+/*
+Copyright (C) 2014 Daniel Watson
+See the end of the file for license conditions.
+*/
+
+module nut_2d(size) {
+ side_length = size * sin(30) / sin(120);
+ for(ii = [-1:1]) {
+ rotate(a = 120 * ii, v = [0, 0, 1]) {
+ square([side_length, size], center = true); } } }
+
+module nut(size, height) {
+ linear_extrude(height = height) {
+ nut_2d(size); } }
+
+/*
+This file is part of challenge-bot.
+
+Printables is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+GNU Affero Emacs 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 Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with Printables. If not, see <http://www.gnu.org/licenses/>.
+*/