A script parser, script generator, command interpreter and visualizer for turtle graphics. It can read from a file or generate commands on-the-fly. Requires PyGame if you want to run it from source.

Massively optimized rendering to support 1000 unique turtles moving on the screen at once!

The program is capable of generating random TurtleScript files with a specified number of actions. The program ensures that the turtle does not leave the confines of the screen.

Endless random mode!

Just a demonstration of a turtle drawing my name onto the screen.

The TurtleScript code for the above drawing.

TurtleScript is a name that I just made up for a scripting language meant for controlling turtles (little nasties that algorithmically make a mess on the screen).

The idea for this program came from a book called "The Pragmatic Programmer" by Andrew Hunt and David Thomas (page 63 exercise 5)

The exercise just states that you must implement a parser for the scripting language- but, of course, I couldn't just stop there.

This program supports 3 colours FULL COLOUR RANGE, navigation in four FULL 360 DEGREES directions, and pen up/down commands. You could draw anything from your wildest imagination.

Place your TurtleScript files in the same directory as the main program. Upon execution, the program will ask you to input the name of a TurtleScript file. Once you have done so, the program will begin drawing your beautiful artistic masterpiece on the very screen before your eyes :D

There are also other modes to choose from, such as:

• Perform all TurtleScript files in the current directory simultaneously
• Save a new finite and random TurtleScript file (of user-specified length) in the current directory and then perform it
• Endless random mode!

P : Clear the screen

Most TurtleScript commands come in the form of an uppercase letter, followed by a space, followed by a number.

Example: "N 12"

Some commands do not take an argument, so for them you would just type the uppercase letter.

Example: "D"

The parser supports comments, but only at the end of the line.

Example: "N 4 # this is a comment"

The "P" command sets the colour, and takes RGB values in this form: "P 255 255 255"

The following TurtleScript code will draw a hollow square on screen.

# start of file
P 255 0 0    # select red pen
D       # pen down
W 5     # go west (left) 5 positions
N 5     # go north (up) 5 positions
E 5     # go east (right) 5 positions
S 5     # go south (down) 5 positions
U       # pen up
# end of file