| const CAST_SIZE = 5; |
| function castSlots(actors) { |
| if (actors.length > CAST_SIZE) throw new Error(`This demo uses ${CAST_SIZE} actors. Remove extra actors first; existing actors are not deleted automatically.`); |
| const used = new Set(); |
| for (const actor of actors) if (actor.castSlot !== void 0) { |
| if (!Number.isInteger(actor.castSlot) || actor.castSlot < 1 || actor.castSlot > CAST_SIZE || used.has(actor.castSlot)) throw new Error("Invalid or duplicate actor motion slot"); |
| used.add(actor.castSlot); |
| } |
| return actors.map((actor) => { |
| if (actor.castSlot !== void 0) return { ...actor }; |
| const slot = Array.from({ length: CAST_SIZE }, (_, i) => i + 1).find((i) => !used.has(i)); |
| used.add(slot); |
| return { ...actor, castSlot: slot }; |
| }); |
| } |
| function nextCastSlot(actors) { |
| const used = new Set(castSlots(actors).map((a) => a.castSlot)); |
| return Array.from({ length: CAST_SIZE }, (_, i) => i + 1).find((i) => !used.has(i)) ?? null; |
| } |
| export { |
| CAST_SIZE, |
| castSlots, |
| nextCastSlot |
| }; |
|
|
