Anton's Research Ramblings

3 September 2012.

3d Maths Cheat Sheet

After failing to correctly remember some vector/angle conversion formula and going back to re-read my own lecture slides (this happens all the time...) I decided that it was time to write a look-up cheat sheet for these things;

A set of commonly used 3d maths and linear algebra formulae for those like me - with a brain that tends to delete this stuff from memory immediately. Click image for .pdf.

3d camera vis

I have to switch back to working on buildings again soon, so my tie-it-up plan for the 3d camera visualisation is:

• switch from 2d particles to 3d meshes (or maybe resize the particles with z) for the faces so that you can see the depth
• detect nods (y) and shakes (x) of heads and derive the frequency and amplitude. then I can say "if f > some threshold then head is nodding 'Yes'".
• print out these tracking stats either in text or with some sort of real-time graph
• clean up the camera feed and track the face positions so that the characters are never mixed up
• write up a technical report as a workshop style "this is how you visualise 3d data with webgl, and this is how hard it is to do" sort of thing.