From fcde5d4f2fd95845402b86c3838f15b6632a8071 Mon Sep 17 00:00:00 2001
From: Thomas White <taw@physics.org>
Date: Mon, 15 Nov 2010 16:15:18 +0100
Subject: Flip beam direction in OpenCL code as well

---
 data/diffraction.cl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'data')

diff --git a/data/diffraction.cl b/data/diffraction.cl
index 8b6ece99..4262a1ec 100644
--- a/data/diffraction.cl
+++ b/data/diffraction.cl
@@ -74,7 +74,7 @@ float4 get_q(int x, int y, float cx, float cy, float res, float clen, float k,
 
 	q = (float4)(k*native_sin(tt)*native_cos(az),
 	             k*native_sin(tt)*native_sin(az),
-	             k-k*native_cos(tt), 0.0);
+	             k*(native_cos(tt)-1.0), 0.0);
 
 	return quat_rot(q, z);
 }
-- 
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