html
typescript
<script src="https://cdn.jsdelivr.net/npm/echarts/dist/echarts.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/echarts-gl/dist/echarts-gl.min.js"></script>
<style>
#echarts {
width: 500px;
height: 500px
}
</style>
<div id="echarts"></div>
js
typescript
let option3;
var newArr = [{
name: '线下常规培训',
value: 55,
itemStyle: {
color: '#438ddf'
}
}, {
name: '线上指导培训',
value: 30,
itemStyle: {
color: '#6be397',
}
}, {
name: '专业院校系统培训',
value: 20,
itemStyle: {
color: '#e6e6e6'
}
}, {
name: '托育员现场实践培训',
value: 16,
itemStyle: {
color: '#f6ca6c'
}
},
{
name: '托育监管人员培训',
value: 30,
itemStyle: {
color: '#8BE3FF'
}
}
];
function getParametricEquation(startRatio, endRatio, isSelected, isHovered, k, h) {
// 计算
let midRatio = (startRatio + endRatio) / 2;
let startRadian = startRatio * Math.PI * 2;
let endRadian = endRatio * Math.PI * 2;
let midRadian = midRatio * Math.PI * 2;
// 如果只有一个扇形,则不实现选中效果。
if (startRatio === 0 && endRatio === 1) {
isSelected = false;
}
// 通过扇形内径/外径的值,换算出辅助参数 k(默认值 1/3)
k = typeof k !== 'undefined' ? k : 1 / 3;
// 计算选中效果分别在 x 轴、y 轴方向上的位移(未选中,则位移均为 0)
let offsetX = isSelected ? Math.cos(midRadian) * 0.1 : 0;
let offsetY = isSelected ? Math.sin(midRadian) * 0.1 : 0;
// 计算高亮效果的放大比例(未高亮,则比例为 1)
let hoverRate = isHovered ? 1.05 : 1;
// 返回曲面参数方程
return {
u: {
min: -Math.PI,
max: Math.PI * 3,
step: Math.PI / 32
},
v: {
min: 0,
max: Math.PI * 2,
step: Math.PI / 20
},
x: function (u, v) {
if (u < startRadian) {
return offsetX + Math.cos(startRadian) * (1 + Math.cos(v) * k) * hoverRate;
}
if (u > endRadian) {
return offsetX + Math.cos(endRadian) * (1 + Math.cos(v) * k) * hoverRate;
}
return offsetX + Math.cos(u) * (1 + Math.cos(v) * k) * hoverRate;
},
y: function (u, v) {
if (u < startRadian) {
return offsetY + Math.sin(startRadian) * (1 + Math.cos(v) * k) * hoverRate;
}
if (u > endRadian) {
return offsetY + Math.sin(endRadian) * (1 + Math.cos(v) * k) * hoverRate;
}
return offsetY + Math.sin(u) * (1 + Math.cos(v) * k) * hoverRate;
},
z: function (u, v) {
if (u < -Math.PI * 0.5) {
return Math.sin(u);
}
if (u > Math.PI * 2.5) {
return Math.sin(u) * h * .1;
}
return Math.sin(v) > 0 ? 1 * h * .1 : -1;
}
};
}
// 生成模拟 3D 饼图的配置项
function getPie3D(pieData, internalDiameterRatio) {
let series = [];
let sumValue = 0;
let startValue = 0;
let endValue = 0;
let legendData = [];
let k = typeof internalDiameterRatio !== 'undefined' ? (1 - internalDiameterRatio) / (1 + internalDiameterRatio) : 1 / 3;
// 为每一个饼图数据,生成一个 series-surface 配置
for (let i = 0; i < pieData.length; i++) {
sumValue += pieData[i].value;
let seriesItem = {
name: typeof pieData[i].name === 'undefined' ? `series${i}` : pieData[i].name,
type: 'surface',
parametric: true,
wireframe: {
show: false,
},
pieData: pieData[i],
pieStatus: {
selected: false,
hovered: false,
k: k
}
};
if (typeof pieData[i].itemStyle != 'undefined') {
let itemStyle = {};
typeof pieData[i].itemStyle.color != 'undefined' ? itemStyle.color = pieData[i].itemStyle.color : null;
typeof pieData[i].itemStyle.opacity != 'undefined' ? itemStyle.opacity = pieData[i].itemStyle.opacity : null;
seriesItem.itemStyle = itemStyle;
}
series.push(seriesItem);
}
// 使用上一次遍历时,计算出的数据和 sumValue,调用 getParametricEquation 函数,
// 向每个 series-surface 传入不同的参数方程 series-surface.parametricEquation,也就是实现每一个扇形。
for (let i = 0; i < series.length; i++) {
endValue = startValue + series[i].pieData.value;
series[i].pieData.startRatio = startValue / sumValue;
series[i].pieData.endRatio = endValue / sumValue;
series[i].parametricEquation = getParametricEquation(series[i].pieData.startRatio, series[i].pieData.endRatio, false, false, k, series[i].pieData.value);
startValue = endValue;
legendData.push(series[i].name);
}
// 准备待返回的配置项,把准备好的 legendData、series 传入。
let option = {
// animation: true,
legend: [{
orient: 'vertical',
itemHeight: 5,
// data: newArr.slice(2, 4),
bottom: '17%',
left: '10%',
align: 'left',
textStyle: {
color: "#2CD9FE",
fontSize: 12,
},
itemGap: 20
},
],
tooltip: {
backgroundColor: 'RGBA(0, 49, 85, 1)',
borderColor: 'rgba(0, 151, 251, 1)',
borderWidth: 1,
borderRadius: 0,
textStyle: {
color: '#BCE9FC',
fontSize: 12,
align: 'left',
},
formatter: params => {
if (params.seriesName !== 'mouseoutSeries') {
return `${params.seriesName}<br/><span style="display:inline-block;margin-right:5px;border-radius:10px;width:10px;height:10px;background-color:${params.color};"></span>${option.series[params.seriesIndex].pieData.value}`;
}
}
},
xAxis3D: {
min: -1,
max: 1
},
yAxis3D: {
min: -1,
max: 1
},
zAxis3D: {
min: -1,
max: 1
},
grid3D: {
show: false,
boxHeight: 15,
top: '5%',
left: '18%',
viewControl: {//3d效果可以放大、旋转等,请自己去查看官方配置
alpha: 40,
// beta: 40,
rotateSensitivity: 0,
zoomSensitivity: 0,
panSensitivity: 0,
autoRotate: false,
projection: 'perspective', // 先设置为这个perspective
distance: 200
},
//后处理特效可以为画面添加高光、景深、环境光遮蔽(SSAO)、调色等效果。可以让整个画面更富有质感。
postEffect: {//配置这项会出现锯齿,请自己去查看官方配置有办法解决
enable: true,
bloom: {
enable: true,
bloomIntensity: 0.1
},
SSAO: {
enable: true,
quality: 'medium',
radius: 2
}
}
},
series: series,
};
return option;
}
function handleRender3DPie() {
const echart3 = echarts.init(document.getElementById('echarts'));
option3 = getPie3D(newArr, 0.59);
echart3.clear()
echart3.setOption(option3)
}
//调用
handleRender3DPie()