Hello everyone,
I save my FEM results as VTK files, these files include data such as Points, Variables values, mesh type etc.
I have been trying to get a vector graphic (like SVG) to display smooth and nice results.
I tried ParaView, but I think they do not support vector graphics in recent versions.
I also tried to write a Python code for this purpose using vtk and matplotlib libraries. It works almost fine, but when I want to plot the mesh too, there are problems.
I used Triangulation from matplotlib.tri, but it only supports triangles mesh, while my mesh type is 9-node quadrilaterals.
So, the question is, what is the best way to get SVG image of a VTK file?
Thanks,
Masoud
pyvista can export svg files
https://docs.pyvista.org/version/stable/api/plotting/_autosummary/pyvista.Plotter.save_graphic.html
I would recommend using svg only for 2D results with discrete colormap. Otherwise there are gradients for which svg is not very efficient.
Edit:
For 2D, you could also use Matplotlib, you just probably need to split 9-node quadrilaterals to triangles. Getting data from VTK files might be tricky, but you could use meshio library for that. I found related question with answers using Matplotlib approach on Stack Overflow.
meshio: https://github.com/nschloe/meshio
SO: https://stackoverflow.com/questions/52202014/how-can-i-plot-2d-fem-results-using-matplotlib
Klaus Sautter
Thanks for your reply.
I have tried Pyvista. Unfortunately, even though the output is in SVG format, the contours are not vector-based.
Tomáš Létal
Thanks for the reply.
Yes, that is a good point, my intention is also to display them as discrete colourmaps.
you won't find such thing and that's for a reason. vector images can become huge for even small models. you are better off using high res pixel based images
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