[Paraview] PV for Mesh Generation

[Bryn Lloyd]

You can do the following:

1. start with original surface (original triangles), with N nodes

2. extrude by a certain distance: you get a new surface (new triangles)

3. the extrusion simply adds corresponding nodes for each original  
node, so a node with id k has a corresponding node with id N+k.

4. connect triangle i in original triangles with triangle i in new  
triangles. Make a prism for each triangle.

5. convert all prisms to tetrahedra using "triangulate"


Most of the code necessary for this can be found here (steps 1-4, 5 is  
already in paraview):
http://www.vision.ee.ethz.ch/~blloyd/Extrusion/

-Bryn




On Feb 13, 2009, at 5:32 PM, Randall Hand wrote:

> I have a 2D Triangulated mesh that a user wants extruded into a 3D  
> Shape for use in simulation work.
>
> I tried using the "Linear Extrusion" filter, but that only gets the  
> outer edges.  What I really need to do is extrude the triangles into  
> 3D Triangulate Prisms (5-sided solids, 2 triangles & 3 quads).  Is  
> there any way to do this?
>
> I tried doing:
> Dataset
>  |- Extract Surface - Linear Extrusion
>  |- Extract Edges - Linear Extrusion
> Append both Together - Clean
>
> That's close, but I have a collection of 2D Primitives, and lose all  
> the interior volume.
>
> --
> Randall Hand
> Visualization Scientist, DAAC
> http://www.yeraze.com
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