e(curve, enable, jump) {
        if (curve) {
            if (enable) {
                var color = jump ? jumpHighlightColor : highlightColor;
                curve.attr('stroke-width', 4);
                curve.attr('stroke', color);
                curve.attr('stroke-opacity', 1.0);
                curve.toFront();
            } else {
                if (curve.edge) {
                    curve.attr('stroke-width', 3);
                    curve.attr('stroke', curve.edge.src.tile.quantumColor);
          