Tangent on Spline Tool

[Douglas]

@Grace

I realise that. And the green line’s tangent would be a little to the right of where you have it to be a tangent, so it wouldn’t cross the spline’s line.

I know… this was meant as a sketch. not as a precise drawing. I didn’t feel like going back and forth by .05 to put it on the line. Not to mention the curve could be quite different than what I drew.

@Grace

Would it be possible to choose only a section of the spline that we would want a tangent point on, instead of the whole spline? For example, we could select the section A2 to A1 instead of A2 to A4.

At this point - since there is no tool defined - we can do what ever we want.

Me… I would just find all tangents, create a drop list that you could select from. Actually it’s the same sort of issue we have with the Intersect Curve & Axis, where we can only get the 1st intersect along the curve, when sometimes you may want the second (3rd etc) OR both so you can create a line between the 2. So maybe we could have a radio button First, Last, All? So in my sketch… First would be the Pink (A6) , last would be the Green (A8) , and all would be Pink, Red (A7), and Green. Might have to make the radio button only visible for the 1st time through the dialog, as you couldn’t have it create all the Points, and then at some edit to use the first, where some other tools use other points.