static void Part1(string[] input)
{
string wire1 = input[1];
var wire1instructions = wire1.Split(",").Select(x => new Instruction(x));
LineSet wire1path = GetLines(wire1instructions);
string wire2 = input[0];
var wire2instructions = wire2.Split(",").Select(x => new Instruction(x));
LineSet wire2path = GetLines(wire2instructions);
var intersects1 = GetIntersections(wire1path.Horizontals.Cast <LineBase>().ToList(), wire2path.Verticals.Cast <LineBase>().ToList());
var intersects2 = GetIntersections(wire1path.Verticals.Cast <LineBase>().ToList(), wire2path.Horizontals.Cast <LineBase>().ToList());
int minDistance1 = (from item in intersects1
select Math.Abs(item.coordinate.x) + Math.Abs(item.coordinate.y)).Min();
int minDistance2 = (from item in intersects2
select Math.Abs(item.coordinate.x) + Math.Abs(item.coordinate.y)).Min();
Console.WriteLine(minDistance1);
Console.WriteLine(minDistance2);
}
static void Part2(string[] input)
{
string wire1 = input[1];
var wire1instructions = wire1.Split(",").Select(x => new Instruction(x));
LineSet wire1path = GetLines(wire1instructions);
string wire2 = input[0];
var wire2instructions = wire2.Split(",").Select(x => new Instruction(x));
LineSet wire2path = GetLines(wire2instructions);
var intersects1 = GetIntersections(wire1path.Horizontals.Cast <LineBase>().ToList(), wire2path.Verticals.Cast <LineBase>().ToList());
var intersects2 = GetIntersections(wire1path.Verticals.Cast <LineBase>().ToList(), wire2path.Horizontals.Cast <LineBase>().ToList());
var allIntersects = intersects1.Concat(intersects2);
List <int> wireDistances = new List <int>();
foreach (Intersect intersect in allIntersects)
{
wireDistances.Add(getTotalDistance(intersect, wire1path.Lines, wire2path.Lines));
}
Console.WriteLine(wireDistances.Min());
}
static LineSet GetLines(IEnumerable <Instruction> instructions)
{
LineSet results = new LineSet();
Coordinate start = new Coordinate()
{
x = 0, y = 0
};
Coordinate end = new Coordinate();
int index = 0;
foreach (var instruction in instructions)
{
switch (instruction.direction)
{
case "U":
end = new Coordinate()
{
x = start.x, y = start.y + instruction.distance
};
results.Verticals.Add(new Vertical()
{
x = start.x, y1 = start.y, y2 = end.y, index = index
});
break;
case "D":
end = new Coordinate()
{
x = start.x, y = start.y - instruction.distance
};
results.Verticals.Add(new Vertical()
{
x = start.x, y1 = start.y, y2 = end.y, index = index
});
break;
case "L":
end = new Coordinate()
{
x = start.x - instruction.distance, y = start.y
};
results.Horizontals.Add(new Horizontal()
{
y = start.y, x1 = start.x, x2 = end.x, index = index
});
break;
case "R":
end = new Coordinate()
{
x = start.x + instruction.distance, y = start.y
};
results.Horizontals.Add(new Horizontal()
{
y = start.y, x1 = start.x, x2 = end.x, index = index
});
break;
default:
throw new InvalidCastException("Direction not found " + instruction.direction);
}
//Console.WriteLine(string.Format("{0} to {1}",start.ToString(),end.ToString()));
index++;
start = end;
}
return(results);
}
