Mesh generator and Finite Element Solver

I was reading some papers at Universia, and I've found this one which references the Gmsh, a apparently simple mesh generator with an simple integrated CAD. It also has screencasts showing how to use it.
Gmsh was is developed by the professor Christophe Geuzaine for academic uses. I didn't read much, but Gmsh is apparently scriptable and the CAD tool is realy simple to use. I was planning to develop something very similar. Another cool thing at the professor's site is the project GL2PS, which the main idea, on convert OpenGL rendering in PS, PDF and SVG, I was also thinking in.
Professor Geyzaine had also written an finite element solver, the GetDP.
I am planning to use them all on some grad school works.
Another code on Finite Element Analysis is the SLFFEA, which stands for San Le's Free Finite Element Analysis, deserves note and is entierly written in Ansi C.

Comments

More trickery with gnuplot dumb terminal

In my post " Plotting memory usage on console " the chart doesn't pan the data. Now, using a named pipe, the effect got a little bit nicer. First, we have to run the memUsage.sh script to get a file filled with memory usage info: ./memUsage.sh > memUsage.dat & Then we have to create a named pipe: mkfifo pipe Now we have to run another process to tail only the last 64 lines from the memUsage.dat while [ 1 ]; do tail -64 memUsage.dat> pipe; done & And now we just have to plot the data from the pipe: watch -n 1 'gnuplot -e "set terminal dumb;p \"pipe\" with lines"' And that is it!

Replace transparency in PNG images with white background (for lots of files...)

I had to remove transparency from a PNG image file from the command line... and stack overflow came into my help[1]... But I needed it for lots of files... then, adding a "while read line" did the job: ls -1 *.png | cut -d . -f 1 | while read line; do convert -flatten $line.png flatten/$line.png ; done; [1] Replace transparency in PNG images with white background https://stackoverflow.com/questions/2322750/replace-transparency-in-png-images-with-white-background

Pettry rendered LaTeX equations using PHP

When I was writing a simple scientific webapp, during my undergrads studies, I needed to generate some equations to be shown by the app. I was already familiar with LaTeX equation formatting syntax, so I decided to use this nice peace of software. So, after "googling" a little, I found the imgtex , written by Koji Nakamaru , which is a fast CGI script, written in perl. What I did, was port it to PHP. To run it, you must have a LaTeX distribution and the dvipng software both installed on the same machine which you will run the PHP script. Here is the PHP code: To use this code, you just have to pass the LaTeX commands through GET to the PHP. For example, adding the following string to your URL: http://localhost/imgtex.php?res=300&cmd=x=\frac{-b\pm\sqrt{-4ac}}{2a} The res variable sets the resolution for the generated image and the cmd specifies the LaTeX command. This way, the above URL will produce the following image:

FilipiVianna

Search This Blog