User:Vikram Atreya/GSoC21/Log

Development Logs

Community Bonding Period

• Forked github repo and compiled working version of BRL-CAD
• Made the pages for project plan and dev logs
• Ideated various ways to implement undo and set constraints

Weekly update - Coding Period

• Week - 1
  • Day 1-2
    • Working version of undo command implemented in mged which prints name of database when command is given.
    • Understood how commands use wrapper functions and function of cmd_ged_plain_wrapper()
    • Set flags -n and -h aimed to execute multiple undos and show usage respectively
    • Understood how hidden objects work, have to explore temporary file alternative to save backup objects
    • Stuck, trying to iterate over all objects in database but not finding the right function
    • Finally found way to iterate over all objects from move_all.c
    • Converted undo.c to undo.cpp so that code can be more functional
  • Day 3-4
    • Had a discussion with my mentor how to proceed further on the undo
    • Data accesible over all processes stored in _GLOBAL as name, value pairs
    • Name of the last added object and last killed object stored in _GLOBAL
    • Wrappers of make and kill modified to add the labels
    • Introduced 3 variables in undo.cpp to keep track of latest_change and then take necessary action to undo
  • Day 5-6
    • Enabled undo for in command; Now working to enable undo for killall
    • Did tutorials to understand how combinations and regions work
    • Went in the wrong direction intially; Took a day to understand how combinations are stored
• Week - 2
  • Day 1-2
    • Encountered many bugs while implementing undo for killall
    • Ubuntu had some problems; mouse and keyboard stopped working and stopped work for sometime
    • Tired refactoring code of backup storage for make; Chose to make a gmd_cmd for it but did not happen, also felt it was not the best option
    • Succesfully implemented undo for kill by modifying code in libged/killrefs; Might have to write a new wrapper for this
    • Created new wrapper for g (group) command and implemeted undo for it; Some refinement left here
  • Day 3-4
    • Refined code of g cmd undo and updated PR
    • Attempt at reefactoring code to libged/undo.cpp failed; Not right place to put the code
    • Refactored make's undo code into mged/utility1.c and replaced code in make, in and g
    • Solved major bug that made children objects disappear when any object was killed
    • logic: renamed all leaves by adding sufffix, thereby poiting to imaginary objects and not hiding the references it had previously
  • Day 5-6
    • Implemented undo for mv and mvall
    • Also restructured code in undo.cpp to accommodate more cmds easily
    • Made a spreadsheet with status of implementation for all commands

• Week - 3
  • Day 1-2
    • Solved a long pending bug
  • Day 3-4
    • Took a break
  • Day 5-6
    • Started work on storing objects as data in binary objects
    • Understood code of mk_binunif, make and libged/bo.c

• Week - 4
  • Day 1-2
    • Done writing basic test to store and recover objects from a binary object
    • Stored internal data in binary object, storing external data is better since it contains type information as well
    • Switched code from storing internal to external of object
  • Day 3-4
    • Ideated and tried different ways in which we could store the recovery data
    • Wrote code implementing a new struct in ged/defines.h
    • Mimicked history implementation for the struct
  • Day 5-6
    • Implemented undo using the struct but realized it would not work
    • Thought of using char** arrays to store the commands
    • Have to discuss with mentor on a better approach