Workshop › Pinball › Step 6 of 42

Draw the ball

What we are doing

Now we draw the ball wherever ball says: a filled circle of radius R.

```js
ctx.fillStyle = '#e7e5e4'
ctx.beginPath()
ctx.arc(ball.x, ball.y, R, 0, Math.PI * 2)
ctx.fill()
```

What it means

• arc(x, y, r, start, end) plans a circle around (x, y) with radius r, from angle start to end.
• Angles are in radians: Math.PI * 2 is a full turn, so this is a whole circle.
• fill() fills the planned shape with fillStyle.

Your turn

Inside draw, after the for loop that draws the walls, write the four lines.

Skills: Drawing on a canvas

← A ball in the lane Move by the velocity →

All steps

1. Paint the table
2. Draw one wall
3. A list of walls
4. The game loop
5. A ball in the lane
6. Draw the ball
7. Move by the velocity
8. Launch with Space
9. Gravity
10. Does the ball touch a wall?
11. Push the ball out
12. Bounce off the wall
13. Small steps and a speed limit
14. Ready or playing
15. The next ball
16. Three bumpers
17. The ball meets a bumper
18. A bumper kicks
19. A score and a fresh start
20. Points for every hit
21. Remember which bumper was hit
22. Light it up
23. Lit for a moment, points once
24. Two flippers
25. Where is the tip?
26. Flippers stop the ball
27. Which keys are held?
28. Which way to turn
29. Flip!
30. A moving wall
31. The flipper throws
32. Three balls
33. Balls left and game over
34. Play again
35. Remember the best score
36. Launch on letting go
37. Pull the spring
38. Show the spring
39. Two thumbs
40. Pull with a finger
41. Tap to play again
42. Build it yourself: slingshots