Importing polygonal shapes and redefine them

Hey guys,

I am a beginner in working with rhino and I hope to get some help. I sure there is a simple solution for my question!

I want to know how to create smooth shapes for holes and pins like on this lego peace.

https://d2t1xqejof9utc.cloudfront.net/pictures/files/78867/large.PNG?1458180831

You can see it on the pic I’ve found on the internet: on the right: just after the import/ on the left: changed parameter settings.

So, are there any settings I have to make when I import a brick?

Or do I have to change the parameters after the import? How does it works?

Could anyone help me in this case?

Thanks you very much!

@Peter84,

after importing your mesh, try the command _Weld eg. with an angle setting of 20 or higher. Check out the helpfile for _Weld und _Unweld too.

c.

Rhino doesn’t have any tools to automatically add details to a mesh in places where the mesh doesn’t have detail. This is not just a question of changing some parameters. (going the other way - from the left shape to something like the right (disregarding the part that sticks up) - is simpler).

I am guessing but it would appear that you want to get a smooth NURBS object out of a rough mesh model. That process is called reverse engineering and is a very difficult process. There are a few plug-ins available to help you (check the resources page) but they tend to be expensive. There is also an informative document available on the Rhino wiki. http://wiki.mcneel.com/rhino/reverseengineering

Success at Reverse Engineering, ie going from a mesh to smooth NURBS surfaces, is much more likely if the user knows how to create geometry starting from “scratch” with similar shapes and arrangement.