toolbox-inserts: RatchetHandle: crooked well, using shear

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/toolbox-inserts.scad b/toolbox-inserts.scad
index 1dbd119970a6cafcd992f89a76496f0e27019ba9..ae6ab5a4671bd363b5eca6bdceff0ce33dd3f603 100644 (file)
--- a/toolbox-inserts.scad
+++ b/toolbox-inserts.scad
@@ -436,10 +436,11 @@ module RatchetHandleWell() { ////toplevel
   pivot_ratio =
     (ratchet_handle_grip_end_h - ratchet_handle_head_d0)/2 /
     (ratchet_handle_grip_end_x - ratchet_handle_head_end_x);
-  pivot_ang = atan(pivot_ratio);
 
   translate(pivot)
-    rotate([0, pivot_ang, 0])
+    multmatrix([[            1, 0, 0, 0 ],
+               [            0, 1, 0, 0 ],
+               [ -pivot_ratio, 0, 1, 0 ]])
     translate(-pivot)
     RatchetHandlePositive();
 }