From 75e3ff448db8cba668e540f85a70c3af54ffcc1a Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sun, 5 Nov 2017 22:31:06 +0000
Subject: [PATCH] matrix seems right

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---
 genscad           | 6 +++---
 moebius-demo.scad | 2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/genscad b/genscad
index 9063c36..a8e319e 100755
--- a/genscad
+++ b/genscad
@@ -123,9 +123,9 @@ def make_pinlocations():
   for b in bests:
     along = unit_v(np.cross(b[1], unit_z))
     upwards = np.cross(b[1], along)
-    matrix = [ b[1],
-               upwards,
-               along ]
+    matrix = [ along,
+               -upwards,
+               -b[1] ]
     print('initial', matrix, file=sys.stderr)
     matrix = np.concatenate((matrix, [[0,0,0]]))
     print('concatd', matrix, file=sys.stderr)
diff --git a/moebius-demo.scad b/moebius-demo.scad
index 8f827bd..52dae71 100644
--- a/moebius-demo.scad
+++ b/moebius-demo.scad
@@ -99,7 +99,7 @@ module PinDemo(){
   for (i=[0,1]) {
     translate( moebius_pin_locns[i] * moebiuscore_nomsize ) {
       multmatrix(moebius_pin_matrix[i])
-	cube(center=true, [1,4,9]);
+	cube([1,4,9]);
     }
   }
 }
-- 
2.30.2