Workshop › Missile Command-style Defense › Step 32 of 35

Some missiles will split

What we are doing

From wave 3, one missile in four is marked to split. Here we only set the mark; the splitting comes next.

```js
let incoming // enemy missiles: { sx, sy, x, y, tx, ty, speed, split }

  const split = wave >= 3 && Math.random() < 0.25

  incoming.push({ sx, sy, x: sx, y: sy, tx, ty: GROUND, speed: 0.5 + wave * 0.15, split })
```

What it means

• wave >= 3 && Math.random() < 0.25 is true from wave 3, one time in four on average.
• split is stored in the missile ({ split } is split: split). The comment lists the new field.

Your turn

1. Add , split to the field list in the let incoming comment.
2. In launch, under the const tx line, write the split line.
3. Add , split at the end of the object in the push line.

Skills: Game states

← Launch from anywhere Split into three →

All steps

1. Six cities to protect
2. Your missile base
3. Draw again and again
4. Cities that can fall
5. Rubble
6. Move towards a point
7. Launch an enemy missile
8. One missile a second
9. Missiles on their way
10. Smoke trails
11. Impact
12. Fire an interceptor
13. Click the sky
14. Interceptors fly
15. An explosion that grows and shrinks
16. Explode on arrival
17. Draw the explosions
18. Impacts explode too
19. Caught in the blast
20. Chain reactions
21. Only your explosions count
22. Points for every missile
23. Show the score
24. Limited ammo
25. Waves
26. Each wave is harder
27. The end of a wave
28. The end
29. Play again
30. Wave, ammo and messages
31. Launch from anywhere
32. Some missiles will split
33. Split into three
34. A high score
35. Build it yourself: a crosshair