Henrik Hautakoski
e10daeaaa6
When writing the X11 (linux) implementation there was a problem with X11 defining a "Display" type and we also have a Display class in the engine. So to fix that problem and minimize the risk for running into other name conflicts. We move everything from global namespace.
80 lines
No EOL
1.2 KiB
C++
80 lines
No EOL
1.2 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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m_acc = 0;
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m_current = system::getMilliseconds();
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m_lastUpdate = m_current;
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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;
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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 = (1000.0f / ((double) updates_per_sec));
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reset();
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}
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unsigned long GameTime::getElapsed() const
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{
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return m_current - m_lastUpdate;
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}
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bool GameTime::beginFrame()
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{
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reset();
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accumulateTime();
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if (m_acc > m_slice) {
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m_inLoop = true;
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}
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return m_inLoop;
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}
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bool GameTime::tick()
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{
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if (m_acc > m_slice) {
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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_lastUpdate = m_current;
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m_inLoop = false;
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}
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void GameTime::accumulateTime()
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{
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updateTime();
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m_acc += (double) (m_current - m_lastUpdate);
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if (m_acc > (1000.f / m_slice)) {
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m_acc = 1000.f / m_slice;
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}
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}
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void GameTime::updateTime()
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{
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m_current = system::getMilliseconds();
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// Just to be safe. check so we don't get a negative interval.
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if (m_current < m_lastUpdate) {
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m_lastUpdate = m_current;
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}
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}
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} // namespace sp
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