/// <summary>
/// Detects and returns edges in a map
/// </summary>
public ValueMap DetectEdges(float threshold)
{
ValueMap firstPass = CreateInstance <ValueMap>();
firstPass.Initialize(Width, Height);
for (int x = 0; x < Width; x++)
{
for (int y = 0; y < Height; y++)
{
firstPass[x, y] = 0;
for (int i = x - 1; i <= x + 1; i++)
{
for (int j = y - 1; j <= y + 1; j++)
{
if (IsInsideBounds(i, j))
{
if (Mathf.Abs(this[x, y] - this[i, j]) > threshold)
{
firstPass[x, y] = 1;
break;
}
}
}
}
}
}
ValueMap secondPass = CreateInstance <ValueMap>();
secondPass.Initialize(Width, Height);
for (int x = 0; x < Width; x++)
{
for (int y = 0; y < Height; y++)
{
if (firstPass.CountItemsInRegion(new Vector2Int(x - 1, y - 1), new Vector2Int(x + 1, y + 1), 1) > 8)
{
secondPass[x, y] = 0;
}
else
{
secondPass[x, y] = firstPass[x, y];
}
}
}
return(secondPass);
}