Workshop › Pool › Step 18 of 33

Six pockets

What we are doing

A pool table has six pockets: the four corners and the middle of each long side. Each pocket is a pair of numbers [x, y], drawn as a dark circle.

```js
const POCKETS = [
  [LEFT, TOP], [240, TOP], [RIGHT, TOP],
  [LEFT, BOTTOM], [240, BOTTOM], [RIGHT, BOTTOM],
]
const POCKET_R = 15

  for (const [px, py] of POCKETS) {
    ctx.fillStyle = '#020617'
    ctx.beginPath()
    ctx.arc(px, py, POCKET_R, 0, Math.PI * 2)
    ctx.fill()
  }
```

What it means

• POCKETS is an array of six [x, y] pairs: the corners of the felt and x = 240 on the top and bottom edges.
• for (const [px, py] of POCKETS) takes each pair apart into px and py.

Your turn

1. Under COLORS write POCKETS and POCKET_R.
2. In draw, right under the felt's fillRect, write the pocket loop.

Skills: Drawing on a canvas, Arrays and objects

← Swap the push In the pocket →

All steps

1. The room
2. The table
3. The cue ball
4. Draw the balls
5. The rack
6. Numbers on the balls
7. An aim line
8. Turn the aim
9. A shot is a velocity
10. Roll
11. Friction
12. Cushions
13. Aiming and rolling
14. Hide the aim while rolling
15. Count the shots
16. Balls that touch
17. Swap the push
18. Six pockets
19. In the pocket
20. Scratch
21. Balls left
22. Clear the table
23. Choose the power
24. A power bar
25. A slingshot
26. Press to aim
27. Pull back and let go
28. Smaller steps
29. Predict the hit
30. Draw the ghost ball
31. Where the hit ball goes
32. Your best
33. Build it yourself: two players