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linklinelayer.html
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linklinelayer.html
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<!DOCTYPE html>
<html>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>User Interactions - Draw tool to draw geometries</title>
<style type="text/css">
html,
body {
margin: 0px;
height: 100%;
width: 100%
}
.container {
width: 100%;
height: 100%
}
</style>
<link rel='stylesheet' href='https://maptalks.com/api/maptalks.css' />
<script type='text/javascript' src='https://maptalks.com/api/maptalks.min.js'></script>
<script type='text/javascript' src='https://maptalks.com/api/maptalks-gl-layers.js'></script>
<script type='text/javascript' src='./../assets/lib/randomColor.js'></script>
<body>
<div id="map" class="container"></div>
<script>
// import OverlayLayer from './OverlayLayer';
const VectorLayer = maptalks.VectorLayer;
const options = {
'geometryEvents': false,
'hitDetect': false,
'enableAltitude': true,
'forceRenderOnMoving': true,
'forceRenderOnZooming': true,
'forceRenderOnRotating': true,
};
class LinkLineLayer extends VectorLayer {
}
LinkLineLayer.mergeOptions(options);
const OverlayLayerCanvasRenderer = maptalks.renderer.OverlayLayerCanvasRenderer;
const LineString = maptalks.LineString;
class LinkLineLayerCanvasRenderer extends OverlayLayerCanvasRenderer {
draw() {
this._drawLines();
return this;
}
drawOnInteracting() {
this._drawLines();
return this;
}
_drawLines() {
const layer = this.layer;
if (!layer) {
return this;
}
const map = this.layer.getMap();
if (!map) {
return this;
}
this.prepareCanvas();
if (!this.context) {
return this;
}
const lines = this.layer._geoList.filter(g => {
if (g instanceof LineString) {
g._getPainter();
return true;
}
return false;
});
lines.forEach(line => {
this._drawLinkLine(line);
});
this.completeRender();
return this;
}
_drawLinkLine(line) {
const map = this.layer.getMap();
const coords = line.getCoordinates();
if (!coords || !coords.length) {
return this;
}
if (!line._painter) {
return this;
}
const symbolizer = line._painter.symbolizers;
const lineSymbol = symbolizer[0];
if (!lineSymbol) {
return this;
}
const altitude = line._painter.getAltitude();
const { lineColor, lineWidth, shadowBlur, shadowColor, vertexs, offsetX, offsetY } = lineSymbol.symbol || {};
const renderPoints = line._painter.getRenderPoints()[0][0];
const glRes = map.getGLRes();
const pixel = map._pointAtResToContainerPoint(renderPoints, glRes, altitude);
const ctx = this.context;
ctx.strokeStyle = lineColor || '#000';
ctx.lineWidth = lineWidth || 1;
if (shadowBlur) {
ctx.shadowBlur = shadowBlur;
ctx.shadowColor = shadowColor || '#fff';
} else {
ctx.shadowBlur = 0;
// delete ctx.shadowColor;
}
// ctx.shadowColor = shadowColor;
ctx.beginPath();
ctx.moveTo(pixel.x + (offsetX || 0), pixel.y + (offsetY || 0));
if (Array.isArray(vertexs)) {
for (let i = vertexs.length - 1; i >= 0; i--) {
const vertex = vertexs[i];
if (Array.isArray(vertex)) {
const [x, y] = vertex;
ctx.lineTo(x, y);
}
}
}
ctx.stroke();
return this;
}
}
LinkLineLayer.registerRenderer('canvas', LinkLineLayerCanvasRenderer);
var map = new maptalks.Map('map', {
center: [116.45266161, 39.86656647],
zoom: 14,
baseLayer: new maptalks.TileLayer('base', {
urlTemplate: "https://webrd01.is.autonavi.com/appmaptile?lang=zh_cn&size=1&scale=1&style=8&x={x}&y={y}&z={z}",
subdomains: ["a", "b", "c", "d"],
})
});
const layer = new maptalks.VectorLayer('layer', {
enableAltitude: true
}).addTo(map);
const center = map.getCenter();
const altitude = 100;
center.z = altitude;
const point = new maptalks.Marker(center.copy()).addTo(layer);
const linkLayer = new LinkLineLayer('link').addTo(map);
const width = window.innerWidth, height = window.innerHeight;
function addLines() {
const rows = Math.floor(height / 100);
const cx = center.x, cy = center.y;
for (let i = 1; i <= rows; i++) {
const y = i * 100;
const x1 = 100, y1 = y;
const x2 = x1 + 100, y2 = y;
const x3 = x2 + 100, y3 = y2 + Math.random() * 20;
const vs = [[x1, y1], [x2, y2], [x3, y3]];
const line = new maptalks.LineString([center.copy()], {
symbol: {
lineColor: '#000',
lineWidth: 2,
vertexs: vs
}
});
line.addTo(linkLayer)
}
for (let i = 1; i <= rows; i++) {
const y = i * 100;
const x1 = width - 100, y1 = y;
const x2 = x1 - 100, y2 = y;
const x3 = x2 - 100, y3 = y2 + Math.random() * 20;
const vs = [[x1, y1], [x2, y2], [x3, y3]];
const line = new maptalks.LineString([center.copy()], {
symbol: {
lineColor: '#000',
lineWidth: 2,
vertexs: vs
}
});
line.addTo(linkLayer)
}
}
addLines();
</script>
</body>
</html>