标签：const echart series return itemStyle pieData 3D Math 之饼
html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Echarts Demo</title>
<script src="../echart/echarts.min.js"></script><!-- echart官网下载 -->
<script src="../echart/echarts-gl.min.js"></script><!-- echart官网下载 -->
<script src="./echart-pie.js"></script><!-- 下方JavaScript文件 -->
</head>
<body>
<div id="main" style="width: 600px;height:400px;"></div>
</body>
<script type="text/javascript">
const optionsData = [
{
name: 'aa',
value: 15,
itemStyle: {
color: '#5c7cfa',
// opacity: 1,
},
},
{
name: 'cc',
value: 15,
itemStyle: {
color: '#20c997',
// opacity: 1,
},
},
{
name: 'bb',
value: 23,
itemStyle: {
color: '#ff6b6b',
// opacity: 1,
},
},
];
const option = {
legend: {
show: true
}
}
$echartPie('main', optionsData, option)
</script>
</html>
javascript
/** 使用示例
* const optionsData = [
{
name: 'aa',
value: 15,
itemStyle: {
color: '#5c7cfa',
// opacity: 1,
},
},
{
name: 'cc',
value: 15,
itemStyle: {
color: '#20c997',
// opacity: 1,
},
},
{
name: 'bb',
value: 23,
itemStyle: {
color: '#ff6b6b',
// opacity: 1,
},
},
];
const option = {
legend: {
show: true
}
}
$echartPie('main', optionsData, option)
*/
((window) => {
let echartPie
echartPie = function (selector, optionsData = [], setOption) {
return echartPie.fn.init(selector, optionsData, setOption)
}
echartPie.fn = echartPie.prototype = {
series: [],
/**
*
* @param {*} optionsData 系列选项内容
* @param {*} optionCallback 回调函数
*/
init(selector, optionsData = [], setOption) {
if (Array.isArray(optionsData) && optionsData.length) {
var myChart = echarts.init(document.getElementById(selector));
this.series = this.getPie3D(optionsData, 0.8, 240, 28, 26, 0.5)
this.series.push({
// name: 'pie2d',
// 显示每个块信息
// type: 'pie',
// label: {
// opacity: 1,
// fontSize: 13,
// lineHeight: 20,
// },
// labelLine: {
// length: 30,
// length2: 30,
// },
startAngle: -30, //起始角度，支持范围[0, 360]。
clockwise: false, //饼图的扇区是否是顺时针排布。上述这两项配置主要是为了对齐3d的样式
radius: ['20%', '50%'],
center: ['50%', '50%'],
data: optionsData,
itemStyle: {
opacity: 0,
},
})
// 默认配置，后面通过回调函数扩充配置
const option = {
title: {
text: '3D 饼图',
x: 'center',
top: '20',
textStyle: {
color: '#fff',
fontSize: 22,
},
},
backgroundColor: 'transparent',
labelLine: {
show: false,
lineStyle: {
color: '#7BC0CB',
},
},
label: {
show: false,
position: 'outside',
formatter: '{b} \n{c} {d}%',
},
xAxis3D: {
min: -1,
max: 1,
},
yAxis3D: {
min: -1,
max: 1,
},
zAxis3D: {
min: -1,
max: 1,
},
grid3D: {
show: false,
boxHeight: 30, // 三维笛卡尔坐标系在三维场景中的高度
viewControl: {
alpha: 40,
beta: 40,
distance: 500, //调整视角到主体的距离，类似调整zoom
rotateSensitivity: 0, // 设置为0无法旋转
zoomSensitivity: 0, // 设置为0无法缩放
panSensitivity: 0, // 设置为0无法平移
autoRotate: true, // 自动旋转
},
},
series: this.series,
}
myChart && myChart.setOption({ ...option, ...setOption || {} });
}
},
getParametricEquation(startRatio, endRatio, isSelected, isHovered, k, h) {
// 计算
const midRatio = (startRatio + endRatio) / 2;
const startRadian = startRatio * Math.PI * 2;
const endRadian = endRatio * Math.PI * 2;
const 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 = 1;
// 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）
const offsetX = isSelected ? Math.cos(midRadian) * 0.1 : 0;
const 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）
const 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 * 0.1;
}
return Math.sin(v) > 0 ? 1 * h * 0.1 : -1;
},
};
},
getPie3D(pieData, internalDiameterRatio, distance, alpha, pieHeight, opacity = 1) {
const series = [];
let sumValue = 0;
let startValue = 0;
let endValue = 0;
const legendData = [];
const 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 += 1) {
sumValue += pieData[i].value;
const 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') {
const itemStyle = {};
if (typeof pieData[i].itemStyle.color !== 'undefined') {
itemStyle.color = pieData[i].itemStyle.color;
}
if (typeof pieData[i].itemStyle.opacity !== 'undefined') {
itemStyle.opacity = pieData[i].itemStyle.opacity;
}
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 += 1) {
endValue = startValue + series[i].pieData.value;
series[i].pieData.startRatio = startValue / sumValue;
series[i].pieData.endRatio = endValue / sumValue;
series[i].parametricEquation = this.getParametricEquation(
series[i].pieData.startRatio,
series[i].pieData.endRatio,
false,
false,
k,
series[i].pieData.value
);
startValue = endValue;
legendData.push(series[i].name);
}
return series;
}
}
echartPie.fn.init.prototype = echartPie.fn;
window.$echartPie = echartPie
})(window)
标签：const,
echart,
series,
return,
itemStyle,
pieData,
3D,
Math,
之饼
From： https://www.cnblogs.com/letgofishing/p/16942196.html