protected override string SolvePartOne()
{
Intcode intcode = new Intcode(Input, 2);
//intcode.Run();
// Traverse the hull
// If a tile exists, return the color appropriately
// If not, it hasn't been painted and it is black
int x = 0;
int y = 0;
int dir = 0; // 0 == up, 1 == right, 2 == down, 3 == left
while (intcode.State == State.Waiting)
{
// Each run is:
// Send tile color input
// Run
// Retrieve new? color
// Run
// Retrieve direction
// Change direction and update x/y
IEnumerable <HullTile> search = tiles.Where(t => t.x == x && t.y == y);
HullTile t;
if (search.Count() == 0)
{
t = new HullTile()
{
x = x, y = y, color = 0
};
}
else
{
t = search.First();
// Remove the tile so we can update it
tiles.Remove(t);
}
// Send the color value
intcode.SetInput(t.color);
intcode.Run();
// Get new color value
t.color = Convert.ToInt32(intcode.output_register);
// Add to the list
this.tiles.Add(t);
// Continue to get the direction
intcode.Run();
// Change direction
if (intcode.output_register.Dequeue() == 0)
{
dir -= 1;
}
else
{
dir += 1;
}
// Correct the value
if (dir < 0)
{
dir += 4;
}
dir %= 4;
switch (dir)
{
case 0:
y -= 1;
break;
case 1:
x += 1;
break;
case 2:
y += 1;
break;
case 3:
x -= 1;
break;
}
// Move on!
}
return(this.tiles.Count.ToString());
}
protected override string SolvePartTwo()
{
// Starts on a single white panel
this.tiles = new List <HullTile>();
Intcode intcode = new Intcode(Input, 2);
//intcode.Run();
// Traverse the hull
// If a tile exists, return the color appropriately
// If not, it hasn't been painted and it is black
int x = 0;
int y = 0;
int dir = 0; // 0 == up, 1 == right, 2 == down, 3 == left
bool first = true;
while (intcode.State == State.Waiting)
{
// Each run is:
// Send tile color input
// Run
// Retrieve new? color
// Run
// Retrieve direction
// Change direction and update x/y
IEnumerable <HullTile> search = tiles.Where(t => t.x == x && t.y == y);
HullTile t;
if (search.Count() == 0)
{
t = new HullTile()
{
x = x, y = y, color = 0
};
}
else
{
t = search.First();
// Remove the tile so we can update it
tiles.Remove(t);
}
if (first)
{
t.color = 1;
first = false;
}
// Send the color value
intcode.SetInput(t.color);
intcode.Run();
// Get new color value
t.color = Convert.ToInt32(intcode.output_register);
// Add to the list
this.tiles.Add(t);
// Continue to get the direction
intcode.Run();
// Change direction
if (intcode.output_register.Dequeue() == 0)
{
dir -= 1;
}
else
{
dir += 1;
}
// Correct the value
if (dir < 0)
{
dir += 4;
}
dir %= 4;
switch (dir)
{
case 0:
y -= 1;
break;
case 1:
x += 1;
break;
case 2:
y += 1;
break;
case 3:
x -= 1;
break;
}
// Move on!
}
string output = "\n";
int sy = tiles.Min(a => a.y);
int ey = tiles.Max(a => a.y);
int sx = tiles.Min(a => a.x);
int ex = tiles.Max(a => a.x);
for (y = sy; y <= ey; y++)
{
for (x = sx; x <= ex; x++)
{
HullTile tile = tiles.FirstOrDefault(a => a.x == x && a.y == y);
if (tile == null || tile.color == 0)
{
output += " ";
}
else
{
output += "#";
}
}
output += "\n";
}
return(output);
}
