[vtkusers] Unstructured Grid .vtk format

[Yogesh Kumar]

Hello guys,

My name is Yogesh. I am doing my master thesis at FAU Erlangen. I have a 
question about unstructured grid. We have a solver and I want to make 
the ouput in the .vtk format in order to visualized the result in paraview.

The input of the solver is GiD based mesh file and output is the stress 
value at Gauss points and position of deformed and undeformed 
coordinates. The input files are 2D structure such as square plate or 
beam. In the preprocessor I am defining the number of elements and the 
mesh type is the quad element with nine nodes.

So in the example of square plate let say I have four elements and each 
element have nine nodes and nine Gauss points. Node points are at the 
boundary of the element and Gauss points are inside of each  element. So 
in this example I have total 25 node points and 36 Gauss points (9*4).  
The stress values are define on Gauss points and deformed and undeformed 
values are define at node points.

So I want to write the node point value and stress point value in vtk 
format. But the problem is that I have 25 nodes values and 36 stress 
value. Because the point data is 25 and I am not able to store all the 
36 points stress values.

Is there is any way that I can write the 25 point_data for nodes and 36 
point_data for Gauss points?

or is there is any other way to store the values in order to see the 
result file in paraview?

An example file will be very helpful.

thanks in advance ..

-Yogesh