3D polylines with featurescript?

albjerre

Hi. I want to make featurescript where I can make a 3D polyline with featurescript. When the polyline is created I also want to be able to make sketch fillets on the corners afterwards. How should I approach this?

One of the featurescript samples is "Featurescript 3D spline". Can I use this as a basis?
https://cad.onshape.com/documents/573f7b36e4b02e83c71782fc/w/7b1a7d7098a0e39517ade066/e/5718da06c22e7b08a5fb58b3

ilya_baran

Making a number of 3D line segments is relatively simple -- and yes, the 3D spline can be used as an example.  Filleting corners would not be (you'd have to create the right sketch plane, "use" the lines and fillet the corner and then trim them).  Here's a script that creates the lines and arcs given 3D points and a radius: https://cad.onshape.com/documents/453c51c8807f37082c1247f3/v/9dac4678249816079b401245/e/8b9b8d950f11fd8c3015a878
Currently, to turn it into one wire body (as opposed to the mixture of 3D lines and sketch arcs that it is currently), you'd have to convert it into something opCreateBSplineCurve could take.  In the near future, you'll be able to combine the results into one curve more easily.

ilya_baran

Making a number of 3D line segments is relatively simple -- and yes, the 3D spline can be used as an example.  Filleting corners would not be (you'd have to create the right sketch plane, "use" the lines and fillet the corner and then trim them).  Here's a script that creates the lines and arcs given 3D points and a radius: https://cad.onshape.com/documents/453c51c8807f37082c1247f3/v/9dac4678249816079b401245/e/8b9b8d950f11fd8c3015a878
Currently, to turn it into one wire body (as opposed to the mixture of 3D lines and sketch arcs that it is currently), you'd have to convert it into something opCreateBSplineCurve could take.  In the near future, you'll be able to combine the results into one curve more easily.

albjerre

Thanks @ilya_baran
For some reason, I did not see your reply before know. Yes, that custom feature was exactly what I needed.

angelo_scozzarella

ilya_baran said:

Making a number of 3D line segments is relatively simple -- and yes, the 3D spline can be used as an example.  Filleting corners would not be (you'd have to create the right sketch plane, "use" the lines and fillet the corner and then trim them).  Here's a script that creates the lines and arcs given 3D points and a radius: https://cad.onshape.com/documents/453c51c8807f37082c1247f3/v/9dac4678249816079b401245/e/8b9b8d950f11fd8c3015a878
Currently, to turn it into one wire body (as opposed to the mixture of 3D lines and sketch arcs that it is currently), you'd have to convert it into something opCreateBSplineCurve could take.  In the near future, you'll be able to combine the results into one curve more easily.

I’d like to know how making a number of 3d line segment. Or if there is a custom future for polylines 3d. Thank you in advance.

Jonathan_Hutchinson

Hi @ilya_baran. On this subject, do you think it would be possible to discretize a spline curve into a polyline with max deviation input? I come from using Rhino, and there was a tool for instance called FitCurve where you enter an amount for max deviation.

My thought is that you maybe do this by converting a spline into a series of arcs and thenyou use the chords to achieve the desired deviation, instead of just dividing up until you achieve the target (which would mean you get a high concentration of point divisions where they aren't needed).

MichaelPascoe

Late response to @angelo_scozzarella: 

Freeform spline can do this by @Evan_Reese. The 3D Lines (which is already in your toolbar if you search; because it is an official custom feature), can do it as well, but it only does orthogonal lines to the world xyz. 3D Lines can also do fillet corners which is cool.

EvanReese

MichaelPascoe said:

Late response to @angelo_scozzarella: 

Freeform spline can do this by @Evan_Reese. The 3D Lines (which is already in your toolbar if you search; because it is an official custom feature), can do it as well, but it only does orthogonal lines to the world xyz. 3D Lines can also do fillet corners which is cool.

It's been on my list to shamelessly borrow the fillet code from 3D lines for Freeform Spline, but it's not as straightforward as I'd hoped. I still think I will do it at some point.

MichaelPascoe

Edit:
@Jonathan_Hutchinson, I was not intending to skip your question. Since it was directed toward Ilya, I was going to let him answer that since I'm not sure about that topic. 

eric_pesty

There's also the routing path FS which is an "improved" version of the 3D lines allowing specifying a direction other xyz for a segment. 

EvanReese

MichaelPascoe said:

Oi, who voted me down? Show yourself! 

@Jonathan_Hutchinson, if it was you, forgive me; I was not intending to skip your question. Since it was directed toward Ilya, I was going to let him answer that since I'm not sure about that topic. 

Oops I mis-clicked haha!

MichaelPascoe

Ty @Evan_Reese