About

LOGOSX is a logo writer, or turtle graphics, program for Mac OSX. I created it to learn how to develop programs for the mac, but i figured that people might enjoy a turtle graphics program. I'm still working on it, so expect new versions to come out, and if you have and sugestions let me know @ micah@stealthiscode.com

To download the installer, click here or on the download link on the left.

If you are a developer check out the section below for the source.

To view you the user submission page click on the art link on the left

HowTo

You can do some fun stuff with it and i'll give a breif description of how to use it but if you want to learn more about logo and turtle graphics please read the history section below.

There are two was to use LOGOSX, the simpler way is these text fields and the forward button.

The second and more powerful option is the command line interface.

To use the simple version, just enter a length, then enter how much of an angle you want the turtle to turn and press forward. The turtle will draw a line for you. To draw the next line simply enter a new length or how much more you want to turtle to turn and press forward again.

To use the command line interface you must first learn the commands. They are:
F = forward
L = left
R = right
U = pen up
D = pen down
and [ ] are for repeats

Heres how it works. To draw a straigt line of 100 units type F100 and press GO (or hit enter). Now to draw a line at and angle type R45F100 and press GO. You can draw the same two lines in one step by entering F100R45F100 and pressing GO. U or "pen up" is to move with out drawing a line. D or "pen down" is to start drawing lines again. For example F50UF50DF50 would draw two lines of length 50, seperated by a space of length 50. You can also repeat commands by sorrunding it in brackets like so [F50R90]4 . The number after the brackets is how many times to repeat (this example draws a square). The rest you can figure out for yourselves.

History

Logo was aparently first developed in 1967 @ Bolt, Beranek and Newman, a technology company started in the 40's by two MIT professors, as an educational programming language. However Seymour Papert, a early supporter of using computers for education, seems to be the father of logo. Logo became popular in the 80's when versions of turtle graphics programs were released for the Apple II and the Texas Instruments TI 99/4, along with the publication of Seymour Papert's book Mindstorms: Children, Computers and Powerful Ideas, which has also inspired a line of toys, LEGO Mindstorms. Since then logo has been used by teachers and children all over the world,including myself, as a way to incorporate technology and learning.
Click here for more info about logo.

Download

You can download the LOGOSX installer here. To install simply drag to logosx icon into your applications folder.

Developer

To download a tar of the current source code click here

Or click here if you want to view the source online.