fairphone-case: fix SideButton calculations

nfc with the one current caller

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

diff --git a/fairphone-case.scad b/fairphone-case.scad
index 07a2ca199f6cea07af94a0ebb7f0d5e066a455fc..572b6e0fcaab510ea31bcc2588cba59d6fa1e190 100644 (file)
--- a/fairphone-case.scad
+++ b/fairphone-case.scad
@@ -265,8 +265,8 @@ module SideButton(y, y_ref_sign, l){
   //    0  y is centre of button in coordinate system
   $button_l= l;
   eff_y = y_ref_sign > 0 ?         -bumper [1] -y -l/2 :
-         y_ref_sign < 0 ? (-phone +bumper)[1] +y +l/2 :
-         -y;
+         y_ref_sign < 0 ? (-phone -bumper)[1] +y +l/2 :
+         y;
   echo(eff_y);
   translate([0, eff_y, 0])
     children();