A turtle graphics implementation for R7RS Scheme

Jason K. MacDuffie 750793d369 fix a bug in circle 1 anno fa
client 8c49cbb436 remove debug code 1 anno fa
examples 33f46f2e95 correct threeshapes 7 anni fa
server 3088d08556 make gauche server look closer to kawas 1 anno fa
.gitignore 49c39a8d2f write a quick library for kawa turtle 7 anni fa
LICENSE ee9eb19ace I never set the license apparently! This is GPLv3+ 9 anni fa
README.md 65a0cb16a3 update readme 4 anni fa
canvas.gauche-tk.scm 6dba309d33 add dummy code for gauche tk to handle multiple canvases 4 anni fa
canvas.gauche-web.scm 33dae72746 define procedure called wait a moment 4 anni fa
canvas.guile-web.scm 2cd8d0af6e add guile-web client 4 anni fa
canvas.kawa-web.scm 33dae72746 define procedure called wait a moment 4 anni fa
canvas.sld 6b918a45fb make guile primary 4 anni fa
physics.sld 86df361c51 move physics up 4 anni fa
screenshot.png 8a9eb5c631 Add a screenshot 9 anni fa
simple.sld 750793d369 fix a bug in circle 1 anno fa
syntax.sld b2a3919002 Add a max-recur syntax 2 anni fa
turtle3.body.scm 40db935231 fix bug in face! 1 anno fa
turtle3.sld 59ebb1564d add correct implementation of face! 2 anni fa
vector.sld 4ac687fba1 add vector-angle 1 anno fa
web-client.scm c72c6972fb remove any default commands 4 anni fa

README.md

Turtle R7RS

This library is for turtle graphics implemented in R7RS Scheme. Because there is no portable way to implement graphics, the code was made modular enough to have multiple front-ends. For Gauche, gauche-tk is used. For Kawa, the built-in HTTP server is used to send instructions to a browser front-end.

There is also effort to unify the use of the web front-end for multiple implementations.

YASOS is a dependency to allow extending the turtle.

Screenshot

Here is a picture of the "dragon" curve.

dragon curve

License

You may redistribute or modify this library under the terms of the GNU GPLv3, or any later version. See LICENSE for details.