/// <summary>
/// private mid layer constructor
/// </summary>
/// <param name="FaceArray">Face array</param>
/// <param name="FaceNo">Face number</param>
private MidLayer
(
int[] FaceArray,
int FaceNo
)
{
// save face number and position
// 11=Blue, 19=Red, 27=Green, 35=Orange
this.FaceNo = FaceNo;
FacePos = Cube.FindEdge(FaceArray, FaceNo);
// mid layer edge is in the mid layer but in wrong position or orientation
if (Cube.FaceNoToBlockNo[FacePos] < 18)
{
MoveToYellow = true;
return;
}
// color of face no
int FaceNoColor = FaceNo / Cube.FaceNoToColor;
// use left algorithm
if (FacePos / Cube.FaceNoToColor == Cube.YellowFace)
{
// the front face is one face to the right
FrontFace = (FaceNoColor % 4) + 1;
// steps control
StepCtrl = Cube.MidLayerLeft;
// get steps
Steps = StepCtrl.Steps(FrontFace - 1);
// face pos is on yellow face
// it is translated to face position on a front face
// and converted to color code
Rotation = (33 - 4 * (FacePos - 41)) / 8 - FrontFace + 4;
}
// use right algorithm
else
{
// front face
FrontFace = FaceNoColor;
// steps control
StepCtrl = Cube.MidLayerRight;
// get steps
Steps = StepCtrl.Steps(FaceNoColor - 1);
// required rotation
Rotation = FacePos / 8 - FaceNoColor + 4;
}
// the first step in mid layer algorithm is yellow rotation
// if additional yellow rotation is required we will combine it with first step
YellowRotation = (Steps[0] - Cube.YellowCW + 1 + Rotation) % 4;
return;
}
/// <summary>
/// Create solution state case 4
/// </summary>
/// <param name="Message">Message</param>
/// <returns>Solution step</returns>
public SolutionStep CreateSolutionStep4
(
string Message
)
{
// current face position is in middle layer but not at right place.
// we need to take it out to yellow layer
// we will do right algoritm
switch (FacePos)
{
case 11:
case 23:
FrontFace = 1;
break;
case 19:
case 31:
FrontFace = 2;
break;
case 27:
case 39:
FrontFace = 3;
break;
case 35:
case 15:
FrontFace = 4;
break;
default:
throw new ApplicationException("Mid layer FacePos");
}
// get mid layer right step control
StepCtrl = Cube.MidLayerRight;
// get steps
Steps = StepCtrl.Steps(FrontFace - 1);
// remove initial step
int Len = Steps.Length - 1;
int[] TempSteps = new int[Len];
Array.Copy(Steps, 1, TempSteps, 0, Len);
// there was no yellow rotation required
return(new SolutionStep(StepCode.MidLayer, Message, FacePos, Cube.YellowFace, FrontFace, TempSteps));
}
/// <summary>
/// Create solution step
/// </summary>
/// <param name="Message">Text message</param>
/// <returns>Solution step</returns>
public SolutionStep CreateSolutionStep
(
string Message
)
{
// if block number is 0 to 8 it is in white face but not in correct position
// we need an extra move to get it out of white face into yellow face
if (MoveToYellow)
{
// calculate face position on the yellow face that will be moved
// into the bad corner block to force it to get out
FacePos = 0;
switch (FaceNo)
{
case 0:
FacePos = 16;
break;
case 2:
FacePos = 24;
break;
case 4:
FacePos = 32;
break;
case 6:
FacePos = 8;
break;
}
}
// if rotation is not zero change face position
else if (YellowRotation != 0)
{
FacePos = Cube.RotMatrix[Cube.YellowCW + YellowRotation - 1][FacePos];
}
// get steps
int CtrlIndex = Cube.WhiteCornerIndex[FacePos / 2];
int Case = CtrlIndex / 4;
int StepsIndex = CtrlIndex % 4;
int FrontFace = StepsIndex + 1;
StepCtrl StepCtrl = Cube.WhiteCornerCases[Case];
int[] Steps = StepCtrl.Steps(StepsIndex);
// corner is in yellow face
if (!MoveToYellow)
{
// no rotation
if (YellowRotation == 0)
{
return(new SolutionStep(StepCode.WhiteCorners, Message, FaceNo, Cube.WhiteFace, FrontFace, Steps));
}
// create new color steps array to include yellow rotation
int Len = Steps.Length;
int[] TempSteps = new int[Len + 1];
Array.Copy(Steps, 0, TempSteps, 1, Len);
TempSteps[0] = Cube.YellowCW + YellowRotation - 1;
// return solve step
return(new SolutionStep(StepCode.WhiteCorners, Message, FaceNo, Cube.WhiteFace, FrontFace, TempSteps));
}
// move corner to yellow face
// return with solve step
return(new SolutionStep(StepCode.WhiteCorners, Message, FaceNo, Cube.WhiteFace, FrontFace, Steps));
}