export const MAP_W = 172;
export const MAP_H = 122;
export const CELL_SIZE = 6;

export const SIZE = MAP_W * MAP_H;
export const INF = 1e9;

export function indexOf(x, y) {
  return y * MAP_W + x;
}

export function xyOf(i) {
  return [i % MAP_W, Math.floor(i / MAP_W)];
}

export function inside(x, y) {
  return x >= 0 && y >= 0 && x < MAP_W && y < MAP_H;
}

export function clamp(v, a = 0, b = 1) {
  return Math.max(a, Math.min(b, v));
}

export function nearMapEdge(x, y, margin = 1) {
  return x < margin || y < margin || x >= MAP_W - margin || y >= MAP_H - margin;
}