boardgame-core/src/core/part.ts

import {RNG} from "@/utils/rng";

export type Part = {
  id: string;

  sides?: number;
  side?: number;

  alignments?: string[];
  alignment?: string;
  regionId: string;
  position: number[];
}

export function flip(part: Part) {
  if(!part.sides) return;
  part.side = ((part.side || 0) + 1) % part.sides;
}

export function flipTo(part: Part, side: number) {
  if(!part.sides || side >= part.sides) return;
  part.side = side;
}

export function roll(part: Part, rng: RNG) {
  if(!part.sides) return;
  part.side = rng.nextInt(part.sides);
}