wip on base connector

helper/common.scad

@@ -10,3 +10,38 @@ inf10 = 10;
 inf50 = 50;
 inf1000 = 1000;
 inf = inf1000;
+
+
+module apply_p() {
+  union() {
+    children(0);
+    children(1);
+  }
+}
+
+module apply_n() {
+  difference() {
+    children(1);
+    children(0);
+  }
+}
+
+module apply_pn() {
+  difference() {
+    union() {
+      children(0);
+      children(2);
+    }
+    children(1);
+  }
+}
+
+module apply_np() {
+  difference() {
+    union() {
+      children(1);
+      children(2);
+    }
+    children(0);
+  }
+}