This is the readme that goes with the logo class from Rene Kluwen <email@example.com>. This class is an implementation of a Logo interpreter (parser and graphical output). The whole thing consists of one single PHP class. License: LGPL. See: http://www.gnu.org/copyleft/lesser.html. Parsing is mostly done using regular expressions. Arithmetic functionality is 'borrowed' from PHP, using the eval() function. Output needs SWF support in your PHP version. Logo resume: ** ** The basic Logo commands: ** ** FD 100 Move the turtle forward 100 steps. ** RT 90 Turn the turtle to the right 90º. ** LT 90 Turn the turtle to the left 90º. ** BK 100 Move the turtle backwards 100 steps. ** PU Pick the turtle's pen up off the paper. ** PD Put the turtles pen back down on the paper. ** CS Clear the screen and start over. ** HT Hide the turtle (triangle). ** ST Show the turtle (triangle). ** REPEAT 3 [...] Repeat the commands 3 times. ** MAKE "var value Set variabele var to value ** TO wordname :par1 :par2 ... Wordname is a new word with par1, par2... as parameters ** Todo: implement some music commands. Todo: Conditional execution (IF), Local variables, more commands (such as POLY, SETXY, etc.).