[Gmsh] 3D mesh from surfaces defined as points

[David Bernstein]

Hi Jack, I'm assuming the points which define the top surface are not already on a simple surface like a plane or a sphere.  I guess your problem is that you have to define a surface which contains the points and let gmsh know what the surface is.  One way to do this is to create a triangulation of the point set and then define lines, line loops, and surfaces from the triangles and then create a surface loop out of all the triangles.  However, I don't know of an algorithm that will create a triangulation of a set of points in 3D in such a way that it makes a sensible surface (I'm not an expert in this area though) so you might have to do the initial triangulation manually.

Regards,
Dave


On Aug 22, 2013, at 12:11 PM, Jack Stalnaker <jack.stalnaker at gmail.com> wrote:

> (Apologies. I hit send before completing the email before)
> 
> I have a 3D body defined as follows:
> 
>      - bottom, front, back, and sides are flat
>      - top is defined by a set of points in 3D
> 
> How do I go about creating a 3D unstructured mesh from this body using Gmsh? The top surface is the problem. It is only defined as points. Do I need to define lines and line loops from these points in order to create a mesh? Is there some standard way to do this in Gmsh, like a built in tool? 
> 
> Thanks,
> Jack
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