public void Test_EncodedS2CellIdVector_FractalS2ShapeIndexCells()
{
S2Testing.Fractal fractal = new();
fractal.SetLevelForApproxMaxEdges(3 * 1024);
S2Point center = MakePointOrDie("47.677:-122.206");
MutableS2ShapeIndex index = new();
index.Add(new S2Loop.Shape(
fractal.MakeLoop(S2.GetFrame(center), S1Angle.FromDegrees(1))));
List <S2CellId> ids = new();
foreach (var shape in index.GetNewEnumerable())
{
ids.Add(shape.Item1);
}
Assert.Equal(966, ids.Count);
TestEncodedS2CellIdVector(ids, 2902);
}
public void Test_S2_Frames()
{
var z = new S2Point(0.2, 0.5, -3.3).Normalize();
var m = S2.GetFrame(z);
Assert.True(S2.ApproxEquals(m.Col(2), z));
Assert.True(m.Col(0).IsUnitLength());
Assert.True(m.Col(1).IsUnitLength());
Assert2.DoubleEqual(m.Det(), 1);
Assert.True(S2.ApproxEquals(S2.ToFrame(m, m.Col(0)), new(1, 0, 0)));
Assert.True(S2.ApproxEquals(S2.ToFrame(m, m.Col(1)), new(0, 1, 0)));
Assert.True(S2.ApproxEquals(S2.ToFrame(m, m.Col(2)), new(0, 0, 1)));
Assert.True(S2.ApproxEquals(S2.FromFrame(m, new(1, 0, 0)), m.Col(0)));
Assert.True(S2.ApproxEquals(S2.FromFrame(m, new(0, 1, 0)), m.Col(1)));
Assert.True(S2.ApproxEquals(S2.FromFrame(m, new(0, 0, 1)), m.Col(2)));
}