From 5dff2bc54d97d2792efd114a4823de4163a8a473 Mon Sep 17 00:00:00 2001
From: Michael Krelin <hacker@klever.net>
Date: Mon, 27 Jun 2016 20:49:16 +0000
Subject: mold: default value for horizontal protrusion.

---
diff --git a/mold.scad b/mold.scad
index d5354b0..e4f93fc 100644
--- a/mold.scad
+++ b/mold.scad
@@ -1,7 +1,7 @@
 module mold(
 	size,		/* mold inner size */
 	s=1,		/* shell thickness */
-	h_protrude=5,	/* how far to protrude outside horizontally */
+	h_protrude=-1,	/* how far to protrude outside horizontally, default is size[2] */
 	v_protrude=10,	/* and vertically */
 	l_intrude=0,	/* how far to intrude on the left */
 	r_intrude=0,	/* how far to intrude on the right */
@@ -23,7 +23,8 @@ module mold(
   }
  }
  gw = 3*s; // guide width, in case I'll want to change it.
- module trusion(in) {
+ h_protrude_ = h_protrude<0 ? size[2] : h_protrude;
+ module trusion(in,gw=gw,h_protrude=h_protrude_) {
   translate([-gw/2,0,s+size[2]]) union() {
    hull() {
     translate([0,0,in])
--
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