Added source code

utils/quadrant.scad

@@ -0,0 +1,40 @@
+//
+// 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/>.
+//
+
+//
+//! Square with one rounded corner.
+//
+include <../core.scad>
+
+module quadrant(w, r, center = false) { //! Draw a square with one rounded corner, can be centered on the arc centre, when ```center``` is ```true```.
+    offset = center ? r - w : 0;
+    translate([offset, offset])
+        hull() {
+            intersection() {
+                translate([w - r, w - r])
+                    circle4n(r);
+
+                square(w);
+            }
+
+            square([w, eps]);
+
+            square([eps, w]);
+        }
+}