--- ray/src/rt/func.h	2011/02/18 00:40:25	2.8
+++ ray/src/rt/func.h	2012/06/09 07:16:47	2.9
@@ -1,4 +1,4 @@
-/* RCSid $Id: func.h,v 2.8 2011/02/18 00:40:25 greg Exp $ */
+/* RCSid $Id: func.h,v 2.9 2012/06/09 07:16:47 greg Exp $ */
 /*
  * Header file for modifiers using function files.
  *
@@ -18,16 +18,17 @@ extern "C" {
 typedef struct {
 	EPNODE  *ep[MAXEXPR+1];		/* NULL-terminated expression list */
 	char  *ctx;			/* context (from file name) */
-	XF  *f, *b;			/* forward and backward transforms */
+	XF  *fxp, *bxp;			/* forward and backward transforms */
 } MFUNC;			/* material function */
 
 extern XF  unitxf;		/* identity transform */
 extern XF  funcxf;		/* current transform */
 
-
+extern void	initfunc(void);
 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 int	worldfunc(char *ctx, RAY *r);
 extern void	loadfunc(char *fname);
 
 	/* defined in noise3.c */