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Davood-<br>
<br>
There is merit to much of what you propose. Just a couple of notes if
you want to get fancy:<br>
<br>
+ VTK has a higher-order framework that you should be aware of
<a class="moz-txt-link-freetext" href="http://www.vtk.org/pdf/AdaptorFramework.pdf">http://www.vtk.org/pdf/AdaptorFramework.pdf</a>. We have used it to
visualize mixed polynomial order cells (the framework supports any cell
that can be uniquely parameterized). It requires you to write an
adapter, which takes some work.(Remember, Kitware is in the business of
consulting/support if this looks too hard to do yourself).<br>
+ Transparency is always an issue; VTK now supports unstructured grid
volume rendering (requires tetrahedrization first). Look at the file
fire_05_11_08.avi in <a class="moz-txt-link-freetext" href="http://paraview.org/files/data/">http://paraview.org/files/data/</a> if you want to see
an absolutely stunning video clip of fire simulation using VTK's
unstructured grid volume rendering. My understanding is that is was
generated on a 120 distributed processor system.<br>
<br>
(Kudos to the Sandia Nat'l lab folks who contributed much of this
technology to the VTK community.)<br>
<br>
Will<br>
<br>
<br>
Davood Ansari wrote:
<blockquote
cite="middc22725d0611271719n3121b4acu2d5b145a1e5ed470@mail.gmail.com"
type="cite">
<div><span class="gmail_quote">Hi every one</span></div>
<div><span class="gmail_quote"></span> </div>
<div><span class="gmail_quote"></span> </div>
<div><span class="gmail_quote">I have some very high order elements
and I want to visulize the mesh (FEM mesh mesh ).</span></div>
<div><span class="gmail_quote"> Let's assume that my element are </span><span
class="gmail_quote">rectilinear all. Then the problem is that I want
to visulize </span></div>
<div><span class="gmail_quote">them in different ways and in some
cases </span><span class="gmail_quote">I want the nodes (boundary
and/or internal) nodes </span></div>
<div><span class="gmail_quote">to be observavle (as small dots). </span></div>
<div><span class="gmail_quote">Now I guess I should do it </span><span
class="gmail_quote">in the following way. See if I am right in this
regard.</span></div>
<div><span class="gmail_quote"></span> </div>
<div><span class="gmail_quote">1.Make low order elements and make the
faces transparent (is this possible, how?) </span></div>
<div><span class="gmail_quote">2.Then add extra cells to the </span><span
class="gmail_quote">grid. These cells should represent a node each
(including those that fall inside the element). </span></div>
<div><span class="gmail_quote">3.Make the </span><span
class="gmail_quote">faces of the elements transparent to some extent.</span></div>
<div><span class="gmail_quote"></span> </div>
<div><span class="gmail_quote">If this is not right then how can I
realize my high order elements (with their nodes) ?</span></div>
<div><span class="gmail_quote"></span> </div>
<div><span class="gmail_quote"></span> </div>
<div><span class="gmail_quote">I have seen a figure that shows a
delunary trinagulation of random points using vtk. There the grid is
visulized as </span></div>
<div><span class="gmail_quote">nodes (small spheres) connected with
lines (actually pipes). But the example that </span></div>
<div><span class="gmail_quote">mentions the figure in the book uses
the regular vtkUnstructuredGrid. While other exmples</span></div>
<div><span class="gmail_quote">of the unstructured gird are visulized
in a different way (elements have observable faces)?!!</span></div>
<div><span class="gmail_quote">Can we control the way grid cells are
visualized ? Can it be done in a different way from one cell</span></div>
<div><span class="gmail_quote">to another ?</span></div>
<div><span class="gmail_quote"></span> </div>
<div><span class="gmail_quote">Many thanks in advance</span></div>
<span class="sg">
<div><span class="gmail_quote">Davood Ansari O.B.</span></div>
</span>
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