public void ExecuteInstructions(ShipPart2 ship)
{
switch (instr)
{
case Instruction.North:
ship.waypointPosition += new LongPoint2D(0, quantity);
break;
case Instruction.South:
ship.waypointPosition += new LongPoint2D(0, -quantity);
break;
case Instruction.East:
ship.waypointPosition += new LongPoint2D(quantity, 0);
break;
case Instruction.West:
ship.waypointPosition += new LongPoint2D(-quantity, 0);
break;
case Instruction.Left:
case Instruction.Right:
ship.waypointPosition = Rotate(ship.waypointPosition, instr, quantity);
break;
case Instruction.Forward:
ship.position += quantity * ship.waypointPosition;
break;
default: throw new Exception();
}
}
static void Main(string[] args)
{
Console.WriteLine("Day 12 - Rain Risk");
Console.WriteLine("Star 1");
Console.WriteLine();
List <Navigation> instructions = File.ReadAllLines(inputFile)
.Select(x => new Navigation(x))
.ToList();
Ship ship = new Ship();
ShipPart2 shipPart2 = new ShipPart2();
foreach (Navigation navigation in instructions)
{
navigation.ExecuteInstructions(ship);
navigation.ExecuteInstructions(shipPart2);
}
int output1 = Math.Abs(ship.position.x) + Math.Abs(ship.position.y);
Console.WriteLine($"The answer is: {output1}");
Console.WriteLine();
Console.WriteLine("Star 2");
Console.WriteLine();
long output2 = Math.Abs(shipPart2.position.x) + Math.Abs(shipPart2.position.y);
Console.WriteLine($"The answer is: {output2}");
Console.WriteLine();
Console.ReadKey();
}
public static void Main(string[] args)
{
var instructions = InputReader.ReadInput(
"input.txt",
s => new Instruction(s.First(), int.Parse(s.Substring(1))));
var timer = new Stopwatch();
timer.Start();
var ship = new Ship();
foreach (var instruction in instructions)
{
ship.Execute(instruction);
}
timer.Stop();
Console.WriteLine($"Part1: {ship.ManhattanDistance}");
Console.WriteLine($"Timer: {timer.Elapsed}");
timer.Restart();
var shipPart2 = new ShipPart2();
var waypoint = new Waypoint(shipPart2);
foreach (var instruction in instructions)
{
ExecutePart2Instruction(instruction, waypoint, shipPart2);
}
timer.Stop();
Console.WriteLine($"Part2: {shipPart2.ManhattanDistance}");
Console.WriteLine($"Timer: {timer.Elapsed}");
}
public static long Part2(string input)
{
if (input == null)
{
throw new ArgumentNullException(nameof(input));
}
var ship = new ShipPart2();
ship.ProcessInput(input);
return(ship.Distance);
}
private static void ExecutePart2Instruction(Instruction instruction, Waypoint waypoint, ShipPart2 shipPart2)
{
switch (instruction.Operation)
{
case 'N':
waypoint.NorthPosition += instruction.Amount;
break;
case 'E':
waypoint.EastPosition += instruction.Amount;
break;
case 'S':
waypoint.NorthPosition -= instruction.Amount;
break;
case 'W':
waypoint.EastPosition -= instruction.Amount;
break;
case 'L':
case 'R':
waypoint.Rotate(instruction.Operation, instruction.Amount);
break;
case 'F':
shipPart2.EastPosition += waypoint.EastPosition * instruction.Amount;
shipPart2.NorthPosition += waypoint.NorthPosition * instruction.Amount;
break;
}
}
