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Turtle graphics are often associated with the Logo programming language. [2] Seymour Papert added support for turtle graphics to Logo in the late 1960s to support his version of the turtle robot, a simple robot controlled from the user's workstation that is designed to carry out the drawing functions assigned to it using a small retractable pen set into or attached to the robot's body.
Hides the turtle and aids viewing a clear drawing on the screen: ht: SHOWTURTLE: ST: Shows the turtle after it is hidden from the screen: st: PENUP: PU: Sets the turtle to move without drawing: pu: PENDOWN: PD: Resets to a drawing pen when ordered to move: pd: CLEARTEXT: CT: Clears all text in the command screen: ct: CIRCLE: Makes a circle
PGF/TikZ is a pair of languages for producing vector graphics (e.g., technical illustrations and drawings) from a geometric/algebraic description, with standard features including the drawing of points, lines, arrows, paths, circles, ellipses and polygons.
The first working Logo turtle robot was created in 1969. A display turtle preceded the physical floor turtle. Modern Logo has not changed very much from the basic concepts predating the first turtle. The first turtle was a tethered floor roamer, not radio-controlled or wireless. At BBN Paul Wexelblat developed a turtle named Irving that had ...
The implementations above always draw only complete octants or circles. To draw only a certain arc from an angle α {\displaystyle \alpha } to an angle β {\displaystyle \beta } , the algorithm needs first to calculate the x {\displaystyle x} and y {\displaystyle y} coordinates of these end points, where it is necessary to resort to ...
Turtlestitch (stylized as TurtleStitch) is a free and open source platform (or web application) for generating and sharing patterns for embroidery machines. Turtlestitch is derived from educational programming languages such as Logo, Scratch and Snap! using the same jigsaw style programming paradigm [2] which offers simplicity suitable for novices but has powerful features, described as ‘low ...
Turtle Geometry is a college-level math text written by Hal Abelson and Andrea diSessa which aims to engage students in exploring mathematical properties visually via a simple programming language to maneuver the icon of a turtle trailing lines across a personal computer display.
Asymptote is also notable for having a graphical interface coded in Python (and the Tk widget set), xasy.py – this allows an inexperienced user to quickly draw up objects and save them as .asy source code which can then be examined or edited by hand. The program's syntax was originally described by using a Yacc compatible grammar.