static IEnumerable <Int32Vector> GetPoints()
{
var point = new Int32Vector();
var delta = new Int32Vector {
X = 1
};
var points = new HashSet <Int32Vector>();
points.Add(point);
bool IsValid(Int32Vector p) => IsInRange(p) && !points.Contains(p);
while (true)
{
var p = point + delta;
if (!IsValid(p))
{
delta = TurnRight(delta);
p = point + delta;
if (!IsValid(p))
{
return(points);
}
}
point = p;
points.Add(point);
}
}
static Int32Vector TurnRight(Int32Vector v) => new Int32Vector
{
X = -v.Y, Y = v.X
};
static bool IsInRange(Int32Vector p) => 0 <= p.X && p.X < Width && 0 <= p.Y && p.Y < Height;