1,009
edits
Changes
Jump to navigation
Jump to search
Line 3:
Line 3: − + − + − + − + + + + + + + + + + + + + + + + + + + + + + + + +
Activities/Turtle Art/Tutorials/Turtle Art Code for Turing Machine (view source)
Revision as of 21:18, 29 June 2011
, 21:18, 29 June 2011Headings; images to come
In progress.
In progress.
* Start is the main procedure
* The Start action is the main procedure
* Setup defines and initializes variables, and sets the orientation of the turtle
* The Setup action defines and initializes variables, and sets the orientation of the turtle
* Tape writes the initial tape. User can change values in repeat statements to change arguments.
* The Tape action writes the initial tape. User can change values in repeat statements to change arguments.
* Program writes the program table
* The Program action followed by the stack1 action writes the program table line by line. This is divided in two so that the segments fit in the Turtle Art workspace
* The Execute action carries out the next program step until the halt state is reached
* The ToTape action Move turtle to current cell on tape
* The ToProgram action Move Turtle to beginning of current program row to execute
* The WriteCell action Write current color to current cell, and move to next cell
* The WriteSymbol action Write current color in cell without moving
* The ReadPixel action Read RGB values of pixel to stack, pop to variables
* The SetValue action Find value of cell symbol from RGB numbers
* The SetMove action Read next Move direction from program table
* The SetSymbol action Read next Symbol to write from program table
* The SetState action Read next State from program table
* The NewCell action Move left or right and set cell number of new location
* The Log action Write Step number, Symbol, Move, State, Cell number on new log line in black, saving and restoring