Day 14.txt

    internal class Program
    {
        static void Main(string[] args)
        {
            string[] input = File.ReadAllLines(@"C:\Users\pette\Documents\Aoc14.txt");
            List<Point> pointList = new List<Point>();
            foreach (string s1 in input)
            {
                string[] temp1 = s1.Split(" -> ");
                int preX = 0;
                int preY = 0;
                foreach (string s2 in temp1)
                {
                    string[] temp2 = s2.Split(",");
                    int curX = Convert.ToInt32(temp2[0]);
                    int curY = Convert.ToInt32(temp2[1]);
                    if (preX != 0 && preX != curX)
                    {
                        if (preX < curX)
                        {
                            for (int i = 1; i < curX - preX; i++)
                            {
                                pointList.Add(new Point('#', preX + i, curY));
                            }
                        }
                        else if (preX > curX)
                        {
                            for (int i = 1; i < preX - curX; i++)
                            {
                                pointList.Add(new Point('#', preX - i, curY));
                            }
                        }
                    }
                    else if (preY != 0 && preY != curY)
                    {
                        if (preY < curY)
                        {
                            for (int i = 1; i < curY - preY; i++)
                            {
                                pointList.Add(new Point('#', curX, preY + i));
                            }
                        }
                        else if (preY > curY)
                        {
                            for (int i = 1; i < preY - curY; i++)
                            {
                                pointList.Add(new Point('#', curX, preY - i));
                            }
                        }
                    }
                    pointList.Add(new Point('#', curX, curY));
                    preX = curX;
                    preY = curY;
                }
            }

            int highX = 0;
            int lowX = 500;
            int highY = 0;
            int lowY = 100;
            foreach (Point p in pointList)
            {
                if (p.x > highX)
                {
                    highX = p.x;
                }
                if (p.x < lowX)
                {
                    lowX = p.x;
                }
                if (p.y > highY)
                {
                    highY = p.y;
                }
                if (p.y < lowY)
                {
                    lowY = p.y;
                }
            }

            int width = highX - lowX + 401;
            int height = highY - lowY + 16;

            // Creates map (2-d array).
            Point[,] map = new Point[height, width];
            for (int i = 0; i < map.GetLength(0); i++)
            {
                for (int j = 0; j < map.GetLength(1); j++)
                {
                    map[i, j] = new Point('.', j, i);
                }
                Console.WriteLine();
            }

            // Adds all rock.
            foreach (Point p in pointList)
            {
                map[p.y - lowY + 13, p.x - lowX + 200].materia = '#';
            }

            // Add bottom rocks.
            for (int i = 0; i < map.GetLength(1); i++)
            {
                map[map.GetLength(0) - 1, i].materia = '#';
            }

            //// Prints overview.
            //for (int i = 0; i < map.GetLength(0); i++)
            //{
            //    for (int j = 0; j < map.GetLength(1); j++)
            //    {
            //        Console.Write(map[i, j].materia);
            //    }
            //    Console.WriteLine();
            //}

            //Console.WriteLine();
            //Console.WriteLine();
            //Console.WriteLine();

            int sandStart = 500 - lowX + 200;
            int x = sandStart;
            int y = 0;
            do
            //for (int i = 0; i < 20000000; i++)
            {
                if (map[y, x].materia == '.')
                {
                    if (map[y + 1, x].materia != '.')
                    {
                        if (map[y + 1, x - 1].materia != '.')
                        {
                            if (map[y + 1, x + 1].materia != '.')
                            {
                                map[y, x].materia = 'o';
                                y = 0;
                                x = sandStart;
                            }
                            else
                            {
                                y++;
                                x++;

                            }
                        }
                        else
                        {
                            y++;
                            x--;
                        }
                    }
                    else
                    {
                        y++;
                    }
                }
                else if (map[y, x].materia == 'o')
                {
                    break;
                }
            } while (y < height - 1 && x != 0);

            // Prints overview.
            for (int i = 0; i < map.GetLength(0); i++)
            {
                for (int j = 0; j < map.GetLength(1); j++)
                {
                    Console.Write(map[i, j].materia);
                }
                Console.WriteLine();
            }

            int sum = 0;
            foreach (Point p in map)
            {
                if (p.materia == 'o')
                {
                    sum++;
                }
            }

            Console.WriteLine(sum);

            Console.ReadKey();
        }
    }
}

public class Point
{
    public char materia;
    public int x;
    public int y;

    public Point(char m, int x, int y)
    {
        materia = m;
        this.x = x;
        this.y = y;
    }
    public Point()
    {
        materia = '.';
    }