Merge b919905449 into 53af9121e7

doc fix & screws fix

beziers.scad

@@ -466,12 +466,15 @@ function bezpath_curve(bezpath, splinesteps=16, N=3, endpoint=true) =
     assert(len(bezpath)%N == 1, str("A degree ",N," bezier path should have a multiple of ",N," points in it, plus 1."))
     let(
         segs = (len(bezpath)-1) / N,
-        step = 1 / splinesteps
+        step = 1 / splinesteps,
-    ) [
+        path = [
-        for (seg = [0:1:segs-1])
+            for (seg = [0:1:segs-1])
-            each bezier_points(select(bezpath, seg*N, (seg+1)*N), [0:step:1-step/2]),
+                each bezier_points(select(bezpath, seg*N, (seg+1)*N), [0:step:1-step/2]),
-        if (endpoint) last(bezpath)
+            if (endpoint) last(bezpath)
-    ];
+        ],
+        is_closed = approx(path[0], last(path)),
+        out = path_merge_collinear(path, closed=is_closed)
+    ) out;
 
 
 // Function: bezpath_closest_point()

shapes3d.scad

@@ -858,7 +858,7 @@ function octahedron(size=1, anchor=CENTER, spin=0, orient=UP) =
 //   Creates a prism whose ends are similar `n`-sided regular polygons, with optional rounding, chamfers or textures.
 //   You can specify the size of the ends using diameter or radius measured either inside or outside.  Alternatively
 //   you can give the length of the side of the polygon.  You can specify chamfers and roundings for the ends, but not
-//   the vertical edges.  See {{rounded_prism}} for prisms with rounded vertical edges.  You can also specify texture for the side
+//   the vertical edges.  See {{rounded_prism()}} for prisms with rounded vertical edges.  You can also specify texture for the side
 //   faces, but note that texture is not compatible with any roundings or chamfers.  
 //   .
 //   Anchors are based on the VNF of the prism.  Especially for tapered or shifted prisms, this may give unexpected anchor positions, such as top side anchors