public static void PartOne()
{
List <string> lines = Utils.GetLinesFromFile("input/Day17Input.txt");
List <Tuple <int, int> > clay = new List <Tuple <int, int> >();
foreach (string line in lines)
{
string[] coords = line.Split(", ");
int firstValue = Convert.ToInt32(coords[0].Substring(2));
string[] range = coords[1].Split("..");
int secondStart = Convert.ToInt32(range[0].Substring(2));
int secondEnd = Convert.ToInt32(range[1]);
for (int i = secondStart; i <= secondEnd; i++)
{
Tuple <int, int> newClay;
if (line.StartsWith("y"))
{
newClay = new Tuple <int, int>(i, firstValue);
}
else
{
newClay = new Tuple <int, int>(firstValue, i);
}
clay.Add(newClay);
}
}
int minX = clay.Select(x => x.Item1).Min() - 1;
int maxX = clay.Select(x => x.Item1).Max() + 1;
int minY = clay.Select(x => x.Item2).Min();
int maxY = clay.Select(x => x.Item2).Max();
GridContents[,] grid = new GridContents[maxY + 1, maxX - minX + 1];
foreach (Tuple <int, int> item in clay)
{
SetAt(grid, item.Item1 - minX, item.Item2, GridContents.Clay);
}
FillWithWaterFrom(grid, 500 - minX, minY - 1);
int total = 0;
for (int currentY = 0; currentY < grid.GetLength(0); currentY++)
{
for (int currentX = 0; currentX < grid.GetLength(1); currentX++)
{
switch (grid[currentY, currentX])
{
case GridContents.None:
break;
case GridContents.Clay:
break;
case GridContents.UnsettledWater:
total++;
break;
case GridContents.SettledWater:
total++;
break;
}
}
}
Console.WriteLine("We can make {0} squares of water", total);
}
public static void SetAt(GridContents[,] grid, int x, int y, GridContents value)
{
grid[y, x] = value;
}
public void UpdatePointOfInterest(GridReference reference, GridContents newContent)
{
PointAtLocation(reference).Contents = newContent;
}
public static void FillWithWaterFrom(GridContents[,] grid, int x, int y)
{
for (int currentY = findFloor(grid, x, y); currentY > y; currentY--)
{
bool wallsOnBothSides = true;
SetAt(grid, x, currentY, GridContents.UnsettledWater);
if (currentY == grid.GetLength(0) - 1 || GetAt(grid, x, currentY + 1) == GridContents.UnsettledWater)
{
continue;
}
int leftWall = 0;
int rightWall = 0;
int currentX = x;
while (true)
{
currentX--;
GridContents contents = GetAt(grid, currentX, currentY);
if (contents == GridContents.Clay)
{
leftWall = currentX;
break;
}
else
{
SetAt(grid, currentX, currentY, GridContents.UnsettledWater);
if (GetAt(grid, currentX, currentY + 1) == GridContents.None)
{
FillWithWaterFrom(grid, currentX, currentY);
if (GetAt(grid, currentX, currentY + 1) == GridContents.UnsettledWater)
{
wallsOnBothSides = false;
break;
}
}
}
}
currentX = x;
while (true)
{
currentX++;
GridContents contents = GetAt(grid, currentX, currentY);
if (contents == GridContents.Clay)
{
rightWall = currentX;
break;
}
else
{
SetAt(grid, currentX, currentY, GridContents.UnsettledWater);
if (GetAt(grid, currentX, currentY + 1) == GridContents.None)
{
FillWithWaterFrom(grid, currentX, currentY);
if (GetAt(grid, currentX, currentY + 1) == GridContents.UnsettledWater)
{
wallsOnBothSides = false;
break;
}
}
}
}
if (wallsOnBothSides)
{
for (currentX = leftWall + 1; currentX < rightWall; currentX++)
{
SetAt(grid, currentX, currentY, GridContents.SettledWater);
}
}
}
}
public GridReference(int x, int y, GridContents content = GridContents.empty)
{
ThisX = x;
ThisY = y;
Contents = content;
}
