ReplPy

Usage

Just run the main.py with Python 2.7. Since Tk is part of this project, it might be necessary to install that (use pacman -S tk if using Arch Linux).

You can exit the program using Ctrl+C (which doesn't work after opening a turtle window). You have to press Enter after Ctrl+C) or by typing :exit.

The test.scm file contains a few fancy lambda definitions to test the functionality. It also opens a turtle window and moves the turtle 100 forward. Load the file by typing (load "test.scm").

A second file to load was added (courtesy to Mario): (load "dragon.scm"). This opens a turtle window an paints a nice dragon (takes a few seconds).

Build in

The following functionality is currently implemented:

Scheme (according to rsr5)

define
if
cond
lambda
car
cdr
cons

Math

\+
\-
\*
/
<
\>
=
dsin (returns sin of x degree)
rsin (returns sin of x radians)
pi
e

Misc

print
load (loads a file)

Turtle Graphics

This opens a graphic window when calling (tinit w h). w and h are the height and width of the window. The following functions are supported:

texit (close the turtle window)
tforward (move the turtle x forward)
tback (move the turtle x back)
tleft (rotate the turtle x degree to the left)
tright (rotate the turtle x degree to the right)
tcircle (draw a circle with radius x)
tsize (set pen size of the turtle)
tspiral (draw a rainbow spiral with x steps)
tspeed (apparently the turtle is too slow for some people. Use 0 for no animation and 1-10 to speed it up. Default is 6)