Wednesday, December 30, 2009
Wednesday, November 18, 2009
Tuesday, November 17, 2009
save as EPS to include into Latex.
Surprise: Matlab has an awful bounding box space around the figure.
You want to autocrop it but its a vector graphics format,
so you can't use mogrify -trim +repage <filename> as you would normally
do with an image.
Solution: epstool. It does an autocrop for the EPS file:
epstool --copy --bbox input.eps output.eps
and your final plot will still look crisp.
Another option: save as PDF in matlab. Then use ImageMagick's convert to convert it to eps:
convert file.pdf file.eps
this will keep the vector graphics intact (at least in recent versions of ImageMagick).
Of course, you can always use pdflatex instead and avoid EPS altogether.
Friday, October 02, 2009
Thursday, August 13, 2009
Friday, May 29, 2009
geometry of two and three views.
When you press any key, you can drag the 3D point around and sense how
the geometry changes.
Thursday, May 14, 2009
Tuesday, May 12, 2009
Monday, April 20, 2009
Friday, March 13, 2009
Thursday, March 05, 2009
Wednesday, February 11, 2009
The simplest thing that worked out of the box was a utility called recordMyDesktop:
Easy to install & use, at least in Gentoo. The way I used it was simple:
recordmydesktop -x X_pos -y Y_pos -width WIDTH -height HEIGHT -o foo.ogv
play it with
Mplayer/Mencoder can also be used to convert it to any other video format if you want, e.g. to AVI:
mencoder -idx input.ogv -ovc lavc -lavcopts vcodec=mjpeg -oac mp3lame -o output.avi
I also need to generate an animated GIF. Here's how:
mplayer input.ogv -vo gif89a:output=output.gif:fps=5 -vf crop=850:562:17:99 -frames 999
If you use the input from the OGV file (not AVI), the quality will likely be better.
You can nonlinearly edit the video by opening the GIF in GIMP and deleting the frames you don't want as layers, then saving it. If you want to alter the speed, make sure you set this during the export and make sure you check the box that tells GIMP to override the default frame delays. You can also use GIMP to crop your video further.
To play your GIF animation, just open it in firefox or any browser.