use polyline_join

examples/fidget_ball_fern_leaf.scad

@@ -1,4 +1,4 @@
-use <hull_polyline3d.scad>;
+use <polyline_join.scad>;
 use <hollow_out.scad>;
 use <util/dedup.scad>;
 use <turtle/lsystem2.scad>;
@@ -43,11 +43,8 @@ module fidget_ball_fern_leaf(radius, thickness, spacing, drill_angle, support_th
 			for(i = [0:n - 1]) {
 				rotate(i * a_step)
 				for(line = fern) {
-					hull_polyline3d(
-						line,
-						thickness * thickness_scale,
-						$fn = 5
-					);
+				    polyline_join(line)
+					    sphere(thickness * thickness_scale / 2, $fn = 5);
 				}
 			}
 		}

examples/hollow_out/hollow_out_cylinder.scad

@@ -1,5 +1,5 @@
-use <hull_polyline3d.scad>;
-use <experimental/tri_delaunay.scad>;
+use <polyline_join.scad>;
+use <triangle/tri_delaunay.scad>;
 use <experimental/tri_bisectors.scad>;
 use <ptf/ptf_bend.scad>;
 
@@ -33,9 +33,6 @@ bisectors = [
 
 for(line = bisectors) {
     pts = [for(p = line) ptf_bend(size, p, radius, 360)];
-    hull_polyline3d(
-        concat(pts, [pts[0]]), 
-        line_diameter = line_diameter,
-        $fn = 4
-    );
+    polyline_join(concat(pts, [pts[0]]))
+        sphere(d = line_diameter, $fn = 4);
 }

examples/hollow_out/hollow_out_holder.scad

@@ -1,4 +1,4 @@
-use <hull_polyline3d.scad>;
+use <polyline_join.scad>;
 use <ptf/ptf_bend.scad>;
 use <hollow_out_square.scad>;
 
@@ -18,7 +18,8 @@ lines = concat(
 
 for(line = lines) {  
    transformed = [for(pt = line) ptf_bend([columns * width, rows * width], pt, radius, angle)];
-   hull_polyline3d(transformed, diameter, $fn = 4);
+   polyline_join(transformed)
+       sphere(d = diameter, $fn = 4);
 }
 
 translate([0, 0, -diameter / 2])

examples/hollow_out/hollow_out_starburst.scad

@@ -1,5 +1,5 @@
 use <shape_starburst.scad>;
-use <hull_polyline3d.scad>;
+use <polyline_join.scad>;
 use <experimental/tri_bisectors.scad>;
 
 r1 = 30;
@@ -19,9 +19,11 @@ module hollow_out_starburst(r1, r2, h, n, line_diameter, half = false) {
     
     module half_star() {
         for(tri = tris) {
-            hull_polyline3d(concat(tri, [tri[0]]), line_diameter = line_diameter);
+            polyline_join(concat(tri, [tri[0]]))
+			    sphere(d = line_diameter);
             for(line = tri_bisectors(tri)) {
-                hull_polyline3d(concat(line, [line[0]]), line_diameter = line_diameter);
+                polyline_join(concat(line, [line[0]]))
+				    sphere(d = line_diameter);
             }
         }    
     }

examples/hollow_out/hollow_out_torus.scad

@@ -1,4 +1,4 @@
-use <hull_polyline3d.scad>;
+use <polyline_join.scad>;
 use <ptf/ptf_torus.scad>;
 use <hollow_out_square.scad>;
 
@@ -13,7 +13,8 @@ lines = hollow_out_square([columns, rows], width);
 
 for(line = lines) {  
    transformed = [for(pt = line) ptf_torus([columns * width, rows * width], pt, [radius, radius / 2], twist = twist)];
-   hull_polyline3d(transformed, line_diameter, $fn = 4);
+   polyline_join(transformed)
+       sphere(d = line_diameter, $fn = 4);
 }
 
 color("black")

examples/hollow_out/hollow_out_vase.scad

@@ -1,4 +1,4 @@
-use <hull_polyline3d.scad>;
+use <polyline_join.scad>;
 use <bezier_curve.scad>;
 use <ptf/ptf_rotate.scad>;
 use <rails2sections.scad>;
@@ -19,6 +19,7 @@ p4 = [35, 0, 130];
 hollow_out_vase([p0, p1, p2, p3, p4], t_step, line_diameter, fn, line_style);
 
 module hollow_out_vase(ctrl_pts, t_step, line_diameter, fn, line_style) {
+    line_r = line_diameter / 2;
     bezier = bezier_curve(t_step, 
         ctrl_pts
     );
@@ -45,9 +46,11 @@ module hollow_out_vase(ctrl_pts, t_step, line_diameter, fn, line_style) {
     for(tri = fst_tris) {
         lines = tri_bisectors(tri);
         for(line = lines) {
-            hull_polyline3d(line, diameter = line_diameter, $fn = 4);
+            polyline_join(line)
+			    sphere(line_r, $fn = 4);
         }
-        hull_polyline3d([lines[2][1], [0, 0, 0]], diameter = line_diameter, $fn = 4);
+		polyline_join([lines[2][1], [0, 0, 0]])
+			sphere(line_r, $fn = 4);
     }
 
     // mouth
@@ -59,7 +62,10 @@ module hollow_out_vase(ctrl_pts, t_step, line_diameter, fn, line_style) {
     dangling_pts = [for(tri = lst_tris) tri_bisectors(tri)[1][1]];
     offset_z = [0, 0, line_diameter];
     for(i = [0: leng_sect - 1]) {
-       hull_polyline3d([lst_sect[i] + offset_z, dangling_pts[i]], diameter = line_diameter, $fn = 4);
-       hull_polyline3d([lst_sect[(i + 1) % leng_sect] + offset_z, dangling_pts[i]], diameter = line_diameter, $fn = 4);   
+	    polyline_join([lst_sect[i] + offset_z, dangling_pts[i]])
+			sphere(line_r, $fn = 4);
+		
+		polyline_join([lst_sect[(i + 1) % leng_sect] + offset_z, dangling_pts[i]])
+			sphere(line_r, $fn = 4);
     }
 }

examples/image_slicer.scad

@@ -1,4 +1,3 @@
-use <hull_polyline2d.scad>;
 use <contours.scad>;
 
 level_step = 51;

examples/klein_bottle.scad

@@ -2,7 +2,7 @@ use <arc_path.scad>;
 use <shape_circle.scad>;
 use <path_extrude.scad>;
 use <bezier_curve.scad>;
-use <hull_polyline2d.scad>;
+use <polyline_join.scad>;
 use <bspline_curve.scad>;
 
 radius1 = 10;
@@ -31,10 +31,8 @@ module klein_bottle(radius1, radius2, bottom_height, thickness, t_step, fn) {
                 
             path = concat([for(p = ph1) p + [radius1 + radius2, 0, 0]], ph2);
                 
-            hull_polyline2d(
-                path, 
-                thickness
-            );      
+		    polyline_join(path)
+			    circle(half_thickness);
         }
     }
 

examples/maze/mobius_maze.scad

@@ -1,4 +1,4 @@
-use <hull_polyline3d.scad>;
+use <polyline_join.scad>;
 use <maze/mz_square_cells.scad>;
 use <maze/mz_square_walls.scad>;
 use <ptf/ptf_ring.scad>;
@@ -24,5 +24,6 @@ walls = mz_square_walls(cells, rows, columns, cell_width, bottom_border = false)
 size = [columns * cell_width, rows * cell_width];
 for(wall_pts = walls) {  
    transformed = [for(pt = wall_pts) ptf_ring(size, pt, radius, 360, angle)];
-   hull_polyline3d(transformed, line_diameter);
+   polyline_join(transformed)
+       sphere(d = line_diameter);
 }

examples/maze/noisy_circle_maze.scad

@@ -1,4 +1,4 @@
-use <hull_polyline2d.scad>;
+use <polyline_join.scad>;
 use <util/rand.scad>;
 use <maze/mz_square_cells.scad>;
 use <maze/mz_square_walls.scad>;
@@ -18,7 +18,7 @@ module noisy_circle_maze(r_cells, cell_width, wall_thickness, origin_offset, noi
     rect_size = is_undef(origin_offset) ? [width, width] : [width, width] - origin_offset * 2;
 
     noisy_f = is_undef(noisy_factor) ? 1 : noisy_factor;
-    
+    half_wall_thickness = wall_thickness / 2;
     seed = rand(0, 256);
     for(wall = walls) {
         for(i = [0:len(wall) - 2]) {
@@ -28,7 +28,8 @@ module noisy_circle_maze(r_cells, cell_width, wall_thickness, origin_offset, noi
             pn01 = nz_perlin2(p0[0] + seed, p0[1] + seed, seed) * noisy_f;
             pn10 = nz_perlin2(p1[0], p1[1], seed) * noisy_f;
             pn11 = nz_perlin2(p1[0] + seed, p1[1] + seed, seed) * noisy_f;
-            hull_polyline2d([p0 + [pn00, pn01], p1 + [pn10, pn11]], width = wall_thickness);
+			polyline_join([p0 + [pn00, pn01], p1 + [pn10, pn11]])
+			    circle(half_wall_thickness);
         }
     } 
 }

examples/maze/spiral_maze.scad

@@ -1,6 +1,5 @@
 use <archimedean_spiral.scad>;
-use <hull_polyline3d.scad>;
-use <hull_polyline2d.scad>;
+use <polyline_join.scad>;
 
 use <maze/mz_square_cells.scad>;
 use <maze/mz_square_walls.scad>;
@@ -29,8 +28,10 @@ module spiral_maze() {
                 rows, columns, cell_width
             );
 
+    half_thickness = wall_thickness / 2;
+    
     for(wall = walls) {
-        hull_polyline3d([
+	    polyline_join([
             for(p = wall) 
                 let(
                     x = p[0],
@@ -38,14 +39,12 @@ module spiral_maze() {
                     cp = (pts3d[x] + pts3d[x + 1]) / 2
                 )
                 cp + [0, y, 0]
-            ],
-            wall_thickness, 
-            $fn = 5
-        );
+        ]) sphere(half_thickness, $fn = 5);
     }
 
     translate([0, rows, 0])
     rotate([90, 0, 0])
     linear_extrude(rows)
-        hull_polyline2d([for(i = [1:len(pts2d) - 2]) pts2d[i]], wall_thickness / 2);
+	polyline_join([for(i = [1:len(pts2d) - 2]) pts2d[i]])
+	    circle(wall_thickness / 4);
 }

examples/maze/theta_maze.scad

@@ -1,6 +1,6 @@
 use <maze/mz_theta_cells.scad>;
 use <maze/mz_theta_get.scad>;
-use <hull_polyline2d.scad>;
+use <polyline_join.scad>;
 
 rows = 5;
 beginning_number = 8;
@@ -16,6 +16,7 @@ module theta_maze(rows, beginning_number, cell_width, wall_thickness, wall_heigh
 
 	maze = mz_theta_cells(rows, beginning_number);
 
+    half_wall_thickness = wall_thickness / 2;
 	linear_extrude(wall_height) {
 		for(rows = maze) {
 			for(cell = rows) {
@@ -33,11 +34,13 @@ module theta_maze(rows, beginning_number, cell_width, wall_thickness, wall_heigh
 				outerVt2 = vt_from_angle(theta2, outerR);
 				
 				if(wallType == "INWARD_WALL" || wallType == "INWARD_CCW_WALL") {
-					hull_polyline2d([innerVt1, innerVt2], width = wall_thickness);
+				    polyline_join([innerVt1, innerVt2])
+					    circle(half_wall_thickness);
 				}
 
 				if(wallType == "CCW_WALL" || wallType == "INWARD_CCW_WALL") {
-					hull_polyline2d([innerVt2, outerVt2], width = wall_thickness);
+					polyline_join([innerVt2, outerVt2])
+					    circle(half_wall_thickness);
 				}
 			} 
 		}
@@ -47,7 +50,8 @@ module theta_maze(rows, beginning_number, cell_width, wall_thickness, wall_heigh
 		for(theta = [0:thetaStep:360 - thetaStep]) {
 			vt1 = vt_from_angle(theta, r);
 			vt2 = vt_from_angle(theta + thetaStep, r);
-			hull_polyline2d([vt1, vt2], width = wall_thickness);
+			polyline_join([vt1, vt2])
+			    circle(half_wall_thickness);
 		} 
 	}
 }

examples/maze/torus_knot_maze.scad

@@ -1,4 +1,4 @@
-use <hull_polyline3d.scad>;
+use <polyline_join.scad>;
 use <maze/mz_square_cells.scad>;
 use <maze/mz_square_walls.scad>;
 use <path_extrude.scad>;
@@ -42,25 +42,22 @@ module torus_knot_maze() {
             );
 
     half_row = rows / 2;
-	
+	r = wall_thickness / 2;
     for(wall = walls) {
-        hull_polyline3d([
-            for(p = wall) 
-                let(
-                    x = p[0],
-                    y = p[1]
-                )
-                path[x] + ptf_rotate(
-				    ptf_rotate(
-					    [-y + half_row, 0, 0], 
-						[0, 0, -90]
-					), 
-					[0, angle_yz[x][0], angle_yz[x][1]]
-			    )
-            ],
-            wall_thickness, 
-            $fn = 4
-        );
+	    polyline_join([
+		for(p = wall) 
+			let(
+				x = p[0],
+				y = p[1]
+			)
+			path[x] + ptf_rotate(
+				ptf_rotate(
+					[-y + half_row, 0, 0], 
+					[0, 0, -90]
+				), 
+				[0, angle_yz[x][0], angle_yz[x][1]]
+			)
+		]) sphere(r, $fn = 4);
     }
 
     if(filled) {

examples/maze/torus_maze.scad

@@ -1,4 +1,4 @@
-use <hull_polyline3d.scad>;
+use <polyline_join.scad>;
 use <ptf/ptf_torus.scad>;
 use <maze/mz_square_cells.scad>;
 use <maze/mz_square_walls.scad>;
@@ -24,7 +24,8 @@ walls = mz_square_walls(cells, rows, columns, cell_width, left_border = false, b
 size = [columns * cell_width, rows * cell_width];
 for(wall_pts = walls) {  
    transformed = [for(pt = wall_pts) ptf_torus(size, pt, [radius, radius / 2], twist = twist)];
-   hull_polyline3d(transformed, line_diameter, $fn = 4);
+   polyline_join(transformed)
+       sphere(d = line_diameter, $fn = 4);
 }
 
 color("black")

examples/maze/twisted_maze.scad

@@ -1,4 +1,4 @@
-use <hull_polyline3d.scad>;
+use <polyline_join.scad>;
 use <maze/mz_square_cells.scad>;
 use <maze/mz_square_walls.scad>;
 use <ptf/ptf_x_twist.scad>;
@@ -21,5 +21,6 @@ walls = mz_square_walls(cells, rows, columns, cell_width);
 size = [columns * cell_width, rows * cell_width];
 for(wall_pts = walls) {  
    transformed = [for(pt = wall_pts) axis == "X_AXIS" ? ptf_x_twist(size, pt, angle) : ptf_y_twist(size, pt, angle)];
-   hull_polyline3d(transformed, line_diameter);
+   polyline_join(transformed)
+       sphere(d = line_diameter);
 }

examples/samurai_daruma.scad

@@ -1,6 +1,6 @@
 use <daruma.scad>;
 use <arc.scad>;
-use <hull_polyline2d.scad>;
+use <polyline_join.scad>;
 
 text = "順暢";
 font = "思源黑體 Medium";
@@ -48,7 +48,8 @@ module helmet() {
 		
 		rotate(-30)
 		rotate_extrude(angle = 240, $fn = 12)
-			hull_polyline2d([[40.65, 1], [45, -10], [50, -30], [60, -45]], 3.25, $fn = 4);
+		polyline_join([[40.65, 1], [45, -10], [50, -30], [60, -45]])
+		    circle(1.625, $fn = 4);
 
 		translate([0, 0, 1])	
 		linear_extrude(2)	

examples/shape2wire.scad

@@ -1,6 +1,5 @@
 use <ptf/ptf_rotate.scad>;
-use <hull_polyline2d.scad>;
-use <hull_polyline3d.scad>;
+use <polyline_join.scad>;
 use <shape_superformula.scad>; 
 
 function shape2wire(shape, r) = 
@@ -28,9 +27,11 @@ rotate([90, 0, 0])
 linear_extrude(1, center = true)
 difference() {
 	square(120, center = true);
-	hull_polyline2d(concat(shape, [shape[0]]), width = 5);
+	polyline_join(concat(shape, [shape[0]]))
+	    circle(2.5);
 }
 
 wire = shape2wire(shape, 150);
 rotate(-$t * 360)
-    hull_polyline3d(concat(wire, [wire[0]]), 3);
+polyline_join(concat(wire, [wire[0]]))
+	sphere(1.5);

examples/sierpinski_pyramid.scad

@@ -1,4 +1,4 @@
-use <hull_polyline3d.scad>;
+use <polyline_join.scad>;
 
 side_leng = 100;
 min_leng = 5;
@@ -29,11 +29,15 @@ module pyramid_frame(side_leng, diameter) {
     tri_pts = [[0, 0, h], [half_leng, half_leng, 0], [half_leng, -half_leng, 0], [0, 0, h]];
     line_pts = [[half_leng, half_leng, 0], [-half_leng, half_leng, 0]];
     
-    hull_polyline3d(tri_pts, diameter);
+    polyline_join(tri_pts) 
+	    sphere(d = diameter);
     mirror([1, 0, 0]) 
-        hull_polyline3d(tri_pts, diameter);
+	polyline_join(tri_pts) 
+	    sphere(d = diameter);
     
-    hull_polyline3d(line_pts, diameter);
+	polyline_join(line_pts) 
+	    sphere(d = diameter);
     mirror([0, 1, 0]) 
-        hull_polyline3d(line_pts, diameter);
+	polyline_join(line_pts) 
+	    sphere(d = diameter);
 }

examples/spiral/nautilus_shell.scad

@@ -1,5 +1,5 @@
 use <ptf/ptf_rotate.scad>;
-use <hull_polyline2d.scad>;
+use <polyline_join.scad>;
 use <bezier_curve.scad>;
 use <ellipse_extrude.scad>;
 
@@ -19,8 +19,10 @@ module nautilus_shell(chambered_section_max_angle, steps, thickness) {
             ptf_rotate([r(a), 0], a)
     ];
 
+    half_thickness = thickness / 2;
     render() {
-        hull_polyline2d(spiral, thickness);
+	    polyline_join(spiral)
+		    circle(half_thickness);
 
         for(a = [a_step:a_step * 2:chambered_section_max_angle]) {
             a2 = a + 360;
@@ -29,9 +31,8 @@ module nautilus_shell(chambered_section_max_angle, steps, thickness) {
             p2 = ptf_rotate((p1 + ptf_rotate([r(a2), 0], a2)) * .6, -5);
             p3 = ptf_rotate([r(a3), 0], a3);
             
-            hull_polyline2d(bezier_curve(0.1, 
-                [p1, p2, p3]
-            ), thickness);
+			polyline_join(bezier_curve(0.1, [p1, p2, p3]))
+			    circle(half_thickness);
         }
 
     }

examples/spiral/spiral_math_constants.scad

@@ -1,5 +1,5 @@
 use <fibonacci_lattice.scad>;
-use <hull_polyline3d.scad>;
+use <polyline_join.scad>;
 use <polyhedron_hull.scad>;
 
 n = 150;
@@ -51,6 +51,7 @@ module spiral_math_constants(n, radius, constants, font_name, font_size, txt_ext
 	}
 
 	for(i = [0:2:6]) {
-		hull_polyline3d(spirals[i] * 0.9, 1, $fn = 4); 
+		polyline_join(spirals[i] * 0.9)
+		    sphere(.5, $fn = 4); 
 	}
 }

examples/spiral/string_tetrahedron.scad

@@ -1,4 +1,4 @@
-use <hull_polyline3d.scad>;
+use <polyline_join.scad>;
 
 leng = 50;
 diameter = 5;
@@ -20,8 +20,10 @@ module string_tetrahedron(leng, diameter, segs_per_side, line_fn) {
         pts1 = pts(side1[0], side1[1], segs);
         pts2 = pts(side2[0], side2[1], segs);
         
+		r = diameter / 2;
         for(i = [0:len(pts1) - 1]) {
-            hull_polyline3d(points = [pts1[i], pts2[i]], diameter = diameter);
+		    polyline_join([pts1[i], pts2[i]])
+			    sphere(r);
         }
     }
 

examples/spiral/string_tetrahedrons.scad

@@ -1,4 +1,4 @@
-use <hull_polyline3d.scad>;
+use <polyline_join.scad>;
 
 level = 1;
 leng = 50;
@@ -20,12 +20,16 @@ module string_tetrahedron(leng, diameter, segs_per_side, line_fn) {
         pts2 = pts(side2[0], side2[1], segs);
         
         leng = len(pts1);
-        hull_polyline3d(points = [pts1[0], pts2[0]], diameter = diameter);
+		r = diameter / 2;
+        polyline_join(points = [pts1[0], pts2[0]])
+		    sphere(r);
         for(i = [1:leng - 2]) {
-            hull_polyline3d(points = [pts1[i], pts2[i]], diameter = diameter);
+            polyline_join([pts1[i], pts2[i]])
+			    sphere(r);
         }
         end = leng - 1;
-        hull_polyline3d(points = [pts1[end], pts2[end]], diameter = diameter);
+		polyline_join([pts1[end], pts2[end]])
+		    sphere(r);
     }
 
     function height(leng) = 

examples/spiral/vx_spiral_text.scad

@@ -1,4 +1,4 @@
-use <hull_polyline2d.scad>;
+use <polyline_join.scad>;
 use <voxel/vx_ascii.scad>;
 
 tx = "3.14159265358979323846264338327950288419716939937510582097494459230781640628620899862803482534211706798214808651328230664709384460955058223172";
@@ -20,7 +20,8 @@ linear_extrude(1) {
         translate(pts[i]) 
             square(7, center = true);
     }
-    hull_polyline2d([for(i = [0:len(tx) - 1]) pts[i]], width = 2);
+	polyline_join([for(i = [0:len(tx) - 1]) pts[i]])
+	    circle(1);
 }
 
 function _px_spiral_forward(pt, leng, dir, clockwise) = 

examples/spiral_polygons/spiral_polygons.scad

@@ -1,5 +1,5 @@
 use <shape_circle.scad>;
-use <hull_polyline2d.scad>;
+use <polyline_join.scad>;
 use <util/sum.scad>;
 
 beginning_radius = 10;
@@ -18,11 +18,14 @@ module spiral_polygons(beginning_radius, line_width, fn, n) {
 	dr = y / cos(theta);
 	pw = pow((beginning_radius + dr) * sin(theta), 2);
 	
+	half_line_width = line_width / 2;
+	
 	function a(ri, ro, i) = acos((pow(ro, 2) + pow(ri, 2) - pw * pow(0.985, i)) / (2 * ro * ri));
 	
 	module drawPolygon(r) {
 	    pts = shape_circle(radius = r, $fn = fn);
-	    hull_polyline2d(concat(pts, [pts[0]]), width = line_width, $fn = 12);
+		polyline_join(concat(pts, [pts[0]]))
+		    circle(half_line_width, $fn = 12);
 	}
 	
 	rs = [for(i = [0: n - 1]) beginning_radius + i * dr];

examples/spiral_polygons/square_pursuit_3d.scad

@@ -1,4 +1,4 @@
-use <hull_polyline3d.scad>;
+use <polyline_join.scad>;
 
 length = 100;
 diff_scale = 0.125;
@@ -22,7 +22,8 @@ module square_pursuit_3d(length, diff_scale, diameter, n) {
             
             npts = [for(i = [0:3]) inter_p(pts[i], pts[(i + 1) % 4], leng, d)];
             
-            hull_polyline3d(concat(npts, [npts[3], npts[0]]), diameter);
+            polyline_join(concat(npts, [npts[3], npts[0]]))
+			    sphere(d = diameter);
             
             _square_pursuit_3d(npts, diff_scale, diameter, n - 1);
         }
@@ -36,7 +37,8 @@ module square_pursuit_3d(length, diff_scale, diameter, n) {
         [0, length, 0]
     ];    
     
-    hull_polyline3d(concat(pts, [pts[3], pts[0]]), diameter);
+    polyline_join(concat(pts, [pts[3], pts[0]]))
+	    sphere(d = diameter);
     
     _square_pursuit_3d(pts, diff_scale, diameter, n - 1);
 }

examples/taiwan/voronoi_taiwan.scad

@@ -1,5 +1,4 @@
 use <triangle/tri_delaunay.scad>;
-use <hull_polyline2d.scad>;
 use <shape_taiwan.scad>;
 use <in_shape.scad>;
 

examples/tiles/lavender.scad

@@ -1,5 +1,4 @@
 use <pie.scad>;
-use <hull_polyline2d.scad>;
 use <ptf/ptf_rotate.scad>;
 use <experimental/tile_penrose3.scad>;
 

examples/tiles/penrose_basket.scad

@@ -1,7 +1,7 @@
 use <experimental/tile_penrose3.scad>;
 use <experimental/ptf_c2sphere.scad>;
 use <ptf/ptf_rotate.scad>;
-use <hull_polyline3d.scad>;
+use <polyline_join.scad>;
 use <surface/sf_thickenT.scad>;
 use <polyhedron_hull.scad>;
 use <util/every.scad>;
@@ -19,6 +19,7 @@ $fn = 4;
 penrose_basket(basket_radius, radius_in_plane, n, line_diameter, bottom_radius, bottom_height, shell_random_threshold);
 
 module penrose_basket(basket_radius, radius_in_plane, n, line_diameter, bottom_radius, bottom_height, shell_random_threshold) {
+    line_r = line_diameter / 2;
 	tris = [for(t = tile_penrose3(n)) t[1] * radius_in_plane];
 	for(t = tris) {
 		if(every(t, function(p) norm(p) < radius_in_plane * 1.25)) {
@@ -30,10 +31,8 @@ module penrose_basket(basket_radius, radius_in_plane, n, line_diameter, bottom_r
 					cp
 			];
 			
-			hull_polyline3d(
-				pts, 
-				line_diameter
-			);
+			polyline_join(pts)
+			    sphere(line_r);
 
 			if(rands(0, 1, 1)[0] < shell_random_threshold) {
 				inward_ratio = (basket_radius - 0.25 * line_diameter) / basket_radius;

examples/tiles/tiled_line_mobius.scad

@@ -1,5 +1,5 @@
 use <experimental/tile_truchet.scad>;
-use <hull_polyline3d.scad>;
+use <polyline_join.scad>;
 use <ptf/ptf_ring.scad>;
 
 size = [20, 100];
@@ -28,9 +28,10 @@ module tiled_line_mobius(size, twist, line_diameter = 1) {
         ]
     );
             
+    half_line_diameter = line_diameter / 2;
     for(line = lines) {
         pts = [for(p = line) ptf_ring(size, p, size[0], twist = twist)];
-        hull_polyline3d(pts, diameter = line_diameter);
+        polyline_join(pts) sphere(half_line_diameter);
     }
 }
 

examples/tiles/tiled_line_torus.scad

@@ -1,5 +1,5 @@
 use <experimental/tile_truchet.scad>;
-use <hull_polyline3d.scad>;
+use <polyline_join.scad>;
 use <ptf/ptf_torus.scad>;
 
 size = [20, 50];
@@ -18,9 +18,11 @@ module tiled_line_torus(size, twist, line_diameter = 1) {
             i <= 1 ? [[x, y], [x + 1, y + 1]] : [[x + 1, y], [x, y + 1]]  
         ];
             
+	half_line_diameter = line_diameter / 2;
     for(line = lines) {
         pts = [for(p = line) ptf_torus(size, p, [size[0], size[0] / 2], twist = twist)];
-        hull_polyline3d(pts, diameter = line_diameter);
+        polyline_join(pts)
+		    sphere(half_line_diameter);
     }
 }
 

examples/trefoil_klein_bottle.scad

@@ -3,7 +3,7 @@ use <shape_circle.scad>;
 use <path_extrude.scad>;
 use <bezier_curve.scad>;
 use <bspline_curve.scad>;
-use <hull_polyline2d.scad>;
+use <polyline_join.scad>;
 
 thickness = 4.5;
 t_step = 0.05;
@@ -28,10 +28,8 @@ module dis_connected_klein_bottle(radius1, radius2, bottom_height, thickness, t_
                 
             path = concat([for(p = ph1) p + [radius1 + radius2, 0, 0]], ph2);
                 
-            hull_polyline2d(
-                path, 
-                thickness
-            );      
+            polyline_join(path)
+			    circle(half_thickness);      
         }
     }
 

examples/turtle/fern_leaf_stencil.scad

@@ -1,4 +1,4 @@
-use <hull_polyline2d.scad>;
+use <polyline_join.scad>;
 use <hollow_out.scad>;
 use <turtle/t2d.scad>;
 
@@ -13,7 +13,8 @@ k2 = 0.3;
 
 module fern_leaf(t, leng, min_leng, k1, k2, width) {
     t1 = t2d(t, "forward", leng = leng);
-    hull_polyline2d([t2d(t, "point"), t2d(t1, "point")], width);
+    polyline_join([t2d(t, "point"), t2d(t1, "point")])
+	    circle(width / 2);
     
     if(leng > min_leng) {
         fern_leaf(
@@ -22,7 +23,8 @@ module fern_leaf(t, leng, min_leng, k1, k2, width) {
         );
         
         t2 = t2d(t1, "forward", leng = k1 * leng);
-        hull_polyline2d([t2d(t1, "point"), t2d(t2, "point")], width);
+        polyline_join([t2d(t1, "point"), t2d(t2, "point")])
+		    circle(width / 2);
         
         t3 = t2d(t2, "turn", angle = -69.0);
         fern_leaf(

examples/turtle/hilbert_curve_drawing.scad

@@ -1,5 +1,5 @@
 use <bezier_smooth.scad>;
-use <hull_polyline3d.scad>;
+use <polyline_join.scad>;
 use <util/dedup.scad>;
 use <turtle/lsystem3.scad>;
 
@@ -14,7 +14,8 @@ hilbert_path = dedup(
     );
 smoothed_hilbert_path = bezier_smooth(hilbert_path, corner_r);
 
-hull_polyline3d(smoothed_hilbert_path,  diameter = diameter);
+polyline_join(smoothed_hilbert_path)
+    sphere(d = diameter);
 
 function hilbert_curve() = 
     let(

examples/turtle/lsystem3_collection.scad

@@ -1,13 +1,10 @@
 use <turtle/lsystem3.scad>;
 use <util/dedup.scad>;
-use <hull_polyline3d.scad>;
+use <polyline_join.scad>;
 
 for(line = dedup(hilbert_curve())) {
-    hull_polyline3d(
-        [line[0], line[1]], 
-        diameter = 0.5, 
-        $fn = 4
-    );
+    polyline_join([line[0], line[1]])
+	    sphere(.25, $fn = 4);
 }  
 
 function tree1(n = 4, angle = 22.5, leng = 1, heading = 0, start = [0, 0, 0]) = 

examples/turtle/sierpinski_triangle.scad

@@ -1,4 +1,4 @@
-use <hull_polyline2d.scad>;
+use <polyline_join.scad>;
 use <turtle/t2d.scad>;
 
 side_leng = 100;
@@ -17,10 +17,8 @@ module triangle(t, side_leng, thickness) {
         ["forward", side_leng]
     ]);
 
-    hull_polyline2d(
-        [for(turtle = [t, t2, t3, t]) t2d(turtle, "point")], 
-        thickness
-    );
+    polyline_join([for(turtle = [t, t2, t3, t]) t2d(turtle, "point")])
+	    circle(thickness / 2);
 }
 
 module sierpinski_triangle(t, side_leng, min_leng, thickness) {

examples/voronoi/voronoi_torus.scad

@@ -1,5 +1,5 @@
 use <voronoi/vrn2_cells_space.scad>;
-use <hull_polyline3d.scad>;
+use <polyline_join.scad>;
 use <ptf/ptf_torus.scad>;
 
 size = [40, 80];
@@ -11,5 +11,6 @@ $fn = 4;
 for(cell = cells) {
     cell_poly = [for(p = cell[1]) ptf_torus(size, p, [10, 5], [360, 360])];
 
-    hull_polyline3d(cell_poly, diameter = 1);
+    polyline_join(cell_poly)
+	    sphere(d = 1);
 }