private IBasicPolygon GetCell(Point3d coordinates)
{
return Game.Board.Cells.Where(c => c.Coordintes.X == coordinates.X &&
c.Coordintes.Y == coordinates.Y &&
c.Coordintes.Z == coordinates.Z)
.FirstOrDefault();
}
private void CheckCellExists(Point3d coordinates)
{
var cell = GetCell(coordinates);
if (cell == null)
{
throw new InvalidOperationException("Cell with coordinates {coordinates} not found.");
}
}
private IBasicPolygon GetMiddleCell(Point3d from, Point3d to)
{
return GetCell(new Point3d() { X = (from.X + to.X) / 2, Y = (from.Y + to.Y) / 2, Z = (from.Z + to.Z) / 2 });
}
private void CheckMoveCoordiantes(Point3d from, Point3d to)
{
CheckCellExists(from);
CheckCellExists(to);
CheckTargetCellIsSolid(to);
CheckCoordiantes(from, to);
CheckMoveState(from, to);
}
private void CheckMoveState(Point3d from, Point3d to)
{
var cellFrom = GetCell(from);
var cellTo = GetCell(to);
var middleCell = GetMiddleCell(from, to);
if (middleCell == null ||
middleCell.State != PolygonState.Filled ||
cellFrom.State != PolygonState.Filled ||
cellTo.State != PolygonState.Empty)
{
throw new InvalidOperationException(string.Format("Can't move from {0}.", from));
}
}
private void CheckCoordiantes(Point3d from, Point3d to)
{
var xDiff = Math.Abs(from.X - to.X);
var yDiff = Math.Abs(from.Y - to.Y);
if ((xDiff == 2 && yDiff == 0) || (yDiff == 2 && xDiff == 0))
{
return;
}
else
{
throw new InvalidOperationException(string.Format("Can't move {0} -> {1}.", from, to));
}
}
private void CheckTargetCellIsSolid(Point3d coordinates)
{
var cell = GetCell(coordinates);
if (cell.State == PolygonState.Solid)
{
throw new InvalidOperationException(string.Format("Cell with coordinates {0} is solid.", coordinates));
}
}