# How to shape an object between two curves

Hi, I need to make a structural surface between two diferent curves and at the same time rotated by a central axis.
I can upload a screenshot of grasshopper, a screenshot of the floorplan I want to make and the grasshopper file in case it helps.

Modelado 3D.3dm (1.4 MB)

1 Like

It almost always helps! Don’t wait for people to beg for it.

1 Like

iso curves.gh (23.6 KB)

Rebuild the curves, adjust the seams, and get the iso curves of the surface.

Welcome to the forum.
Please read this and attach the gh file to get help next time.

1 Like

But all the isocurve lines don’t meet at a single center point, as they appear to be in the posted image (and hidden layer). I had too many questions to clarify objectives so abandoned my effort; no GH file posted was also a factor.

Hi Lara, for the set of red curves, perhaps you could:
1 make surface between yellow and purple lines (e.g. loft, though I think trim gives ‘better’ surface)
2 get long version of red lines by radial pattern (e.g. rotate)
3 get the red lines to show up on the surface from 1. (e.g. split, project)

1 Like

If ‘some kind of loft of across stuffs falling on the plane of the red lines’ vertical extrusion’ is the next step, I do wonder if there is a risk of over-defining the surface

1 Like

There are three ways that I can think of (left to right–>top to bottom)

• first one, you extract the part of the radial lines that is inside your ‘ring’ and loft them.
Single surface with correct flow
• second, you loft the two circular curves and just cut the surface with the radial lines.
Multiple surfaces but no flow
• Third: the most complex: you create individual surfaces for each section that retain the ‘flow’ It might be a tad more difficult to handle but combines the advantages of the previous two methods
Multiple surfaces / correct flow

You can select, depending on how you want to use it in the next steps of your project.

pavillion.gh (17.1 KB)

2 Likes

Thanks you so much guys! You’ve help me a lot