public static ITopoArray <T> Rotate <T>(ITopoArray <T> original, int rotateCw, bool reflectX = false, TileRotate <T> tileRotate = null)
{
if (rotateCw == 0 && !reflectX)
{
return(original);
}
ValueTuple <int, int> MapCoord(int x, int y)
{
return(RotateVector(x, y, rotateCw, reflectX));
}
return(RotateInner(original, MapCoord, tileRotate));
}
private static ITopoArray <T> RotateInner <T>(ITopoArray <T> original, Func <int, int, ValueTuple <int, int> > mapCoord, TileRotate <T> tileRotate = null)
{
// Find new bounds
var(x1, y1) = mapCoord(0, 0);
var(x2, y2) = mapCoord(original.Topology.Width - 1, 0);
var(x3, y3) = mapCoord(original.Topology.Width - 1, original.Topology.Height - 1);
var(x4, y4) = mapCoord(0, original.Topology.Height - 1);
var minx = Math.Min(Math.Min(x1, x2), Math.Min(x3, x4));
var maxx = Math.Max(Math.Max(x1, x2), Math.Max(x3, x4));
var miny = Math.Min(Math.Min(y1, y2), Math.Min(y3, y4));
var maxy = Math.Max(Math.Max(y1, y2), Math.Max(y3, y4));
// Arrange so that co-ordinate transfer is into the rect bounced by width, height
var offsetx = -minx;
var offsety = -miny;
var width = maxx - minx + 1;
var height = maxy - miny + 1;
var depth = original.Topology.Depth;
var mask = new bool[width * height * depth];
var topology = new Topology(original.Topology.Directions, width, height, original.Topology.Depth, false, false, false, mask);
var values = new T[width, height, depth];
// Copy from original to values based on the rotation, setting up the mask as we go.
for (var z = 0; z < original.Topology.Depth; z++)
{
for (var y = 0; y < original.Topology.Height; y++)
{
for (var x = 0; x < original.Topology.Width; x++)
{
var(newX, newY) = mapCoord(x, y);
newX += offsetx;
newY += offsety;
int newIndex = topology.GetIndex(newX, newY, z);
var newValue = original.Get(x, y, z);
bool hasNewValue = true;
if (tileRotate != null)
{
hasNewValue = tileRotate(newValue, out newValue);
}
values[newX, newY, z] = newValue;
mask[newIndex] = hasNewValue && original.Topology.ContainsIndex(original.Topology.GetIndex(x, y, z));
}
}
}
return(new TopoArray3D <T>(values, topology));
}
public static ITopoArray <T> HexRotate <T>(ITopoArray <T> original, int rotateCw, bool reflectX, TileRotate <T> tileRotate = null)
{
if (rotateCw == 0 && !reflectX)
{
return(original);
}
var microRotate = rotateCw % 3;
var rotate180 = rotateCw % 2 == 1;
// Actually do a reflection/rotation
ValueTuple <int, int> MapCoord(int x, int y)
{
return(HexRotateVector(x, y, microRotate, rotate180, reflectX));
}
return(RotateInner(original, MapCoord, tileRotate));
}
public static ITopoArray <T> HexRotate <T>(ITopoArray <T> original, Rotation rotation, TileRotate <T> tileRotate = null)
{
if (rotation.IsIdentity)
{
return(original);
}
var microRotate = (rotation.RotateCw / 60) % 3;
var rotate180 = (rotation.RotateCw / 60) % 2 == 1;
// Actually do a reflection/rotation
ValueTuple <int, int> MapCoord(int x, int y)
{
return(HexRotateVector(x, y, microRotate, rotate180, rotation.ReflectX));
}
return(RotateInner(original, MapCoord, tileRotate));
}
public static ITopoArray <T> SquareRotate <T>(ITopoArray <T> original, Rotation rotation, TileRotate <T> tileRotate = null)
{
if (rotation.IsIdentity)
{
return(original);
}
ValueTuple <int, int> MapCoord(int x, int y)
{
return(SquareRotateVector(x, y, rotation));
}
return(RotateInner(original, MapCoord, tileRotate));
}
public static ITopoArray <T> Rotate <T>(ITopoArray <T> original, Rotation rotation, TileRotate <T> tileRotate = null)
{
var type = original.Topology.Directions.Type;
if (type == DirectionSetType.Cartesian2d ||
type == DirectionSetType.Cartesian3d)
{
return(SquareRotate(original, rotation, tileRotate));
}
else if (type == DirectionSetType.Hexagonal2d)
{
return(HexRotate(original, rotation, tileRotate));
}
else
{
throw new Exception($"Unknown directions type {type}");
}
}