【发布时间】：2014-06-02 13:27:42
【问题描述】：
我想比较使用高速公路和避开高速公路时的距离，但我不知道该怎么做。我的代码是计算两点之间的距离和基于距离的价格。如果高速公路复选框被选中，它应该计算不同的价格，但是当没有高速公路时，价格应该保持不变。
这是代码
var directionsDisplay = new google.maps.DirectionsRenderer();
var directionsService = new google.maps.DirectionsService();
var map;
function initialize() {
var myOptions = {
center: new google.maps.LatLng(43.521573, 16.441015),
zoom: 5,
mapTypeID: google.maps.MapTypeId.ROADMAP
};
map = new google.maps.Map(document.getElementById('map-canvas'), myOptions);
directionsDisplay.setMap(map);
google.maps.event.trigger(map, 'resize');
}
function calcRoute() {
var start = document.getElementById('start').value;
var end = document.getElementById('end').value;
var vehicle = document.getElementById('vehicle').value;
//var highway = document.getElementById('highway').checked;
//var round = document.getElementById('return').checked;
var distanceInput = document.getElementById('distance');
var timeInput = document.getElementById('time');
var priceInput = document.getElementById('price');
var request, price;
if (document.getElementById('highway').checked) {
request = {
origin: start,
destination: end,
travelMode: google.maps.TravelMode.DRIVING,
avoidHighways: false
};
} else {
request = {
origin: start,
destination: end,
travelMode: google.maps.TravelMode.DRIVING,
avoidHighways: true
};
}
directionsService.route(request, function(response, status) {
if (status == google.maps.DirectionsStatus.OK) {
directionsDisplay.setDirections(response);
if (document.getElementById('highway').checked)
dist_highway = response.routes[0].legs[0].distance.value / 1000;
else
dist = response.routes[0].legs[0].distance.value / 1000;
distanceInput.value = response.routes[0].legs[0].distance.value / 1000;
var hours = parseInt( response.routes[0].legs[0].duration.value / 3600) % 24;
var minutes = parseInt( response.routes[0].legs[0].duration.value / 60) % 60;
timeInput.value = hours + "h " + minutes + "m";
if (vehicle == 'van') {
if ((response.routes[0].legs[0].distance.value / 1000) < '30' ) {
price = (response.routes[0].legs[0].distance.value / 1000) * 1.19;
} else {
price = (response.routes[0].legs[0].distance.value / 1000) * 0.93;
}
} else if (vehicle == 'personal') {
if ((response.routes[0].legs[0].distance.value / 1000) < '30' ) {
price = (response.routes[0].legs[0].distance.value / 1000) * 1.32;
} else {
price = (response.routes[0].legs[0].distance.value / 1000) * 1.06;
}
}
if (document.getElementById('highway').checked && vehicle == 'personal' ) {
price *= 1.3;
} else if (document.getElementById('highway').checked && vehicle == 'van' ) {
price *= 1.5;
};
if (document.getElementById('return').checked) {
price *= 1.7;
};
priceInput.value = price.toFixed(2) + "€";
}
});
}
google.maps.event.addDomListener(window, 'load', initialize);
经过 AlexB 的解释，这是我的功能。问题解决了。
function calcDist(start, end) {
var requestHighway, request, distHighway, dist;
var dirService = new google.maps.DirectionsService();
requestHighway = {
origin: start,
destination: end,
travelMode: google.maps.TravelMode.DRIVING,
avoidHighways: false
};
request = {
origin: start,
destination: end,
travelMode: google.maps.TravelMode.DRIVING,
avoidHighways: true
};
dirService.route(requestHighway, function(response, status) {
if (status == google.maps.DirectionsStatus.OK) {
distHighway = response.routes[0].legs[0].distance.value / 1000;
distHighway = distHighway.toFixed(2);
}
});
dirService.route(request, function(response, status) {
if (status == google.maps.DirectionsStatus.OK) {
dist = response.routes[0].legs[0].distance.value / 1000;
dist = distHighway.toFixed(2);
}
});
if (distHighway - dist == 0) {
return true;
} else {
return false;
}
}
【问题讨论】：
-
你做了什么尝试（比较距离）？我认为您首先需要获取两个值，您的代码目前只有一个。
-
@geocodezip 有些路线没有高速公路，但我的代码仍然计算高速公路价格。我想比较一下高速公路的长度和避开高速公路的路线是否相同，那么就没有高速公路:)
-
这不能回答问题。
-
@geocodezip 对不起，但不明白
-
他的意思是：为了比较距离，你需要有高速公路的距离和没有高速公路的距离。在上面显示的代码中，您只计算有或没有高速公路的距离，具体取决于您选中的复选框“高速公路”。但是，您需要两个距离，然后将它们相减以获得差异。
标签： javascript google-maps google-maps-api-3 directions