FBX

Example

Example Source Code

import React, { useCallback, useEffect, useRef, useState } from 'react'
import ReactDOM from 'react-dom'
import * as THREE from 'three'
import { FBXLoader } from 'FBXLoader'
import { MbMap, MbTiandituLayer } from '@mapbox-react/core'

const App = () => {
  const [mapCenter] = useState([116.3466, 39.8704])
  const [zoom, setZoom] = useState(16)
  const [pitch, setPitch] = useState(45)
  const mapInst = useRef<any>()

  let map: any
  const altitude = 0
  let mixers: THREE.AnimationMixer[] = []

  const mapCreated = (mapbox: any) => {
    map = mapbox
    mixers = []
  }
  const add3DLayer = () => {
    loaderModels()
  }
  const loaderModels = () => {
    const modelAsMercatorCoordinate =
      map.mapboxgl.MercatorCoordinate.fromLngLat(mapCenter, altitude)

    // transformation parameters to position, rotate and scale the 3D model onto the map
    const modelTransform = {
      translateX: modelAsMercatorCoordinate.x,
      translateY: modelAsMercatorCoordinate.y,
      translateZ: modelAsMercatorCoordinate.z,
      /* Since our 3D model is in real world meters, a scale transform needs to be
       * applied since the CustomLayerInterface expects units in MercatorCoordinates.
       */
      scale: modelAsMercatorCoordinate.meterInMercatorCoordinateUnits(),
    }

    const loader = new FBXLoader()
    loader.load(
      `https://mapbox-web.github.io/mapbox-react/fbx/Samba Dancing.fbx`,
      (dancer) => {
        // dancer.scale.multiplyScalar(1)
        const mixer = new THREE.AnimationMixer(dancer)
        const action = mixer.clipAction(dancer.animations[0])
        action.play()

        mixers.push(mixer)

        addThreeLayer(modelTransform, dancer)
      }
    )
  }
  const addThreeLayer = (modelTransform, dancer) => {
    const threeLayer = {
      id: '3d-model',
      type: 'custom',
      renderingMode: '3d',
      camera: null as unknown as THREE.PerspectiveCamera,
      scene: null as unknown as THREE.Scene,
      renderer: null as unknown as THREE.WebGLRenderer,
      clock: null as unknown as THREE.Clock,
      onAdd(map, gl) {
        this.camera = new THREE.PerspectiveCamera()
        this.scene = new THREE.Scene()
        this.clock = new THREE.Clock()

        dancer.rotation.x = Math.PI / 2
        this.scene.add(dancer)

        {
          const skyColor = 0xb1e1ff // light blue
          const groundColor = 0xb97a20 // brownish orange
          const intensity = 3
          const light = new THREE.HemisphereLight(
            skyColor,
            groundColor,
            intensity
          )
          this.scene.add(light)
        }

        // use the Mapbox GL JS map canvas for three.js
        this.renderer = new THREE.WebGLRenderer({
          canvas: map.getCanvas(),
          context: gl,
          antialias: true,
        })

        this.renderer.autoClear = false
      },
      render(gl, matrix) {
        const m = new THREE.Matrix4().fromArray(matrix)
        const l = new THREE.Matrix4()
          .makeTranslation(
            modelTransform.translateX,
            modelTransform.translateY,
            modelTransform.translateZ
          )
          .scale(
            new THREE.Vector3(
              modelTransform.scale,
              -modelTransform.scale,
              modelTransform.scale
            )
          )

        this.camera.projectionMatrix = m.clone().multiply(l)
        this.camera.matrixWorldInverse = new THREE.Matrix4()
        this.renderer.resetState()

        const delta = this.clock.getDelta()
        for (const mixer of mixers) {
          mixer.update(delta)
        }

        this.renderer.render(this.scene, this.camera)

        map.triggerRepaint()
      },
    }
    map.addLayer(threeLayer as CustomLayerInterface)
  }

  return (
    <div className="map-wrapper">
      <MbMap
        ref={mapInst}
        center={mapCenter}
        zoom={zoom}
        pitch={pitch}
        onCreated={mapCreated}
      >
        <MbTiandituLayer types={['vec', 'cva']} onCreated={add3DLayer} />
      </MbMap>
    </div>
  )
}

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