superset2/superset/assets/visualizations/deckgl/layers/scatter.jsx

import { ScatterplotLayer } from 'deck.gl';

import { getColorFromScheme, hexToRGB } from '../../../javascripts/modules/colors';
import { unitToRadius } from '../../../javascripts/modules/geo';

export default function getLayer(formData, payload) {
  const fd = formData;
  const c = fd.color_picker || { r: 0, g: 0, b: 0, a: 1 };
  const fixedColor = [c.r, c.g, c.b, 255 * c.a];

  const data = payload.data.features.map((d) => {
    let radius = unitToRadius(fd.point_unit, d.radius) || 10;
    if (fd.multiplier) {
      radius *= fd.multiplier;
    }
    let color;
    if (fd.dimension) {
      color = hexToRGB(getColorFromScheme(d.cat_color, fd.color_scheme), c.a * 255);
    } else {
      color = fixedColor;
    }
    return {
      ...d,
      radius,
      color,
    };
  });
  return new ScatterplotLayer({
    id: `scatter-layer-${fd.slice_id}`,
    data,
    pickable: true,
    fp64: true,
    outline: false,
  });
}