SleepHunter.Models.SpellTarget.GetRadiusPoints C# (CSharp) Method

        IEnumerable<Point> GetRadiusPoints(Point center, int innerRadius, int outerRadius)
        {
            for (int i = 0; i <= outerRadius; i++)
              {
            if (i < innerRadius)
              continue;

            if (i == 0)
            {
              yield return center;
              continue;
            }

            var left = new Point(center.X - i, center.Y);
            var right = new Point(center.X + i, center.Y);
            var up = new Point(center.X, center.Y - i);
            var down = new Point(center.X, center.Y + i);

            yield return up;
            yield return right;
            yield return down;
            yield return left;
              }

              var diagonal = (outerRadius - 1);

              for (int y = 1; y <= diagonal; y++)
              {
            if (y < innerRadius)
              continue;

            for (int x = 1; x <= diagonal; x++)
            {
              if (x < innerRadius)
            continue;

              var x1 = new Point(center.X + x, center.Y + y);
              var x2 = new Point(center.X - x, center.Y + y);
              var y1 = new Point(center.X + x, center.Y - y);
              var y2 = new Point(center.X - x, center.Y - y);

              yield return x1;
              yield return x2;
              yield return y1;
              yield return y2;
            }
              }
        }