--- ray/src/common/mat4.h	2003/05/13 17:58:32	2.6
+++ ray/src/common/mat4.h	2003/06/06 16:38:47	2.7
@@ -1,7 +1,12 @@
-/* RCSid $Id: mat4.h,v 2.6 2003/05/13 17:58:32 greg Exp $ */
+/* RCSid $Id: mat4.h,v 2.7 2003/06/06 16:38:47 schorsch Exp $ */
 /*
  * Definitions for 4x4 matrix operations
  */
+#ifndef _RAD_MAT4_H_
+#define _RAD_MAT4_H_
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 #include "copyright.h"
 
@@ -22,18 +27,15 @@ extern MAT4  m4ident;
 
 #define  setident4(m4)		copymat4(m4, m4ident)
 
-#ifdef NOPROTO
 
-extern void	multmat4();
-extern void	multv3();
-extern void	multp3();
-extern int	invmat4();
-
-#else
-
 extern void	multmat4(MAT4 m4a, MAT4 m4b, MAT4 m4c);
 extern void	multv3(FVECT v3a, FVECT v3b, MAT4 m4);
 extern void	multp3(FVECT p3a, FVECT p3b, MAT4 m4);
 extern int	invmat4(MAT4 inverse, MAT4 mat);
 
+
+#ifdef __cplusplus
+}
 #endif
+#endif /* _RAD_MAT4_H_ */
+