/// <summary>
/// Calculates one of the surface distances (not the necessarily the shortest one) for 2 points on opposing cube faces.
/// </summary>
private static int CalculateDistanceOnExtendedGrid(ExtendedGrid extendedGrid, GridPoint startPoint, GridPoint endPoint)
{
GridPoint start = new GridPoint(startPoint.face, startPoint.x, startPoint.y);
GridPoint end = new GridPoint(endPoint.face, endPoint.x, endPoint.y);
switch (extendedGrid)
{
case ExtendedGrid.TopLeft:
end.MirrorGridHorizontal();
end.RotateGrid90CW();
start.x += gridSize;
end.y += (gridSize * 2);
break;
case ExtendedGrid.TopMiddle:
end.MirrorGridVertical();
end.y += (gridSize * 2);
break;
case ExtendedGrid.TopRight:
end.MirrorGridVertical();
end.RotateGrid90CW();
end.x += gridSize;
end.y += (gridSize * 2);
break;
case ExtendedGrid.RightTop:
end.MirrorGridVertical();
end.RotateGrid90CW();
end.x += (gridSize * 2);
end.y += gridSize;
break;
case ExtendedGrid.RightMiddle:
end.MirrorGridHorizontal();
end.x += (gridSize * 2);
break;
case ExtendedGrid.RightBot:
end.MirrorGridHorizontal();
end.RotateGrid90CW();
start.y += gridSize;
end.x += gridSize * 2;
break;
case ExtendedGrid.BotRight:
end.MirrorGridHorizontal();
end.RotateGrid90CW();
start.y += gridSize * 2;
end.x += gridSize;
break;
case ExtendedGrid.BotMiddle:
end.MirrorGridVertical();
start.y += (gridSize * 2);
break;
case ExtendedGrid.BotLeft:
end.MirrorGridVertical();
end.RotateGrid90CW();
start.x += gridSize;
start.y += gridSize * 2;
break;
case ExtendedGrid.LeftBot:
end.MirrorGridVertical();
end.RotateGrid90CW();
start.y += gridSize;
start.x += (gridSize * 2);
break;
case ExtendedGrid.LeftMiddle:
end.MirrorGridHorizontal();
start.x += gridSize * 2;
break;
case ExtendedGrid.LeftTop:
end.MirrorGridHorizontal();
end.RotateGrid90CW();
start.x += gridSize * 2;
end.y += gridSize;
break;
default:
throw new Exception("huh?");
}
return(CalculateShortestDistance(start, end));
}