Arcgis api for JS | GraphicsLayer图层生成热力图

ArcGIS API渲染热力图是在FeatureLayer里，怎么渲染呢？

热力图有个专门的渲染器：HeatmapRenderer，将样式赋给该渲染器，然后渲染器、点数据等参与FeatureLayer的构造，就可以了。

现在有GraphicsLayer的点图层数据(必须全部是点图形)，如何快速转化为热力图图层？

代码如下

// Date:2023-02-11 02:12
import FeatureLayer from "@arcgis/core/layers/FeatureLayer";
const createHeatMap = () => {
  //热力图渲染
  let heatmapRenderer = {
    type: "heatmap",
    colorStops: [
      { ratio: 0, color: "rgba(0, 255, 150, 0)" },
      { ratio: 0.6, color: "rgb(250, 250, 0)" },
      { ratio: 0.85, color: "rgb(250, 150, 0)" },
      { ratio: 0.95, color: "rgb(255, 50, 0)" },
    ],
    blurRadius: 10,
    maxPixelIntensity: 10,
    minPixelIntensity: 0,
  };
  let layer = G.map.layers.items[0];// GraphicsLayer点类型图层
  if(!layer)return;
  heatMapLayer = new FeatureLayer({
    source: layer.graphics,
    fields: [
      {
        name: "ObjectID",
        alias: "ObjectID",
        type: "oid",
      },
    ],
    objectIdField: "ObjectID",
    geometryType: "point",
    renderer:heatmapRenderer
  });
  map.add(heatMapLayer)
};