Turtle graphics GudangMovies21 Rebahinxxi LK21

      In computer graphics, turtle graphics are vector graphics using a relative cursor (the "turtle") upon a Cartesian plane (x and y axis). Turtle graphics is a key feature of the Logo programming language.


      Overview



      The turtle has three attributes: a location, an orientation (or direction), and a pen. The pen, too, has attributes: color, width, and on/off state (also called down and up).
      The turtle moves with commands that are relative to its own position, such as "move forward 10 spaces" and "turn left 90 degrees". The pen carried by the turtle can also be controlled, by enabling it, setting its color, or setting its width. A student could understand (and predict and reason about) the turtle's motion by imagining what they would do if they were the turtle. Seymour Papert called this "body syntonic" reasoning.
      A full turtle graphics system requires control flow, procedures, and recursion: many turtle drawing programs fall short. From these building blocks one can build more complex shapes like squares, triangles, circles and other composite figures. The idea of turtle graphics, for example is useful in a Lindenmayer system for generating fractals.
      Turtle geometry is also sometimes used in graphics environments as an alternative to a strictly coordinate-addressed graphics system.


      History


      Turtle graphics are often associated with the Logo programming language. 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. Turtle geometry works somewhat differently from (x,y) addressed Cartesian geometry, being primarily vector-based (i.e. relative direction and distance from a starting point) in comparison to coordinate-addressed systems such as bitmaps or raster graphics. As a practical matter, the use of turtle geometry instead of a more traditional model mimics the actual movement logic of the turtle robot. The turtle is traditionally and most often represented pictorially either as a triangle or a turtle icon (though it can be represented by any icon).
      Today, the Python programming language's standard library includes a Turtle graphics module. Like its Logo predecessor, the Python implementation of turtle allows programmers to control one or more turtles in a two-dimensional space. Since the standard Python syntax, control flow, and data structures can be used alongside the turtle module, turtle has become a popular way for programmers learning Python to familiarize themselves with the basics of the language.


      Extension to three dimensions



      The ideas behind turtle graphics can be extended to include three-dimensional space. This is achieved by using one of several different coordinate models. A common setup is cartesian-rotational as with the original 2D turtle: an additional "up" vector (normal vector) is defined to choose the plane the turtle's 2D "forward" vector rotates in; the "up" vector itself also rotates around the "forward" vector. In effect, the turtle has two different heading angles, one within the plane and the other determining the plane's angle. Usually changing the plane's angle does not move the turtle, in line with the traditional setup.
      Verhoeff 2010 implements the two vector approach; a roll command is used to rotate the "up" vector around the "forward" vector. The article proceeds to develop an algebraic theory to prove geometric properties from syntactic properties of the underlying turtle programs. One of the insights is that a dive command is really a shorthand of a turn-roll-turn sequence.
      Cheloniidae Turtle Graphics is a 3D turtle library for Java. It has a bank command (same as roll) and a pitch command (same as dive) in the "Rotational Cartesian Turtle". Other coordinate models, including non-Euclidean geometry, are allowed but not included.


      See also



      KTurtle
      L-system
      UCBLogo
      NetLogo
      FMSLogo
      MSWLogo
      Joy (programming language)


      References




      Further reading


      Papert, Seymour (1993). Mindstorms: Children, Computers, and Powerful Ideas (2nd ed.). New York: Basic Books. ISBN 0-465-04674-6. OCLC 794964988.
      Papert, Seymour (1993). The Children's Machine: Rethinking School in the Age of the Computer. New York: Basic Books. ISBN 0-465-01830-0. OCLC 248428992.

    Kata Kunci Pencarian:

    turtle graphicsturtle graphics pythonturtle graphics onlineturtle graphics downloadturtle graphics libraryturtle graphics javaturtle graphics shapesturtle graphics python examplesturtle graphics in python codeturtle graphics python documentation
    Turtle Graphics – Curri Designs

    Turtle Graphics – Curri Designs

    Qingkai

    Qingkai's Blog: Turtle graphics

    Download Turtle Graphics 1.0.0 Alpha

    Download Turtle Graphics 1.0.0 Alpha

    Turtle graphics · Luxor

    Turtle graphics · Luxor

    Top 5 Awesome Python Turtle Graphics – allinpython.com

    Top 5 Awesome Python Turtle Graphics – allinpython.com

    Turtle Graphic by Pertiwis · Creative Fabrica

    Turtle Graphic by Pertiwis · Creative Fabrica

    Turtle Graphic by Mahak Arts · Creative Fabrica

    Turtle Graphic by Mahak Arts · Creative Fabrica

    Turtle Graphic by Mahak Arts · Creative Fabrica

    Turtle Graphic by Mahak Arts · Creative Fabrica

    Turtle Graphic by Design Creativega · Creative Fabrica

    Turtle Graphic by Design Creativega · Creative Fabrica

    Turtle Graphic by Mahak Arts · Creative Fabrica

    Turtle Graphic by Mahak Arts · Creative Fabrica

    Turtle Graphic by Colourful · Creative Fabrica

    Turtle Graphic by Colourful · Creative Fabrica

    Turtle Graphic by My Artsa · Creative Fabrica

    Turtle Graphic by My Artsa · Creative Fabrica

    Search Results

    turtle graphics

    Daftar Isi

    Solved 23. Turtle Graphics: Modular Snowman Write a program

    Turtle Graphics: Modular Snowman Write a program that uses turtle graphics to display a snowman, similar to the one shown in Figure 5-30. In addition to a main function, the program should also have the following functions: ase This fncion should draw the base of the snowman, which is the large snow drawMidSection.

    Solved 23. Turtle Graphics: Modular Snowman Write a program

    Question: 23. Turtle Graphics: Modular Snowman Write a program that uses turtle graphics to display a snown uses turtle graphics to display a snowman, similar to the one shown in Figure 5-30. In addition to a main function, the program shou ddition to a main function, the program should also have the following functions: • drawBase.

    23. Turtle Graphics: Modular Snowman Write a program - Chegg

    Question: 23. Turtle Graphics: Modular Snowman Write a program that uses turtle graphics to display a snowman, similar to the one shown in Figure 5-30. In addition to a main function, the program should also have the following functions: • drawBase.

    Solved 19. Turtle Graphics: Hit the Target Modification - Chegg

    Turtle Graphics: Hit the Target Modification Enhance the hit_the_target.py program that you saw in Program 3-9 so that, when the projectile misses the target, it displays hints to the user indicating whether the angle and/or the force value should be increased or decreased.

    Solved Write a Python program using the Turtle Graphics to - Chegg

    Question: Write a Python program using the Turtle Graphics to draw the concentric circles as described below: the radius of the inner circle is 50, and the radius of the outer circle is 100. the two circles should be filled with different colors (as shown in the screenshot). no straight line should be drawn between two circles (no movement track). the turtle (cursor)

    Solved 6.23 (Turtle Graphics) The Logo language made the - Chegg

    6.23 (Turtle Graphics) The Logo language made the concept of turtle graphics famous. Imagine a mechanical turtle that walks around the room under the control of a C program. The turtle holds a pen in one of two positions, up or down.

    Solved Turtle Graphics: Modular Snowman A "snowman" figure

    Turtle Graphics: Modular Snowman A "snowman" figure consisting of small, medium, and large circles stacked vertically; small circles for "eyes"; lines for "mouth" and "arms"; and two stacked, shaded rectangles for a "hat." Instructions Create a program that uses turtle graphics to display a snowman, similar to the one shown below.

    Solved 18. Turtle Graphics: Hypnotic PatternUse a loop with

    Use a loop with the turtle graphics library to draw the design shown in Figure 4-140. Figure 4-14 Star pattern 18. Turtle Graphics: Hypnotic Pattern Use a loop with the turtle graphics library to draw the design shown in Figure 4-159 Figure 4-15 Hypnotic pattern 18.

    Solved 17. Turtle Graphics: Star Pattern Use a loop with - Chegg

    Use a loop with the turtle graphics library to draw the design shown in Figure 4-14. 19. Turtle Graphics: STOP sign. In this chapter, you saw an example of a loop that draws an octagon. Write a program that uses the loop to draw an octagon with the word “STOP” displayed in its center. The STOP sign should be centered in the graphics window.

    Solved Programming exercise. Number 25. Turtle Graphics

    Question: Programming exercise. Number 25. Turtle Graphics: Checkerboard Write a turtle graphics program that uses the square function presented in this chapter, along with a loop (or loops) to draw the checkerboard pattern shown in Figure 5-32.