User:Sharan.nyn/GSoC18/Log

Development Logs

Community Bonding Period

Due to my semester end exams (Apr 26 - May 17), my time spent during community bonding period was less but I still managed to do the following:

• Week 1
  • Prepared a flowchart to understand how the execution of the rtcheck program works : rtcheck_flow
  • Was introduced to 'gdb' which helped me a lot to analyze the flow.
  • Understood how the front-end portions of rt and back-end portions are connected by linking the view*.c files
• Week 2
  • Read the documentation to understand the RTUIF API : https://brlcad.org/wiki/Developing_applications
  • Understood the origins of libanalyze functions.
  • Discussed some ideas on how to implement the libanalyze function, all were bad ideas because they all involved calling the rtcheck program using execvp() as they usually end with exit().
  • Was suggested a basic plan on how to proceed.
  • Understood how libanalyze functions were used by an example : libged/voxelize.c and libanalyze/voxels.c
• Week 3
  • Complied a version of the rtcheck program by just copying the relevant files to libanalyze/overlaps/.
  • Discussed the plan related to rtcheck in detail.
  • Understood the concept of using contexts and callback functions.
  • Tried out callback functions, implementing a basic callback function that alters an int.

Week 1

• 14/05/18
  • trying to build a new rtcheck command by stripping down the non-necessary parts of the front-end, so that the code is easier to understand.
  • discussed a lot of issues with mentor.
• 15/05/18
  • started working on the design of the libanalyze function
  • all parts of rt/main.c and do_ae() done
• 16/05/18
  • added do_frame(), do_run() and grid_setup() added.
• 17/05/18
  • added worker() and do_pixel()
  • used a worker_context to pass data to worker using the void pointer for bu_parallel
  • when I ran the command I was getting segfault at rt_gettrees, thought I'd fix it next day
• 18/05/18
  • figured out the problem but it meant moving a lot content to libanalyze
  • I did it anyway out of curiosity and it fixed the problem with rt_gettrees still it crashed at rt_shootray!
  • At the end of the day after a lot of debugging and trials, found out that rt_shootray was calling the hit sequence of gqa :O, not sure why.
  • A quick rename of the hit sequence of libanalyze to check_hit solved the problem.
  • Still need to figure out how to call rt_gettrees without moving all function calls to libanalyze.
• 19/05/18
  • Didn't do much today, just added code to fill the overlap list passed through callback data.