--- ray/src/rt/func.h	1991/11/25 09:49:47	2.1
+++ ray/src/rt/func.h	2003/06/07 00:54:58	2.4
@@ -1,12 +1,18 @@
-/* Copyright (c) 1991 Regents of the University of California */
-
-/* SCCSid "$SunId$ LBL" */
-
+/* RCSid $Id: func.h,v 2.4 2003/06/07 00:54:58 schorsch Exp $ */
 /*
  * Header file for modifiers using function files.
- * Include after standard.h.
+ *
+ * Include after ray.h
  */
+#ifndef _RAD_FUNC_H_
+#define _RAD_FUNC_H_
+#ifdef __cplusplus
+extern "C" {
+#endif
 
+
+#include "copyright.h"
+
 #include  "calcomp.h"
 
 #define  MAXEXPR	9	/* maximum expressions in modifier */
@@ -20,4 +26,15 @@ typedef struct {
 extern XF  unitxf;		/* identity transform */
 extern XF  funcxf;		/* current transform */
 
-extern MFUNC  *getfunc();	/* get MFUNC structure for modifier */
+
+extern MFUNC	*getfunc(OBJREC *m, int ff, unsigned int ef, int dofwd);
+extern void	freefunc(OBJREC *m);
+extern int	setfunc(OBJREC *m, RAY *r);
+extern void	loadfunc(char *fname);
+
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* _RAD_FUNC_H_ */
+