Demo: The demo involves a bat in a dark cave. With the mouse, the player can control the bat's flight.

• Assets: There are two 16x16px sprite images of the bat - one with wings up and one with wings down.

• Code:

  • The Bat class wraps the bat's functionality. It has attributes like x, y, frame, and methods like swap_wings and draw.

  • The App class initializes the game, loads assets, and contains the main loop with update and draw methods. In different versions of the code:

    • In the first version, the bat flaps its wings every 10 frames and can be quit by hitting the Q key.
    • In the second version, clicking the left mouse button moves the bat to the cursor position, and if the button is held, the bat follows the mouse.
    • In the third version, the bat flies towards the click position using math (Euclidean distance and trigonometry) to compute the path. Vectors and steps use real numbers, and screen positions use natural numbers, causing rounding issues. The vector is adjusted to use the center of the sprite.