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I have seen few examples of animated line on mapbox but I haven't found any that creates a linear line between two points. I am able to create markers on the map and also to draw a line between these markers. But, I want to create that line slowly from origin(start) to destination(end). here is the code that draw line between two coordinates. I just want to make it slowly(animatedly) and then repeat that animation.
<!DOCTYPE html>
<html>
<head>
<meta charset='utf-8' />
<title>Animate a line</title>
<meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
<script src='.50.0/mapbox-gl.js'></script>
<link href='.50.0/mapbox-gl.css' rel='stylesheet' />
<style>
body { margin:0; padding:0; }
#map { position:absolute; top:0; bottom:0; width:100%; }
#route {
stroke-dasharray: 1000;
stroke-dashoffset: 1000;
animation: dash 1s linear alternate infinite;
}
@keyframes dash {
from {
stroke-dashoffset: 1000;
}
to {
stroke-dashoffset: 0;
}
}
</style>
</head>
<body>
<div id='map'></div>
<script>
mapboxgl.accessToken =
"pk.eyJ1IjoiaHllb25namlua2ltIiwiYSI6ImNpZXh4dXp5eDA2YjFzaGtyOGR2dnBza2oifQ.a5K673tSr0cOcYoX1rpPhg";
var map = new mapboxgl.Map({
container: 'map',
style: 'mapbox://styles/mapbox/streets-v9',
center: [-122.486052, 37.830348],
zoom: 5
});
map.on('load', function () {
map.addLayer({
"id": "route",
"type": "line",
"source": {
"type": "geojson",
"data": {
"type": "Feature",
"properties": {},
"geometry": {
"type": "LineString",
"coordinates": [
[-122.414, 37.776],
[-77.032, 38.913]
]
}
}
}
});
});
</script>
</body>
</html>
I have seen few examples of animated line on mapbox but I haven't found any that creates a linear line between two points. I am able to create markers on the map and also to draw a line between these markers. But, I want to create that line slowly from origin(start) to destination(end). here is the code that draw line between two coordinates. I just want to make it slowly(animatedly) and then repeat that animation.
<!DOCTYPE html>
<html>
<head>
<meta charset='utf-8' />
<title>Animate a line</title>
<meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
<script src='https://api.tiles.mapbox./mapbox-gl-js/v0.50.0/mapbox-gl.js'></script>
<link href='https://api.tiles.mapbox./mapbox-gl-js/v0.50.0/mapbox-gl.css' rel='stylesheet' />
<style>
body { margin:0; padding:0; }
#map { position:absolute; top:0; bottom:0; width:100%; }
#route {
stroke-dasharray: 1000;
stroke-dashoffset: 1000;
animation: dash 1s linear alternate infinite;
}
@keyframes dash {
from {
stroke-dashoffset: 1000;
}
to {
stroke-dashoffset: 0;
}
}
</style>
</head>
<body>
<div id='map'></div>
<script>
mapboxgl.accessToken =
"pk.eyJ1IjoiaHllb25namlua2ltIiwiYSI6ImNpZXh4dXp5eDA2YjFzaGtyOGR2dnBza2oifQ.a5K673tSr0cOcYoX1rpPhg";
var map = new mapboxgl.Map({
container: 'map',
style: 'mapbox://styles/mapbox/streets-v9',
center: [-122.486052, 37.830348],
zoom: 5
});
map.on('load', function () {
map.addLayer({
"id": "route",
"type": "line",
"source": {
"type": "geojson",
"data": {
"type": "Feature",
"properties": {},
"geometry": {
"type": "LineString",
"coordinates": [
[-122.414, 37.776],
[-77.032, 38.913]
]
}
}
}
});
});
</script>
</body>
</html>
- 1 would it be a solution to devide the line into points and draw them individually, like that you can decide how fast teh whole line is drawn and where it starts to be drawn etc – Erch Commented Oct 23, 2018 at 6:19
- yes I also thought about that but I only have two coordinates, Is there any way to get coordinates after specific steps(between two coordinates). – Muhammad Haseeb Commented Oct 23, 2018 at 6:28
1 Answer
Reset to default 5Here is a plete code for calculating the points(Lat, Long) between source and destination and then creating an animation between these two points.
<!DOCTYPE html>
<html>
<head>
<meta charset='utf-8' />
<title>Animate a line</title>
<meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
<script src='https://api.tiles.mapbox./mapbox-gl-js/v0.50.0/mapbox-gl.js'></script>
<link href='https://api.tiles.mapbox./mapbox-gl-js/v0.50.0/mapbox-gl.css' rel='stylesheet' />
<style>
body {
margin: 0;
padding: 0;
}
#map {
position: absolute;
top: 0;
bottom: 0;
width: 100%;
}
</style>
</head>
<body>
<div id='map'></div>
<script>
mapboxgl.accessToken = 'pk.eyJ1IjoiYWhtZWRraGFuMTAzOSIsImEiOiJjam5iZDgwejYwMnlpM3FyNzJvMDZhZHdoIn0.pcOWSRI2xzY_oMX0mVsLjg';
var map = new mapboxgl.Map({
container: 'map',
style: 'mapbox://styles/mapbox/dark-v9',
center: [0.11256, 52.201733],
zoom: 15
});
// Create a GeoJSON source with an empty lineString.
var geojson = {
"type": "FeatureCollection",
"features": [{
"type": "Feature",
"geometry": {
"type": "LineString",
"coordinates": []
}
}]
};
var startPoint = [0.108266, 52.202758];
var endPoint = [0.11556, 52.201733];
var framesPerSecond = 20;
var initialOpacity = 1
var opacity = initialOpacity;
var initialRadius = 4;
var radius = initialRadius;
var maxRadius = 15;
var speedFactor = 100 // number of frames per longitude degree
var animation; // to store and cancel the animation
map.on('load', function() {
// Point 1
map.addSource('point1', {
"type": "geojson",
"data": {
"type": "Point",
"coordinates": [
startPoint[0], startPoint[1]
]
}
});
map.addLayer({
"id": "circle1",
"source": "point1",
"type": "circle",
"paint": {
"circle-radius": initialRadius,
"circle-radius-transition": {
duration: 0
},
"circle-opacity-transition": {
duration: 0
},
"circle-color": "#007cbf"
}
});
map.addLayer({
"id": "point1",
"source": "point1",
"type": "circle",
"paint": {
"circle-radius": initialRadius,
"circle-color": "#007cbf"
}
});
// Point 2
map.addSource('point2', {
"type": "geojson",
"data": {
"type": "Point",
"coordinates": [
endPoint[0], endPoint[1]
]
}
});
map.addLayer({
"id": "circle2",
"source": "point2",
"type": "circle",
"paint": {
"circle-radius": initialRadius,
"circle-radius-transition": {
duration: 0
},
"circle-opacity-transition": {
duration: 0
},
"circle-color": "#007cbf"
}
});
map.addLayer({
"id": "point2",
"source": "point2",
"type": "circle",
"paint": {
"circle-radius": initialRadius,
"circle-color": "#007cbf"
}
});
//Line
map.addLayer({
'id': 'line-animation',
'type': 'line',
'source': {
'type': 'geojson',
'data': geojson
},
'layout': {
'line-cap': 'round',
'line-join': 'round'
},
'paint': {
'line-color': '#ffffff',
'line-width': 2
}
});
var diffX = endPoint[0] - startPoint[0];
var diffY = endPoint[1] - startPoint[1];
var sfX = diffX / speedFactor;
var sfY = diffY / speedFactor;
var i = 0;
var j = 0;
var lineCoordinates = [];
while (i < diffX || Math.abs(j) < Math.abs(diffY)) {
lineCoordinates.push([startPoint[0] + i, startPoint[1] + j]);
if (i < diffX) {
i += sfX;
}
if (Math.abs(j) < Math.abs(diffY)) {
j += sfY;
}
}
console.log(lineCoordinates);
var animationCounter = 0;
function animateLine() {
if (animationCounter < lineCoordinates.length) {
geojson.features[0].geometry.coordinates.push(lineCoordinates[animationCounter]);
map.getSource('line-animation').setData(geojson);
requestAnimationFrame(animateLine);
animationCounter++;
} else {
var coord = geojson.features[0].geometry.coordinates;
coord.shift();
console.log(coord);
if (coord.length > 0) {
geojson.features[0].geometry.coordinates = coord;
map.getSource('line-animation').setData(geojson);
//-------------- Point2 Animation End ---------------
requestAnimationFrame(animateLine);
}
}
}
animateLine();
});
</script>
</body>
</html>
本文标签： javascriptDraw a linear animated line between two markers in MapBoxStack Overflow
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