Turtle and graphics Logo (programming language)

logo s most-known feature turtle (derived robot of same name), on-screen cursor showed output commands movement , small retractable pen, producing line graphics. has traditionally been displayed either triangle or turtle icon (though can represented icon). turtle graphics added logo language seymour papert in late 1960s support papert s version of turtle robot, simple robot controlled user s workstation designed carry out drawing functions assigned using small retractable pen set or attached robot s body.

as practical matter, use of turtle geometry instead of more traditional model mimics actual movement logic of turtle robot. turtle moves commands relative own position, left 90 means spin left 90 degrees. logo implementations, particularly allow use of concurrency , multiple turtles, support collision detection , allow user redefine appearance of turtle cursor, allowing logo turtles function sprites.

multiple turtles supported mswlogo, 3d graphics. input com ports , lpt ports allowed mswlogo through windows gui. interrupts can triggered via keyboard , mouse events. simple gif animations may produced on mswlogo version 6.5 gifsave command.

turtle geometry used in environments other logo alternative strictly coordinate-addressed graphics system. instance, idea of turtle graphics useful in lindenmayer system generating fractals.