watch.restart();
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if (m_acc.seconds() > (1.0f / m_slice.seconds())) {
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m_acc = Time::seconds(1.0f / m_slice.seconds());
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}
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}
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} // namespace sp
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