--- ray/src/rt/ray.h	1990/12/15 16:41:44	1.4
+++ ray/src/rt/ray.h	1991/05/23 08:12:57	1.5
@@ -50,3 +50,9 @@ typedef struct ray {
 }  RAY;
 
 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 */