Polyextrude curve

[anicg]

I can't get any geometry to extrude along a curve, here is a screenprint for a box, which was illustrated in a 2015 video by Sidefx. I have tried polygon curve, nurbs curve. Has something changed? am I doing something wrong?

 

 

[underscoreus]

Not quite sure why it does not work for you, I'd need to have a look at your scene file. It seems to work for me. Only thing I noticed is that I needed to pull the "distance" slider to 1 and that the extrusion did not extrude along the spline like I expected but rather extruded into the shape of the spline.

Polyextrude_mnb.hipnc

Edited May 19, 2021 by underscoreus

[anicg]

It really doesn't want to work for me, it's completely ignoring the curve. Here is the file and the making of the file (video recorded less than 2 minutes).

Any idea why it's not working?

Polyextrude_Along_Curve-1.m4v

untitled.hiplc

[underscoreus]

Alright, got it.
To get it working there are two things you'll need to fix.
1. Make sure to give the extrusion quite a few "divisions" to allow it to assume the shape of your curve. Just assigning 1 will only ever allow it to make a straight line. I've used 50 divisions but this can obviously be tweaked to what you want/need.
2. I don't think the extrusion always follows the direction of the path by default. Even when in "Curve from second input" mode it will try to extrude along either the primitive normal or a point normal, so to get your box to extrude along your curve just assign the box a point normal that points along the direction of the path (something like 1,1,0) and then choose to extrude along an existing point normal attribute.

After doing that it looks more or less how you'd expect.

Hope that can be helpful!