antv-l7/stories/mask/components/heatmap.tsx

import {
  LineLayer,
  Scene,
  MaskLayer,
  HeatmapLayer,
  PointLayer,
} from '@antv/l7';
import { GaodeMap } from '@antv/l7-maps';
import * as React from 'react';

export default class MaskPoints extends React.Component {
  // @ts-ignore
  private scene: Scene;

  public componentWillUnmount() {
    this.scene.destroy();
  }

  public async componentDidMount() {
    const scene = new Scene({
      id: 'map',
      stencil: true,
      map: new GaodeMap({
        center: [120.165, 30.26],
        pitch: 0,
        zoom: 2,
        style: 'dark',
      }),
    });
    this.scene = scene;
    scene.addImage(
      '00',
      'https://gw.alipayobjects.com/zos/basement_prod/604b5e7f-309e-40db-b95b-4fac746c5153.svg',
    );
    const maskData = {
      type: 'FeatureCollection',
      features: [
        {
          type: 'Feature',
          geometry: {
            type: 'MultiPolygon',
            coordinates: [
              [
                [
                  [125.15625000000001, 8.407168163601076],
                  [116.54296874999999, -21.289374355860424],
                  [156.26953125, -20.632784250388013],
                  [150.29296875, 2.1088986592431382],
                ],
              ],
              [
                [
                  [78.57421875, 46.92025531537451],
                  [51.67968749999999, 37.020098201368114],
                  [87.890625, 28.76765910569123],
                ],
              ],
            ],
          },
        },
      ],
    };

    scene.on('loaded', () => {
      fetch(
        'https://gw.alipayobjects.com/os/basement_prod/d3564b06-670f-46ea-8edb-842f7010a7c6.json',
      )
        .then((res) => res.json())
        .then((data) => {
          // const heatmapLayer = new HeatmapLayer({ mask: true, maskInside: true })
          const heatmapLayer = new HeatmapLayer({
            mask: true,
            maskInside: false,
            maskfence: maskData,
            maskColor: '#fff',
            maskOpacity: 0.5,
          })
            .source(data)
            .shape('heatmap3D') // heatmap3D heatmap
            .size('mag', [0, 1.0]) // weight映射通道
            .style({
              intensity: 2,
              radius: 20,
              opacity: 1.0,
              rampColors: {
                colors: [
                  '#FF4818',
                  '#F7B74A',
                  '#FFF598',
                  '#91EABC',
                  '#2EA9A1',
                  '#206C7C',
                ].reverse(),
                positions: [0, 0.2, 0.4, 0.6, 0.8, 1.0],
              },
            });
          scene.addLayer(heatmapLayer);
        });
    });
  }

  public render() {
    return (
      <>
        <div
          id="map"
          style={{
            position: 'absolute',
            top: 0,
            left: 0,
            right: 0,
            bottom: 0,
          }}
        />
      </>
    );
  }
}