// 绘制符杠
private void DrawBeam()
{
// 绘制符杠，根据之前计算出来的起始x坐标和起始y坐标，画到下一个连音符的x坐标，划的长度为乐符之间的间隔width
// 两条符杠之间的间隔
int beamDiff = -ParamsGetter.GetNoteBeamDiff(_note.IsUpOrDown());
if (_note.IsLast())
{
switch (_note.GetLastNote().GetType())
{
case 8:
DrawLine(_beamX, _beamY, 0, _beamY, 2);
break;
case 16:
DrawLine(_beamX, _beamY, 0, _beamY, 2);
DrawLine(_beamX, _beamY + beamDiff, 0, _beamY + beamDiff, 2);
break;
case 64:
DrawLine(_beamX, _beamY, 0, _beamY, 2);
DrawLine(_beamX, _beamY + beamDiff, 0, _beamY + beamDiff, 2);
DrawLine(_beamX, _beamY + 2 * beamDiff, 0, _beamY + 2 * beamDiff, 2);
break;
default: break;
}
if (_note.GetLastNote().GetDot() != 0)
{
switch ((int)(_note.GetLastNote().GetType() * Math.Pow(2, _note.GetLastNote().GetDot())))
{
case 16:
DrawLine(_beamX, _beamY + beamDiff, 0, _beamY + beamDiff, 2);
break;
case 32:
DrawLine(_beamX, _beamY + beamDiff, 0, _beamY + beamDiff, 2);
DrawLine(_beamX, _beamY + 2 * beamDiff, 0, _beamY + 2 * beamDiff, 2);
break;
default: break;
}
}
}
if (_note.IsNext())
{
switch (_note.GetType())
{
case 8:
DrawLine(_beamX - 1, _beamY, Width, _beamY, 2);
break;
case 16:
DrawLine(_beamX - 1, _beamY, Width, _beamY, 2);
DrawLine(_beamX - 1, _beamY + beamDiff, Width, _beamY + beamDiff, 2);
break;
case 32:
DrawLine(_beamX - 1, _beamY, Width, _beamY, 2);
DrawLine(_beamX - 1, _beamY + beamDiff, Width, _beamY + beamDiff, 2);
DrawLine(_beamX - 1, _beamY + 2 * beamDiff, Width, _beamY + 2 * beamDiff, 2);
break;
default: break;
}
if (_note.GetDot() != 0)
{
int temp = (int)Math.Pow(2, _note.GetDot());
int start = (2 * temp - 1) * Width / (2 * temp);
switch (_note.GetType() * temp)
{
case 16:
DrawLine(start, _beamY + beamDiff, Width, _beamY + beamDiff, 2);
break;
case 32:
DrawLine(start, _beamY + beamDiff, Width, _beamY + beamDiff, 2);
DrawLine(start, _beamY + 2 * beamDiff, Width, _beamY + 2 * beamDiff, 2);
break;
default: break;
}
}
}
}
