project-kyoku/timeline.cpp

133 lines
3.5 KiB
C++
Raw Normal View History

#include "timeline.h"
#include "note.h"
#include <SFML/Graphics/RenderTarget.hpp>
2021-04-08 21:51:59 +02:00
#include <iostream>
Timeline::Timeline()
{
// BPM of METEOR is 170.
// Length is 1:14
// I calculated that the time between beats is about 1412162 microseconds
_timeline.reserve(1000);
microsec starting_beat_offset = 372162;
int amount_of_beats = 209;
microsec interval = 1412162;
microsec note_input_offset = 412162;
microsec bpm_iterator = starting_beat_offset;
microsec bpm_end = starting_beat_offset + (interval * amount_of_beats);
_visibility_offset = note_input_offset * 3;
2021-04-08 21:51:59 +02:00
Note::resetPrecisionQualifier(note_input_offset / 3);
while (bpm_iterator < bpm_end)
{
_timeline.emplace_back(new Note(bpm_iterator, note_input_offset));
bpm_iterator += interval;
}
_timeline[0]->setPosition({200, 200});
_timeline[1]->setPosition({250, 200});
_timeline[2]->setPosition({300, 200});
_timeline[3]->setPosition({350, 200});
_timeline[4]->setPosition({400, 200});
_timeline[5]->setPosition({450, 200});
_timeline[6]->setPosition({200, 300});
_timeline[7]->setPosition({250, 300});
_timeline[8]->setPosition({300, 300});
_timeline[9]->setPosition({350, 300});
_timeline[10]->setPosition({400, 300});
_timeline[11]->setPosition({450, 300});
_active_note = nullptr;
_last_visible_note = _timeline.end();
_top_note = _timeline.begin();
prepareNotesToDraw(0);
}
void Timeline::prepareNotesToDraw(const microsec &music_offset)
{
auto note_iterator = _top_note;
while (((*note_iterator)->offset() - _visibility_offset) >= music_offset)
++note_iterator;
_last_visible_note = note_iterator;
}
Timeline::~Timeline()
{
clear();
}
void Timeline::clear()
{
for (auto note : _timeline)
delete note;
_timeline.clear();
_top_note = _timeline.end();
_last_visible_note = _timeline.end();
_active_note = nullptr;
Note::resetPrecisionQualifier();
}
static sf::RectangleShape createNoteGlyph(const std::vector<Note*>::const_iterator& note_to_draw)
{ // Temporary solution
sf::RectangleShape ret;
const auto position = (*note_to_draw)->position();
ret.setPosition(position.x, position.y);
ret.setFillColor(sf::Color(255, 100, 0));
ret.setSize({10.f, 10.f});
return ret;
}
void Timeline::draw(sf::RenderTarget& target, sf::RenderStates states) const // Temporary solution
{
if (_last_visible_note == _timeline.end() || _top_note > _last_visible_note)
return;
auto note_to_draw = _top_note;
while (note_to_draw != (_last_visible_note + 1))
{
target.draw(createNoteGlyph(note_to_draw), states);
++note_to_draw;
}
}
void Timeline::update(const microsec &music_offset)
{
checkCurrentActiveNote(music_offset);
checkForNextActiveNote(music_offset);
prepareNotesToDraw(music_offset);
}
void Timeline::checkCurrentActiveNote(const microsec &music_offset)
{
if (_active_note && !_active_note->isActive(music_offset))
{
_active_note = nullptr;
++_top_note;
}
}
void Timeline::checkForNextActiveNote(const microsec &music_offset)
{
if (!_active_note && (*_top_note)->isActive(music_offset))
{
std::cout << "New active note: " << music_offset << '\n';
_active_note = *_top_note;
}
}
const Note* Timeline::fetchActiveNote(const microsec &music_offset) noexcept
{
std::cout << "Clicked at: " << music_offset << '\n';
update(music_offset);
return _active_note;
}