public static ImmutableArray <ushort> Create()
{
var udEdgesConj = new ushort[NUdEdges * NSymD4H];
for (var t = 0; t < 0 + NUdEdges; t++)
{
if ((t + 1) % 400 == 0)
{
Console.Write(".");
}
if ((t + 1) % 32000 == 0)
{
Console.WriteLine("");
}
var cc = SolvedCube.Instance.Clone();
cc.set_ud_edges(t);
for (var s = 0; s < 0 + NSymD4H; s++)
{
var ss = Basic.Cubes[s].Clone();
ss.EdgeMultiply(cc);
ss.EdgeMultiply(Inverse.GetCube(s));
udEdgesConj[NSymD4H * t + s] = Convert.ToUInt16(ss.get_ud_edges()); //TODO remove all these
}
}
return(udEdgesConj.ToImmutableArray());
}
public void InversesShouldMultiplyToSolvedCube(int i)
{
var sym = Basic.Cubes[i].Clone();
var inv = Inverse.GetCube(i);
sym.Multiply(inv);
sym.Should().Be(SolvedCube.Instance);
}
/// <summary>
/// Get the symmetries and antisymmetries of the cube
/// </summary>
public static IEnumerable <int> Symmetries(this ICubieCube cubieCube)
{
for (var j = 0; j < Definitions.NSym; j++)
{
var c = Basic.Cubes[j].Clone();
c.Multiply(cubieCube);
c.Multiply(Inverse.GetCube(j));
if (CubeComparer.Instance.Equals(cubieCube, c))
{
yield return(j);
}
var d = c.Invert();
if (CubeComparer.Instance.Equals(cubieCube, d))
{
yield return(j + Definitions.NSym);
}
}
}
/// <summary>
/// Creates the new table in memory
/// </summary>
/// <returns></returns>
public override uint[] Create()
{
const int total = NCornersClass * NUdEdges;
var table = new uint[total / 16];
Array.Fill(table, uint.MaxValue);
// ##################### create table with the symmetries of the corners classes ################################
var cc = SolvedCube.Instance.Clone();
var cSym = new ushort[NCornersClass];
for (var i = 0; i < 0 + NCornersClass; i++)
{
if ((i + 1) % 1000 == 0)
{
Console.Write(".");
}
var rep = CornerSymmetries.CornerRep[i];
cc.set_corners(rep);
for (byte s = 0; s < NSymD4H; s++)
{
var ss = Basic.Cubes[s].Clone();
ss.CornerMultiply(cc);
ss.CornerMultiply(Inverse.GetCube(s));
if (ss.get_corners() == rep)
{
const ushort u = 1;
var q = Convert.ToUInt16(u << s);
cSym[i] |= q;
}
}
}
Console.WriteLine();
//###############################################################################################################
var udEdge = 0;
set_corners_ud_edges_depth3(NUdEdges * 0 + udEdge, 0, table);
var done = 1;
uint depth = 0;
Console.WriteLine($"depth: {depth} done: {done}/{total}");
while (depth < 10)
{
// we fill the table only do depth 9 + 1
var depth3 = depth % 3;
var idx = 0;
var mult = 2;
if (depth > 9)
{
mult = 1;
}
for (var cClassIndex = 0; cClassIndex < NCornersClass; cClassIndex++)
{
{
if ((cClassIndex + 1) % (20 * mult) == 0)
{
Console.Write(".");
}
if ((cClassIndex + 1) % (1600 * mult) == 0)
{
Console.WriteLine("");
}
udEdge = 0;
while (udEdge < NUdEdges)
{
// ################ if table entries are not populated, this is very fast: ##########################
if (idx % 16 == 0 && table[idx / 16] == uint.MaxValue && udEdge < NUdEdges - 16)
{
udEdge += 16;
idx += 16;
continue;
}
//###################################################################################################
if (get_corners_ud_edges_depth3(idx, table) == depth3)
{
var corner = CornerSymmetries.CornerRep[cClassIndex];
// only iterate phase 2 SpecialMoves
foreach (var m in Phase2MoveEnums)
{
var udEdge1 = SpecialMoves.UdEdgesMove[18 * udEdge + (int)m];
var corner1 = SpecialMoves.CornersMove[18 * corner + (int)m];
var c1ClassIndex = CornerSymmetries.CornerClassidx[corner1];
var c1Sym = CornerSymmetries.CornerSym[corner1];
udEdge1 = UdEdges.GetUdEdgesConj(udEdge1, c1Sym);// Symmetries.UdEdgesConjugation.UdEdgesConj[(udEdge1 << 4) + c1Sym];
var idx1 = 40320 * c1ClassIndex + udEdge1;
if (get_corners_ud_edges_depth3(idx1, table) == 3)
{
// entry not yet filled
set_corners_ud_edges_depth3(idx1, (depth + 1) % 3, table);
done += 1;
// ######symmetric position has eventually more than one representation #############
var sym = cSym[c1ClassIndex];
if (sym != 1)
{
for (byte j = 1; j < 16; j++)
{
sym >>= 1;
if (sym % 2 == 1)
{
var udEdge2 = UdEdges.GetUdEdgesConj(udEdge1, j);
// c1_classidx does not change
var idx2 = 40320 * c1ClassIndex + udEdge2;
if (get_corners_ud_edges_depth3(idx2, table) == 3)
{
set_corners_ud_edges_depth3(idx2, (depth + 1) % 3, table);
done += 1;
//###################################################################################
}
}
}
}
}
}
}
udEdge += 1;
idx += 1;
}
}
}
depth += 1;
Console.WriteLine();
Console.WriteLine($"depth: {depth} done: {done}/{total}");
}
return(table);
}
public override uint[] Create()
{
const int total = NFlipsliceClass * NTwist;
var table = new uint[total / 16 + 1];
Array.Fill(table, uint.MaxValue);
// #################### create table with the symmetries of the flipslice classes ###############################
var cc = SolvedCube.Instance.Clone();
var fsSym = new int[NFlipsliceClass];
for (var i = 0; i < NFlipsliceClass; i++)
{
if ((i + 1) % 1000 == 0)
{
Console.Write(".");
}
var rep = FlipSlice.FlipsliceRep[i];
var repModFlip = Convert.ToInt32(rep % NFlip);
cc.set_slice(Convert.ToUInt16(rep / NFlip));
cc.set_flip(repModFlip);
for (var s = 0; s < NSymD4H; s++)
{
var ss = Basic.Cubes[s].Clone();
ss.EdgeMultiply(cc);
ss.EdgeMultiply(Inverse.GetCube(s));
if (ss.get_slice() == rep / NFlip && ss.get_flip() == repModFlip)
{
fsSym[i] |= 1 << s;
}
}
}
Console.WriteLine();
// ##################################################################################################################
var twist = 0;
set_flipslice_twist_depth3(NTwist * 0 + twist, 0, table);
var done = 1;
uint depth = 0;
var backSearch = false;
Console.WriteLine($"depth: {depth} done: {done}/{total}");
while (done < total)
{
var depth3 = depth % 3;
if (depth == 9)
{
// backwards search is faster for depth >= 9
Console.WriteLine("flipping to backwards search...");
backSearch = true;
}
var mult = depth < 8 ? 5 : 1;
var idx = 0;
for (var fsClassidx = 0; fsClassidx < NFlipsliceClass; fsClassidx++)
{
if ((fsClassidx + 1) % (200 * mult) == 0)
{
Console.Write(".");
}
if ((fsClassidx + 1) % (16000 * mult) == 0)
{
Console.WriteLine("");
}
twist = 0;
while (twist < NTwist)
{
// ########## if table entries are not populated, this is very fast: ################################
if (!backSearch && idx % 16 == 0 && table[idx / 16] == uint.MaxValue &&
twist < NTwist - 16)
{
twist += 16;
idx += 16;
continue;
}
//###################################################################################################
bool match;
if (backSearch)
{
match = get_flipslice_twist_depth3(idx, table) == 3;
}
else
{
match = get_flipslice_twist_depth3(idx, table) == depth3;
}
if (match)
{
var flipslice = FlipSlice.FlipsliceRep[fsClassidx];
var flip = Convert.ToInt32(flipslice % 2048);
var slice = Convert.ToInt32(flipslice >> 11);
foreach (var m in Extensions.GetEnumValues <Move>())
{
var twist1 = SpecialMoves.TwistMove[18 * twist + (int)m];
var flip1 = SpecialMoves.FlipMove[18 * flip + (int)m];
var slice1 = SpecialMoves.SliceSortedMove[432 * slice + (int)m] / 24;
var flipslice1 = (slice1 << 11) + flip1;
var fs1Classidx = FlipSlice.FlipsliceClassidx[flipslice1];
var fs1Sym = FlipSlice.FlipsliceSym[flipslice1];
twist1 = ConjTwist.GetTwistConj(twist1, fs1Sym);
var idx1 = Convert.ToInt32(2187 * fs1Classidx + twist1);
if (!backSearch)
{
if (get_flipslice_twist_depth3(idx1, table) == 3)
{
// entry not yet filled
set_flipslice_twist_depth3(idx1, (depth + 1) % 3, table);
done += 1;
// ####symmetric position has eventually more than one representation ###############
var sym = fsSym[fs1Classidx];
if (sym != 1)
{
for (byte j = 1; j < 16; j++)
{
sym >>= 1;
if (sym % 2 == 1)
{
var twist2 = ConjTwist.GetTwistConj(twist1, j);
// fs2_classidx = fs1_classidx due to symmetry
var idx2 = Convert.ToInt32(2187 * fs1Classidx + twist2);
if (get_flipslice_twist_depth3(idx2, table) == 3)
{
set_flipslice_twist_depth3(idx2, (depth + 1) % 3, table);
done += 1;
}
}
}
}
}
}
else
{
// backwards search
if (get_flipslice_twist_depth3(idx1, table) == depth3)
{
set_flipslice_twist_depth3(idx, (depth + 1) % 3, table);
done += 1; //this doesn't seem to be working
break;
}
}
}
}
twist += 1;
idx += 1;
}
}
depth += 1;
Console.WriteLine();
Console.WriteLine($"depth: {depth} done: {done}/{total}");
}
return(table);
}