CPSC120A
Fundamentals of Computer Science

Sprites

• One other example of mutability, sprites

• I also created a module to make doing some of common things with the graphics module easier

  import graphics
  import sprite
  
  a_sprite = sprite.Sprite(0, 0, 'sprite.gif')
  
  while graphics.window_open():
      graphics.clear()
  
      graphics.draw_sprite(a_sprite)
  
      graphics.wait()

• Similar to the turtle module, you create sprite objects
• The graphics module can draw a sprite
• Note, the location of the sprite is an attribute of the sprite

• You can change the attributes of a sprite using the dot notation

  a_sprite.y += 1

• Sprites are mutable, which means that functions can modify them

• This makes it much easier to organize you code

  def update_sprite(a_sprite):
      a_sprite.y += 1

• Also have useful methods for testing for and handling collision

  if a_sprite.collides(b_sprite):
      a_sprite.speed_y = 0
      a_sprite.uncollide(b_sprite)

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