export const GetInterval=(min,max,step=10)=>{
    const distance = Math.ceil(max) - Math.floor(min)
    console.log(distance);
    let s = (distance / step);
    console.log(s);
    if (s > 5){
      s = Math.ceil(s / 5)  *5;
      return s;
    }else{
      return Math.ceil(s)
    }
}
  
// WGS84 转 GCJ-02
export function wgs84ToGcj02(lng, lat) {
  if (outOfChina(lng, lat)) {
    return [lng, lat];
  }
  
  let dlat = transformLat(lng - 105.0, lat - 35.0);
  let dlng = transformLng(lng - 105.0, lat - 35.0);
  
  const radlat = lat / 180.0 * Math.PI;
  let magic = Math.sin(radlat);
  magic = 1 - 0.00669342162296594323 * magic * magic;
  const sqrtmagic = Math.sqrt(magic);
  
  dlat = (dlat * 180.0) / ((6378245.0 * (1 - 0.00669342162296594323)) / (magic * sqrtmagic) * Math.PI);
  dlng = (dlng * 180.0) / (6378245.0 / sqrtmagic * Math.cos(radlat) * Math.PI);
  
  const mglat = lat + dlat;
  const mglng = lng + dlng;
  
  return [mglng, mglat];
}

// 判断是否在中国境内
function outOfChina(lng, lat) {
  return (lng < 72.004 || lng > 137.8347) || (lat < 0.8293 || lat > 55.8271);
}

function transformLat(x, y) {
  let ret = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y + 0.2 * Math.sqrt(Math.abs(x));
  ret += (20.0 * Math.sin(6.0 * x * Math.PI) + 20.0 * Math.sin(2.0 * x * Math.PI)) * 2.0 / 3.0;
  ret += (20.0 * Math.sin(y * Math.PI) + 40.0 * Math.sin(y / 3.0 * Math.PI)) * 2.0 / 3.0;
  ret += (160.0 * Math.sin(y / 12.0 * Math.PI) + 320 * Math.sin(y * Math.PI / 30.0)) * 2.0 / 3.0;
  return ret;
}

function transformLng(x, y) {
  let ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1 * Math.sqrt(Math.abs(x));
  ret += (20.0 * Math.sin(6.0 * x * Math.PI) + 20.0 * Math.sin(2.0 * x * Math.PI)) * 2.0 / 3.0;
  ret += (20.0 * Math.sin(x * Math.PI) + 40.0 * Math.sin(x / 3.0 * Math.PI)) * 2.0 / 3.0;
  ret += (150.0 * Math.sin(x / 12.0 * Math.PI) + 300.0 * Math.sin(x / 30.0 * Math.PI)) * 2.0 / 3.0;
  return ret;
}