Controlling Visibility and Appearance

Introduction:

  • Welcome to BlockPyArt, where programming meets creativity by drawing shapes and patterns. This tutorial focuses on controlling the visibility and appearance of the turtle (block). Remember: Always use the “start” block to activate the BlockPyArt console. If you do not start with the start block, you will encounter an error and the commands will not work properly.

Visibility and Appearance Commands

  1. shape(shape_name):
    • Purpose: Sets the shape of the turtle.

    • Example:

      python
      turtle.shape("turtle")  # string
turtle.shape("arrow")
turtle.shape("circle")
    • Exercise: Change the turtle's shape to "square", "triangle", and "classic".
  2. showturtle():
    • Purpose: Makes the turtle visible on the screen.

    • Example:

      python
      turtle.showturtle()
    • Exercise: Ensure the turtle is visible at the start of your program.
  3. hideturtle():
    • Purpose: Makes the turtle invisible on the screen.

    • Example:

      python
      turtle.hideturtle()
    • Exercise: Hide the turtle after drawing a shape.
  4. isvisible():
    • Purpose: Checks if the turtle is currently visible.

    • Example:

      python
      visibility = turtle.isvisible()
print(visibility)
    • Exercise: Check if the turtle is visible before and after hiding it.

Examples

  1. Toggle Visibility:

    • Example:

      python
      turtle.showturtle()  # Ensure turtle is visible
turtle.forward(100)
turtle.hideturtle()  # Hide turtle after drawing
  2. Check Visibility Status:

    • Example:

      python
      turtle.showturtle()
visibility = turtle.isvisible()
print("Turtle is visible:", visibility)

turtle.hideturtle()
visibility = turtle.isvisible()
print("Turtle is visible:", visibility)
  3. Change Shape and Move:

    • Example:

      python
      turtle.shape("circle")
turtle.showturtle()
turtle.forward(100)
turtle.shape("arrow")
turtle.right(90)
turtle.forward(50)

Exercises

  1. Draw a Shape and Hide Turtle:

    • Write a program to draw a square and hide the turtle afterward.

      python
      turtle.showturtle()
for _ in range(4):
    turtle.forward(100)
    turtle.right(90)
turtle.hideturtle()
  2. Visibility Check:

    • Write a program to check if the turtle is visible before and after drawing a line.

      python
      turtle.showturtle()
print("Visible before drawing:", turtle.isvisible())
turtle.forward(100)
turtle.hideturtle()
print("Visible after drawing:", turtle.isvisible())
  3. Shape and Visibility Pattern:

    • Write a program to change the turtle's shape, move it, and toggle visibility.

      python
      turtle.shape("turtle")
turtle.showturtle()
turtle.forward(50)
turtle.shape("triangle")
turtle.right(120)
turtle.forward(50)
turtle.hideturtle()
turtle.shape("circle")
turtle.showturtle()
turtle.forward(50)

Summary:

  • In this tutorial, we learned how to control the visibility and appearance of the turtle in BlockPyArt using the commands shape(), showturtle(), hideturtle(), and isvisible(). Remember to always use the start block to activate the BlockPyArt console. If you cannot start using the BlockPyArt blocks, there will be an error. Practice these commands and exercises to get comfortable with customizing and controlling the visibility of the turtle in BlockPyArt!