--- ray/src/rt/source.c	1992/08/28 14:07:41	2.4
+++ ray/src/rt/source.c	1992/08/28 15:10:50	2.5
@@ -183,6 +183,41 @@ RAY  *r;
 }
 
 
+sourcehit(r)			/* check to see if ray hit distant source */
+register RAY  *r;
+{
+	int  first, last;
+	register int  i;
+
+	if (r->rsrc >= 0) {		/* check only one if aimed */
+		first = last = r->rsrc;
+	} else {			/* otherwise check all */
+		first = 0; last = nsources-1;
+	}
+	for (i = first; i <= last; i++)
+		if ((source[i].sflags & (SDISTANT|SVIRTUAL)) == SDISTANT)
+			/*
+			 * Check to see if ray is within
+			 * solid angle of source.
+			 */
+			if (2.0*PI * (1.0 - DOT(source[i].sloc,r->rdir))
+					<= source[i].ss2) {
+				r->ro = source[i].so;
+				if (!(source[i].sflags & SSKIP))
+					break;
+			}
+
+	if (r->ro != NULL) {
+		for (i = 0; i < 3; i++)
+			r->ron[i] = -r->rdir[i];
+		r->rod = 1.0;
+		r->rox = NULL;
+		return(1);
+	}
+	return(0);
+}
+
+
 static int
 cntcmp(sc1, sc2)			/* contribution compare (descending) */
 register CNTPTR  *sc1, *sc2;