--- ray/src/util/rtpict.pl	2020/04/08 16:20:00	2.18
+++ ray/src/util/rtpict.pl	2022/04/11 04:03:36	2.22
@@ -1,5 +1,5 @@
 #!/usr/bin/perl -w
-# RCSid $Id: rtpict.pl,v 2.18 2020/04/08 16:20:00 greg Exp $
+# RCSid $Id: rtpict.pl,v 2.22 2022/04/11 04:03:36 greg Exp $
 #
 # Run rtrace in parallel mode to simulate rpict -n option
 # May also be used to render layered images with -o* option
@@ -21,19 +21,22 @@ my @boolO = ('-w', '-bv', '-dv', '-i', '-u');
 # view options and the associated number of arguments
 my %vwraysC = ('-vf',1, '-vtv',0, '-vtl',0, '-vth',0, '-vta',0, '-vts',0, '-vtc',0,
 		'-x',1, '-y',1, '-vp',3, '-vd',3, '-vu',3, '-vh',1, '-vv',1,
-		'-vo',1, '-va',1, '-vs',1, '-vl',1, '-pa',1, '-pj',1);
+		'-vo',1, '-va',1, '-vs',1, '-vl',1, '-pa',1, '-pj',1, '-pd',1);
 # options we need to silently ignore
-my %ignoreC = ('-t',1, '-ps',1, '-pt',1, '-pm',1, '-pd',1);
+my %ignoreC = ('-t',1, '-ps',1, '-pt',1, '-pm',1,);
 # Starting options for rtrace (rpict values)
 my @rtraceA = split(' ', 'rtrace -u- -dt .05 -dc .5 -ds .25 -dr 1 ' .
 				'-aa .2 -ar 64 -ad 512 -as 128 -lr 7 -lw 1e-03');
-my @vwraysA = ('vwrays', '-ff', '-pj', '.67');
+my @vwraysA = ('vwrays', '-pj', '.67');
 my @vwrightA = ('vwright', '-vtv');
 my @rpictA = ('rpict', '-ps', '1');
 my $outpatt = '^-o[vrxlLRXnNsmM]+';
 my $refDepth = "";
 my $irrad = 0;
 my $persist = 0;
+my $ambounce = 0;
+my $ambcache = 1;
+my $ambfile;
 my $outlyr;
 my $outdir;
 my $outpic;
@@ -77,7 +80,15 @@ while ($#ARGV >= 0 && "$ARGV[0]" =~ /^[-\@]/) {
 	}
 	# Check rtrace options
 	if (defined $rtraceC{$ARGV[0]}) {
-		$persist ||= ("$ARGV[0]" =~ /^-PP?$/);
+		if ("$ARGV[0]" =~ /^-PP?$/) {
+			$persist = 1;
+		} elsif ("$ARGV[0]" eq '-ab') {
+			$ambounce = $ARGV[1];
+		} elsif ("$ARGV[0]" eq '-aa') {
+			$ambcache = ($ARGV[1] > 0.0);
+		} elsif ("$ARGV[0]" eq '-af') {
+			$ambfile = "$ARGV[1]";
+		}
 		push @rtraceA, $ARGV[0];
 		push @rpictA, shift(@ARGV);
 		for (my $i = $rtraceC{$rpictA[-1]}; $i-- > 0; ) {
@@ -139,16 +150,43 @@ my $view = `@vwrightA 0`;
 chomp $view;
 my @res = split(/\s/, `@vwraysA -d`);
 #####################################################################
+##### Resort pixels to reduce ambient cache collisions?
+if ($nprocs > 1 && $ambounce > 0 && $ambcache && defined($ambfile)) {
+	if (!defined($outzbf) && !defined($outdir)) {
+		# Straight picture output, so just randomize sample order
+		system "cnt $res[1] $res[3] | sort -R > /tmp/ord$$.txt";
+		die "sort error\n" if ( $? );
+		system "@vwraysA -ff -i < /tmp/ord$$.txt " .
+			"| @rtraceA -ffa -ov '$oct' > /tmp/pix$$.txt";
+		die "Error running rtrace\n" if ( $? );
+		system "( getinfo < /tmp/pix$$.txt ; getinfo - < /tmp/pix$$.txt " .
+			"| rlam /tmp/ord$$.txt - | sort -k2rn -k1n ) " .
+			"| pvalue -r -Y $res[3] +X $res[1] | getinfo -a 'VIEW=$view'";
+		die "rlam error\n" if ( $? );
+		unlink ("/tmp/ord$$.txt", "/tmp/pix$$.txt");
+		exit 0;
+	}
+	# Else randomize overture calculation to prime ambient cache
+	my $oxres = int($res[1]/6);
+	my $oyres = int($res[3]/6);
+	print STDERR "Running $oxres by $oyres overture calculation " .
+			"to populate '$ambfile'...\n";
+	system "@vwraysA -x $oxres -y $oyres -pj 0 " .
+		"| sort -R | @rtraceA -faf -ov '$oct' > /dev/null";
+	die "Failure running overture\n" if ( $? );
+	print STDERR "Finished overture.\n";
+}
+#####################################################################
 ##### Generating picture with depth buffer?
 if (defined $outzbf) {
-	exec "@vwraysA | @rtraceA -fff -olv @res '$oct' | " .
+	exec "@vwraysA -ff | @rtraceA -fff -olv @res '$oct' | " .
 		"rsplit -ih -iH -f -of '$outzbf' -oh -oH -of3 - | " .
 		"pvalue -r -df | getinfo -a 'VIEW=$view'";
 }
 #####################################################################
 ##### Base case with output picture only?
 if (! defined $outdir) {
-	exec "@vwraysA | @rtraceA -ffc @res '$oct' | getinfo -a 'VIEW=$view'";
+	exec "@vwraysA -ff | @rtraceA -ffc @res '$oct' | getinfo -a 'VIEW=$view'";
 }
 #####################################################################
 ##### Layered image output case
@@ -197,4 +235,4 @@ foreach my $oval (split //, $outlyr) {
 	delete $rtoutC{$oval};
 }
 			# call rtrace + rsplit
-exec "@vwraysA | @rtraceA -fff @res '$oct' | getinfo -a 'VIEW=$view' | @rsplitA";
+exec "@vwraysA -ff | @rtraceA -fff @res '$oct' | getinfo -a 'VIEW=$view' | @rsplitA";