remeshsurf

[andrea]

Hello,

I downloaded you iso2mesh toolbox, which works great but I really need some help if you can.
I am currently using iso2mesh in order to mesh an imported CAD file (ASCII STL file, the simplest one to import) and then to extract only the surface mesh coordinates. The surf2mesh tool was the best choice for me as I could easily move from STL isosurfaces to surface mesh.

My question is: is there any possibility of oversampling the mesh structure only in some parts of the surface? I am wondering about the possibility of having smaller triangles on the surface edges than in the rest of the element. I tried to use remeshsurf, but it totally failed as it does not allow me to select where I want to oversample and, most of all, remeshsurf gives me back a deformed surface element (either if I try to oversample or to downsample), always with a larger volume than the initial conditions (for example, if I try to mesh a cube and then to use remeshsurf, what I finally have is not anymore a perfect cube, but a bigger cube with very irregular edges). That's something I shall avoid as I am only interested in remeshing the surface points without alterating the whole geometry.

Regards,

Andrea 

[Qianqian Fang]

On 09/20/2013 11:31 AM, andrea wrote:

Hello,

I downloaded you iso2mesh toolbox, which works great but I really need some help if you can.
I am currently using iso2mesh in order to mesh an imported CAD file (ASCII STL file, the simplest one to import) and then to extract only the surface mesh coordinates. The surf2mesh tool was the best choice for me as I could easily move from STL isosurfaces to surface mesh.

hi Andrea

glad to know it worked for you.

My question is: is there any possibility of oversampling the mesh structure only in some parts of the surface? I am wondering about the possibility of having smaller triangles on the surface edges than in the rest of the element. I tried to use remeshsurf, but it totally failed as it does not allow me to select where I want to oversample and, most of all, remeshsurf gives me back a deformed surface element (either if I try to oversample or to downsample), always with a larger volume than the initial conditions (for example, if I try to mesh a cube and then to use remeshsurf, what I finally have is not anymore a perfect cube, but a bigger cube with very irregular edges). That's something I shall avoid as I am only interested in remeshing the surface points without alterating the whole geometry.

yes, you can. check out this page:

http://iso2mesh.sourceforge.net/cgi-bin/index.cgi?Doc/AdaptiveMesh

this script is also included as iso2mesh/sample/demo_refine_spherebox_mesh.m

basically, you can use nodesize (the 4th column in the node list)
to set the desired mesh density in space. If you are only interested
in the surface mesh, you can take only the face output from
surf2mesh.

Qianqian

Regards,

Andrea 

--
You received this message because you are subscribed to the Google Groups "iso2mesh-users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to iso2mesh-user...@googlegroups.com.
To post to this group, send email to iso2mes...@googlegroups.com.
Visit this group at http://groups.google.com/group/iso2mesh-users.
For more options, visit https://groups.google.com/groups/opt_out.

The information in this e-mail is intended only for the person to whom it is
addressed. If you believe this e-mail was sent to you in error and the e-mail
contains patient information, please contact the Partners Compliance HelpLine at
http://www.partners.org/complianceline . If the e-mail was sent to you in error
but does not contain patient information, please contact the sender and properly
dispose of the e-mail.

[mafalda couto]

hi Andrea

How did you convert the STL file to a surface mesh? Did you ever try to create a abaqus file (function saveabaqus)?

Thank you in advance
Best regards
Mafalda

[Qianqian Fang]

On 04/16/2014 09:17 AM, mafalda couto wrote:

hi Andrea

How did you convert the STL file to a surface mesh? Did you ever try to create a abaqus file (function saveabaqus)?

hi Mafalda

one way for you to import an STL file is to convert it first
to an OFF file using MeshLab or most CAD/CAM software.
Then you can read in matlab using readoff.

Qianqian

--

You received this message because you are subscribed to the Google Groups "iso2mesh-users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to iso2mesh-user...@googlegroups.com.
To post to this group, send email to iso2mes...@googlegroups.com.
Visit this group at http://groups.google.com/group/iso2mesh-users.

For more options, visit https://groups.google.com/d/optout.

[mafalda couto]

hi Qianqian

Thank you very very much...

Best Regards