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-rw-r--r--src/game-server/collisiondetection.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/game-server/collisiondetection.cpp b/src/game-server/collisiondetection.cpp
index bf8c7ce..562f440 100644
--- a/src/game-server/collisiondetection.cpp
+++ b/src/game-server/collisiondetection.cpp
@@ -27,6 +27,9 @@
#define D_TO_R 0.0174532925 // PI / 180
#define R_TO_D 57.2957795 // 180 / PI
+#ifndef M_PI
+#define M_PI 3.14159265358979323846
+#endif
// Tests to see if pos is between s1 degree and s2
#define test_degrees(pos,s1,s2) (pos > s1 && pos < s2) || (s1 > s2 && !(pos < s1 && pos > s2))