text: // Copyright (c) 2020 Uber Technologies, Inc.
  //
  // Permission is hereby granted, free of charge, to any person obtaining a copy
  // of this software and associated documentation files (the "Software"), to deal
  // in the Software without restriction, including without limitation the rights
  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  // copies of the Software, and to permit persons to whom the Software is
  // furnished to do so, subject to the following conditions:
  //
  // The above copyright notice and this permission notice shall be included in
  // all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  // THE SOFTWARE.
  
  import {ScatterplotLayer} from 'deck.gl';
  import {editShader} from 'deckgl-layers/layer-utils/shader-utils';
  
  function addBrushingVsShader(vs) {
    return editShader(
      vs,
      'scatterplot brushing vs',
      'outerRadiusPixels += outline * strokeWidth / 2.0;',
      'outerRadiusPixels = brushing_getRadius(instancePositions, outerRadiusPixels + outline * strokeWidth / 2.0);'
    );
  }
  
  const defaultProps = {
    ...ScatterplotLayer.defaultProps,
    enableBrushing: true,
    // brush radius in meters
    brushRadius: 100000,
    mousePosition: [0, 0],
    outsideBrushRadius: 0
  };
  
  export default class ScatterplotBrushingLayer extends ScatterplotLayer {
  
    getShaders() {
      const shaders = super.getShaders();
      return {
        vs: addBrushingVsShader(shaders.vs),
        fs: shaders.fs,
        modules: shaders.modules.concat(['brushing'])
      };
    }
    draw(opts) {
      const {uniforms} = opts;
      const {
        brushRadius,
        enableBrushing,
        mousePosition,
        outsideBrushRadius
      } = this.props;
  
      // add uniforms
      super.draw({
        ...opts,
        uniforms: {
          ...uniforms,
          brushing_uBrushRadius: brushRadius,
          brushing_uOutsideBrushRadius: outsideBrushRadius,
          brushing_uMousePosition: mousePosition
            ? new Float32Array(this.unproject(mousePosition))
            : defaultProps.mousePosition,
          brushing_uEnableBrushing: enableBrushing ? 1 : 0
        }
      });
    }
  }
  
  ScatterplotBrushingLayer.layerName = 'ScatterplotBrushingLayer';
  ScatterplotBrushingLayer.defaultProps = defaultProps;
  