记录一下为数不多的前端任务，基于echarts实现3D柱形图
效果图：
这里是将echarts放入了一个html，也可以将echarts代码摘出来灵活使用，同时x轴y轴的配置项也都在，只是这里没有显示出来，可根据需求自由配置
代码如下：
<html lang="zh-CN" style="height: 100%">
<head>
<meta charset="utf-8">
</head>
<body style="height: 100%; margin: 0">
<div id="container" style="height: 100%"></div>
<script type="text/javascript" src="https://fastly.jsdelivr.net/npm/echarts@5.4.0/dist/echarts.min.js"></script>
<!-- Uncomment this line if you want to dataTool extension
<script type="text/javascript" src="https://fastly.jsdelivr.net/npm/echarts@5.4.0/dist/extension/dataTool.min.js"></script>
-->
<!-- Uncomment this line if you want to use gl extension
<script type="text/javascript" src="https://fastly.jsdelivr.net/npm/echarts-gl@2/dist/echarts-gl.min.js"></script>
-->
<!-- Uncomment this line if you want to echarts-stat extension
<script type="text/javascript" src="https://fastly.jsdelivr.net/npm/echarts-stat@latest/dist/ecStat.min.js"></script>
-->
<!-- Uncomment this line if you want to use map
<script type="text/javascript" src="https://fastly.jsdelivr.net/npm/echarts@4.9.0/map/js/china.js"></script>
<script type="text/javascript" src="https://fastly.jsdelivr.net/npm/echarts@4.9.0/map/js/world.js"></script>
-->
<!-- Uncomment these two lines if you want to use bmap extension
<script type="text/javascript" src="https://api.map.baidu.com/api?v=3.0&ak=YOUR_API_KEY"></script>
<script type="text/javascript" src="https://fastly.jsdelivr.net/npm/echarts@5.4.0/dist/extension/bmap.min.js"></script>
-->
<script type="text/javascript">
var dom = document.getElementById('container');
var myChart = echarts.init(dom, null, {
renderer: 'canvas',
useDirtyRect: false
});
var app = {};
var option;
let x=['账号共用','路径探测','单IP多账户共用','境外IP访问','单次访问敏感数据'];
let y=[90,80,70,15,10];
const wid = 45;
const w1 = Math.sin(Math.PI / 15) * wid; //4
const w2 = Math.sin(Math.PI / 3) * wid; // 6.8
const snapHeight = wid / 1.5;
const CubeLeft = echarts.graphic.extendShape({
shape: {
x: 0,
y: 0
},
buildPath: function (ctx, shape) {
// 会canvas的应该都能看得懂，shape是从custom传入的
const xAxisPoint = shape.xAxisPoint
const c0 = [shape.x, shape.y]
const c1 = [shape.x - w2, shape.y]
const c2 = [shape.x - w2, xAxisPoint[1]]
const c3 = [shape.x, xAxisPoint[1]]
ctx.moveTo(c0[0], c0[1]).lineTo(c1[0], c1[1]).lineTo(c2[0], c2[1]).lineTo(c3[0], c3[1]).closePath()
}
})
// 绘制右侧面
const CubeRight = echarts.graphic.extendShape({
shape: {
x: 0,
y: 0
},
buildPath: function (ctx, shape) {
const xAxisPoint = shape.xAxisPoint
const c1 = [shape.x, shape.y]
const c2 = [shape.x, xAxisPoint[1]]
const c3 = [shape.x + w1, xAxisPoint[1] - w2 + snapHeight]
const c4 = [shape.x + w1, shape.y - w2 + snapHeight]
ctx.moveTo(c1[0], c1[1]).lineTo(c2[0], c2[1]).lineTo(c3[0], c3[1]).lineTo(c4[0], c4[1]).closePath()
}
})
// 绘制顶面
const CubeTop = echarts.graphic.extendShape({
shape: {
x: 0,
y: 0
},
buildPath: function (ctx, shape) {
//
const c1 = [shape.x, shape.y]
const c2 = [shape.x + w1, shape.y - w2 + snapHeight] //右点
const c3 = [shape.x - w2 + w1, shape.y - w2 + snapHeight]
const c4 = [shape.x - w2, shape.y]
ctx.moveTo(c1[0], c1[1]).lineTo(c2[0], c2[1]).lineTo(c3[0], c3[1]).lineTo(c4[0], c4[1]).closePath()
}
})
// 注册三个面图形
echarts.graphic.registerShape('CubeLeft', CubeLeft)
echarts.graphic.registerShape('CubeRight', CubeRight)
echarts.graphic.registerShape('CubeTop', CubeTop)
option = {
title:{
text:'',
x: 'center',
y:'20',
textStyle: {
color: '#fff',
fontSize: 20
}
},
backgroundColor:'rgba(0,0,0,.8)',
tooltip: {
show:false,
trigger: 'axis',
axisPointer: {
type: 'shadow'
},
},
grid: {
left: '5%',
right: '5%',
top: '15%',
bottom: '10%',
containLabel: true
},
xAxis: {
type: 'category',
name:'',
nameTextStyle:{
color:'rgba(16, 213, 223, .5)',
fontSize:12
},
data: x,
axisLine: {
show: false,
lineStyle: {
color: '#3e6f8e',
width:1
}
},
axisTick: {
show: false,
length: 9,
alignWithLabel: true,
lineStyle: {
color: '#AAA'
}
},
axisLine: {
show: false,
lineStyle: {
color: 'rgba(27, 202, 242, .2)',
width:1
}
},
axisLabel:{
interval:0,
rotate:0,
color: '#FFFFFF'
},
splitLine:{
show: false,
lineStyle: {
color: '#ffffff',
opacity:0.2,
width:1
}
},
},
yAxis: {
name:'',
min:0,
max:100,
type: 'value',
nameTextStyle:{
color:'rgba(16, 213, 223, 1)',
fontSize:12
},
axisLine: {
show: false,
lineStyle: {
color: 'rgba(27, 202, 242, .2)',
width:1
}
},
axiosTick:{
show:false
},
axisLabel: {
show: false,
color: 'rgba(16, 213, 223, .4)',
fontSize:12
},
splitLine:{
show: false,
lineStyle: {
color: 'rgba(5, 80, 123, .1)',
type:'dashed',
width:1
}
},
},
series: [
{
type: 'bar',
label: {
normal: {
show: true,
position: 'top',
fontSize: 12,
color: '#FFFFFF',
formatter:function(params){
return params.value
},
offset: [0, -10],
},
},
tooltip: {
show:false
},
itemStyle: {
color: 'transparent',
},
data:y,
},
{
type: 'custom',
renderItem: (params, api) => {
const location = api.coord([api.value(0), api.value(1)]);
location[0] = location[0] + wid*0;
const xlocation = api.coord([api.value(0), 0]);
xlocation[0] = xlocation[0] + wid*0;
return {
type: 'group',
children: [{
type: 'CubeLeft',
shape: {
api,
xValue: api.value(0),
yValue: api.value(1),
x: location[0],
y: location[1],
xAxisPoint: xlocation
},
style: {
fill: new echarts.graphic.LinearGradient(0, 0, 0, 1, [{
offset: 0,
color: 'rgba(5,157,230,0.5)',
opacity:1
},
{
offset: 1,
color: 'rgba(5,157,230,0.5)'
}
])
}
}, {
type: 'CubeRight',
shape: {
api,
xValue: api.value(0),
yValue: api.value(1),
x: location[0],
y: location[1],
xAxisPoint: xlocation
},
style: {
fill: new echarts.graphic.LinearGradient(0, 0, 0, 1, [{
offset: 0,
color: 'rgba(0,172,207,0.5)'
},
{
offset: 1,
color: 'rgba(0,172,207,0.5)'
}
])
}
}, {
type: 'CubeTop',
shape: {
api,
xValue: api.value(0),
yValue: api.value(1),
x: location[0],
y: location[1],
xAxisPoint: xlocation
},
style: {
fill: new echarts.graphic.LinearGradient(0, 0, 0, 1, [{
offset: 0,
color: 'rgba(23,224,254,0.5)'
},
{
offset: 1,
color: 'rgba(23,224,254,0.5)'
}
])
}
}]
}
},
color:'blue',
data: y
}]
};
if (option && typeof option === 'object') {
myChart.setOption(option);
}
window.addEventListener('resize', myChart.resize);
</script>
</body>
</html>
[代码片段](https://code.juejin.cn/pen/7158716999634255887)
同时分享一个echarts的宝藏网站，此代码是基于网站上的代码修改的，链接如下：
