                      param[otherDimIdx] = api.value(encode[coordDims[otherDimIdx]][2]);
                        var lowPoint = api.coord(param);
                        var halfWidth = 5;

                        var style = api.style({
                            stroke: api.visual('color'),
                            fill: null
                        });

                        children.push({
                            type: 'line',
                            shape: makeShape(
                     