Added source code

utils/rounded_cylinder.scad

@@ -0,0 +1,47 @@
+//
+// NopSCADlib Copyright Chris Palmer 2018
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+//
+
+//
+//! Cylinder with a rounded end.
+//
+include <../core.scad>
+
+module rounded_corner(r, h, r2, ir = 0) { //! 2D version
+    assert(ir <= r - r2);
+
+    translate([ir , 0])
+        hull() {
+            square([eps, h]);
+
+            square([r - ir, eps]);
+
+            translate([r - r2 - ir, h - r2])
+                intersection() {
+                    circle4n(r2, $fs = 0.2);
+
+                    square(r2);
+                }
+        }
+}
+
+module rounded_cylinder(r, h, r2, ir = 0, angle = 360) //! Rounded cylinder given radius ```r```, height ```h```, optional internal radius ```ir``` and optional ```angle```
+{
+    rotate_extrude(angle = angle)
+        rounded_corner(r, h, r2, ir);
+}