Workshop › Bomberman-style Arena › Step 30 of 42

Enemies wander

What we are doing

Enemies move like the player, from tile to tile with a target and moveTo, only slower. On each tile they list the ways they can go and pick one at random.

```js
const ENEMY_SPEED = 0.05

function updateEnemy(e) {
  if (!e.target) {
    const options = Object.values(DIRS).filter(([dr, dc]) => walkable(e.y + dr, e.x + dc))
    if (options.length === 0) return
    e.dir = options[Math.floor(Math.random() * options.length)]
    e.target = { r: e.y + e.dir[0], c: e.x + e.dir[1] }
  }
  moveTo(e, ENEMY_SPEED)
}

  for (const e of enemies) updateEnemy(e)
```

What it means

options keeps the four directions whose next tile is walkable; with none, the enemy waits.
Math.floor(Math.random() * options.length) is a random index: Math.floor rounds down, so 0 to length − 1.
The chosen way becomes e.dir and the next tile the target.

Your turn

Under SPEED write ENEMY_SPEED.
Above function hurt() { write updateEnemy.
In update, under updatePlayer(), write the enemies line.

Skills: Game states

← Enemies No turning back →

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