Workshop › Lunar Lander › Step 28 of 31

Burst into pieces

What we are doing

A crash that only prints "Crashed" is a letdown. The lander should burst into 24 pieces flying out in random directions.

```js
let debris

  debris = []

  // A burst of pieces flying out from the wreck.
  for (let i = 0; i < 24; i++) {
    const a = Math.random() * Math.PI * 2
    const speed = 1 + Math.random() * 3
    debris.push({ x: lander.x, y: lander.y, vx: Math.cos(a) * speed, vy: Math.sin(a) * speed - 2, life: 60 })
  }
```

What it means

• a is a random direction: any angle in a full turn. speed is from 1 to 4.
• cos and sin turn the direction and speed into vx and vy; - 2 nudges every piece upward.
• Each piece lives 60 frames (one second).

Your turn

1. Under let state ... write let debris.
2. In startLevel, under state = 'flying', write debris = [].
3. In touchdown, under state = 'crashed', write the comment and the for loop.

Skills: Velocity and gravity, Arrays and objects

← A high score Pieces fall and fade →

All steps

1. Random hills
2. Draw the hills
3. A landing pad
4. The height at any x
5. The lander
6. Draw it around its own middle
7. Two feet
8. The game loop
9. Moon gravity
10. Around the sides
11. Flying or not
12. Touching the ground
13. Remember held keys
14. Tilt
15. The engine
16. A flickering flame
17. Fuel
18. Touch controls
19. Landing or crashing
20. Fly again
21. Landed or crashed?
22. Readouts
23. Levels
24. Score
25. Next level or new game
26. A narrower pad
27. A high score
28. Burst into pieces
29. Pieces fall and fade
30. Draw the wreck
31. Build it yourself: wind