flowGL-random.html
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<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Random Flow - ECHARTS-GL</title>
<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no">
<meta name="apple-mobile-web-app-capable" content="yes"> <!-- Fullscreen Landscape on iOS -->
<link rel="stylesheet" href="./common.css">
</head>
<body>
<div id="main"></div>
<script src="../node_modules/echarts/dist/echarts.js"></script>
<script src="../dist/echarts-gl.js"></script>
<script src="lib/jquery.min.js"></script>
<script src="lib/simplex.js"></script>
<script src="js/commonUI.js"></script>
<script>
var chart = echarts.init(document.getElementById('main'));
var noise = new SimplexNoise(Math.random);
var noise2 = new SimplexNoise(Math.random);
function generateData() {
var data = [];
for (var i = 0; i <= 50; i++) {
for (var j = 0; j <= 50; j++) {
var dx = noise.noise2D(i / 30, j / 30);
var dy = noise2.noise2D(i / 30, j / 30);
var mag = Math.sqrt(dx * dx + dy * dy);
valMax = Math.max(valMax, mag);
valMin = Math.min(valMin, mag);
data.push([i, j, dx, dy, mag]);
}
}
return data;
}
var valMin = Infinity;
var valMax = -Infinity;
var data = generateData();
chart.setOption({
visualMap: {
show: false,
min: valMin,
max: valMax,
dimension: 4,
inRange: {
color: ['#313695', '#4575b4', '#74add1', '#abd9e9', '#e0f3f8', '#ffffbf', '#fee090', '#fdae61', '#f46d43', '#d73027', '#a50026']
}
},
xAxis: {
type: 'value',
axisLine: {
lineStyle: {
color: '#fff'
}
},
splitLine: {
show: false,
lineStyle: {
color: 'rgba(255,255,255,0.2)'
}
}
},
yAxis: {
type: 'value',
axisLine: {
lineStyle: {
color: '#fff'
}
},
splitLine: {
show: false,
lineStyle: {
color: 'rgba(255,255,255,0.2)'
}
}
},
series: [{
type: 'flowGL',
data: data,
particleDensity: 64,
particleSize: 5,
itemStyle: {
opacity: 0.5
}
}, {
type: 'custom',
data: data,
encode: {
x: 0,
y: 0
},
renderItem: function (params, api) {
var x = api.value(0), y = api.value(1), dx = api.value(2), dy = api.value(3);
var start = api.coord([x - dx / 2, y - dy / 2]);
var end = api.coord([x + dx / 2, y + dy / 2]);
return {
type: 'line',
shape: {
x1: start[0], y1: start[1],
x2: end[0], y2: end[1]
},
style: {
lineWidth: 2,
stroke:'#fff'
}
}
}
}]
});
window.onresize = chart.resize;
</script>
</body>
</html>