selectable round/square duct section

1 files changed, 21 insertions, 8 deletions

diff --git a/fanduct.scad b/fanduct.scad
index 53630a3..746f753 100644
--- a/fanduct.scad
+++ b/fanduct.scad
@@ -34,5 +34,6 @@ smooth_f = 120;
 type="3jets"; // "3jets" ; // circular|3jets
+ductshape="square"; // square|round
 
 
-module fanduct(type=type) {
+module fanduct(type=type,ductshape=ductshape) {
 
@@ -44,5 +45,9 @@ module fanduct(type=type) {
    rotate_extrude($fn=smooth_f)
-   translate([sh/2+fanduct_ir,sv/2])
-   scale([sh/smax,sv/smax])
-   circle(d=smax,$fn=4*smax);
+    if(ductshape=="round")
+     translate([sh/2+fanduct_ir,sv/2])
+     scale([sh/smax,sv/smax])
+     circle(d=smax,$fn=4*smax);
+    else if(ductshape=="square")
+     translate([fanduct_ir,0])
+     square([sh,sv]);
   }else if(what=="out") {
@@ -51,5 +56,13 @@ module fanduct(type=type) {
    rotate_extrude($fn=smooth_f)
-   translate([sh/2+fanduct_shell+fanduct_ir,sv/2+fanduct_shell])
-   scale([sh/smax,sv/smax])
-   circle(d=smax,$fn=4*smax);
+    if(ductshape=="round")
+     translate([sh/2+fanduct_shell+fanduct_ir,sv/2+fanduct_shell])
+     scale([sh/smax,sv/smax])
+     circle(d=smax,$fn=4*smax);
+    else if(ductshape=="square")
+     translate([fanduct_ir+fanduct_shell,fanduct_shell])
+     union() {
+      square([fanduct_w,fanduct_h/2]);
+      translate([fanduct_w/2,fanduct_h-fanduct_w/2])
+      rotate([0,0,90]) circle(d=fanduct_w,$fn=36);
+     } 
   }
@@ -242,3 +255,3 @@ module fanduct(type=type) {
 
-view="full"; // hcut|vcut|*
+view="vcut"; // hcut|vcut|*