private RSide Step4GetOppositeForSide(RSide side)
{
switch (side)
{
case RSide.Front:
return(RSide.Back);
case RSide.Left:
return(RSide.Right);
case RSide.Right:
return(RSide.Left);
case RSide.Back:
return(RSide.Front);
case RSide.Down:
return(RSide.Up);
case RSide.Up:
return(RSide.Down);
default:
throw new ArgumentOutOfRangeException(nameof(side), side, "Wrong side passed");
}
}
public void RotateSide(RSide targetSide, bool clockwise = true)
{
var side = Sides[(sbyte)targetSide];
RotateSelectedSideFaces(side, clockwise);
RotateSelectedNeighbours(targetSide, side, clockwise);
}
private void Step3BuildCross()
{
//there could be only 4 possible configurations: empty, L, line and full cross
const RSide rMimic = RSide.Left;
const RSide uMimic = RSide.Down;
var correctFacesCount = 0;
var clrs = new[] { _dFaces[0, 1].Color, _dFaces[1, 0].Color, _dFaces[2, 1].Color, _dFaces[1, 2].Color };
void CrossBuildingCommandsSequence()
{
PerformRotation(RSide.Front, RotationType.Clockwise);
PerformRotation(rMimic, RotationType.Clockwise);
PerformRotation(uMimic, RotationType.Clockwise);
PerformRotation(rMimic, RotationType.CounterClockwise);
PerformRotation(uMimic, RotationType.CounterClockwise);
PerformRotation(RSide.Front, RotationType.CounterClockwise);
}
foreach (var color in clrs)
{
correctFacesCount = color == _dCenterColor ? correctFacesCount + 1 : correctFacesCount;
}
if (correctFacesCount == 0)
{
CrossBuildingCommandsSequence();
}
while (_dFaces[1, 0].Color == _dCenterColor || _dFaces[2, 1].Color != _dCenterColor)
{
PerformRotation(uMimic, RotationType.Clockwise);
}
while (!Step3CrossConditionsMet())
{
CrossBuildingCommandsSequence();
}
}
//for step4 points of interests are
/*
* [ ][ ][ ]
* [ ][ ][ ]
* [ ][ ][ ]
* [ ][ ][ ][ ][ ][ ][ ][ ][ ][ ][ ][ ]
* [ ][ ][ ][ ][ ][ ][ ][ ][ ][ ][ ][ ]
* [3][ ][0][0][ ][1][1][ ][2][2][ ][3]
* [0][ ][1]
* [ ][ ][ ]
* [3][ ][2]
*/
public void SolveStep4()
{
const RSide rMimic = RSide.Left;
const RSide dMimic = RSide.Up;
const RSide uMimic = RSide.Down;
var triplets = GetCurrentLowerTriplets();
var lastRotationsCount = _rotationsMade.Count;
if (!Step4TripletsAtCorrectCorners(triplets) && _rotationsMade.Count < 250)
{
var correctRightSide = Step4GetCorrectRightSide(ref triplets);
var correctLeftSide = Step4GetOppositeForSide(correctRightSide);
while (!Step4TripletsAtCorrectCorners(triplets))
{
Step4PerformCornersSwapAlgorithm(correctLeftSide, correctRightSide);
}
}
while (!Step4IsRubikComplete())
{
if (_dFaces[0, 0].Color == _dCenterColor)
{
PerformRotation(uMimic, RotationType.Clockwise);
}
else
{
PerformRotation(rMimic, RotationType.CounterClockwise);
PerformRotation(dMimic, RotationType.CounterClockwise);
PerformRotation(rMimic, RotationType.Clockwise);
PerformRotation(dMimic, RotationType.Clockwise);
}
}
if (_lFaces[0, 2].Color == _fCenterColor)
{
PerformRotation(uMimic, RotationType.Clockwise);
}
else if (_lFaces[0, 2].Color == _bCenterColor)
{
PerformRotation(uMimic, RotationType.CounterClockwise);
}
else if (_lFaces[0, 2].Color == _rCenterColor)
{
PerformRotation(uMimic, RotationType.Halfturn);
}
if (_lFaces[1, 2].Color != _lCenterColor)
{
return;
}
RotationsCountStep4 = _rotationsMade.Count - lastRotationsCount;
}
private void Step2PerformRightAlgorithm(RSide frontMimic, RSide rightMimic)
{
// U R U' R' U' F' U F
//instead of up we use down because we do not turn rubik upside down programmatically
PerformRotation(RSide.Down, RotationType.Clockwise);
PerformRotation(rightMimic, RotationType.Clockwise);
PerformRotation(RSide.Down, RotationType.CounterClockwise);
PerformRotation(rightMimic, RotationType.CounterClockwise);
PerformRotation(RSide.Down, RotationType.CounterClockwise);
PerformRotation(frontMimic, RotationType.CounterClockwise);
PerformRotation(RSide.Down, RotationType.Clockwise);
PerformRotation(frontMimic, RotationType.Clockwise);
}
private void Step2PerformLeftAlgorithm(RSide frontMimic, RSide leftMimic)
{
// U' L' U L U F U' F'
//instead of up we use down because we do not turn rubik upside down programmatically
PerformRotation(RSide.Down, RotationType.CounterClockwise);
PerformRotation(leftMimic, RotationType.CounterClockwise);
PerformRotation(RSide.Down, RotationType.Clockwise);
PerformRotation(leftMimic, RotationType.Clockwise);
PerformRotation(RSide.Down, RotationType.Clockwise);
PerformRotation(frontMimic, RotationType.Clockwise);
PerformRotation(RSide.Down, RotationType.CounterClockwise);
PerformRotation(frontMimic, RotationType.CounterClockwise);
}
private void Step3PerformPairsSwap(RSide rMimic)
{
// R U R' U R U2 R' U
// instead of up we are using down, because we won't turn rubik upside down programmatically
const RSide uMimic = RSide.Down;
PerformRotation(rMimic, RotationType.Clockwise);
PerformRotation(uMimic, RotationType.Clockwise);
PerformRotation(rMimic, RotationType.CounterClockwise);
PerformRotation(uMimic, RotationType.Clockwise);
PerformRotation(rMimic, RotationType.Clockwise);
PerformRotation(uMimic, RotationType.Halfturn);
PerformRotation(rMimic, RotationType.CounterClockwise);
PerformRotation(uMimic, RotationType.Clockwise);
}
private void Step4PerformCornersSwapAlgorithm(RSide lMimic, RSide rMimic)
{
// U R U' L' U R' U' L
// instead of up we are using down, because we won't turn rubik upside down programmatically
var uMimic = RSide.Down;
PerformRotation(uMimic, RotationType.Clockwise);
PerformRotation(rMimic, RotationType.Clockwise);
PerformRotation(uMimic, RotationType.CounterClockwise);
PerformRotation(lMimic, RotationType.CounterClockwise);
PerformRotation(uMimic, RotationType.Clockwise);
PerformRotation(rMimic, RotationType.CounterClockwise);
PerformRotation(uMimic, RotationType.CounterClockwise);
PerformRotation(lMimic, RotationType.Clockwise);
}
private void Step0SwapNearPairsParts(RSide side0, RSide side1)
{
//swaps upper edges parts (if they are neighbours) without cross breaking
if (side0 == RSide.Left && side1 == RSide.Front)
{
PerformRotation(RSide.Front, RotationType.CounterClockwise);
PerformRotation(RSide.Up, RotationType.CounterClockwise);
PerformRotation(RSide.Front, RotationType.Clockwise);
PerformRotation(RSide.Up, RotationType.Clockwise);
PerformRotation(RSide.Front, RotationType.CounterClockwise);
}
else if (side0 == RSide.Front && side1 == RSide.Right)
{
PerformRotation(RSide.Right, RotationType.CounterClockwise);
PerformRotation(RSide.Up, RotationType.CounterClockwise);
PerformRotation(RSide.Right, RotationType.Clockwise);
PerformRotation(RSide.Up, RotationType.Clockwise);
PerformRotation(RSide.Right, RotationType.CounterClockwise);
}
else if (side0 == RSide.Right && side1 == RSide.Back)
{
PerformRotation(RSide.Back, RotationType.CounterClockwise);
PerformRotation(RSide.Up, RotationType.CounterClockwise);
PerformRotation(RSide.Back, RotationType.Clockwise);
PerformRotation(RSide.Up, RotationType.Clockwise);
PerformRotation(RSide.Back, RotationType.CounterClockwise);
}
else if (side0 == RSide.Back && side1 == RSide.Left)
{
PerformRotation(RSide.Left, RotationType.CounterClockwise);
PerformRotation(RSide.Up, RotationType.CounterClockwise);
PerformRotation(RSide.Left, RotationType.Clockwise);
PerformRotation(RSide.Up, RotationType.Clockwise);
PerformRotation(RSide.Left, RotationType.CounterClockwise);
}
}