--- ray/src/rt/ray.h	1989/02/02 10:41:14	1.1
+++ ray/src/rt/ray.h	1991/06/20 13:29:31	1.6
@@ -1,4 +1,4 @@
-/* Copyright (c) 1986 Regents of the University of California */
+/* Copyright (c) 1990 Regents of the University of California */
 
 /* SCCSid "$SunId$ LBL" */
 
@@ -37,15 +37,27 @@ typedef struct ray {
 	int  rsrc;		/* source we're aiming for */
 	OBJECT  *clipset;	/* set of objects currently clipped */
 	OBJECT  *newcset;	/* next clipset, used for transmission */
+	int  (*revf)();		/* evaluation function for this ray */
  	OBJREC  *ro;		/* intersected object */
 	double  rot;		/* distance to object */
 	FVECT  rop;		/* intersection point */
 	FVECT  ron;		/* intersection surface normal */
 	double  rod;		/* -DOT(rdir, ron) */
-	double  ros, rox[4][4];	/* transform back to object space */
+	FULLXF  *rox;		/* object transformation */
 	FVECT  pert;		/* surface normal perturbation */
 	COLOR  pcol;		/* pattern color */
 	COLOR  rcol;		/* returned ray value */
+	double  rt;		/* returned effective ray length */
 }  RAY;
 
+extern int  raytrace();
+
 extern double  raynormal();
+
+extern int  dimlist[];		/* dimension list for distribution */
+extern int  ndims;		/* number of dimensions so far */
+extern int  samplendx;		/* index for this sample */
+
+#define  MAXDIM		16	/* maximum number of dimensions */
+
+#define  rayvalue(r)	(*(r)->revf)(r)