Workshop › Bomberman-style Arena › Step 13 of 42

Drop a bomb

What we are doing

A bomb is a tile and a fuse: how many frames until it goes off. dropBomb puts one on the tile the player stands on. The player may be between two tiles, so tileOf rounds to the nearest one.

```js
const FUSE = 150 // frames until a bomb goes off

let bombs // { r, c, fuse }

  bombs = []

const tileOf = (m) => ({ r: Math.round(m.y), c: Math.round(m.x) })

function dropBomb() {
  const t = tileOf(player)
  bombs.push({ r: t.r, c: t.c, fuse: FUSE })
}
```

What it means

Math.round rounds to the nearest whole number: 2.4 → 2, 2.6 → 3. So tileOf gives the tile a mover stands on.
({ ... }) returns an object from a short function; without the brackets { would start a function body.
dropBomb adds { r, c, fuse } to bombs.

Your turn

Above DIRS write FUSE.
Above let held write let bombs; in reset, above held = [], write bombs = [].
Under walkable write tileOf.
Above function update() { write dropBomb.

Skills: Game states

← Walk Space drops, bombs show →

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