Function moveSimulator

frontend/src/App.tsx:910–943

(direction: SimDirection)

  }

  function moveSimulator(direction: SimDirection) {
    if (!challenge) {
      setSimMessage("当前挑战还没有加载完成。");
      return;
    }
    const current = simPosition || {
      lat: challenge.center_lat,
      lng: challenge.center_lng,
    };
    if (!simPosition) {
      resetSimulator();
    }
    const step = Math.max(1, Math.min(500, Math.round(simStepM || 30)));
    const next = moveByMeters(current, direction, step, mapRotationDeg);
    const nextCellId = safeLatLngToCell(next.lat, next.lng, challenge.h3_resolution);
    const inside = Boolean(nextCellId && cellIdSet.has(nextCellId));
    setGpsPosition(null);
    setGpsCellId(null);
    setSimPosition(next);
    if (inside) {
      setSimMine((prev) => new Set(prev).add(nextCellId));
    }
    const directionText =
      direction === "north"
        ? "北"
        : direction === "south"
          ? "南"
          : direction === "west"
            ? "西"
            : "东";
    setSimMessage(
      `已向${directionText}移动约 ${step} 米，${inside ? "已进入挑战格。" : "当前位置在挑战范围外，不点亮。"}`
    );
  }

  async function shareChallenge() {
    if (!challenge) return;