public void RotateAround(FerryDir whereDir, int degrees)
{
Console.WriteLine($"Rotate {ToString()} to {whereDir} by {degrees}");
var value = (int)(degrees / 90.0); //1, 2, 3
if (whereDir == FerryDir.L)
{
value *= -1;
}
if (value < 0)
{
value += 4;
}
value %= 4;
Console.WriteLine($"val {value}");
switch (value)
{
case 1: //90
(x, y) = (y, -x);
break;
case 2: //180
(x, y) = (-x, -y);
break;
case 3: //270
(x, y) = (-y, x);
break;
}
Console.WriteLine($"rotated {ToString()}");
}
static FerryDir Rotate(FerryDir currentDir, FerryDir whereDir, int degrees)
{
Console.WriteLine($"Rotate current: {currentDir} where: {whereDir} by: {degrees}");
var stuff = new List <(FerryDir, int)> {
(FerryDir.N, 0),
(FerryDir.E, 1),
(FerryDir.S, 2),
(FerryDir.W, 3)
};
var current = stuff.Single(s => s.Item1 == currentDir).Item2;
var value = (int)(degrees / 90.0);
if (whereDir == FerryDir.L)
{
value *= -1;
}
Console.WriteLine($"current val: {current} to val: {value}");
current = (current + value) % 4;
if (current < 0)
{
current += 4;
}
Console.WriteLine($"after turn val: {current}");
return(stuff.Single(s => s.Item2 == current).Item1);
}
public void MoveByCardinal(FerryDir dir, int dist)
{
switch (dir)
{
case FerryDir.N:
y += dist;
break;
case FerryDir.E:
x += dist;
break;
case FerryDir.S:
y -= dist;
break;
case FerryDir.W:
x -= dist;
break;
default:
Console.WriteLine("Not a cardinal line!");
break;
}
}
