forked from NaiJi/project-kyoku
68 lines
1.5 KiB
C++
68 lines
1.5 KiB
C++
#include "timeline.h"
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#include "note.h"
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Timeline::Timeline()
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{
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// BPM of METEOR is 170.
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// Length is 1:14
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// I calculated that the time between beats is about 1412162 microseconds
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microsec starting_beat_offset = 372162;
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int amount_of_beats = 209;
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microsec time_between_beats = 1412162;
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microsec note_input_offset = 412162;
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microsec interval = starting_beat_offset + (time_between_beats * amount_of_beats);
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Note::resetPrecisionQualifier(note_input_offset / 2);
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while (interval > 0)
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{
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_timeline.emplace_back(new Note(interval, note_input_offset));
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interval -= time_between_beats;
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}
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_active_note = nullptr;
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_top_note = _timeline.begin();
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}
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Timeline::~Timeline()
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{
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for (auto note : _timeline)
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delete note;
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_timeline.clear();
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_top_note = _timeline.end();
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_active_note = nullptr;
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Note::resetPrecisionQualifier();
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}
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void Timeline::update(const microsec µseconds)
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{
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checkCurrentActiveNote(microseconds);
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checkForNextActiveNote(microseconds);
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}
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void Timeline::checkCurrentActiveNote(const microsec µseconds)
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{
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if (_active_note && !_active_note->isActive(microseconds))
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{
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_active_note = nullptr;
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++_top_note;
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}
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}
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void Timeline::checkForNextActiveNote(const microsec µseconds)
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{
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if (!_active_note && (*_top_note)->isActive(microseconds))
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{
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_active_note = *_top_note;
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}
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}
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const Note* Timeline::fetchActiveNote(const microsec µseconds) noexcept
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{
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update(microseconds);
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return _active_note;
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}
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