Can now make perfboards with screws holes only at one end.

I.e. for making models of chopped down boards.

CHANGELOG.md

@@ -3,6 +3,9 @@
 This changelog is generated by `changelog.py` using manually added semantic version tags to classify commits as breaking changes, additions or fixes.
 
 
+#### [v16.0.1](https://github.com/nophead/NopSCADlib/releases/tag/v16.0.1 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v16.0.0...v16.0.1 "diff with v16.0.0")
+*   2021-09-12 [`f0c25d3`](https://github.com/nophead/NopSCADlib/commit/f0c25d37b0c19f76c3f3e0b4d9cabc7587f9efb5 "show commit") [C.P.](# "Chris Palmer") Workarounds for bugs in the OpenSCAD snapshots.
+
 ## [v16.0.0](https://github.com/nophead/NopSCADlib/releases/tag/v16.0.0 "show release") Breaking Changes [...](https://github.com/nophead/NopSCADlib/compare/v15.25.0...v16.0.0 "diff with v15.25.0")
 *   2021-09-11 [`3299aad`](https://github.com/nophead/NopSCADlib/commit/3299aad5c83d1fe21d3bdddd1450f8de19078d13 "show commit") [C.P.](# "Chris Palmer") Parametric potentiometers added, changes PCB "potentiometer" parameters.
 The first one is now the type that defaults to the previous BigTreeTech version.

scripts/tests.py

@@ -72,7 +72,7 @@ def update_image(tmp_name, png_name):
     if pixels < 0 or pixels > threshold:
         shutil.copyfile(tmp_name, png_name)
         print(Fore.YELLOW + png_name + " updated" + Fore.WHITE, pixels if pixels > 0 else '')
-        if png_name.endswith('_tn.png'):
+        if png_name.endswith('_tn.png') and os.path.isfile(diff_name):
             os.remove(diff_name)
     else:
         os.utime(png_name, None)

vitamins/pcb.scad

@@ -1196,9 +1196,10 @@ module pcb(type) { //! Draw specified PCB
                         }
                     if(fr4 && len(grid) < 3 && pcb_holes(type)) { // oval lands at the ends
                         screw_x = pcb_coord(type, pcb_holes(type)[0]).x;
+                        both_ends = len(pcb_holes(type)) > 2;
                         y0 = pcb_grid(type).y;
                         rows = round((pcb_width(type) - 2 * y0) / inch(0.1));
-                        for(end = [-1, 1], y = [1 : rows - 1])
+                        for(end = both_ends ? [-1, 1] : [1], y = [1 : rows - 1])
                             translate([end * screw_x, y0 + y * inch(0.1) - pcb_width(type) / 2])
                                 hull()
                                     for(x = [-1, 1])