Function tryMove

examples/dungeon-crawl/main.ts:219–283

(dx: number, dy: number)

}

function tryMove(dx: number, dy: number): void {
  const nx = player.x + dx;
  const ny = player.y + dy;

  if (tileAt(nx, ny) === TILE_WALL) return;

  const ei = enemyAt(nx, ny);
  if (ei >= 0) {
    // Attack enemy
    const dmg = randomInt(player.attack - 1, player.attack + 1);
    enemies[ei].hp = enemies[ei].hp - dmg;
    if (enemies[ei].hp <= 0) {
      enemies[ei].active = false;
      showMessage("Defeated " + enemies[ei].name + "!");
    } else {
      showMessage("Hit " + enemies[ei].name + " for " + dmg.toString() + " damage");
    }
  } else {
    player.x = nx;
    player.y = ny;
  }

  // Check stairs
  if (tileAt(player.x, player.y) === TILE_STAIRS) {
    floor = floor + 1;
    generateDungeon();
    showMessage("Descended to floor " + floor.toString());
    computeVisibility();
    return;
  }

  // Enemy turns
  for (let i = 0; i < enemies.length; i++) {
    if (!enemies[i].active) continue;
    const edx = player.x - enemies[i].x;
    const edy = player.y - enemies[i].y;
    const dist = Math.abs(edx) + Math.abs(edy);

    if (dist <= 1) {
      // Attack player
      const dmg = randomInt(enemies[i].attack - 1, enemies[i].attack + 1);
      player.hp = player.hp - dmg;
      showMessage(enemies[i].name + " hits you for " + dmg.toString() + "!");
    } else if (dist <= FOV_RADIUS && isVisible(enemies[i].x, enemies[i].y)) {
      // Move toward player
      let mx = 0;
      let my = 0;
      if (Math.abs(edx) > Math.abs(edy)) {
        mx = edx > 0 ? 1 : -1;
      } else {
        my = edy > 0 ? 1 : -1;
      }
      const enx = enemies[i].x + mx;
      const eny = enemies[i].y + my;
      if (tileAt(enx, eny) !== TILE_WALL && enemyAt(enx, eny) < 0 &&
          !(enx === player.x && eny === player.y)) {
        enemies[i].x = enx;
        enemies[i].y = eny;