MigrationLayer

Example

Example Source Code

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

Name	Description	Type	Default
id	Layer ID	string	-
trailLength	Length of the trail (e.g., in number of segments, time units, or distance).	number	5
data	Source data for the layer.	string / IndexAny / AnyArr / Promise<any>	''
show	Whether the layer is visible.	boolean	true
opacity	The opacity of the layer (0-1).	number	1
pickable	Whether the layer responds to mouse events. If false, the component will not emit mouse-related events.	boolean	false
autoHighlight	When this property is true and pickable is also true, the hovered object will be highlighted.	boolean	false
highlightColor	The color to blend with the original color of the highlighted object.	string / number[]	[255, 255, 128, 1]
highlightedObjectIndex	The index of the currently highlighted element.	number	-1
onDataLoad	Callback function invoked after data loading is complete.	AnyFunc	-
dataTransform	Function to transform the data before rendering.	AnyFunc	-
transitions	Transition settings for the layer.	IndexAny	{}
sourcePosition	Source position.	AnyArr / AnyFunc	-
targetPosition	Target position.	AnyArr / AnyFunc	-
sourceColor	Source color.	string / AnyFunc	'black'
targetColor	Target color.	string / AnyFunc	'black'
width	Width.	number / AnyNumberFunc	1

EVENTS

Name	Description	Parameters

METHODS

Name	Description	Definition