From 82fc340a0a608eb1edf8c079b4585cf0880733df Mon Sep 17 00:00:00 2001
From: alberth <alberth@openttd.org>
Date: Fri, 9 Jul 2010 12:14:02 +0000
Subject: (svn r20097) -Codechange: Share constant bitset of safe level
 crossing slopes.

---
 src/slope_type.h | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src/slope_type.h')

diff --git a/src/slope_type.h b/src/slope_type.h
index 0098eedf6..5eb7a7a20 100644
--- a/src/slope_type.h
+++ b/src/slope_type.h
@@ -79,6 +79,11 @@ enum Slope {
 };
 DECLARE_ENUM_AS_BIT_SET(Slope)
 
+#define M(x) (1 << (x))
+/** Constant bitset with safe slopes for building a level crossing. */
+static const uint32 VALID_LEVEL_CROSSING_SLOPES = M(SLOPE_SEN) | M(SLOPE_ENW) | M(SLOPE_NWS) | M(SLOPE_NS) | M(SLOPE_WSE) | M(SLOPE_EW) | M(SLOPE_FLAT);
+#undef M
+
 
 /**
  * Enumeration for Foundations.
-- 
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