function color_path(d, ctx) {
        ctx.beginPath();
        if ((__.bundleDimension !== null && __.bundlingStrength > 0) || __.smoothness > 0) {
            single_curve(d, ctx);
        } else {
            single_path(d, ctx);
        }
        ctx.stroke();
    }
function color_path(d, ctx) {
        ctx.beginPath();
        if ((__.bundleDimension !== null && __.bundlingStrength > 0) || __.smoothness > 0) {
            single_curve(d, ctx);
        } else {
            single_path(d, ctx);
        }
        ctx.stroke();
    }
function color_path ( d , ctx ) { ctx . beginPath ( ) ; if ( ( __ . bundleDimension !== null && __ . bundlingStrength > 0 ) || __ . smoothness > 0 ) { single_curve ( d , ctx ) ; } else { single_path ( d , ctx ) ; } ctx . stroke ( ) ; }
draw single polyline
draw single polyline