Brep join failed !!

Hi fellows ,

I need your help . I cant join untrimed surfaces into brep and I donot know how to debug .

As the follow picture shows, i have this four curves ,and I wanna loft them and get four boundary surfaces:

After that, I tried to join them together within gh ,but gh did nothing and give me four surfaces .I baked them into rhino ,and join them in rhino environment ,rhino just joined two surface into one open brep and leave the left two surfaces there . I donot know what's wrong I had done and how to debug this ??Thanks for help !!

Replies to This Discussion

Permalink Reply by Dedackelzucht on August 10, 2011 at 4:10am

Hey, you might wann post the baked Crvs.

here it works

Best Regards

DeDackel

Permalink Reply by Alpha222 on August 10, 2011 at 6:15am

Hi DeDackel ,

Thanks for your help !! This method works, but sometimes not works prefectly .see picture below:

What's the best way to make a "stright" and smooth loft ?? I tried to modify the loft options, cant get the prefect result .Any tips ?? Any one ?

Permalink Reply by Dedackelzucht on August 10, 2011 at 6:18am

Hey

this has to do with the curve seams.

try to use the loft options and "adjust seam" to "True"

If this not woks...I will search for a ghx I got

Best Regards

DeDackel

Permalink Reply by Alpha222 on August 10, 2011 at 6:19am

One way I thought out was that ,I project the top curves onto cplane, then loft them together . This seems worked, but other problems occured .After I join boundary surfaces ,sometimes I get closed brep. sometimes i get open breps .It seems not stable .

Permalink Reply by Dedackelzucht on August 10, 2011 at 6:27am

Try this

Attachments:

AdjSeam_Loft_DeDackel.3dm, 34 KB
AdjSeam_Loft_DeDackel.ghx, 177 KB

Permalink Reply by Alpha222 on August 10, 2011 at 6:58am

Sorry , I didnot see this .Will try it now ! Thanks!!

Permalink Reply by Alpha222 on August 10, 2011 at 7:16am

Hi Deda,

Thanks for this help .Adjusting seams is great .

This logic is great ,but once the CPs of those curves is not the same , the result would not works prefectly ,like this case .

Permalink Reply by Alpha222 on August 10, 2011 at 6:28am

Maybe a "close brep" node would handle this ?(Inspired by David's close curve script, just a thought).

Permalink Reply by Alpha222 on August 10, 2011 at 6:42am

It changes when I modify something and look at them again:

I am crazy !!

Permalink Reply by Mateusz Zwierzycki on August 10, 2011 at 3:58pm

OT : your Grasshopper looks odd ;)

Permalink Reply by Alpha222 on August 10, 2011 at 6:54am

To show what I mean more clearly ,see this picture:

I use the same method(loft&join) and I get there brep: two of them are open brep and one is closed brep .I have to do some boolean computation after that , but I cant closed them .