Merge branch 'master' into revarbat_dev

regions.scad

@@ -701,6 +701,8 @@ function offset(
            :
             [for(i=[0:len(goodsegs)-1])
                 let(prevseg=select(goodsegs,i-1))
+                i==0 && !closed ? false  // In open case first entry is bogus
+               :  
                 (goodsegs[i][1]-goodsegs[i][0]) * (goodsegs[i][0]-sharpcorners[i]) > 0
                  && (prevseg[1]-prevseg[0]) * (sharpcorners[i]-prevseg[1]) > 0
             ],

rounding.scad

@@ -376,9 +376,11 @@ function _rounding_offsets(edgespec,z_dir=1) =
                 r = struct_val(edgespec,"r"),
                 cut = struct_val(edgespec,"cut"),
                 k = struct_val(edgespec,"k"),
-                radius = in_list(edgetype,["circle","teardrop"])?
-                        (is_def(cut) ? cut/(sqrt(2)-1) : r) :
-                        edgetype=="chamfer"? first_defined([sqrt(2)*cut,r]) : undef,
+                radius = in_list(edgetype,["circle","teardrop"])
+                            ? (is_def(cut) ? cut/(sqrt(2)-1) : r)
+                         :edgetype=="chamfer"
+                            ? (is_def(cut) ? sqrt(2)*cut : r)
+                         : undef,
                 chamf_angle = struct_val(edgespec, "angle"),
                 cheight = struct_val(edgespec, "chamfer_height"),
                 cwidth = struct_val(edgespec, "chamfer_width"),

screws.scad

@@ -310,7 +310,9 @@ function _screw_info_english(diam, threadcount, head, thread, drive) =
                [2,    [      3,   1.5, undef, undef, undef]],
             ],
             entry = struct_val(UTS_socket, diam),
-            hexdepth = is_def(entry[3]) ? entry[3] : if_def(diam) ? diam/2 : undef,
+            hexdepth = is_def(entry[3]) ? entry[3]
+                     : is_def(diam) ? diam/2
+                     : undef,
             drive_size =  drive=="hex" ? [["drive_size",inch*entry[1]], ["drive_depth",inch*hexdepth]] :
                           drive=="torx" ? [["drive_size",entry[2]],["drive_depth",inch*entry[4]]] : []
             )

skin.scad

@@ -801,8 +801,7 @@ function associate_vertices(polygons, split, curpoly=0) =
    curpoly==len(polygons)-1 ? polygons :
    let(
       polylen = len(polygons[curpoly]),
-      cursplit = force_list(split[curpoly]),
-     fdsa= echo(cursplit=cursplit)
+      cursplit = force_list(split[curpoly])
    )
     assert(len(split)==len(polygons)-1,str(split,"Split list length mismatch: it has length ", len(split)," but must have length ",len(polygons)-1))
     assert(polylen<=len(polygons[curpoly+1]),str("Polygon ",curpoly," has more vertices than the next one."))

version.scad

@@ -6,7 +6,7 @@
 //////////////////////////////////////////////////////////////////////
 
 
-BOSL_VERSION = [2,0,562];
+BOSL_VERSION = [2,0,565];
 
 
 // Section: BOSL Library Version Functions