From 4ea397e11edfb5ef711e52a0d4088943df052d7b Mon Sep 17 00:00:00 2001
From: taw27 <taw27@bf6ca9ba-c028-0410-8290-897cf20841d1>
Date: Tue, 12 Aug 2008 16:30:06 +0000
Subject: Improve numerical stability of reprojection

git-svn-id: svn://cook.msm.cam.ac.uk:745/diff-tomo/dtr@285 bf6ca9ba-c028-0410-8290-897cf20841d1
---
 src/utils.h | 1 +
 1 file changed, 1 insertion(+)

(limited to 'src/utils.h')

diff --git a/src/utils.h b/src/utils.h
index 5736739..5c2e586 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -30,6 +30,7 @@ extern double distance3d(double x1, double y1, double z1, double x2, double y2,
 extern size_t skipspace(const char *s);
 extern void chomp(char *s);
 extern void matrix_vector_show(const gsl_matrix *m, const gsl_vector *v, const char *prefix);
+extern int sign(double a);
 
 #define rad2deg(a) ((a)*180/M_PI)
 #define deg2rad(a) ((a)*M_PI/180)
-- 
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