add plot_revolution

math.scad

@@ -142,7 +142,7 @@ function lerpn(a,b,n,endpoint=true) =
 // Function: bilerp()
 // Synopsis: Bi-linear interpolation between four values
 // Topics: Interpolation, Math
-// See Also: lerpn()
+// See Also: lerp()
 // Usage:
 //   x = bilerp(pts, x, y);
 // Description:

rounding.scad

@@ -2579,7 +2579,9 @@ function _circle_mask(r) =
 //   same dimensions that is has on the plane, with y axis mapping to the z axis and the x axis bending
 //   around the curve of the cylinder.  The angular span of the path on the cylinder must be somewhat
 //   less than 180 degrees, and the path shouldn't have closely spaced points at concave points of high curvature because
-//   this causes self-intersection in the mask polyhedron, resulting in CGAL failures.
+//   this causes self-intersection in the mask polyhedron, resulting in CGAL failures.  The path also cannot include
+//   sharp corners, because it internally uses {{offset()}} which will expand those sharp corners into very long single
+//   segments that produce incorrect result.  
 // Arguments:
 //   r / radius = center radius of the cylindrical shell to cut a hole in
 //   thickness = thickness of cylindrical shell (may need to be slighly oversized)
@@ -4535,6 +4537,10 @@ function _find_center_anchor(desc1, desc2, anchor2, flip) =
 
 
 
+function _is_anchor(a) = is_string(a) || is_vector(a,2) || is_vector(a,3);
+
+function _is_anchor_list(list) = is_list(list) && [for(a=list) if (!_is_anchor(a)) a]==[];
+
 
 module prism_connector(profile, desc1, anchor1, desc2, anchor2, shift1=0, shift2=0, spin_align=1,
                        scale=1,
@@ -4545,6 +4551,25 @@ module prism_connector(profile, desc1, anchor1, desc2, anchor2, shift1=0, shift2
                        smooth_normals, smooth_normals1, smooth_normals2, 
                        debug=false, debug_pos=false)
 {
+    dummy1 = assert(_is_anchor(anchor1) || _is_anchor_list(anchor1) , "anchor1 must be an anchor (string or a 3-vector) or a list of anchors")
+             assert(_is_anchor(anchor2) || _is_anchor_list(anchor2) , "anchor2 must be an anchor (string or a 3-vector) or a list of anchors");
+    if (_is_anchor_list(anchor1) || _is_anchor_list(anchor2)) {
+      anchor1_list=_is_anchor(anchor1) ? [anchor1] : anchor1;
+      anchor2_list=_is_anchor(anchor2) ? [anchor2] : anchor2;
+      for(i = idx(anchor1_list))
+        for(j= idx(anchor2_list))
+          {
+            $anchor1 = anchor1_list[i];
+            $anchor2 = anchor2_list[j];
+            $idx = [i,j];
+            prism_connector(profile=profile, desc1=desc1, anchor1=$anchor1, desc2=desc2, anchor2=$anchor2, shift1=shift1, shift2=shift2, spin_align=spin_align,
+                            scale=scale, fillet=fillet, fillet1=fillet1, fillet2=fillet2, overlap=overlap, overlap1=overlap1, overlap2=overlap2,
+                            k=k, k1=k1, k2=k2, n=n, n1=n1, n2=n2, uniform=uniform, uniform1=uniform1, uniform2=uniform2,
+                            smooth_normals=smooth_normals, smooth_normals1=smooth_normals1, smooth_normals2=smooth_normals2,
+                            debug=debug, debug_pos=debug_pos) children();
+          }
+    }
+    else {
       base_fillet = first_defined([fillet1,fillet,0]);
       aux_fillet = first_defined([fillet2,fillet,0]);
 
@@ -4581,8 +4606,7 @@ module prism_connector(profile, desc1, anchor1, desc2, anchor2, shift1=0, shift2
       tobase = current==base ? ident(4) : linear_solve(current[0],base[0]);   // Maps from current frame into the base frame
       auxmap = linear_solve(base[0], aux[0]);   // Map from the base (desc1) coordinate frame into the aux (desc2) coordinate frame
 
-    dummy = assert(is_vector(base_anchor) || is_string(base_anchor), "anchor1 must be a string or a 3-vector")
+      dummy = 
-            assert(is_vector(aux_anchor) || is_string(aux_anchor), "anchor2 must be a string or a 3-vector")    
               assert(is_rotation(auxmap), "desc1 and desc2 are not related to each other by a rotation (and translation)");
 
       base_type = _get_obj_type(1,base[1],base_anchor,profile);

skin.scad

@@ -3417,7 +3417,7 @@ function associate_vertices(polygons, split, curpoly=0) =
 // Topics: Textures, Knurling
 // Synopsis: Produce a standard texture. 
 // Topics: Extrusion, Textures
-// See Also: linear_sweep(), rotate_sweep(), heightfield(), cylindrical_heightfield()
+// See Also: linear_sweep(), rotate_sweep(), cyl(), vnf_vertex_array(), sweep(), path_sweep(), textured_tile()
 // Usage:
 //   tx = texture(tex, [n=], [inset=], [gap=], [roughness=]);
 // Description:

utility.scad

@@ -884,6 +884,7 @@ module deprecate(new_name)
 //   echo_viewport();
 // Description:
 //   Display the current viewport parameters so that they can be pasted into examples for the wiki.
+//   The viewport should have a 4x3 aspect ratio to ensure proper framing of the object.  
 
 module echo_viewport()
 {