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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