--- ray/src/rt/source.c	1990/01/11 11:06:22	1.19
+++ ray/src/rt/source.c	1990/12/13 10:44:04	1.24
@@ -47,10 +47,7 @@ marksources()			/* find and mark source objects */
 
 		m = objptr(o->omod);
 
-		if (m->otype != MAT_LIGHT &&
-				m->otype != MAT_ILLUM &&
-				m->otype != MAT_GLOW &&
-				m->otype != MAT_SPOT)
+		if (!islight(m->otype))
 			continue;
 	
 		if (m->oargs.nfargs != (m->otype == MAT_GLOW ? 4 :
@@ -310,6 +307,8 @@ char  *p;			/* data for f */
 	double  prob, ourthresh, hwt, test2, hit2;
 	RAY  sr;
 
+	if (nsources <= 0)
+		return;
 	srccnt = (CONTRIB *)malloc(nsources*sizeof(CONTRIB));
 	cntord = (CNTPTR *)malloc(nsources*sizeof(CNTPTR));
 	if (srccnt == NULL || cntord == NULL)
@@ -395,7 +394,7 @@ char  *p;			/* data for f */
 	}
 					/* weighted hit rate */
 	hwt = hit2 / test2;
-#ifdef notdef
+#ifdef DEBUG
 	sprintf(errmsg, "%d tested, %d untested, %f hit rate\n",
 			sn, ncnts-sn, hwt);
 	eputs(errmsg);
@@ -408,8 +407,8 @@ char  *p;			/* data for f */
 		addcolor(r->rcol, srccnt[cntord[sn].sno].val);
 	}
 		
-	free(srccnt);
-	free(cntord);
+	free((char *)srccnt);
+	free((char *)cntord);
 }
 
 
@@ -453,8 +452,7 @@ register RAY  *r;
 				  m->oargs.farg[2]);
 						/* modify value */
 		multcolor(r->rcol, r->pcol);
+						/* assign distance */
+		r->rt = r->rot;
 	}
 }
-
-
-o_source() {}		/* intersection with a source is done elsewhere */