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slogo

A development environment that helps users write SLogo programs.

  • Names: Rachel Bransom, Jay Wang, Sam Curtis, Yilun Zhou
  • Date started: October 7th
  • Date finished: November 8th
  • Estimated number of hours: 200
  • Sam and Yiun worked on front end and Jay and Rachel worked on back end
  • Impression: good for buulding team work and trying out new design concepts and tools like reflection.

Resources Used

Files Used

  • No files were used to start the project
  • To test the project we made our own files; FakeDisplayable and FakeTrackable, which have been included

Using the program

  • The terminal works just like the command line
  • Simply type the commands into the terminal
  • You can influence the program by interacting with the GUI (buttons)
  • Clicking on values in the option menu inputs them into the terminal where you can change the command as needed

Bugs

  • We currently have no known bugs

Extensions Implemented

  • Backend: All the extra commands, Save/Load worksapce, Groupinp, Scope, and Recursion.

Command Decisions

  • Tell: Tell [ x ] will set the current turtle who reacts to commands to be x only. For example, tell [ 5 ] will make the turtle with ID 5 the only turtle who reacts to following input commands. Same id, if appearing more than once in tell [], will only be considered once (with the order being its first appearance).

  • If we have multiple turtles, "fd set :x + :x 10" works by evaluating :x once for each turtle, thus each turtle will move different distance. Similarly fd * id :x will move turtles by different distance as well.

  • Grouping: ( fd 10 20 30 40 ) will work as if we do fd 100, and the same is for ( sum 1 2 3 4 ), which will simply add all the numbers.

  • We do not need the DEFINE command, since the orginal procedure already supports recursion perfectly. DEFINE command will result in a syntax error.

Extra Features for the Terminal

  • The user can use toggle switch to change between Enter to Submit and Ctrl-Enter to Submit. Pressing the other key (key combination) will create a new line.

  • The user can use up and down arrow keys to navigate through history (just like a normal terminal). However, navigation won't work when there are more than one lines (because the user is more likely to navigate through lines in multi-line command).