First devlog! It’s quite simple but it took kind of a while due to having to polish it alot.

• I first made a simple bird sprite that will be getting remade later.
• I made the Bird class, which is a subclass of pygame.sprite.Sprite. It has a flap_y_delta, which is how much the bird moves upwards when it flaps, and tracks a velocity variable that is either negative or positive and it is added to the y-coordinate of the sprite. In the update method I add the gravity, which is 1200 pixels per second, to the velocity. It also has a flap() method which sets the velocity to the flap_y_delta. The flap_y_delta is negative (-400) because Pygame’s y-axis goes downwards as it increases. Instead of handling user input for the bird in its update() method, I do it in the main event loop and just run bird.flap() because I need to only allow one press of space per keypress. This stops the user from holding the space bar to repeatedly go upwards, but it’s still spammable.
  • The bird also has rotation. This was quite simple. First, in the __init__() method, I have an original image, and then the image attribute is just a copy of the original. Then, in the draw() method, I rotate the original image and set it to the image variable, which is what gets drawn to the screen. The angle is calculated by min(90, self.velocity * 0.1), because the velocity will be very high when it is falling so it will default to 90 degrees when falling, and it is a negative value when the bird is going upwards.
• I made a floor sprite. Later on I put a red line on it to make sure it is repeating correctly. It will be remade later on.
• The floor was quite easy to make. Basically I make a Floor class as if it was a normal sprite, and the update method does 2 things: first, it’s going to move it leftwards by a set speed (200 px/s); and then it’s going to check if it has moved fully to the left of the view (self.rect.right <= 0), in which case it’s going to set its x-value to its width times 2 (self.rect.x += self.rect.width * 2), making it wrap to the right outside of the screen. In the main game class I make a sprite group of 2 floors, the second being offset by its own width to make it start to the right. This makes the floor scroll smoothly and infinitely.

It’s coming along really well!