超过 100 个点和一条折线,Google Maps v3
More than 100 points and one polyline, Google Maps v3
我正在使用 google 地图 api v3 我正在尝试使用 snap to road 超过 100 个点,但另外最终只有一条包含整个路线的多段线,我可以放一个小动画。视图是 html.erb.
var apiKey = any_key;
var map = handler.getMap();
var drawingManager;
var placeIdArray = [];
var snappedCoordinates = [];
var path = <%= raw(@locations) %>
var markers = <%= raw(@markers) %>
var centerOn = path[0].split(',');
function breadCrumbsGrapher(path) {
handler.removeMarkers(Gmaps.store.markers);
for(var i = 0; i < polylines.length; i++) {
polylines[i].setMap(null);
}
var divided = handlePath(path);
if (typeof divided[0] == 'object') {
for(var i = 0; i < divided.length; i++) {
runSnapToRoad(divided[i]);
}
} else {
runSnapToRoad(path);
}
}
function waypointsLimiter(path) {
var path_loc_size = path.length;
var limited = [];
if(path_loc_size > 30) {
var stepper = Math.ceil(path_loc_size/30);
for(var i = stepper; i < path_loc_size; i += stepper) {
limited.push(path[i]);
}
if(limited.indexOf(path[path_loc_size-1]) == -1) {
limited.push(path[path_loc_size-1]);
}
} else {
limited = path;
}
return limited;
}
function handlePath(path) {
var i = 0;
var j = path.length;
if (j > 100) {
var newArray = [],
chunk = j/2;
if (j >= 200) {
chunk = j/3;
} else if (j >= 300) {
chunk = j/4;
} else if (j >= 400) {
chunk = j/5;
} else if (j >= 500 ) {
chunk = j/6;
} else if (j >= 600) {
chunk = j/7;
} else if (j >= 700 || j <= 799) {
chunk = j/8;
} else {
alert('La ruta no puede ser mostrada');
}
for (i, j; i < j; i+=chunk) {
newArray.push(path.slice(i,i+chunk+1));
}
return newArray;
} else {
return path;
}
}
// Snap a user-created polyline to roads and draw the snapped path
function runSnapToRoad(path) {
var path = path.join('|');
$.get('https://roads.googleapis.com/v1/snapToRoads', {
interpolate: true,
key: apiKey,
path: path,
}, function(data) {
processSnapToRoadResponse(data);
drawSnappedPolyline();
});
}
// Store snapped polyline returned by the snap-to-road service.
function processSnapToRoadResponse(data) {
snappedCoordinates = [];
placeIdArray = [];
for (var i = 0; i < data.snappedPoints.length; i++) {
var latlng = new google.maps.LatLng(
data.snappedPoints[i].location.latitude,
data.snappedPoints[i].location.longitude);
snappedCoordinates.push(latlng);
placeIdArray.push(data.snappedPoints[i].placeId);
}
}
// Draws the snapped polyline (after processing snap-to-road response).
function drawSnappedPolyline() {
var symbol = {
path: google.maps.SymbolPath.FORWARD_CLOSED_ARROW,
scale: 3,
strokeColor: '#3B16B3'
};
var snappedPolyline = new google.maps.Polyline({
path: snappedCoordinates,
strokeColor: '#E51E25',
strokeWeight: 3,
icons: [{
icon: symbol,
offset: '0%'
}]
});
snappedPolyline.setMap(map);
animate(snappedPolyline);
zoomToObject(snappedPolyline);
polylines.push(snappedPolyline);
}
function zoomToObject(obj){
var bounds = new google.maps.LatLngBounds();
var points = obj.getPath().getArray();
for (var n = 0; n < points.length ; n++){
bounds.extend(points[n]);
}
map.fitBounds(bounds);
}
function animate(line) {
var count = 0;
window.setInterval(function() {
count = (count + 1) % 600;
var icons = line.get('icons');
icons[0].offset = (count / 6) + '%';
line.set('icons', icons);
}, 70);
}
breadCrumbsGrapher(path);
我也试过在外部声明一个变量,这样我就可以连接所有坐标并用它生成折线,但似乎不起作用。实际上那个大数组最终有 2000+ 个点。
The result that I have with the provided code
毕竟,问题是我不知道如何将多段线合并为只有一根线,并且能够只为那一根线制作动画。如果有超过 100 个坐标,我会绘制更多折线。在图像中你可以看到有 3 个图标(每条折线一个),我只需要画一条线并有 1 个图标。
要重现该问题,只需添加一个键,如果您想使用这组坐标:
https://drive.google.com/file/d/1jLb7Djv5DiSdR3k4QZRSatXBwrohlxcI/view?usp=sharing
function breadCrumbsGrapher(path) {
//mapMarkers();
snappedCoordinates = [];
handler.removeMarkers(Gmaps.store.markers);
for(var i = 0; i < polylines.length; i++) {
polylines[i].setMap(null);
}
var divided = handlePath(path);
if (typeof divided[0] == 'object') {
for(var i = 0; i < divided.length; i++) {
runSnapToRoad(divided[i]);
}
} else {
runSnapToRoad(path);
}
console.log(snappedCoordinates);
drawSnappedPolyline();
}
function runSnapToRoad(path) {
var path = path.join('|');
$.get('https://roads.googleapis.com/v1/snapToRoads', {
interpolate: true,
key: apiKey,
path: path,
}, function(data) {
processSnapToRoadResponse(data);
//drawSnappedPolyline();
});
}
我已经更改了代码,但它不起作用,即使我最终得到一个 2,557 坐标数组。
我试过也试过这个认为这可以让我有时间拥有所有坐标:
async function breadCrumbsGrapher(path) {
//mapMarkers();
snappedCoordinates = [];
handler.removeMarkers(Gmaps.store.markers);
for(var i = 0; i < polylines.length; i++) {
polylines[i].setMap(null);
}
var divided = handlePath(path);
if (typeof divided[0] == 'object') {
for(var i = 0; i < divided.length; i++) {
await runSnapToRoad(divided[i]);
}
} else {
await runSnapToRoad(path);
}
console.log(snappedCoordinates);
drawSnappedPolyline();
}
和:
async function runSnapToRoad(path) {
var path = path.join('|');
await $.get('https://roads.googleapis.com/v1/snapToRoads', {
interpolate: true,
key: apiKey,
path: path,
}, function(data) {
processSnapToRoadResponse(data);
});
}
提前谢谢你。
您正在使用 $.get()
查询道路 API 这是一个异步调用,因此当您从 breadCrumbsGrapher
函数中调用 drawSnappedPolyline()
时,您很可能没有AJAX 呼叫中的 return 中的所有坐标(尚未)。
如果您在原始路径中有 550 个坐标,那么您就知道必须调用道路 API 6 次(5 次 100 点 + 1 次 50 点)。然后你应该能够在某个地方设置一个计数器,一旦你从道路 API 得到 6 个响应,就只绘制你的(完整的)折线。
或者您可以基于最终数组的长度(与原始路径相比),尽管我不知道如果某些点不能 "snapped" 会发生什么。
我正在使用 google 地图 api v3 我正在尝试使用 snap to road 超过 100 个点,但另外最终只有一条包含整个路线的多段线,我可以放一个小动画。视图是 html.erb.
var apiKey = any_key;
var map = handler.getMap();
var drawingManager;
var placeIdArray = [];
var snappedCoordinates = [];
var path = <%= raw(@locations) %>
var markers = <%= raw(@markers) %>
var centerOn = path[0].split(',');
function breadCrumbsGrapher(path) {
handler.removeMarkers(Gmaps.store.markers);
for(var i = 0; i < polylines.length; i++) {
polylines[i].setMap(null);
}
var divided = handlePath(path);
if (typeof divided[0] == 'object') {
for(var i = 0; i < divided.length; i++) {
runSnapToRoad(divided[i]);
}
} else {
runSnapToRoad(path);
}
}
function waypointsLimiter(path) {
var path_loc_size = path.length;
var limited = [];
if(path_loc_size > 30) {
var stepper = Math.ceil(path_loc_size/30);
for(var i = stepper; i < path_loc_size; i += stepper) {
limited.push(path[i]);
}
if(limited.indexOf(path[path_loc_size-1]) == -1) {
limited.push(path[path_loc_size-1]);
}
} else {
limited = path;
}
return limited;
}
function handlePath(path) {
var i = 0;
var j = path.length;
if (j > 100) {
var newArray = [],
chunk = j/2;
if (j >= 200) {
chunk = j/3;
} else if (j >= 300) {
chunk = j/4;
} else if (j >= 400) {
chunk = j/5;
} else if (j >= 500 ) {
chunk = j/6;
} else if (j >= 600) {
chunk = j/7;
} else if (j >= 700 || j <= 799) {
chunk = j/8;
} else {
alert('La ruta no puede ser mostrada');
}
for (i, j; i < j; i+=chunk) {
newArray.push(path.slice(i,i+chunk+1));
}
return newArray;
} else {
return path;
}
}
// Snap a user-created polyline to roads and draw the snapped path
function runSnapToRoad(path) {
var path = path.join('|');
$.get('https://roads.googleapis.com/v1/snapToRoads', {
interpolate: true,
key: apiKey,
path: path,
}, function(data) {
processSnapToRoadResponse(data);
drawSnappedPolyline();
});
}
// Store snapped polyline returned by the snap-to-road service.
function processSnapToRoadResponse(data) {
snappedCoordinates = [];
placeIdArray = [];
for (var i = 0; i < data.snappedPoints.length; i++) {
var latlng = new google.maps.LatLng(
data.snappedPoints[i].location.latitude,
data.snappedPoints[i].location.longitude);
snappedCoordinates.push(latlng);
placeIdArray.push(data.snappedPoints[i].placeId);
}
}
// Draws the snapped polyline (after processing snap-to-road response).
function drawSnappedPolyline() {
var symbol = {
path: google.maps.SymbolPath.FORWARD_CLOSED_ARROW,
scale: 3,
strokeColor: '#3B16B3'
};
var snappedPolyline = new google.maps.Polyline({
path: snappedCoordinates,
strokeColor: '#E51E25',
strokeWeight: 3,
icons: [{
icon: symbol,
offset: '0%'
}]
});
snappedPolyline.setMap(map);
animate(snappedPolyline);
zoomToObject(snappedPolyline);
polylines.push(snappedPolyline);
}
function zoomToObject(obj){
var bounds = new google.maps.LatLngBounds();
var points = obj.getPath().getArray();
for (var n = 0; n < points.length ; n++){
bounds.extend(points[n]);
}
map.fitBounds(bounds);
}
function animate(line) {
var count = 0;
window.setInterval(function() {
count = (count + 1) % 600;
var icons = line.get('icons');
icons[0].offset = (count / 6) + '%';
line.set('icons', icons);
}, 70);
}
breadCrumbsGrapher(path);
我也试过在外部声明一个变量,这样我就可以连接所有坐标并用它生成折线,但似乎不起作用。实际上那个大数组最终有 2000+ 个点。
The result that I have with the provided code
毕竟,问题是我不知道如何将多段线合并为只有一根线,并且能够只为那一根线制作动画。如果有超过 100 个坐标,我会绘制更多折线。在图像中你可以看到有 3 个图标(每条折线一个),我只需要画一条线并有 1 个图标。
要重现该问题,只需添加一个键,如果您想使用这组坐标:
https://drive.google.com/file/d/1jLb7Djv5DiSdR3k4QZRSatXBwrohlxcI/view?usp=sharing
function breadCrumbsGrapher(path) {
//mapMarkers();
snappedCoordinates = [];
handler.removeMarkers(Gmaps.store.markers);
for(var i = 0; i < polylines.length; i++) {
polylines[i].setMap(null);
}
var divided = handlePath(path);
if (typeof divided[0] == 'object') {
for(var i = 0; i < divided.length; i++) {
runSnapToRoad(divided[i]);
}
} else {
runSnapToRoad(path);
}
console.log(snappedCoordinates);
drawSnappedPolyline();
}
function runSnapToRoad(path) {
var path = path.join('|');
$.get('https://roads.googleapis.com/v1/snapToRoads', {
interpolate: true,
key: apiKey,
path: path,
}, function(data) {
processSnapToRoadResponse(data);
//drawSnappedPolyline();
});
}
我已经更改了代码,但它不起作用,即使我最终得到一个 2,557 坐标数组。
我试过也试过这个认为这可以让我有时间拥有所有坐标:
async function breadCrumbsGrapher(path) {
//mapMarkers();
snappedCoordinates = [];
handler.removeMarkers(Gmaps.store.markers);
for(var i = 0; i < polylines.length; i++) {
polylines[i].setMap(null);
}
var divided = handlePath(path);
if (typeof divided[0] == 'object') {
for(var i = 0; i < divided.length; i++) {
await runSnapToRoad(divided[i]);
}
} else {
await runSnapToRoad(path);
}
console.log(snappedCoordinates);
drawSnappedPolyline();
}
和:
async function runSnapToRoad(path) {
var path = path.join('|');
await $.get('https://roads.googleapis.com/v1/snapToRoads', {
interpolate: true,
key: apiKey,
path: path,
}, function(data) {
processSnapToRoadResponse(data);
});
}
提前谢谢你。
您正在使用 $.get()
查询道路 API 这是一个异步调用,因此当您从 breadCrumbsGrapher
函数中调用 drawSnappedPolyline()
时,您很可能没有AJAX 呼叫中的 return 中的所有坐标(尚未)。
如果您在原始路径中有 550 个坐标,那么您就知道必须调用道路 API 6 次(5 次 100 点 + 1 次 50 点)。然后你应该能够在某个地方设置一个计数器,一旦你从道路 API 得到 6 个响应,就只绘制你的(完整的)折线。
或者您可以基于最终数组的长度(与原始路径相比),尽管我不知道如果某些点不能 "snapped" 会发生什么。