迁徙图（MigrationLayer）

示例

示例源码

import React, { useEffect, useRef, useState } from 'react'
import ReactDOM from 'react-dom'
import { MbMap, MbTiandituLayer } from '@mapbox-react/core'
import { MbArcLayer } from '@mapbox-react/deck-layers'
import { MbMigrationLayer } from '@mapbox-react/effect-layers'

const App = () => {
  const [mapCenter] = useState([116, 39])
  const [zoom, setZoom] = useState(3)
  const [pitch, setPitch] = useState(60)
  const mapInst = useRef<any>()

  const [data, setData] = useState<any[]>([])
  const [width, setWidth] = useState(3)

  function getRandomArbitrary(min: number, max: number) {
    return Math.random() * (max - min) + min
  }

  const loadData = () => {
    const temp: any[] = []
    for (let i = 0; i < 100; i++) {
      temp.push({
        to: [getRandomArbitrary(100, 132), getRandomArbitrary(25, 50)],
      })
    }
    setData(temp)
  }

  useEffect(() => {
    loadData()
  }, [])

  return (
    <div className="map-wrapper">
      <MbMap ref={mapInst} center={mapCenter} zoom={zoom} pitch={pitch}>
        <MbArcLayer
          data={data}
          sourcePosition={[116, 39]}
          targetPosition={(d) => d.to}
          width={width}
          height={0.8}
          sourceColor="rgb(255, 0, 128)"
          targetColor="rgb(0, 200, 255)"
        />
        <MbMigrationLayer
          data={data}
          sourcePosition={[116, 39]}
          targetPosition={(d) => d.to}
          width={width}
          height={0.8}
          sourceColor="#fff"
          targetColor="#fff"
          trailLength={5}
        />
      </MbMap>
    </div>
  )
}

ReactDOM.render(<App />, document.querySelector('#root'))

API

PROPS

名称	描述	类型	默认值
id	图层Id	string	-
trailLength	-	number	5
data	图层源数据	string / IndexAny / AnyArr / Promise<any>	''
show	是否显示	boolean	true
opacity	透明度	number	1
pickable	图层是否会响应鼠标事件，若为false，则组件不会emit鼠标相关事件	boolean	false
autoHighlight	本属性为true且pickable为true时，则会将鼠标悬浮选中的对象设为高亮	boolean	false
highlightColor	要与高亮对象原始颜色进行混合(blend)的颜色值	string / number[]	[255, 255, 128, 1]
highlightedObjectIndex	高亮元素序号	number	-1
onDataLoad	-	AnyFunc	-
dataTransform	-	AnyFunc	-
transitions	-	IndexAny	{}
sourcePosition	源位置	AnyArr / AnyFunc	-
targetPosition	目的位置	AnyArr / AnyFunc	-
sourceColor	源颜色	string / AnyFunc	black
targetColor	目标颜色	string / AnyFunc	black
width	宽度	number / AnyNumberFunc	1

EVENTS

名称	描述	参数

METHODS

名称	描述	定义