fix beat decrease

src/gameplay/beat_system.cpp

@@ -26,6 +26,7 @@ namespace phase_shifter::gameplay {
 			i++;
 		}
 
+		_state.beats_left = static_cast<int>(_time_stamps.size());
 		_state.avg_beat_time =
 		        static_cast<float>(_time_stamps[_time_stamps.size() - 1]) / _time_stamps.size();
 	}
@@ -35,11 +36,13 @@ namespace phase_shifter::gameplay {
 		_acc += dt.value();
 		int  size = static_cast<int>(_time_stamps.size());
 		auto beat = _beat_index + 1 < size && _acc >= _time_stamps[_beat_index + 1];
+		int  beats_left = _state.beats_left;
 		if(beat) {
 			_beat_index++;
 			LOG(plog::debug) << "beat";
 
-			if(_beat_index + 1 >= size) {
+			beats_left = size - 1 - _beat_index - _beat_offset;
+			if(beats_left <= 0) {
 				_bus.send<Lose_msg>();
 			}
 		}
@@ -48,7 +51,7 @@ namespace phase_shifter::gameplay {
 		          _beat_index >= 0 ? _acc - _time_stamps[_beat_index] : _acc,
 		          _beat_index + 1 < size ? _time_stamps[_beat_index + 1] - _acc : 999,
 		          _state.avg_beat_time,
-		          size - 1 - _beat_index};
+		          beats_left};
 	}
 
 	auto Beat_system::graphic_time_scale() const -> float
@@ -67,6 +70,7 @@ namespace phase_shifter::gameplay {
 
 	void Beat_system::decrease_beats_left(int count)
 	{
+		_beat_offset -= count;
 		if(_state.beats_left > 0) {
 			_state.beats_left -= count;
 

src/gameplay/beat_system.hpp

@@ -39,6 +39,7 @@ namespace phase_shifter::gameplay {
 		float                       _acc = 0.f;
 		std::vector<float>          _time_stamps;
 		int                         _beat_index = -1;
+		int                         _beat_offset = 0;
 	};
 
 } // namespace phase_shifter::gameplay