public void MoveRover(MarsRoverContext marsRoverContext, Planet planet)
{
// Note that I am mutating properties directly from the given arguments. It is better to avoid this because,
// if for any reason the compiler decides to pas it by value instead of by ref, the method will not behave as expected.
// Also I am aware of the ref keyword but still, the C# compiler should pass these objects by ref as default.
int planetXAxis = planet.Size.GetLength(0);
int planetYAxis = planet.Size.GetLength(1);
Point currentPoint = marsRoverContext.MarsRover.Location;
int currentX = marsRoverContext.MarsRover.Location.X;
int currentY = marsRoverContext.MarsRover.Location.Y;
int newX = 0, newY = 0;
CardinalDirection cardinalDirectionRover = marsRoverContext.MarsRover.FacingDirection;
// North move will cause +1 on the Y-axis
// East move will cause a +1 on the X-axis
// South move will cause a -1 on the Y-axis
// West move will cause a -1 on the X-axis
switch (cardinalDirectionRover)
{
case CardinalDirection.North:
newX = currentX;
newY = currentY + 1;
break;
case CardinalDirection.East:
newX = currentX + 1;
newY = currentY;
break;
case CardinalDirection.South:
newX = currentX;
newY = currentY - 1;
break;
case CardinalDirection.West:
newX = currentX - 1;
newY = currentY;
break;
}
if (newY >= planetYAxis || newX >= planetXAxis || newY < 0 || newX < 0)
{
Console.WriteLine("The Mars rover is now out of the grid");
marsRoverContext.SetState(new StuckState());
return;
}
Point newMarsRoverLocation = new Point(newX, newY);
// For collision later
planet.RemoveObject(currentPoint);
planet.PlaceObject(newMarsRoverLocation);
marsRoverContext.MarsRover.SetNewLocation(newMarsRoverLocation);
Console.WriteLine($"The Mars rover moved to X {newX} and Y {newY}");
}
public void MoveRover(MarsRover marsRover, Move marsRoverMove)
{
MarsRoverContext marsRoverResult = MarsRovers.Find(rover => rover.MarsRover.Equals(marsRover));
if (marsRoverResult == null)
{
throw new Exception("Mars rover not found.");
}
marsRoverResult.MoveRover(marsRoverMove, this);
}
public void MoveRover(MarsRoverContext context, Planet planet)
{
Console.WriteLine("The Mars rover is stuck. Please contact a mechanic.");
}
