//public Cell CellAt(Time offset, Time meter_start) =>
// cellscircle.ItemsAt(offset)
// .Select(
// cycledcell =>
// new Cell {
// Duration = new Duration {
// Start = cycledcell.Offset + meter_start + cycledcell.Value.Duration.Start,
// Length = cycledcell.Value.Duration.Length
// },
// Stress = cycledcell.Value.Stress
// }
// )
// .Single();
//public IEnumerable<Cell> CellsIn(Duration duration, Time meter_start) =>
// cellscircle.ItemsIn(duration)
// .Select(
// cycledcell =>
// new Cell {
// Duration = new Duration {
// Start = cycledcell.Offset + meter_start + cycledcell.Value.Duration.Start,
// Length = cycledcell.Value.Duration.Length
// },
// Stress = cycledcell.Value.Stress
// }
// );
public static MeterSignature Default(TimeSignature.Simple simple) =>
Default_specialcase_2powX_2powY(simple) ??
Default_specialcase_3X_2powY(simple) ??
new MeterSignature(
simple.Length,
Cell.CreateCells(Enumerable.Repeat(Time.Note / simple.Lower, simple.Upper), 0.8F)
.ToArray()
);
private static MeterSignature Default_specialcase_3X_2powY(TimeSignature.Simple simple)
{
var x = simple.Upper / 3F;
var y = Math.Log(simple.Lower, 2);
if (Math.Round(x) != x ||
Math.Round(y) != y ||
y < 3)
{
return(null);
}
// where y >= 3, x >= 1
var length =
Time.Fraction(simple.Upper, simple.Lower);
return
(new MeterSignature(
simple.Length,
Cell.CreateCells(Enumerable.Repeat(length, (int)x), 0.8F).ToArray()
));
}
private static MeterSignature Default_specialcase_2powX_2powY(TimeSignature.Simple simple)
{
var x = Math.Log(simple.Upper, 2);
var y = Math.Log(simple.Lower, 2);
if (Math.Round(x) != x ||
Math.Round(y) != y)
{
return(null);
}
return
(new MeterSignature(
simple.Length,
Cell.Create_2x_2y(
(int)x,
(int)y,
simple.Length,
0.8F
)
.ToArray()
));
}
