const createSvg = ({radius, startAngle, endAngle, shadowColor, shadowBlur}) => { const startX = radius * (1 + Math.cos(startAngle)); const startY = radius * (1 - Math.sin(startAngle)); const endX = radius * (1 + Math.cos(endAngle)); const endY = radius * (1 - Math.sin(endAngle)); const ret = [`M${radius} ${radius}`]; ret.push(`L${startX} ${startY}`); ret.push(`A${radius} ${radius} 0 ${Math.abs(endAngle - startAngle) > Math.PI ? 1 : 0} 1 ${endX} ${endY}`); ret.push('Z'); const rectPath = ret.join(' '); return (` `); }; const cretateSvgUrl = (svgOption) => { const svgString = createSvg(svgOption); const svg = new Blob([svgString], {type: "image/svg+xml;charset=utf-8"}); const DOMURL = window.URL || window.webkitURL || window; const insetShadowUrl = DOMURL.createObjectURL(svg); return insetShadowUrl; }; const dataSet = [ ['项目1', '项目2','项目3', '项目4', '项目5'], [100, 90, 80, 66, 90], ]; const radius = '56%'; const center = ['50%', '50%']; const dataToPie = (data) => { const accData = data.reduce((acc, v, i) => { const prev = i === 0 ? 0 : acc[i - 1]; acc.push(prev + v); return acc; }, []); const total = accData[data.length - 1]; return accData.map((t, idx) => { const endAngle = Math.PI * 0.5 - t / total * Math.PI * 2; const startAngle = endAngle + data[idx] / total * Math.PI * 2; return { startAngle, endAngle, value: data[idx] }; }); }; const pieData = dataToPie(dataSet[1]); option = { backgroundColor: '#000000', tooltip: { // trigger: 'axis', // show: true }, polar: { radius, center, }, angleAxis: { type: 'category', clockwise: false, boundaryGap: false, splitLine: { show: false, }, axisLine: { show: false } }, radiusAxis: { type: 'value', max: 100, splitLine: { show: false, }, axisTick: { show: false, }, axisLabel: { show: false, }, }, series: [ { type: 'custom', name: 's1-inset-shadow', silent: true, coordinateSystem : 'polar', data: dataSet[1], renderItem: (params, api) => { const R = params.coordSys.r; const cx = params.coordSys.cx; const cy = params.coordSys.cy; const x = cx - R; const y = cy - R; const width = 2 * R; const height = 2 * R; const value0 = api.value(0); const value1 = api.value(1); const pie = pieData[value1]; console.log(params, pie) return { type: 'image', style: { image: cretateSvgUrl({ radius: R, startAngle: pie.startAngle, endAngle: pie.endAngle, shadowColor: 'rgba(13, 178, 255, 1)', shadowBlur: 30 }), x, y, width, height, }, }; }, }, { type: 'pie', data: dataSet[1], radius, center, itemStyle: { color: 'transparent', borderColor: 'yellowgreen' } }, ] };

饼图内阴影