public static IEnumerable <ITopoArray <Tile> > GetRotatedSamples(
ITopoArray <Tile> sample,
int rotationalSymmetry,
bool reflectionalSymmetry,
TileRotation tileRotation = null)
{
if (sample.Topology.Directions.Type == DirectionsType.Hexagonal2d)
{
var reflections = reflectionalSymmetry ? 2 : 1;
for (var r = 0; r < reflections; r++)
{
for (var i = 0; i < 6; i += (6 / rotationalSymmetry))
{
yield return(TopoArrayUtils.HexRotate(sample, i, r > 0, tileRotation));
}
}
}
else
{
var reflections = reflectionalSymmetry ? 2 : 1;
for (var r = 0; r < reflections; r++)
{
for (var i = 0; i < 4; i += (4 / rotationalSymmetry))
{
yield return(TopoArrayUtils.Rotate(sample, i, r > 0, tileRotation));
}
}
}
}
public static IEnumerable <ITopoArray <Tile> > GetRotatedSamples(
ITopoArray <Tile> sample,
TileRotation tileRotation = null)
{
tileRotation = tileRotation ?? new TileRotation();
foreach (var rotation in tileRotation.RotationGroup)
{
if (sample.Topology.Directions.Type == DirectionsType.Hexagonal2d)
{
yield return(TopoArrayUtils.HexRotate(sample, rotation, tileRotation));
}
else
{
yield return(TopoArrayUtils.Rotate(sample, rotation, tileRotation));
}
}
}
public void TestHexRotate()
{
var a = new int[2, 2];
a[0, 0] = 1; a[1, 0] = 2;
a[0, 1] = 3; a[1, 1] = 4;
var ta = TopoArray.Create(a, new Topology(DirectionSet.Hexagonal2d, 2, 2, false, false));
var r5 = TopoArrayUtils.HexRotate(ta, new Rotation(5 * 60, false));
Assert.AreEqual(2, r5.Get(0, 0));
Assert.AreEqual(1, r5.Get(0, 1)); Assert.AreEqual(4, r5.Get(1, 1));
Assert.AreEqual(3, r5.Get(1, 2));
var r1 = TopoArrayUtils.HexRotate(ta, new Rotation(1 * 60, false));
Assert.AreEqual(3, r1.Get(0, 0)); Assert.AreEqual(1, r1.Get(1, 0));
Assert.AreEqual(4, r1.Get(1, 1)); Assert.AreEqual(2, r1.Get(2, 1));
var r2 = TopoArrayUtils.HexRotate(ta, new Rotation(2 * 60, false));
Assert.AreEqual(3, r2.Get(0, 0));
Assert.AreEqual(4, r2.Get(0, 1)); Assert.AreEqual(1, r2.Get(1, 1));
Assert.AreEqual(2, r2.Get(1, 2));
var r3 = TopoArrayUtils.HexRotate(ta, new Rotation(3 * 60, false));
Assert.AreEqual(4, r3.Get(0, 0)); Assert.AreEqual(3, r3.Get(1, 0));
Assert.AreEqual(2, r3.Get(0, 1)); Assert.AreEqual(1, r3.Get(1, 1));
var refl = TopoArrayUtils.HexRotate(ta, new Rotation(0 * 60, true));
Assert.AreEqual(2, refl.Get(0, 0)); Assert.AreEqual(1, refl.Get(1, 0));
Assert.AreEqual(4, refl.Get(1, 1)); Assert.AreEqual(3, refl.Get(2, 1));
}