Menu

Discussion Forum

New Discussion
Filter

Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.

how to make Bézier curves into Bézier surfaces?

Posted Mar 1, 2012, 11:27 a.m. EST Geometry Version 4.2a 6 Replies

LiWah Wong
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

hi peeps

I read an article, saying that by creating Bézier curves, both horizontally and vertically, at which all control points are corresponding with each other, the last curves drawn will form a Bézier surface.

Please see attachment. :)

I did but the whole Bézier polygon seems to be consisted of edges and not yet a surface. Any advise?

ps: I move on trying 'interpolation curve' while waiting for your inputs.

Many thanks!!!!!!!!!!

regards
Liwah

6 Replies Last Post Mar 14, 2012, 9:34 a.m. EDT
LiWah Wong
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago Mar 1, 2012, 11:38 a.m. EST
updates --

Interpolation curve seems to be not working as well. Not too sure if 'parametric surface' helps but to create a particular surface geometry, I am afraid that I could not simply use a formula ('expression').

If I stick with 'Bézier polygon' to create Bézier curves, how to make them into Bézier surfaces by the end?

many thanks!!

regards
Liwah
updates -- Interpolation curve seems to be not working as well. Not too sure if 'parametric surface' helps but to create a particular surface geometry, I am afraid that I could not simply use a formula ('expression'). If I stick with 'Bézier polygon' to create Bézier curves, how to make them into Bézier surfaces by the end? many thanks!! regards Liwah
Alexander Kuznetsov
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago Mar 1, 2012, 12:34 p.m. EST
There is a node "convert so solid" in geometry section. It should work for you.
There is a node "convert so solid" in geometry section. It should work for you.
LiWah Wong
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago Mar 2, 2012, 8:42 a.m. EST
Hi

I tried 'convert to surface' as well as 'convert to solid', the whole thing (as per previous attachment) just disappeared. If I tried with higher default relative repair tolerance, COMSOL ceased
Itself.

any advise? many thanks!!

Regards
Liwah
Hi I tried 'convert to surface' as well as 'convert to solid', the whole thing (as per previous attachment) just disappeared. If I tried with higher default relative repair tolerance, COMSOL ceased Itself. any advise? many thanks!! Regards Liwah
Jaap Verheggen
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago Mar 14, 2012, 9:17 a.m. EDT
I have the same issue, are we missing something?
I have the same issue, are we missing something?
Jaap Verheggen
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago Mar 14, 2012, 9:27 a.m. EDT
Create a workplane first and draw your flat polygon on that. Than add an extrude and extrude the surface you drew on the workplane. That should give you a 3d element.

You need to workplane to be able to extrude.
Create a workplane first and draw your flat polygon on that. Than add an extrude and extrude the surface you drew on the workplane. That should give you a 3d element. You need to workplane to be able to extrude.
LiWah Wong
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago Mar 14, 2012, 9:34 a.m. EDT
hi there

extruded 3D element is a flat plane, I did that for some of my 3D elements. Yet, I need deformed surfaces which could not be extruded from a workplane. I am now trying to create these deformed surfaces from, for instance, hexahedrons (several hexahedrons together forming one deformed surface). Now, my problem is: unable to form union without errors.

any advises are appreciated!! thanks!!

regards
Liwah
hi there extruded 3D element is a flat plane, I did that for some of my 3D elements. Yet, I need deformed surfaces which could not be extruded from a workplane. I am now trying to create these deformed surfaces from, for instance, hexahedrons (several hexahedrons together forming one deformed surface). Now, my problem is: unable to form union without errors. any advises are appreciated!! thanks!! regards Liwah

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.

Suggested Content