GSoC Midterm Report (Week 7)

Week 7 of GSoC is over, which means I am now in the 'second half' of the coding period. The midterms were conducted by Google from 29th to 2nd, and I am happy to report I passed them :-).

As I had predicted in my last blog post, this week wasn't very exciting, atleast as far as the project is concerned. I am now at Goa, and classes have started. However, I did get a few things done - The Dyadic framework is now almost complete, with all the classes functioning as expected (from point of view of dyadic operations). I also added all the special operations like cross, dot, express and time-differentiation. For now, just like last week, they use SymPy Symbols for temporary working.

Moreover, I finished writing all the tests for my first PR. Gilbert reviewed them, and I made a few changes (mostly API-wise).
I also tested my MovingRefFrame implementation of vector time-derivatives on my hacked mechanics module, and I am happy that it worked fine. Thus, I now have the proof-of-concept for all the work I have done so far.

I have also submitted a PR to get the logic module docs into the online development documentation, but I am quite sure I am going wrong somewhere. I have pinged Aaron, and I hope it gets solved by the end of this week.

To sum up my work till now, this is what I got done-

1) MovingRefFrame class - The basic class to represent moving reference frames in 3-D space. Inherits from the CoordSysRect class of the new vector module.

2) Particle class - Class to represent particles (mass but no volume) in space. Each particle is associated with a frame of its own, and all it's parameters are calculated wrt it.

3) Miscellaneous mechanics functions like the ones to obtain position vector given a time-dependent vector and boundary conditions.

4) Dyadic framework - Classes Dyadic, BaseDyadic, DyadicAdd, DyadicMul. All these classes are based on relevant SymPy core classes and build dyadic-based functionality on top of them.

Currently, I am reading Griffith's book (very helpful suggestion from Aditya - my collegemate) and taking notes for the EM module. Since the development of the new mechanics core is now nearing completion, I can focus time on working on the new addition to sympy.physics.

Hence, the coming week will be spent on polishing off the mechanics work, making sure all required parts are in place, maybe helping Prasoon with some functions of vector fields (so that he can concentrate on vector-space integration).
Plus, I have to design the vector-dyadic interfacing. Basically, how dyadics will be instantiated from vector 'outer' functions. Obviously, having a dyadic framework is useless without fitting it to the vector module.
And last but not the least, I plan to code the electrostatic functions for the EM sub-module by this weekend. Hope I succeed.

Have a great week :-)