Hi eric,

> Think of a straight line and then a tangential curve to another point (located by the mouse)
> and then a tangential straight line again

Yeah but with the method you're describing here (arc tangent to previous segment and to a specific point) fully defines the arc and results in a particular radius being used which is calculated for you.

If you want to specify the radius, it would be a bit different than that, instead of picking the end point of the arc you would be picking the end points of all the "corner points" same as you do for a regular polyline, but the corner formed at the previous picked point would get replaced with an arc just as if you had filleted it.


Is the method you are talking about here "tangent curve to another point located by the mouse" specifically something you need like do you need to end a polyline with an arc piece at the very end of it? Or would having the equivalent of fillets at corners of the polylines work ok for what you need?

- Michael