Dear all,
I'm trying to get access to the full geometry of a certain model created using
gmsh. For example, consider the following *.geo file:
Point(1)={0, 0, 0};
Point(2)={1, 0, 0};
Point(3)={0, 1, 0};
Circle(1)={2,1,3};
Line(2)={2,3};
This *.geo file creates a quarter circle and a straight line. When using the
Mesh.SaveTopology option, all entities are saved in the $Entities ...
$EndEntities section:
$Entities
3 2 0 0
1 0 // Point 1
2 0 // Point 2
3 0 // Point 3
1 2 2 3 0 // Line 1 (=circle)
2 2 2 3 0 // Line 2
$EndEntities
As you can see, lines 1 and 2 seem to be identical entities, while in reality
they are not. Line 1 is a quarter circle, while line 2 is a straight line. Is
there a way to export the full geometry/topology information from gmsh at the
moment? Thus, for a circle, this would be three points (the input points
provided to the Circle command). My goal is to use gmsh as a mesh generator and
couple it to an existing MATLAB finite element solver. Extracting the precise
topology from gmsh allows for the easy definition of boundary conditions (e.g.
distributed load on a circular line segment or pressure on a curved surface).
Thanks in advance.
Kind regards,
Pieter Reumers
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