Act

Act#

So far, you’ve learned how to create worlds and place actors in them. Now it’s time to bring things to life:

The act() Method#

The act() method controls the behavior of your world and all its actors. It is called once every frame (i.e., every world.step time unit), continuing until the program ends.

First Actor

Example: Moving Actor#

When you create an Actor, you can define its act() method and register it using the @register decorator:

from miniworlds import World, Actor

world = World(500, 500)
world.add_background("images/sky.jpg")

player = Actor((90, 90))
player.add_costume("images/ship.png")

@player.register  # Registers the act method. This is required for it to be called regularly.
def act(self):
    self.y = self.y - 1  # Moves the actor upward along the y-axis

world.run()

Explanation#

  • The act() method moves the player up by one unit on every frame.

  • New here is the use of self, which lets the object refer to itself. So the line self.y = self.y - 1 means the player object is reducing its own y-coordinate by 1.

:::{seealso} For more on methods and how to use self, see here. :::

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