Workshop › Angry Birds-style Slingshot › Step 43 of 47

Start any level

What we are doing

startLevel(n) builds level n and does everything reset did except the score, so the score can carry on from level to level. reset now only zeroes the score and starts level 0.

```js
let level

function startLevel(n) {
  level = n
  bodies = LEVELS[n].map(([kind, x, y, w, h]) => body(kind, x, y, w, h))
  bird = null
  birdsLeft = 3
  aim = { angle: -0.6, pull: 50 }
  dragging = false
  state = 'aiming'
  calm = 0
}

function reset() {
  score = 0
  startLevel(0)
}
```

What it means

startLevel(n) takes a parameter: the number of the level to build, used as LEVELS[n].
It is the old reset without score = 0, plus level = n.
reset sets the score to 0 and calls startLevel(0).

Your turn

Under let dragging write let level.
Turn reset into startLevel(n) as shown (add level = n, use LEVELS[n], remove score = 0), and write the new reset under it.

Skills: Functions, Game states

← Three levels of data On to the next level →

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