union all

src/polyline2d.scad

@@ -80,9 +80,11 @@ module polyline2d(points, width = 1, startingStyle = "CAP_SQUARE", endingStyle =
         line2d(points[0], points[1], width, startingStyle, endingStyle);
     }
     else {
+        union() {
             for(i = [1:leng_pts - 1]) {
                 line_segment(i);
             }
             joins(points, width / 2, leng_pts - 2, 0);
         }
+    }
 }