Offsetsrf Failure On Complex Polysurface

  



I’m trying to speed up design and fabrication of complex forms using plywood and MDF sheet. I’ve found that both the Rhino command Grasshopper components for OffsetSrf frequently fail to produce good results. Specifically, with polysurfaces with only planar faces, when the polysurface has a combination of triangular and ngon faces and/or a combination of convex and concave edges, the.

Offsetsrf Failure On Complex Polysurface Work

Permalink Reply by Erick Vásquez on June 11, 2011 at 3:46pm

Hi Mohamed

I found this definition, and run ok

  1. Hey guys, I am having an annoying problem. I am trying to create a diagrid structure using the lunchbox tools, but I have a polysurface that I cannot make in.
  2. Pipe - Create a surface, polysurface, or extrusion object with a circular profile around a curve. Offsetsrf - Copy a surface parallel to the original. Fitcrv - Make a non-rational NURBS curve of a specified degree that matches the input curve to within the specified tolerance.
  3. Still in the OffsetSrf command press S key to say to Rhinoceros to offset the surface has a solid. Now write the thickness desired and then Enter (all these instructions are presented in the command prompt just follow them) Final result (1) Final result (2) 4.3. Notes. Keep in mind that we are dealing with computers and because of that we.

Erick

Attachments:
  • MESH TO BREP.ghx, 867 KB
Permalink Reply by Mohamed Naeim on June 11, 2011 at 4:06pm

thanks Erick .. what about the second part , is it possible to populate component into mesh the same way we subdivide a surface

Permalink Reply by Dedackelzucht on June 14, 2011 at 4:02am

My version is quiet simillar.

have a look.

Best Regards

DeDackel

Attachments:
  • 110614_define Mesh edges_CreateSrf_DeDackel.ghx, 425 KB
OffsetsrfOffsetsrf Failure On Complex Polysurface
Permalink Reply by Michael Pryor on March 21, 2013 at 7:32am

This way you can do quad and tri mesh in one def, good for meshes that have both.

Attachments:
  • Mesh2Nurbs.gh, 4 KB
Permalink Reply by Tim Halvorson on May 6, 2016 at 11:09am
Permalink Reply by Andrea van Hintum on January 16, 2015 at 10:09pm

Hello, I am trying to turn my mesh of my corset into a surface. this definition works for my mesh. I will be 3D printing the corset and it will be in my senior collection at the Savannah College of Art and Design. Would you give me the permission to use this definition? I will include your name in my progress and description summary.

-Andrea

avanhi20@student.scad.edu

Permalink Reply by Dedackelzucht on January 18, 2015 at 1:59pm

Offsetsrf Failure On Complex Polysurface Health

hey,

do mean my file? If so, of course you can use it!

Have fun with it! And thank you for asking, this has been the first time ever someone asked me, :-)

Good luck and all the best! Flexisign pro 8.6 v2 crack key.

Permalink Reply by chloexiao on February 14, 2012 at 11:52pm
Permalink Reply by Miklós Hatvani Deák on December 19, 2012 at 7:37am

I conected it to a 'wbCatmullClark' (it is mesh) command and the Command 'Vertices' is red. Why ?

What do you think ? Bluestack terbaru.

Best regards,

Miklos

Permalink Reply by felipe mateo on December 11, 2011 at 6:22pm


I'm using thistraditional method. Hotmail messager.

Offsetsrf Failure On Complex Polysurface Examples

regards

files: http://www.mediafire.com/?3jmca64vad1zep9

Permalink Reply by s-sharky on August 22, 2014 at 7:15am

Hi, I just tried to use the method but I ran into a problem when trying to use loft. My mesh might be too complicated, would you know how to fix my problem please? Is there a way how to fix the crazy LOFT ? Thanks a lot, Sharka

Permalink Reply by s-sharky on August 22, 2014 at 7:37am
Attachments:
Failure
  • sarka.3dm, 148 KB
  • sarka gh.gh, 22 KB
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Permalink Reply by Arthur Mamou-Mani on May 19, 2010 at 8:21am
Salut Timothée !
Have look at the previous conversation (giulio's definition):
http://www.grasshopper3d.com/forum/topics/mapping-a-rectangular-grid
you can use it to populate components on a polysurface (using the four corners of the grid for each surface).
Permalink Reply by Timothée Raison on May 19, 2010 at 12:59pm
Hi Arthur, thanks for the answer.
I'm not sure if it fits to my project.. I'm concerned with surfaces with both conditions: curved parts and sharp edges (as you can achieve lofting one degree curves). I join a picture, it might be easier to see what I mean.
The solution you offered me is leading to a faceted polygonal surface, right? or maybe it's that I don't get how to relate this definition to the morph tool? I would like to morph the components according to the curvature of the surface. In addition to this, the UV divisions are linked and I couldn't find a way to control them separately (when I do it, the resulting mesh gets crazy!!).
thanks for the help.
timothée
Permalink Reply by Timothée Raison on May 19, 2010 at 6:13pm
here comes the picture. seem like something was wrong with the previous post..

Offsetsrf Failure On Complex Polysurface Symptoms

Attachments:
  • curvedSurf_sharpEdges.jpg, 223 KB
Permalink Reply by Gwyll on May 19, 2010 at 9:31pm
If you just want to populate the polysurface with components that are oriented according to the curvature of the surface you can contour your polysurface and use the generated points to map components to. This gives you an even grid with each point responding to its respective surface topology. You wont be able to use this grid to form components with shared edges though - as it gets difficult to bridge individual surface gaps. To do that I would suggest maybe meshing your surface into reasonably uniform quads, offsetting those and embedding your components between. This will simplify your surface in a fairly violent fashion though.
As usual, Ive got an explanation of the polysurface grid definition on my blog: http://ledatomica.wordpress.com/2010/03/28/grids-on-polysurfaces/

Offsetsrf Failure On Complex Polysurface In Rhino

Permalink Reply by Timothée Raison on May 21, 2010 at 5:29pm
Hi Gwyllim and thanks for your help!
the solution on your blog is interesting (actually I have to say that I found very interesting stuff all over you blog as well!!!)
I was trying to rebuild the definition but I miss two components, in the second part (the second pic). I don't know what are the two components before 'eval'(the last one)? one is polySrfGrid, but I can't find it anywhere and the one before is a kind of slider I have never seen yet (sorry for those very basic questions but I'm still very new to GH).
thanks.
timothée
Permalink Reply by Gwyll on May 21, 2010 at 10:09pm
Complex
The PolySrfGrid was a label that I made for Surface closest point component - it does make for a confusing 'tutorial' and I'd be surprised if people can easily reproduce the definition. The strange slider I think is a path mapper component - In this definition it lets me 'flatten' certain parts of the tree structure.
Ive uploaded the definition for you to check against your own, or you can just use it instead. Its at the bottom of the blog post.
Thanks for checking out my stuff.
Permalink Reply by Adam Fenton on September 25, 2011 at 5:54am
this is a great definition but does not seem to be working for me. The section component does not work. Is there any chance you could maybe sent the rhino file and gh file to my email to see how it works? Thanks
da_fenda@hotmail.com