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-rw-r--r--geometry.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/geometry.cpp b/geometry.cpp
index a8be3f4..ad29438 100644
--- a/geometry.cpp
+++ b/geometry.cpp
@@ -1,5 +1,7 @@
#include "geometry.h"
+#include <cmath>
+
static const float PI = 3.1415f;
int calculateCircleVertexCount(float diameter)