brep curve trim function

Hey,
I would like to ask if there is another possibility than in the link below for trimming breps with curves, this is from 2009. I didn't find sth more up-to-date, ... I run into this problem while I played arround with some stuff and the solution with the VB component didn't work for me.
The picture shows my attempt using solid trim on the left, but what I want to reach is on the right (which is made manually in rhino)

I appreciate any ideas and help!

Thanks!

LINK: surface-trim workflow

Replies to This Discussion

Permalink Reply by Michael Pryor on April 17, 2012 at 3:21pm

Attachments:

trim brep.gh, 5 KB

Permalink Reply by Sebastian L. on April 17, 2012 at 4:22pm

Uh thanks Michael, this was a fast reply! hm ok, this seems to work perfectly in 2D! When I try to map it onto a more organic form it won't work (red part). I attached my attempt on it. Maybe or more hopefully you can bring me on the right track! Also, how can I achieve it to make the extruded parts perpendicular to the surface normals? You know for going on with weaverbird and stuff, ...

Thanks again for your effort!

Attachments:

Sebastian_voronoi_1.gh, 18 KB

Permalink Reply by Michael Pryor on April 17, 2012 at 8:22pm

Attachments:

trimbrep2.gh, 5 KB

Permalink Reply by Sebastian L. on April 18, 2012 at 10:51am

ok, thanks for your time and support! I adapted it on my definition and it works perfectly!

But for going a bit further and playing arround with it. I used some time ago a script for pneumatic cladding, can't find it at the moment. So I would try to do this kind of bubbles with the voronoi cells and grasshopper (picture below), is there a chance for doing it? I tried it with 3 points; center of cells, point on curve and extruded point to the perpendicular center face but I don't know how to create a curve like in the pic below, which I did manually in rhino for showing what I mean. Any idea?

Furthermore, I have a problem with the closest point function. It works only partly. As you can see in the following picture. Sometimes, the points are getting used by the neighbour cells. What is the problem in this case? And how can I solve it?

I attached my definition.

Thanks for any help and hints!

Attachments:

Sebastian_voronoi_1.gh, 31 KB

Permalink Reply by Michael Pryor on April 18, 2012 at 12:16pm

I would just use the surfaces we removed for he holes as the cells and inflate them with pressure forces in kangaroo. http://www.grasshopper3d.com/video/kangaroo-pressure-force

Permalink Reply by Sebastian L. on April 18, 2012 at 1:12pm

Hey Michael,
thx for your reply. I checked it out with the inflate stuff but as far as I get it it is only for planar curves, surfaces or meshs. I have no idea how to adapt them on my double curved curves and surfaces.

Inflatables example?

Furthermore, the examples I've seen show also a not even surface you see this pressure marks and dents. It don't seems to be uniform?!

Is there a way to rewrite or transcribe a script for rhino to use it in GH? Or is it possible to use rhino scripts in GH? I have no idea about scripting, sry^^

Thanks for your help!

Sebastian

Permalink Reply by Michael Pryor on April 18, 2012 at 1:22pm

I also have no idea of scripting, you wont see the dents when smoothed with weaverbird, The inflation can work on surfaces, I suggest some experimentation. try these out, I forget where I got them, they are a start.

Attachments:

inflatetriangulatededges.gh, 9 KB
inflatetriangulatedpoints.gh, 7 KB

Permalink Reply by Sebastian L. on April 18, 2012 at 1:34pm

Thanks, I will give it a try the next days I am off for a long weekend, ...! Maybe I am able to present a solution on monday. We'll see^^

Thanks again, bye!

Permalink Reply by Yoshi Fukumori on April 23, 2012 at 10:34am

hello! I think if you want to make a voronoi division on a curved surface, this works better

Attachments:

voronoi srf.gh, 6 KB

Permalink Reply by Sebastian L. on April 23, 2012 at 1:11pm

Hey Yoshi, thanks!
Think the problem with your def is, that it is always edged. Means, it is not shaped smoothly. Therefore I need to implement the "surface morph" component like in the definitions above. But thanks for the hint. It is nice to see all this different approach regarding to the voronoi system!

But the main question still remains: How to solve the problem with the inflation and Kangaroo, geometry gym, weaverbird or whatever. Mentioned in the pictures above. I will work on it the next days, it is just for a better understanding of the tools and how they work together, ...

But thanks for any approach regarding this problem!

Permalink Reply by Yoshi Fukumori on April 24, 2012 at 2:49am

I think the best way is with Kangaroo, I hope this works for you. Cheers!

Attachments:

voronoi srf2.gh, 15 KB

Permalink Reply by Sebastian L. on April 24, 2012 at 3:48am

Hey Yoshi,
wow thanks this works perfectly! Playing arround with the pressure looks funny! ;) Yeah, now I better understand the logic behind the kangaroo pressure tool, Thanks a lot!

By the way, I owe you a beer! ;) We should meet again the next days or week, when do you have some time? There is a nice exhibition of Helmut Newton at the Grand Palais.

cya