Workshop › Flappy-style Bird › Step 13 of 30

A pipe as data

What we are doing

A pipe pair is one small object: its x, and gapY, where the opening starts. The screen will hold several pipes, so they live in an array, pipes. For now it holds one test pipe.

```js
const PIPE_WIDTH = 60
const GAP = 160

let pipes = [{ x: 250, gapY: 200 }]
```

What it means

• PIPE_WIDTH is how wide a pipe is, GAP how tall the opening is.
• [ ... ] is an array; this one holds one pipe object. pipes[0] is the first item (counting starts at 0).

Your turn

1. Under the FLAP line, write PIPE_WIDTH and GAP.
2. Under the bird line, write pipes. Press Run.

Skills: Arrays and objects, Game states

← Tell the player Draw the pipes →

All steps

1. Get the canvas and the pen
2. Paint the sky
3. Draw the bird
4. A function that draws
5. A function that moves
6. The game loop
7. Gravity
8. A flap
9. Space, Up arrow or a tap
10. Wait for the first flap
11. The ground and the sky
12. Tell the player
13. A pipe as data
14. Draw the pipes
15. The world moves, not the bird
16. A new pipe at a random height
17. A pipe every 90 frames
18. Remove the pipes you passed
19. Is the bird level with a pipe?
20. Through the opening
21. Score each pipe once
22. Show the score
23. A function for a fresh start
24. Try again
25. One place where the game ends
26. Remember the best score
27. Show the best score
28. The same speed on every screen
29. No catching up after a pause
30. Build it yourself: a medal