public static void MirrorZ(CopyState state, BlockDefinition[] defs)
{
int midZ = (state.Length + 1) / 2, maxZ = state.Length - 1;
state.OriginZ = state.OppositeOriginZ;
state.Offset.Z = -state.Offset.Z;
BlockID[] transform = Transform(defs, mirrorZ, null);
for (int y = 0; y < state.Height; y++)
{
for (int z = 0; z < midZ; z++)
{
int endZ = maxZ - z;
int beg = state.GetIndex(0, y, z);
int end = state.GetIndex(0, y, endZ);
for (int x = 0; x < state.Width; x++)
{
BlockID blockA = transform[state.Get(beg)];
BlockID blockB = transform[state.Get(end)];
state.Set(blockB, beg); state.Set(blockA, end);
beg++; end++;
}
}
}
}
public static void MirrorY(CopyState state, BlockDefinition[] defs)
{
int midY = (state.Height + 1) / 2, maxY = state.Height - 1;
state.OriginY = state.OppositeOriginY;
state.Offset.Y = -state.Offset.Y;
BlockID[] transform = Transform(defs, mirrorY, null);
for (int y = 0; y < midY; y++)
{
int endY = maxY - y;
int beg = state.GetIndex(0, y, 0);
int end = state.GetIndex(0, endY, 0);
for (int z = 0; z < state.Length; z++)
{
for (int x = 0; x < state.Width; x++)
{
BlockID blockA = transform[state.Get(beg)];
BlockID blockB = transform[state.Get(end)];
state.Set(blockB, beg); state.Set(blockA, end);
beg++; end++;
}
}
}
}
public static void MirrorX(CopyState state, BlockDefinition[] defs)
{
// ceiling division by 2, because for odd length, we still want to
// mirror the middle row to rotate directional blocks
int midX = (state.Width + 1) / 2, maxX = state.Width - 1;
state.OriginX = state.OppositeOriginX;
state.Offset.X = -state.Offset.X;
BlockID[] transform = Transform(defs, mirrorX, null);
for (int y = 0; y < state.Height; y++)
{
for (int z = 0; z < state.Length; z++)
{
for (int x = 0; x < midX; x++)
{
int endX = maxX - x;
int beg = state.GetIndex(x, y, z);
int end = state.GetIndex(endX, y, z);
BlockID blockA = transform[state.Get(beg)];
BlockID blockB = transform[state.Get(end)];
state.Set(blockB, beg); state.Set(blockA, end);
}
}
}
}
public static void MirrorZ(CopyState state, BlockDefinition[] defs)
{
int midX = (state.Width + 1) / 2, maxX = state.Width - 1;
state.OriginX = state.OppositeOriginX;
state.Offset.X = -state.Offset.X;
BlockID[] transform = Transform(defs, mirrorZ, null);
for (int y = 0; y < state.Height; y++)
{
for (int z = 0; z < state.Length; z++)
{
for (int x = 0; x < midX; x++)
{
int endX = maxX - x;
int start = state.GetIndex(x, y, z);
int end = state.GetIndex(endX, y, z);
BlockID blockA = transform[state.Get(start)];
BlockID blockB = transform[state.Get(end)];
state.Set(blockB, start); state.Set(blockA, end);
}
}
}
}
public static void MirrorX(CopyState state, BlockDefinition[] defs)
{
// ceiling division by 2, because for odd length, we still want to
// mirror the middle row to rotate directional blocks
int midZ = (state.Length + 1) / 2, maxZ = state.Length - 1;
state.OriginZ = state.OppositeOriginZ;
state.Offset.Z = -state.Offset.Z;
BlockID[] transform = Transform(defs, mirrorX, null);
for (int y = 0; y < state.Height; y++)
{
for (int z = 0; z < midZ; z++)
{
int endZ = maxZ - z;
int start = state.GetIndex(0, y, z);
int end = state.GetIndex(0, y, endZ);
for (int x = 0; x < state.Width; x++)
{
BlockID blockA = transform[state.Get(start)];
BlockID blockB = transform[state.Get(end)];
state.Set(blockB, start); state.Set(blockA, end);
start++; end++;
}
}
}
}
static CopyState Rotate(CopyState state, CopyState flipped, int[] m, BlockID[] transform)
{
int volume = state.Volume;
for (int i = 0; i < volume; i++)
{
ushort x, y, z;
state.GetCoords(i, out x, out y, out z);
BlockID block = transform[state.Get(i)];
flipped.Set(block,
Rotate(m[0], x, y, z, state),
Rotate(m[1], x, y, z, state),
Rotate(m[2], x, y, z, state));
}
int oX = state.OriginX - state.X, oY = state.OriginY - state.Y, oZ = state.OriginZ - state.Z;
flipped.OriginX = state.X + Rotate(m[0], oX, oY, oZ, state);
flipped.OriginY = state.Y + Rotate(m[1], oX, oY, oZ, state);
flipped.OriginZ = state.Z + Rotate(m[2], oX, oY, oZ, state);
// Offset is relative to Origin
oX += state.Offset.X; oY += state.Offset.Y; oZ += state.Offset.Z;
flipped.Offset.X = state.X + Rotate(m[0], oX, oY, oZ, state) - flipped.OriginX;
flipped.Offset.Y = state.Y + Rotate(m[1], oX, oY, oZ, state) - flipped.OriginY;
flipped.Offset.Z = state.Z + Rotate(m[2], oX, oY, oZ, state) - flipped.OriginZ;
return(flipped);
}