added a corner_3d_connectors page

vitamins/corner_3d_connectors.scad

@@ -0,0 +1,27 @@
+//
+// NopSCADlib Copyright Chris Palmer 2021
+// 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/>.
+//
+
+//                                                     sdia   nd   nt  nnt nsx  nty1 nty2
+corner_3d_connector_2020 = ["corner_3d_connector_2020", 20,    5,   13,     2.5,    4,  6,  3.5,5,  15.5,10,    6,   [0.5], [0.5]];
+corner_3d_connector_3030 = ["corner_3d_connector_3030", 29.6,6.2,   22,     2.5,    6,  8,  4.2,6.2,24.9,16,    11,   [0.25,0.75], [0.65]];
+corner_3d_connector_4040 = ["corner_3d_connector_4040", 40,9.5,     25,     2.5,    6,  8,  5,  9.5,34.0,19.5,  14,   [0.25,0.75], [0.65]];
+
+corner_3d_connectors = [corner_3d_connector_2020,corner_3d_connector_3030,corner_3d_connector_4040];
+
+use <corner_3d_connector.scad>