From 5fe2bb0f4559cffba3e79fe19d00dac1b1e8058d Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Wed, 3 Oct 2012 21:38:47 +0100
Subject: [PATCH] add echo of square width and height to ensure they're +ve

---
 pawn.scad | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/pawn.scad b/pawn.scad
index 98b5f66..abf2a61 100644
--- a/pawn.scad
+++ b/pawn.scad
@@ -38,7 +38,10 @@ $fa=1;
 $fs=0.1;
 
 module SegmentBasisSquare(zmin, zmax, xmin){
-  translate([xmin, zmin-d]) square([-xmin+d, zmax-zmin+d*2]);
+  sqw = -xmin+d;
+  sqh = zmax-zmin+d*2;
+  echo(sqw,sqh);
+  translate([xmin, zmin-d]) square([sqw, sqh]);
 }
 module ConvexSegment(xc, zc, r, zmin, zmax){
   intersection(){
-- 
2.30.2