ACSLogo is a Logo interpreter, while Logo is a computer programming language designed for educational purposes. A mechanical turtle is an on-screen cursor that can be given drawing instructions and movement commands so that graphics are obtained.
Complex graphics can be drawn, such as repetitive tiling-type patterns, Peano curves, fractals and space-filling fractals and recursively drawn images. Basically, a turtle's movement will be programmed, turtle which will draw lines as it moves, resulting in complex patterns. The utility consists of two windows, respectively the edit window, for command input, and the graphics screen, where the command results can be viewed. Exports can be made to PNG, TXT, SVG, EPS, PNG, ACSD. Logo can be used to teach simple programming, maths and computer science concepts, through observation of the guided progress of the turtle, as it is an educational language. The "help" menu provides good information related to implementing the Logo language.
ACSLogo is a Logo interpreter designed for Mac OS X and it can be used for creating complex patterns and graphics by use of programming commands.
v1.5 [Apr 18, 2011]
This release requires Leopard (OS X 10.5) or above.
Enhancements
On-screen graphics have been brought into line with the graphics produced when exporting to PDF. This means you get proper 'corners' when drawing a connected series of lines, and most of the performance problems which emerged with Leopard should have gone.
New functions have been added - Wrap returns whether wrap is on or off , Shadow returns the shadow state, ColourAtPoint returns the colour of the pixel at the supplied co-ordinate.
You can now export graphics as JPEGs and PNGs as well as TIFFs and a few other types..
Bug Fixes
The Towards function sometimes gave the wrong angle; this should be fixed. A crash which occurred when opening a tutorial that is already open should be fixed.
Alan Smith
Norwich, UK
May 2011
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