Import of existing parts

1 files changed, 41 insertions, 0 deletions

diff --git a/parts/tetrahedron_connector.scad b/parts/tetrahedron_connector.scad
new file mode 100644
index 0000000..eb345d2
--- /dev/null
+++ b/parts/tetrahedron_connector.scad
@@ -0,0 +1,41 @@
+
+radius = 8.25;
+inner_radius = 13.5;
+wall = 6;
+top_wall = 6;
+len = 40;
+cut = 10;
+
+module external(radius, wall, len, top_wall) {
+    w = len/2+radius+(radius+wall)*sin(60) ;
+    h = (radius + wall) / 2;
+    difference() {
+        translate([-len/2-radius,0,0]) rotate([0,30,0]) cylinder(r = radius + wall, h = len + top_wall); 
+        translate ([-w,-w,-h]) cube([w*2, w*2, h*2]);
+    }
+}
+
+module tube(radius, wall, len) {
+    translate([-len/2-radius,0,0]) rotate([0,30,0]) translate([0,0,-wall/2]) cylinder(r = radius, h = len);
+}
+
+difference() {
+    union() {
+        hull() {
+            external(radius, wall, len, top_wall);
+            rotate([0,0,120]) external(radius, wall, len, top_wall);
+            rotate([0,0,-120]) external(radius, wall, len, top_wall);
+        }
+        difference() {
+            translate([0,0,-(radius + wall) / 2]) hull() {
+                external(radius, wall*3, len, top_wall);
+                rotate([0,0,120]) external(radius, wall*3, len, top_wall);
+                rotate([0,0,-120]) external(radius, wall*3, len, top_wall);
+            }
+            translate([0,0,len/2]) rotate([0,10,0]) cylinder(r=(len+wall), h=cut);
+        }
+    }
+    tube(radius, wall, len);
+    rotate([0,0,120]) tube(radius, wall, len);
+    rotate([0,0,-120]) tube(radius, wall, len);
+}