Jason, I would like to work in this realm in this year's GSoC.
I went through Sahil Shekhewat's and James Milam's (jbm950) previous unmerged GSoC work and found out that(I may be wrong) *FeatherStoneMethod *can't be added until we add fully working *JointsMethod* class and implement *spatial vectors*. I would like to implement *Spatial Vectors* in this year's GSoC and would like to discuss it further. Sudeep Sidhu > On Sun, Feb 7, 2021 at 2:24 PM Jason Moore <moore...@gmail.com> wrote: > >> Sudeep, >> >> The topics related to sympy.physics.vector/mechanics are still >> possibilities. I will have time to mentor this summer if someone wants to >> do projects in this realm. >> >> We have not updated the ideas page yet for this year so those could be >> adjusted. Off the top of my head here are some things that I think are >> priorities: >> >> - Finish and enhance the work of Sahil Shekhewat so that models can be >> built with body and joint specifications (unmerged GSOC work). >> - Finish and enhance the work of James Milam (jbm950) that adds a >> FeatherstoneMethod. This is one way to increase the computational >> efficiency. One thing that is missing are nice implementations of spatial >> vectors and their operators. >> - Finish and enhance the work of Nikhil Pappu. The Autolev parser needs >> to be battle tested on some examples and bugs worked out. We need the tests >> in the private gitlab repo to actually be run by SymPy. (merged, but not >> polished GSOC work). >> - The Linearizer class was updated by James Crist, but I think it is >> effectively broken for more complex problems. This needs to be fixed and we >> need examples of it working for systems with holonomic and nonholonomic >> constraints. >> - Improve symbolic computational speed. Hard examples need to be profiled >> and the Python implementations improved, work on the core differentiation >> algorithms to maximize speed, and ensure that optional dependencies on >> symengine function and help for hard problems. >> - Develop a more comprehensive set of examples. I've started creating >> more and migrating threse to the PyDy documentation: >> https://pydy.readthedocs.io/en/latest/#examples. One barrier to user >> adoption is the lack of examples that are clearly written that cover all >> types of dynamic systems. >> - I've recently discovered that for some problems the resulting symbolic >> equations are in a form that results in numerical error accumulation in the >> arithmetic. This is problematic and figuring out what this issue is and >> remedying it would be a nice improvement. >> - All of these PRs are hanging: >> https://github.com/sympy/sympy/pulls?q=is%3Aopen+is%3Apr+label%3Aphysics.mechanics >> >> and it would be nice to resolve them and get them merged. >> - If work can be done on PyDy, as has in the past, there are several >> things there too 1) support DAEs, 2) improve the visualizer in a number of >> ways, 3) migrate examples to jupyter-sphinx, etc. >> >> At this point, I'm generally in disfavor of proposing any new features or >> extensions to the library over fixing and improving what we already have. >> As you can see, we have several GSoC projects that were not fully polished >> off or were not merged at all. >> >> Jason >> moorepants.info >> +01 530-601-9791 <(530)%20601-9791> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "sympy" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to sympy+un...@googlegroups.com. >> > To view this discussion on the web visit >> https://groups.google.com/d/msgid/sympy/CAP7f1AgguJTXrTiNpZVS-oe9-jT8BjeSqRiJRPCmbhj4mC4b5A%40mail.gmail.com >> >> <https://groups.google.com/d/msgid/sympy/CAP7f1AgguJTXrTiNpZVS-oe9-jT8BjeSqRiJRPCmbhj4mC4b5A%40mail.gmail.com?utm_medium=email&utm_source=footer> >> . >> > -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sympy+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/46e97251-1908-4bc4-af73-20faba189babn%40googlegroups.com.
