From ddcb05f6038a09c767a612a2d8ce984ef6589930 Mon Sep 17 00:00:00 2001
From: Michael Krelin <hacker@klever.net>
Date: Mon, 13 Jun 2016 16:00:48 +0000
Subject: dualism: output

---
diff --git a/fanduct.scad b/fanduct.scad
index b9689c9..0cd89f7 100644
--- a/fanduct.scad
+++ b/fanduct.scad
@@ -212,7 +212,34 @@ module fanduct(type=type,ductshape=ductshape,dual=dual) {
    }
   }
 
-  if(type=="circular") circus(what);
+  module dual(what=what) {
+   module hulls(spots=dual_spots) {
+    for(my=[0,1]) mirror([0,my,0]) for(pn=[0:1:len(spots)-2]) hull() {
+     for(p=[spots[pn],spots[pn+1]]) translate(p) children(0);
+     children([1:$children-1]);
+    }
+   }
+   if(what=="in") {
+    difference() {
+     hulls() {
+      cylinder(d=fanduct_w+2*fanduct_shell,h=2*fanduct_shell+fanduct_h/2);
+      translate([0,-nozzles_apart/2,-fanduct_elevation-fanduct_blowtarget]) sphere(d=.1);
+     }
+     translate([0,0,epsilon]) hull() for(my=[0:1]) mirror([0,my,0]) for(s=dual_spots) translate(s)
+      mirror([0,0,1]) cylinder(d=fanduct_w+2*fanduct_shell+2,h=fanduct_elevation-fanduct_blowtarget+1);
+     for(s=[-1,1]) translate([0,s*nozzles_apart/2,-1])
+      cylinder(r=hotend_clearance,h=fanduct_h+2*fanduct_shell+2,$fn=smooth_f);
+    }
+   }else if(what=="out") {
+    hulls() {
+     translate([0,0,fanduct_shell]) cylinder(d=fanduct_w,h=fanduct_h/2-fanduct_shell/2);
+     translate([0,-nozzles_apart/2,-fanduct_elevation+fanduct_blowtarget]) sphere(d=.1);
+    }
+   }
+  }
+
+  if(dual) dual(what);
+  else if(type=="circular") circus(what);
   else if(type=="3jets") jets(what);
  }
 
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