Sloped Extrude To Replicate Arena Seating

[Alex Talbot]

I'm attempting to draw the raked edge/seating section of a circular/oval arena, and have run into trouble getting the surface to make a clean extrude with the Vectorworks 3D model toolset. The top surface in the attached image is a drawn NURBS curve that has been converted into a solid, and the bottom piece is a NURBS curve converted into a 2D Polygon. Both objects are able to extrude, but I haven't found a clean way to combine/extrude them both to replicate the 3D object I'm trying to draw. Is there a VWX tool I'm missing that can do this easily? I've already tried multiple different 'subtract/add solid' methods, and haven't achieved what I'm going for. 

Edited June 13, 2022 by Alex Talbot

[Kevin McAllister]

Are you trying to create an extrude with a sloped/curved top surface? If both your top and bottom object were NURBS curves you could connect between them and create a solid using the Loft Surfaces Tool.

 

Your reference is a little different than what you're describing. It's a series of stepped slabs. If that's more what you'd like to create, I would draw the stepped side section, extrude it into a rectangular step unit and then slice the sides off at an angle using the Split Tool.

 

Kevin

 

[EAlexander]

Kevin is right - arena seating is stepped with usually a 12-18" rise for sightlines.  Take a look at my Extrude along Path video - at the 26:40 mark I demonstrate how to build arena seating with Extrude along Path.

 

Edited June 14, 2022 by EAlexander