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-rw-r--r--src/dxftess-glu.cc12
1 files changed, 12 insertions, 0 deletions
diff --git a/src/dxftess-glu.cc b/src/dxftess-glu.cc
index 9e5f530..73eae63 100644
--- a/src/dxftess-glu.cc
+++ b/src/dxftess-glu.cc
@@ -1,3 +1,15 @@
+#include "dxftess.h"
+#include "dxfdata.h"
+#include "polyset.h"
+#include "grid.h"
+
+#ifdef ENABLE_OPENCSG
+// this must be included before the GL headers
+# include <GL/glew.h>
+#endif
+#include <qgl.h>
+#include <math.h>
+
#ifdef WIN32
# define STDCALL __stdcall
#else
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