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-rw-r--r--includes/defines.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/includes/defines.h b/includes/defines.h
index 41eeee0..8867284 100644
--- a/includes/defines.h
+++ b/includes/defines.h
@@ -43,6 +43,8 @@
#define MAX_DISTANCE sqrt(pow(XRES, 2)+pow(YRES, 2))
+#define GRAV_DIFF
+
#define MAXSIGNS 16
#define TAG_MAX 256