I’m trying to create a curve (in red); tangent from the other curve (in cyan); to a point (in yellow). I created this before, using the onsap tangent command. I just clicked a point on the curve (Cyan) and it gave me the tangent option. But now its not letting me! Help would be greatly appreciated!

There are number of ways. To use the tangent osnap, just start from the point above and you will be able to snap tangent to the cyan curve.

You could also use BlendCrv between the curve and a point (or another curve) and move handle end point to a specific location.

I use blend crv for this type of stuff,

Thanks a lot!

@PaulD , if the new curve is an arc, try:

Arc Tangent (click on the curve at the desired start point), then FromFirstPoint to stop the end wandering along the curve, then Point option- end the arc at the desired end point, then click to pick one of the two possible arcs.

-Pascal

Thank you Pascal, good to know

I have just tried this using InterpCrv working my way along the dimension arrow tips and when I get to a circle, with Osnap tan I pick the circle. Cut the circle and join to my curve and its not a tangent junction. I could see that before even using curvature graph on it.

How is Osnap tan supposed to work as clearly here it doesnt snap to tangent.

Starting a curve tangent from a curve or circle is also another need that I struggle with.

see attached 3dm file.

Osnap tan is not tan.3dm (32.3 KB)

Steve

The way I described works only for control point Curve. For InterpCrv tangent osnap works apparently just for a line formed by two last picked point, not for curve itself.

I would just use SmartTrack (in status bar). It will show you tangent direction from an end of a curve (so you would need to trim a circle before).