Function pickColor

_benchmarks/sample_echarts.js:69074–69090

(node, seriesModel, treeHeight)

      var paletteScope = {}; // Default color strategy

      function pickColor(node, seriesModel, treeHeight) {
        // Choose color from palette based on the first level.
        var current = node;

        while (current && current.depth > 1) {
          current = current.parentNode;
        }

        var color = seriesModel.getColorFromPalette(current.name || current.dataIndex + '', paletteScope);

        if (node.depth > 1 && typeof color === 'string') {
          // Lighter on the deeper level.
          color = lift(color, (node.depth - 1) / (treeHeight - 1) * 0.5);
        }

        return color;
      }

      ecModel.eachSeriesByType('sunburst', function (seriesModel) {
        var data = seriesModel.getData();