3D饼/环Echarts图的实现

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所属分类:Web前端
摘要

首先确保在项目中引入了echarts和echarts-gl
“echarts”: “^4.9.0”,
“echarts-gl”: “^1.1.2”

3D饼/环Echarts图的实现

首先确保在项目中引入了echarts和echarts-gl
"echarts": "^4.9.0",
"echarts-gl": "^1.1.2"

剩下的配置好optionData的数据,交给代码

<template> 	<div class="water-eval-container"> 		<div class="cityGreenLand-charts" id="cityGreenLand-charts"> 		</div> 	</div> </template>  <script> 	import echarts from 'echarts' 	import 'echarts-gl'; 	export default { 		name: "cityGreenLand", 		components: {}, 		data() { 			return { 				optionData: [{ 					name: '林地面积统计', 					value: 10000, 					itemStyle: { 						color: '#22c4ff', 					} 				}, { 					name: '草地面积统计', 					value: 12116, 					itemStyle: { 						color: '#aaff00' 					} 				}, { 					name: '耕地地面积统计', 					value: 16616, 					itemStyle: { 						color: '#ffaaff' 					} 				}], 			} 		}, 		mounted() { 			this.$nextTick(function() { 				this.init(); 			}); 		}, 		methods: { 			init() { 				//构建3d饼状图 				let myChart = echarts.init(document.getElementById('cityGreenLand-charts')); 				// 传入数据生成 option 				this.option = this.getPie3D(this.optionData, 0.8); 				myChart.setOption(this.option); 				//是否需要label指引线,如果要就添加一个透明的2d饼状图并调整角度使得labelLine和3d的饼状图对齐,并再次setOption 				this.option.series.push({ 					name: 'pie2d', 					type: 'pie', 					labelLine:{ 						length:10, 						length2:10 					}, 					startAngle: -20 , //起始角度,支持范围[0, 360]。 					clockwise: false,//饼图的扇区是否是顺时针排布。上述这两项配置主要是为了对齐3d的样式 					radius: ['20%', '50%'], 					center: ['50%', '50%'], 					data: this.optionData, 					itemStyle:{ 						opacity:0 					} 				}); 				myChart.setOption(this.option); 				this.bindListen(myChart); 			},  			getPie3D(pieData, internalDiameterRatio) { 				//internalDiameterRatio:透明的空心占比 				let that = this; 				let series = []; 				let sumValue = 0; 				let startValue = 0; 				let endValue = 0; 				let legendData = []; 				let legendBfb = []; 				let k = 1 - internalDiameterRatio; 				pieData.sort((a, b) => { 					return (b.value - a.value); 				}); 				// 为每一个饼图数据,生成一个 series-surface 配置 				for (let i = 0; i < pieData.length; i++) { 					sumValue += pieData[i].value; 					let seriesItem = { 						name: typeof pieData[i].name === 'undefined' ? `series${i}` : pieData[i].name, 						type: 'surface', 						parametric: true, 						wireframe: { 							show: false 						}, 						pieData: pieData[i], 						pieStatus: { 							selected: false, 							hovered: false, 							k: k 						}, 						center: ['10%', '50%'] 					};  					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。 				legendData = []; 				legendBfb = []; 				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 = this.getParametricEquation(series[i].pieData.startRatio, series[i].pieData.endRatio, 						false, false, k, series[i].pieData.value); 					startValue = endValue; 					let bfb = that.fomatFloat(series[i].pieData.value / sumValue, 4); 					legendData.push({ 						name: series[i].name, 						value: bfb 					}); 					legendBfb.push({ 						name: series[i].name, 						value: bfb 					}); 				} 				let boxHeight = this.getHeight3D(series, 26);//通过传参设定3d饼/环的高度,26代表26px 				// 准备待返回的配置项,把准备好的 legendData、series 传入。 				let option = { 					legend: { 						data: legendData, 						orient: 'horizontal', 						left: 10, 						top: 10, 						itemGap: 10, 						textStyle: { 							color: '#A1E2FF', 						}, 						show: true, 						icon: "circle", 						formatter: function(param) { 							let item = legendBfb.filter(item => item.name == param)[0]; 							let bfs = that.fomatFloat(item.value * 100, 2) + "%"; 							return `${item.name}  ${bfs}`; 						} 					}, 					labelLine: { 						show: true, 						lineStyle: { 							color: '#7BC0CB' 						} 					}, 					label: { 						show: true, 						position: 'outside', 						rich: { 							b: { 								color: '#7BC0CB', 								fontSize: 12, 								lineHeight: 20 							}, 							c: { 								fontSize: 16, 							}, 						}, 						formatter: '{b|{b} n}{c|{c}}{b|  亩}',  					}, 					tooltip: { 						formatter: params => { 							if (params.seriesName !== 'mouseoutSeries' && params.seriesName !== 'pie2d') { 								let bfb = ((option.series[params.seriesIndex].pieData.endRatio - option.series[params.seriesIndex].pieData.startRatio) * 									100).toFixed(2); 								return `${params.seriesName}<br/>` + 									`<span style="display:inline-block;margin-right:5px;border-radius:10px;width:10px;height:10px;background-color:${params.color};"></span>` + 									`${ bfb }%`; 							} 						} 					}, 					xAxis3D: { 						min: -1, 						max: 1 					}, 					yAxis3D: { 						min: -1, 						max: 1 					}, 					zAxis3D: { 						min: -1, 						max: 1 					}, 					grid3D: { 						show: false, 						boxHeight: boxHeight, //圆环的高度 						viewControl: { //3d效果可以放大、旋转等,请自己去查看官方配置 							alpha: 40, //角度 							distance: 300,//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: false //自动旋转 						} 					}, 					series: series 				}; 				return option; 			},  			//获取3d丙图的最高扇区的高度 			getHeight3D(series, height) { 				series.sort((a, b) => { 					return (b.pieData.value - a.pieData.value); 				}) 				return height * 25 / series[0].pieData.value; 			},  			// 生成扇形的曲面参数方程,用于 series-surface.parametricEquation 			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; 					} 				}; 			},  			fomatFloat(num, n) { 				var f = parseFloat(num); 				if (isNaN(f)) { 					return false; 				} 				f = Math.round(num * Math.pow(10, n)) / Math.pow(10, n); // n 幂    				var s = f.toString(); 				var rs = s.indexOf('.'); 				//判定如果是整数,增加小数点再补0 				if (rs < 0) { 					rs = s.length; 					s += '.'; 				} 				while (s.length <= rs + n) { 					s += '0'; 				} 				return s; 			}, 			 			bindListen(myChart) { 				// 监听鼠标事件,实现饼图选中效果(单选),近似实现高亮(放大)效果。 				let that = this; 				let selectedIndex = ''; 				let hoveredIndex = ''; 				// 监听点击事件,实现选中效果(单选) 				myChart.on('click', function(params) { 					// 从 option.series 中读取重新渲染扇形所需的参数,将是否选中取反。 					let isSelected = !that.option.series[params.seriesIndex].pieStatus.selected; 					let isHovered = that.option.series[params.seriesIndex].pieStatus.hovered; 					let k = that.option.series[params.seriesIndex].pieStatus.k; 					let startRatio = that.option.series[params.seriesIndex].pieData.startRatio; 					let endRatio = that.option.series[params.seriesIndex].pieData.endRatio; 					// 如果之前选中过其他扇形,将其取消选中(对 option 更新) 					if (selectedIndex !== '' && selectedIndex !== params.seriesIndex) { 						that.option.series[selectedIndex].parametricEquation = that.getParametricEquation(that.option.series[ 								selectedIndex].pieData 							.startRatio, that.option.series[selectedIndex].pieData.endRatio, false, false, k, that.option.series[ 								selectedIndex].pieData 							.value); 						that.option.series[selectedIndex].pieStatus.selected = false; 					} 					// 对当前点击的扇形,执行选中/取消选中操作(对 option 更新) 					that.option.series[params.seriesIndex].parametricEquation = that.getParametricEquation(startRatio, endRatio, 						isSelected, 						isHovered, k, that.option.series[params.seriesIndex].pieData.value); 					that.option.series[params.seriesIndex].pieStatus.selected = isSelected; 					// 如果本次是选中操作,记录上次选中的扇形对应的系列号 seriesIndex 					isSelected ? selectedIndex = params.seriesIndex : null; 					// 使用更新后的 option,渲染图表 					myChart.setOption(that.option); 				}); 				// 监听 mouseover,近似实现高亮(放大)效果 				myChart.on('mouseover', function(params) { 					// 准备重新渲染扇形所需的参数 					let isSelected; 					let isHovered; 					let startRatio; 					let endRatio; 					let k; 					// 如果触发 mouseover 的扇形当前已高亮,则不做操作 					if (hoveredIndex === params.seriesIndex) { 						return; 						// 否则进行高亮及必要的取消高亮操作 					} else { 						// 如果当前有高亮的扇形,取消其高亮状态(对 option 更新) 						if (hoveredIndex !== '') { 							// 从 option.series 中读取重新渲染扇形所需的参数,将是否高亮设置为 false。 							isSelected = that.option.series[hoveredIndex].pieStatus.selected; 							isHovered = false; 							startRatio = that.option.series[hoveredIndex].pieData.startRatio; 							endRatio = that.option.series[hoveredIndex].pieData.endRatio; 							k = that.option.series[hoveredIndex].pieStatus.k; 							// 对当前点击的扇形,执行取消高亮操作(对 option 更新) 							that.option.series[hoveredIndex].parametricEquation = that.getParametricEquation(startRatio, endRatio, 								isSelected, 								isHovered, k, that.option.series[hoveredIndex].pieData.value); 							that.option.series[hoveredIndex].pieStatus.hovered = isHovered; 							// 将此前记录的上次选中的扇形对应的系列号 seriesIndex 清空 							hoveredIndex = ''; 						} 						// 如果触发 mouseover 的扇形不是透明圆环,将其高亮(对 option 更新) 						if (params.seriesName !== 'mouseoutSeries' && params.seriesName !== 'pie2d') { 							// 从 option.series 中读取重新渲染扇形所需的参数,将是否高亮设置为 true。 							isSelected = that.option.series[params.seriesIndex].pieStatus.selected; 							isHovered = true; 							startRatio = that.option.series[params.seriesIndex].pieData.startRatio; 							endRatio = that.option.series[params.seriesIndex].pieData.endRatio; 							k = that.option.series[params.seriesIndex].pieStatus.k; 							// 对当前点击的扇形,执行高亮操作(对 option 更新) 							that.option.series[params.seriesIndex].parametricEquation = that.getParametricEquation(startRatio, endRatio, 								isSelected, isHovered, k, that.option.series[params.seriesIndex].pieData.value + 5); 							that.option.series[params.seriesIndex].pieStatus.hovered = isHovered; 							// 记录上次高亮的扇形对应的系列号 seriesIndex 							hoveredIndex = params.seriesIndex; 						} 						// 使用更新后的 option,渲染图表 						myChart.setOption(that.option); 					} 				}); 				// 修正取消高亮失败的 bug 				myChart.on('globalout', function() { 					// 准备重新渲染扇形所需的参数 					let isSelected; 					let isHovered; 					let startRatio; 					let endRatio; 					let k; 					if (hoveredIndex !== '') { 						// 从 option.series 中读取重新渲染扇形所需的参数,将是否高亮设置为 true。 						isSelected = that.option.series[hoveredIndex].pieStatus.selected; 						isHovered = false; 						k = that.option.series[hoveredIndex].pieStatus.k; 						startRatio = that.option.series[hoveredIndex].pieData.startRatio; 						endRatio = that.option.series[hoveredIndex].pieData.endRatio; 						// 对当前点击的扇形,执行取消高亮操作(对 option 更新) 						that.option.series[hoveredIndex].parametricEquation = that.getParametricEquation(startRatio, endRatio, 							isSelected, 							isHovered, k, that.option.series[hoveredIndex].pieData.value); 						that.option.series[hoveredIndex].pieStatus.hovered = isHovered; 						// 将此前记录的上次选中的扇形对应的系列号 seriesIndex 清空 						hoveredIndex = ''; 					} 					// 使用更新后的 option,渲染图表 					myChart.setOption(that.option); 				}); 			} 		} 	} </script> <style lang="less"> 	.water-eval-container { 		width: 100%; 		height: 100%; 	} 	.cityGreenLand-charts { 		height: 200px; 		width: 400px; 	} </style> 

以上代码复制拿走就能直接用,还不赶快试试