From f543f3bbc870d0b77cb9b5ad652963af9a70fbf3 Mon Sep 17 00:00:00 2001
From: Michael Orlitzky <michael@orlitzky.com>
Date: Wed, 7 Sep 2011 19:16:39 -0400
Subject: [PATCH] Add the 'drop_z' function.

---
 src/Values.hs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/Values.hs b/src/Values.hs
index 614fb75..d7ede83 100644
--- a/src/Values.hs
+++ b/src/Values.hs
@@ -87,3 +87,8 @@ zoom_shape (sfx, sfy, sfz) sh =
         z' = z * sfz
     in
       (Z :. x' :. y' :. z')
+
+
+drop_z :: DIM3 -> DIM2
+drop_z (Z :. 1 :. y :. x) = (Z :. y :. x)
+drop_z _ = error "can't drop the z-dimension unless its size is 1"
-- 
2.43.2