echarts画风向杆

1.安装echarts

2.引入echarts

4.获取数据，转换数据格式

windProfile.title.text = `${moment(time.searchTime[0], ‘YYYY-MM-DD HH:mm:ss’).format(

‘YYYY-MM-DD HH:mm’

)}-${moment(time.searchTime[1], ‘YYYY-MM-DD HH:mm:ss’).format(‘YYYY-MM-DD HH:mm’)}——水平风风羽图`

data.forEach(item => {

windProfile.xAxis.data.push(moment(item.time, ‘YYYY-MM-DD HH:mm:ss’).format(‘HH:mm’))

arr = item.fengKuoXianItems.filter(

i => heightRange.less * 1000 <= i.height && i.height <= heightRange.greater * 1000

)

arr.forEach(item1 => {

if (item1.direction && item1.speed) {

windProfile.series[0].data.push({

value: [

moment(item.time, ‘YYYY-MM-DD HH:mm:ss’).format(‘HH:mm’),

item1.height,

transformationSpeed(item1.speed),

item1.direction > 9999 ‘’ : getWindPower(item1.direction),

item1.speed > 9999 ‘’ : getWindSpeed(item1.speed),

item1.speed > 9999 ‘’ : item1.speed.toFixed(2)

],

label: {

rotate: -item1.direction,

color: `rgba(${getColor(colorData.value[0].stops, item1.speed).stop.join(‘,’)})`

}

})

}

})

})

1）转换字体根据风速转字体

const transformation = [

//风速转字体

[1, ‘m’, 0],

[3, ‘k’, 1],

[5, ‘1’, 2],

[7, ‘2’, 3],

[9, ‘3’, 4],

[11, ‘4’, 5],

[13, ‘5’, 6],

[15, ‘6’, 7],

[17, ‘7’, 8],

[19, ‘n’, 9],

[21, ‘8’, 10],

[23, ‘9’, 11],

[25, ‘:’, 12],

[27, ‘;’, 13],

[29, ‘<’, 14],

[31, ‘=’, 15],

[33, ‘>’, 16],

[35, ‘’, 17],

[37, ‘@’, 18],

[39, ‘A’, 19],

[41, ‘B’, 20],

[43, ‘C’, 21],

[45, ‘D’, 22],

[47, ‘E’, 23],

[49, ‘F’, 24],

[51, ‘G’, 25],

[53, ‘H’, 26],

[55, ‘I’, 27],

[57, ‘J’, 28],

[999, ‘K’, 28]

]

//根据风速转字体

const transformationSpeed = speed => {

for (let t = 0; t < transformation.length; t++) if (Number(speed) <= transformation[t][0]) return transformation[t][1]

return ‘0’

}

注意修改echarts里series的配置项

2）转换风向

const windPower = [

//风向

[11.25, ‘北风’],

[33.75, ‘东北风’],

[56.25, ‘东北风’],

[78.75, ‘东北风’],

[101.25, ‘东风’],

[123.75, ‘东南风’],

[146.25, ‘东南风’],

[168.75, ‘东南风’],

[191.25, ‘南风’],

[213.75, ‘西南风’],

[236.25, ‘西南风’],

[258.75, ‘西南风’],

[281.25, ‘西风’],

[303.75, ‘西北风’],

[326.25, ‘西北风’],

[348.75, ‘西北风’],

[1e3, ‘西北风’]

]

// 获取风向

const getWindPower = e => {

for (let t = 0; t < windPower.length; t++) if (e < windPower[t][0]) return windPower[t][1]

return ‘无风’

}

3）转换风速

const windSpeed = [

//风速

[0.2, 0],

[1.5, 1],

[3.3, 2],

[5.4, 3],

[7.9, 4],

[10.7, 5],

[13.8, 6],

[17.1, 7],

[20.7, 8],

[24.4, 9],

[28.4, 10],

[32.6, 11],

[36.9, 12],

[41.4, 13],

[46.1, 14],

[50.9, 15],

[56, 16],

[61.2, 17]

]

//获取风速

const getWindSpeed = e => {

for (let t = 0; t < windSpeed.length; t++) if (e < windSpeed[t][0]) return windSpeed[t][1].toFixed(2)

return ‘0’

}

4）转换风字体颜色

const colorData = ref([

{

stops: [

{ value: 0.2, stop: [176, 224, 248, 1] },

{ value: 2.6, stop: [144, 208, 248, 1] },

{ value: 3.4, stop: [120, 184, 248, 1] },

{ value: 5.5, stop: [80, 160, 240, 1] },

{ value: 8, stop: [60, 120, 220, 1] },

{ value: 10.8, stop: [40, 100, 200, 1] },

{ value: 13.9, stop: [0, 176, 8, 1] },

{ value: 17.2, stop: [248, 248, 0, 1] },

{ value: 20.8, stop: [248, 168, 0, 1] },

{ value: 24.5, stop: [248, 80, 0, 1] },

{ value: 28.5, stop: [248, 0, 0, 1] },

{ value: 32.7, stop: [248, 24, 80, 1] },

{ value: 37, stop: [240, 48, 152, 1] },

{ value: 46.2, stop: [232, 80, 232, 1] },

{ value: 51, stop: [224, 72, 72, 1] },

{ value: 56.1, stop: [200, 56, 56, 1] },

{ value: 61.3, stop: [160, 24, 32, 1] }

],

fieldName: ‘wind’

}

])

// 风字体颜色

const getColor = (e, speed) => {

let n = e[e.length - 1]

const i = e.find(e => {

if (speed <= e.value) return (n = e), n

})

return i && (n = i), n

}