echarts这个球中发红光的代码是由哪里控制的？

Question

var config = {
    color: '#c0101a',
    levels: 1,
    intensity: 4,
    threshold: 0.01
}

var canvas = document.createElement('canvas');
canvas.width = 4096;
canvas.height = 2048;
context = canvas.getContext("2d");

context.lineWidth = 0.5;
context.strokeStyle = config.color;
context.fillStyle = config.color;
context.shadowColor = config.color;

image('/asset/get/s/data-1491837512042-rJlLfXYax.jpg').then(function(image) {
  var m = image.height,
      n = image.width,
      values = new Array(n * m),
      contours = d3.contours().size([n, m]).smooth(true),
      projection = d3.geoIdentity().scale(canvas.width / n),
      path = d3.geoPath(projection, context);

//   StackBlur.R(image, 5);

  for (var j = 0, k = 0; j < m; ++j) {
    for (var i = 0; i < n; ++i, ++k) {
      values[k] = image.data[(k << 2)] / 255;
    }
  }

  var opt = {
    image: canvas
  }

  var results = [];
  function update(threshold, levels) {
    context.clearRect(0, 0, canvas.width, canvas.height);
    var thresholds = [];
    for (var i = 0; i < levels; i++) {
        thresholds.push((threshold + 1 / levels * i) % 1);
    }
    results = contours.thresholds(thresholds)(values);
    redraw();
  }

  function redraw() {
    results.forEach(function (d, idx) {
        context.beginPath();
        path(d);
        context.globalAlpha = 1;
        context.stroke();
        if (idx > config.levels / 5 * 3) {
            context.globalAlpha = 0.01;
            context.fill();
        }
    });
    opt.onupdate();
  }
  d3.timer(function(t) {
    var threshold = (t % 10000) / 10000;
    update(threshold, 1);
  });

  initCharts(opt);

  update(config.threshold, config.levels);

});

function image(url) {
  return new Promise(function(resolve) {
    var image = new Image;
    image.src = url;
    image.onload = function() {
      var canvas = document.createElement("canvas");
      canvas.width = image.width / 8;
      canvas.height = image.height / 8;
      var context = canvas.getContext("2d");
      context.drawImage(image, 0, 0, canvas.width, canvas.height);
      resolve(context.getImageData(0, 0, canvas.width, canvas.height));
    };
  });
}

function initCharts(opt) {
    var contourChart = echarts.init(document.createElement('canvas'), null, {
        width: 4096,
        height: 2048
    });

    var img = new echarts.graphic.Image({
        style: {
            image: opt.image,
            x: -1,
            y: -1,
            width: opt.image.width + 2,
            height: opt.image.height + 2
        }
    });
    contourChart.getZr().add(img);

    opt.onupdate = function () {
        img.dirty();
    }

    myChart.setOption({
        backgroundColor: '#000',
        globe: {
    
            environment: '/asset/get/s/data-1491837999815-H1_44Qtal.jpg',
    
            heightTexture: '/asset/get/s/data-1491837512042-rJlLfXYax.jpg',
    
            displacementScale: 0.05,
            displacementQuality: 'high',
    
            baseColor: '#000',
    
            shading: 'realistic',
            realisticMaterial: {
                roughness: 0.2,
                metalness: 0
            },
    
            postEffect: {
                enable: true,
                depthOfField: {
                    // enable: true
                }
            },
            light: {
                ambient: {
                    intensity: 0
                },
                main: {
                    intensity: 0.1,
                    shadow: false
                },
                ambientCubemap: {
                    texture: '/asset/get/s/data-1491837984109-r1u7NmY6e.hdr',
                    exposure: 1,
                    diffuseIntensity: 0.5,
                    specularIntensity: 2
                }
            },
            viewControl: {
                autoRotate: false
            },
    
            layers: [{
                type: 'blend',
                blendTo: 'emission',
                texture: contourChart,
                intensity: config.intensity
            }]
        }
    });
}