--- ray/src/rt/rtrace.c	2005/06/02 04:47:27	2.43
+++ ray/src/rt/rtrace.c	2006/04/05 06:22:57	2.53
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char	RCSid[] = "$Id: rtrace.c,v 2.43 2005/06/02 04:47:27 greg Exp $";
+static const char	RCSid[] = "$Id: rtrace.c,v 2.53 2006/04/05 06:22:57 greg Exp $";
 #endif
 /*
  *  rtrace.c - program and variables for individual ray tracing.
@@ -29,6 +29,7 @@ static const char	RCSid[] = "$Id: rtrace.c,v 2.43 2005
 #include  "source.h"
 #include  "otypes.h"
 #include  "resolu.h"
+#include  "random.h"
 
 CUBE  thescene;				/* our scene */
 OBJECT	nsceneobjs;			/* number of objects in our scene */
@@ -46,11 +47,15 @@ char  *outvals = "v";			/* output specification */
 
 int  do_irrad = 0;			/* compute irradiance? */
 
+int  rand_samp = 0;			/* pure Monte Carlo sampling? */
+
 void  (*trace)() = NULL;		/* trace call */
 
 char  *tralist[128];			/* list of modifers to trace (or no) */
 int  traincl = -1;			/* include == 1, exclude == 0 */
-#define	 MAXTSET	511		/* maximum number in trace set */
+#ifndef  MAXTSET
+#define	 MAXTSET	8192		/* maximum number in trace set */
+#endif
 OBJECT	traset[MAXTSET+1]={0};		/* trace include/exclude set */
 
 int  hresolu = 0;			/* horizontal (scan) size */
@@ -74,7 +79,7 @@ double  specjitter = 1.;		/* specular sampling jitter 
 
 int  backvis = 1;			/* back face visibility */
 
-int  maxdepth = 8;			/* maximum recursion depth */
+int  maxdepth = -10;			/* maximum recursion depth */
 double  minweight = 2e-3;		/* minimum ray weight */
 
 char  *ambfile = NULL;			/* ambient file name */
@@ -96,7 +101,7 @@ typedef void putf_t(double v);
 static putf_t puta, putd, putf;
 
 typedef void oputf_t(RAY *r);
-static oputf_t  oputo, oputd, oputv, oputl, oputL, oputc, oputp,
+static oputf_t  oputo, oputd, oputv, oputV, oputl, oputL, oputc, oputp,
 		oputn, oputN, oputs, oputw, oputW, oputm, oputM, oputtilde;
 
 static void setoutput(char *vs);
@@ -148,7 +153,8 @@ rtrace(				/* trace rays from file */
 	char  *fname
 )
 {
-	long  vcount = hresolu>1 ? hresolu*vresolu : vresolu;
+	unsigned long  vcount = (hresolu > 1) ? (unsigned long)hresolu*vresolu
+					      : vresolu;
 	long  nextflush = hresolu;
 	FILE  *fp;
 	double	d;
@@ -187,7 +193,7 @@ rtrace(				/* trace rays from file */
 		d = normalize(direc);
 		if (d == 0.0) {				/* zero ==> flush */
 			bogusray();
-			if (--nextflush <= 0 || vcount <= 0) {
+			if (--nextflush <= 0 || !vcount) {
 				fflush(stdout);
 				nextflush = hresolu;
 			}
@@ -199,18 +205,19 @@ rtrace(				/* trace rays from file */
 			else
 				rad(orig, direc, lim_dist ? d : 0.0);
 							/* flush if time */
-			if (--nextflush == 0) {
+			if (!--nextflush) {
 				fflush(stdout);
 				nextflush = hresolu;
 			}
 		}
 		if (ferror(stdout))
 			error(SYSTEM, "write error");
-		if (--vcount == 0)			/* check for end */
+		if (vcount && !--vcount)		/* check for end */
 			break;
 	}
-	fflush(stdout);
-	if (vcount > 0)
+	if (fflush(stdout) < 0)
+		error(SYSTEM, "write error");
+	if (vcount)
 		error(USER, "unexpected EOF on input");
 	if (fname != NULL)
 		fclose(fp);
@@ -258,6 +265,12 @@ setoutput(				/* set up output tables */
 			*table++ = oputv;
 			castonly = 0;
 			break;
+		case 'V':				/* contribution */
+			*table++ = oputV;
+			if (ambounce > 0 && (ambacc > FTINY || ambssamp > 0))
+				error(WARNING,
+					"-otV accuracy depends on -aa 0 -as 0");
+			break;
 		case 'l':				/* effective distance */
 			*table++ = oputl;
 			castonly = 0;
@@ -525,6 +538,21 @@ oputv(				/* print value */
 
 
 static void
+oputV(				/* print value contribution */
+	RAY *r
+)
+{
+	double	contr[3];
+
+	raycontrib(contr, r, PRIMARY);
+	multcolor(contr, r->rcol);
+	(*putreal)(contr[RED]);
+	(*putreal)(contr[GRN]);
+	(*putreal)(contr[BLU]);
+}
+
+
+static void
 oputl(				/* print effective distance */
 	RAY  *r
 )
@@ -629,16 +657,16 @@ oputw(				/* print weight */
 
 
 static void
-oputW(				/* print contribution */
+oputW(				/* print coefficient */
 	RAY  *r
 )
 {
-	COLOR	contr;
+	double	contr[3];
 
 	raycontrib(contr, r, PRIMARY);
-	(*putreal)(colval(contr,RED));
-	(*putreal)(colval(contr,GRN));
-	(*putreal)(colval(contr,BLU));
+	(*putreal)(contr[RED]);
+	(*putreal)(contr[GRN]);
+	(*putreal)(contr[BLU]);
 }