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Ticks view #80

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8bdcadd
Added simple geo path.
zhenyanghua Jan 13, 2021
1e59e13
WIP
zhenyanghua Jan 16, 2021
08120b1
WIP
zhenyanghua Jan 16, 2021
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126 changes: 46 additions & 80 deletions example/index.module.html
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Original file line number Diff line number Diff line change
Expand Up @@ -2,101 +2,66 @@
<html>
<head>
<title>Simple Map</title>
<meta name="viewport" content="initial-scale=1.0">
<meta charset="utf-8">
<meta name='viewport' content='initial-scale=1.0'>
<meta charset='utf-8'>
<style>
/* Always set the map height explicitly to define the size of the div
* element that contains the map. */
#map {
height: 100%;
}
/* Optional: Makes the sample page fill the window. */
html, body {
height: 100%;
margin: 0;
padding: 0;
}
#controls {
position: absolute;
top: 100px;
left: 10px;
display: flex;
flex-direction: column;
}
/* Always set the map height explicitly to define the size of the div
* element that contains the map. */
#map {
height: 100%;
}

/* Optional: Makes the sample page fill the window. */
html, body {
height: 100%;
margin: 0;
padding: 0;
}

#controls {
position: absolute;
top: 100px;
left: 10px;
display: flex;
flex-direction: column;
}
</style>
<script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyBTdH3AFSWLD3SrgbNqTGoRsg3U6W0qAAg&libraries=geometry"></script>
<script
src='https://maps.googleapis.com/maps/api/js?key=AIzaSyBTdH3AFSWLD3SrgbNqTGoRsg3U6W0qAAg&libraries=geometry'></script>
</head>
<body>
<div id="map"></div>
<div id="controls">
<button id="start-with-points">Start With Initial Points</button>
<button id="start">Start</button>
<button id="end">End</button>
<button id="invert">Invert Color</button>
<div id='map'></div>
<div id='controls'>
<button id='start-with-points'>Start With Initial Points</button>
<button id='start'>Start</button>
<button id='end'>End</button>
<button id='invert'>Invert Color</button>
</div>
<script type="module">
const center = {lat: 41.70, lng: -71.47};
<script type='module'>
import MeasureTool from '../dist/gmaps-measuretool.esm.js';

const center = { lat: 50, lng: -47.373046875 };
const segments = [
{
"lat": 41.69547509615208,
"lng": -71.36993408203125
},
{
"lat": 41.434490308949215,
"lng": -71.3671875
"lat": 36.143180284242554,
"lng": -78.0691619265955
},
{
"lat": 41.50857729743936,
"lng": -71.20513916015625
"lat": 66.47820814385636,
"lng": -47.373046875
},
{
"lat": 41.66923209813446,
"lng": -71.18435546874998
},
{
"lat": 41.80245339578072,
"lng": -71.34365722656248
},
{
"lat": 41.910875425626266,
"lng": -71.39034912109373
},
{
"lat": 42.01299182987659,
"lng": -71.38760253906248
},
{
"lat": 42.01299182987659,
"lng": -71.80508300781248
},
{
"lat": 41.69957665997156,
"lng": -71.795654296875
},
{
"lat": 41.3566211272796,
"lng": -71.82156249999998
},
{
"lat": 41.37723402378496,
"lng": -71.49471923828123
},
{
"lat": 41.6154423246811,
"lng": -71.48529052734375
},
{

"lat": 41.69547509615208,
"lng": -71.36993408203125
"lat": 37.61423141542417,
"lng": -2.3291015625
}
];

var map, measureTool;

function initMap() {
map = new google.maps.Map(document.getElementById('map'), {
center,
zoom: 9,
zoom: 4,
scaleControl: true
});
measureTool = new MeasureTool(map, {
Expand Down Expand Up @@ -138,17 +103,18 @@
// measureTool.removeListener('measure_change');
});
}
initMap()

initMap();
let inverted = false;
document.querySelector('#start-with-points')
.addEventListener('click', () => measureTool.start(segments));
.addEventListener('click', () => measureTool.start(segments));
document.querySelector('#start')
.addEventListener('click', () => measureTool.start());
document.querySelector('#end')
.addEventListener('click', () => measureTool.end());
document.querySelector('#invert')
.addEventListener('click', () => {
inverted = !inverted
inverted = !inverted;
measureTool.setOption('invertColor', inverted);
});
</script>
Expand Down
13 changes: 13 additions & 0 deletions package-lock.json
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1 change: 1 addition & 0 deletions package.json
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Original file line number Diff line number Diff line change
Expand Up @@ -32,6 +32,7 @@
"homepage": "https://github.com/zhenyanghua/MeasureTool-GoogleMaps-V3#readme",
"dependencies": {
"d3-drag": "^2.0.0",
"d3-geo": "^2.0.1",
"d3-selection": "^2.0.0"
},
"devDependencies": {
Expand Down
2 changes: 1 addition & 1 deletion rollup.config.js
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Original file line number Diff line number Diff line change
Expand Up @@ -46,4 +46,4 @@ const esm = {
onwarn
};

export default [umd, esm];
export default [esm];
30 changes: 30 additions & 0 deletions src/geometry.js
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,20 @@ export class Geometry {
return segments;
}

get lingString() {
return Geometry.toLineString(this._nodes);
}

static toLineString(points) {
return {
"type": "Feature",
"geometry": {
"type": "LineString",
"coordinates": points
}
}
}

constructor() {
this._nodes = [];
}
Expand All @@ -31,4 +45,20 @@ export class Geometry {
insertNode(i, point) {
this._nodes.splice(i, 0, point);
}

static equals(segments1, segments2) {
if (segments1.length !== segments2.length) {
return false;
}
for (let i = 0; i < segments1.length; i++) {
if (segments1[i][0][0] !== segments2[i][0][0] ||
segments1[i][0][1] !== segments2[i][0][1] ||
segments1[i][1][0] !== segments2[i][1][0] ||
segments1[i][1][1] !== segments2[i][1][1]) {
return false;
}
}
return true;
}

}
62 changes: 61 additions & 1 deletion src/helper.js
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Original file line number Diff line number Diff line change
@@ -1,10 +1,12 @@
import { UnitTypeId } from './UnitTypeId';
import { Geometry } from './geometry';
export default class Helper {
constructor(options) {
this._options = {
unit: UnitTypeId.METRIC,
};
Object.assign(this._options, options);
this._lastInterpolatedPoints = { segments: [], length: 0, points: [] };
this.init();
}

Expand Down Expand Up @@ -196,7 +198,7 @@ export default class Helper {
* @private
*/
static _interpolate(p1, p2, fraction) {
let point = google.maps.geometry.spherical.interpolate(
const point = google.maps.geometry.spherical.interpolate(
new google.maps.LatLng(p1[1], p1[0]),
new google.maps.LatLng(p2[1], p2[0]),
fraction
Expand All @@ -209,4 +211,62 @@ export default class Helper {
// let y = m * x + b;
// return [x, y];
}

/**
* if last segment length (start with 0) adds current segment length is less than tick length,
* segment length = last segment length + segment length
* last segment length = segment length;
* move on to the next segment
*
* current point = compute the latlng using fraction (tick length - last segment length ) / current segment length
* between current segment start point and end point.
* segment length = segment length - (tick length - last segment length)
*
* While the given minimum tick length is less than the segment length,
* compute the latlng at the fraction between current point and the end point.
* push the latlng
* assign the latlng to current point.
* segment length subtracts tick length.
*
* @param segments
* @param length
* @param includeSegmentNodes
*/
interpolatePointsOnPath(segments, length, includeSegmentNodes = false) {
if (this._lastInterpolatedPoints.length === length &&
Geometry.equals(this._lastInterpolatedPoints.segments, segments)) {
return this._lastInterpolatedPoints.points;
}
console.debug('interpolatePointsOnPath called')
if (segments.length === 0) return [];
let lastSegmentLength = 0, curPoint = segments[0][0], points = [];
for (let i = 0; i < segments.length; i++) {
if (includeSegmentNodes) points.push(segments[i][0]);
let segmentLength = this.computeLengthBetween(segments[i][0], segments[i][1]);
if (lastSegmentLength + segmentLength < length) {
segmentLength += lastSegmentLength;
lastSegmentLength = segmentLength;
continue;
}
curPoint = Helper._interpolate(
segments[i][0],
segments[i][1],
(length - lastSegmentLength) / segmentLength);
segmentLength -= (length - lastSegmentLength);
points.push(curPoint);
while(length < segmentLength) {
curPoint = Helper._interpolate(curPoint, segments[i][1], length / segmentLength);
points.push(curPoint);
segmentLength -= length;
lastSegmentLength = segmentLength;
}
}
if (includeSegmentNodes) points.push(segments[segments.length - 1][1]);
this._lastInterpolatedPoints = {
length,
segments,
points
};
return points;
}
}
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