[Gmsh] 2D mesh error message
artemiev.mikhail at gmail.com
Fri Jan 16 16:02:14 CET 2015
I was able to build the meshes for all these 3 files and RandomFactor=1e-6:
10K on Linux Mint 64bit, gmsh 2.8.5
50K on Linux Mint 64bit, gmsh 2.8.5
100K on Mac OS X 64bit, gmsh 2.8.4 (but I think it will work on Linux as
On 01/16/2015 01:11 AM, Yao-Cheng Tien wrote:
> Hi Mikhail,
> I have attached three more testcases. I have tried to embed 10k, 50k,
> and 100k lines(with length 1) to a surface separately. The element
> size is 1.
> The issue is that the 2d mesh(meshAdapt) works for 10k and 50k after
> setting the Mesh.RandomFactor to 1e-6. However, the 100k one fails
> even when I increase the Mesh.RandomFactor to 1e-4. The error message
> is "Identical points in triangulation: increase element size or
> My questions are:
> 1. Is there any limit about the number of embedded lines? 100k
> embedded lines are too much?
> 2. Any setting I missed to make it work?
> Thank you!
> On Thu, Jan 15, 2015 at 8:59 AM, Yao-Cheng <yaocheng2010 at gmail.com
> <mailto:yaocheng2010 at gmail.com>> wrote:
> Hi Mikhaul,
> My mistake. I'm trying different settings to fix that actually.
> The original geo file indeed has lc=1 but still fails. I have also
> tried lc=0.1 0.5.
> I know it's ok if I have only 1 line or even 10k lines. But in my
> situation, I probably need to have up to 1 million lines. Any
> Thank you.
> > On Jan 15, 2015, at 6:26 AM, Mikhail Artemyev
> <artemiev.mikhail at gmail.com <mailto:artemiev.mikhail at gmail.com>>
> > Hi,
> > Your lines have length 1, while the characteristic length of the
> mesh you defined was 10.
> > What happens if you set lc = 1?
> > With only one line embedded it works fine for me (and
> RandomFactor=1e-8), but I didn't try for all 50K of them.
> > Best,
> > Mikhail
> >> On 01/15/2015 02:29 AM, gmsh-request at ace20.montefiore.ulg.ac.be
> <mailto:gmsh-request at ace20.montefiore.ulg.ac.be> wrote:
> >> Hi,
> >> I have encountered the issue "*Identical points in
> triangulation: increase
> >> element size or Mesh.RandomFactor*" in my 2D geometry file.
> After looking
> >> into previous support mails, I changed the Mesh.RandomFactor to
> 1e-8, 1e-7
> >> until 1e-2. However, it still fails. Could you tell me what
> other option I
> >> should try since I am pretty new to Gmsh?
> >> My geometry is simple. I have a surface with size 1100 by 210.
> Also, there
> >> are 50K lines with length 1 embedded in that surface.
> >> Thanks for your help in advance!
> >> Best,
> >> YC
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