Update tutorials/2d/custom_drawing_in_2d.rst

Co-authored-by: Raul Santos <raulsntos@gmail.com>

tutorials/2d/custom_drawing_in_2d.rst

@@ -1023,14 +1023,14 @@ Calculating this arc will be more complex than in the case of the line:
  public override void _Draw()
  {
  // Calculate the arc parameters.
- Vector2 center = new Vector2((point2.X - point1.X) / 2.0f,
- (point2.Y - point1.Y) / 2.0f);
- float radius = point1.DistanceTo(point2) / 2.0f;
- float start_angle = (point2 - point1).Angle();
- float end_angle = (point1 - point2).Angle();
- if (end_angle < 0.0f) // end_angle is likely negative, normalize it.
+ Vector2 center = new Vector2((_point2.X - Point1.X) / 2.0f,
+ (_point2.Y - Point1.Y) / 2.0f);
+ float radius = Point1.DistanceTo(_point2) / 2.0f;
+ float startAngle = (_point2 - Point1).Angle();
+ float endAngle = (Point1 - _point2).Angle();
+ if (endAngle < 0.0f) // endAngle is likely negative, normalize it.
  {
- end_angle += (float)Math.Tau;
+ endAngle += Mathf.Tau;
  }
 
  // Finally, draw the arc.