JavaScript - Google Maps API：調整路線距離

Question

我正在創建一個騎車網站，目的是讓用戶輸入開始和結束以及距離，以創建距離的路線。這是我到目前爲止有：

http://kellyd52.000webhostapp.com/hexTestTest.html

（^^使用當前的位置和距離看最好的例子）

截至目前，我可以通過增加兩個找一個大概距離航點，並使路線看起來像一個半六角形（這通常會提供距離所需的5/10公里內）。現在，我需要稍微調整這些路標，以便路線的距離更加精確。這是我使用的是做到這一點的功能：

function adjustHex(diff, total) 
{ 
    var diffMetres = diff * 500; //distance to compute and offset point 
    var nearest = total; 
    var eightPoints = [-135,-90,-45,0,45,90,135,180]; //compass bearings 

    var workOffOne = wayptsLatLngs[0]; //first waypoint of the hexagon 
    var workOffTwo = wayptsLatLngs[1]; // second waypoint of the hexagon 

    var tempPoint1; 
    var tempPoint2; 

    var bool; //boolean 

    for (var i = 0; i <eightPoints.length; i++) 
    { 
    for (var j = 0; j <eightPoints.length; j++) //double nested loop to find 8 different points around each waypoint 
    { 

     tempPoint1 = new google.maps.geometry.spherical.computeOffset(workOffOne, diffMetres, eightPoints[i]); 

     tempPoint2 = new google.maps.geometry.spherical.computeOffset(workOffTwo, diffMetres, eightPoints[j]); 

     checkThisHex(tempPoint1, tempPoint2,2,function(current) { 
     //checkThisHex checks the distance using the temp waypoints, returns the distance 

     bool = compareHex(current, nearest); // returns true if that distance is nearer to the user's distance, than the previous distance 

     if (bool == true) 
     { 
      document.getElementById("printInfo3").innerHTML = current; 
      //^prints the new distance -> This works, it always prints a distance that is nearer 

      nearest = current; 
      fillWaypts(tempPoint1, tempPoint2); 
      //fills the waypts array, which can be accessed by any function -> Used for the directionsService.route 
     } 
     }); 
    } 
    } 
    return 
} 

不起作用爲fillWaypts，即使我用它的另一個功能，它完美的作品的一部分。以上操作的代碼如下：

function fillWaypts(first, second) 
{ 
    wayptsLatLngs = []; 
    waypts = []; 
    wayptsLatLngs[0] = first; 
    wayptsLatLngs[1] = second; 
    waypts.push({ 
    location: first, 
    stopover: false 
    }); 
    waypts.push({ 
    location: second, 
    stopover: false 
    }); 
    return 
} 

是否有任何理由，爲什麼tempPoint1和tempPoint2可能不會得到正確發送到fillWaypts？

Answer 1

google.maps.geometry.spherical.computeOffset不是構造函數。您不應該使用新的關鍵字與此