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#!/usr/bin/perl -w |
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# RCSid $Id: genBSDF.pl,v 2.50 2015/03/04 17:42:54 greg Exp $ |
3 |
# |
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# Compute BSDF based on geometry and material description |
5 |
# |
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# G. Ward |
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# |
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use strict; |
9 |
my $windoz = ($^O eq "MSWin32" or $^O eq "MSWin64"); |
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use File::Temp qw/ :mktemp /; |
11 |
sub userror { |
12 |
print STDERR "Usage: genBSDF [-n Nproc][-c Nsamp][-W][-t{3|4} Nlog2][-r \"ropts\"][-f \"x=string;y=string\"][-dim xmin xmax ymin ymax zmin zmax][{+|-}C][{+|-}f][{+|-}b][{+|-}mgf][{+|-}geom units] [input ..]\n"; |
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exit 1; |
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} |
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my ($td,$radscn,$mgfscn,$octree,$fsender,$bsender,$receivers,$facedat,$behinddat,$rmtmp); |
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my ($tf,$rf,$tb,$rb,$tfx,$rfx,$tbx,$rbx,$tfz,$rfz,$tbz,$rbz); |
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if ($windoz) { |
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my $tmploc = `echo \%TMP\%`; |
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chomp($tmploc); |
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$td = mkdtemp("$tmploc\\genBSDF.XXXXXX"); |
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$radscn = "$td\\device.rad"; |
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$mgfscn = "$td\\device.mgf"; |
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$octree = "$td\\device.oct"; |
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$fsender = "$td\\fsender.rad"; |
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$bsender = "$td\\bsender.rad"; |
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$receivers = "$td\\receivers.rad"; |
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$facedat = "$td\\face.dat"; |
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$behinddat = "$td\\behind.dat"; |
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$tf = "$td\\tf.dat"; |
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$rf = "$td\\rf.dat"; |
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$tb = "$td\\tb.dat"; |
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$rb = "$td\\rb.dat"; |
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$tfx = "$td\\tfx.dat"; |
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$rfx = "$td\\rfx.dat"; |
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$tbx = "$td\\tbx.dat"; |
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$rbx = "$td\\rbx.dat"; |
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$tfz = "$td\\tfz.dat"; |
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$rfz = "$td\\rfz.dat"; |
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$tbz = "$td\\tbz.dat"; |
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$rbz = "$td\\rbz.dat"; |
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chomp $td; |
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$rmtmp = "rmdir /S /Q $td"; |
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} else { |
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$td = mkdtemp("/tmp/genBSDF.XXXXXX"); |
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chomp $td; |
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$radscn = "$td/device.rad"; |
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$mgfscn = "$td/device.mgf"; |
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$octree = "$td/device.oct"; |
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$fsender = "$td/fsender.rad"; |
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$bsender = "$td/bsender.rad"; |
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$receivers = "$td/receivers.rad"; |
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$facedat = "$td/face.dat"; |
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$behinddat = "$td/behind.dat"; |
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$tf = "$td/tf.dat"; |
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$rf = "$td/rf.dat"; |
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$tb = "$td/tb.dat"; |
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$rb = "$td/rb.dat"; |
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$tfx = "$td/tfx.dat"; |
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$rfx = "$td/rfx.dat"; |
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$tbx = "$td/tbx.dat"; |
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$rbx = "$td/rbx.dat"; |
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$tfz = "$td/tfz.dat"; |
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$rfz = "$td/rfz.dat"; |
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$tbz = "$td/tbz.dat"; |
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$rbz = "$td/rbz.dat"; |
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$rmtmp = "rm -rf $td"; |
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} |
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my @savedARGV = @ARGV; |
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my $rfluxmtx = "rfluxmtx -v -ab 5 -ad 700 -lw 3e-6"; |
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my $wrapper = "wrapBSDF"; |
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my $tensortree = 0; |
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my $ttlog2 = 4; |
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my $nsamp = 2000; |
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my $mgfin = 0; |
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my $geout = 1; |
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my $nproc = 1; |
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my $docolor = 0; |
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my $doforw = 0; |
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my $doback = 1; |
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my $pctcull = 90; |
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my $gunit = "meter"; |
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my $curspec = "Visible"; |
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my @dim; |
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# Get options |
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while ($#ARGV >= 0) { |
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if ("$ARGV[0]" =~ /^[-+]m/) { |
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$mgfin = ("$ARGV[0]" =~ /^\+/); |
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} elsif ("$ARGV[0]" eq "-r") { |
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$rfluxmtx .= " $ARGV[1]"; |
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shift @ARGV; |
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} elsif ("$ARGV[0]" =~ /^[-+]g/) { |
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$geout = ("$ARGV[0]" =~ /^\+/); |
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$gunit = $ARGV[1]; |
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if ($gunit !~ /^(?i)(meter|foot|inch|centimeter|millimeter)$/) { |
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die "Illegal geometry unit '$gunit': must be meter, foot, inch, centimeter, or millimeter\n"; |
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} |
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shift @ARGV; |
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} elsif ("$ARGV[0]" =~ /^[-+]C/) { |
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$docolor = ("$ARGV[0]" =~ /^\+/); |
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} elsif ("$ARGV[0]" =~ /^[-+]f/) { |
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$doforw = ("$ARGV[0]" =~ /^\+/); |
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} elsif ("$ARGV[0]" =~ /^[-+]b/) { |
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$doback = ("$ARGV[0]" =~ /^\+/); |
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} elsif ("$ARGV[0]" eq "-t") { |
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# Use value < 0 for rttree_reduce bypass |
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$pctcull = $ARGV[1]; |
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shift @ARGV; |
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} elsif ("$ARGV[0]" =~ /^-t[34]$/) { |
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$tensortree = substr($ARGV[0], 2, 1); |
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$ttlog2 = $ARGV[1]; |
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shift @ARGV; |
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} elsif ("$ARGV[0]" eq "-f") { |
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$wrapper .= " -f \"$ARGV[1]\""; |
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shift @ARGV; |
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} elsif ("$ARGV[0]" eq "-W") { |
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$wrapper .= " -W"; |
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} elsif ("$ARGV[0]" eq "-c") { |
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$nsamp = $ARGV[1]; |
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shift @ARGV; |
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} elsif ("$ARGV[0]" eq "-n") { |
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$nproc = $ARGV[1]; |
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shift @ARGV; |
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} elsif ("$ARGV[0]" =~ /^-d/) { |
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userror() if ($#ARGV < 6); |
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@dim = @ARGV[1..6]; |
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shift @ARGV for (1..6); |
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} elsif ("$ARGV[0]" =~ /^[-+]./) { |
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userror(); |
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} else { |
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last; |
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} |
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shift @ARGV; |
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} |
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# Check that we're actually being asked to do something |
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die "Must have at least one of +forward or +backward\n" if (!$doforw && !$doback); |
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# Issue warning for unhandled reciprocity case |
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print STDERR "Warning: recommend both +forward and +backward with -t3\n" if |
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($tensortree==3 && !($doforw && $doback)); |
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$wrapper .= $tensortree ? " -a t$tensortree" : " -a kf -c"; |
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$wrapper .= " -u $gunit"; |
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# Get scene description and dimensions |
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if ( $mgfin ) { |
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system "mgf2rad @ARGV > $radscn"; |
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die "Could not load MGF input\n" if ( $? ); |
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} else { |
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system "xform -e @ARGV > $radscn"; |
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die "Could not load Radiance input\n" if ( $? ); |
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} |
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if ($#dim != 5) { |
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@dim = split ' ', `getbbox -h $radscn`; |
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} |
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print STDERR "Warning: Device extends into room\n" if ($dim[5] > 1e-5); |
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$wrapper .= ' -f "t=' . ($dim[5] - $dim[4]) . ';w=' . ($dim[1] - $dim[0]) . |
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';h=' . ($dim[3] - $dim[2]) . '"'; |
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# Generate octree |
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system "oconv -w $radscn > $octree"; |
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die "Could not compile scene\n" if ( $? ); |
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# Add MGF description if requested |
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if ( $geout ) { |
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open(MGFSCN, "> $mgfscn"); |
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printf MGFSCN "xf -t %.6f %.6f 0\n", -($dim[0]+$dim[1])/2, -($dim[2]+$dim[3])/2; |
162 |
close MGFSCN; |
163 |
if ( $mgfin ) { |
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system qq{mgfilt "#,o,xf,c,cxy,cspec,cmix,m,sides,rd,td,rs,ts,ir,v,p,n,f,fh,sph,cyl,cone,prism,ring,torus" @ARGV >> $mgfscn}; |
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} else { |
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system "rad2mgf $radscn >> $mgfscn"; |
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} |
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open(MGFSCN, ">> $mgfscn"); |
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print MGFSCN "xf\n"; |
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close MGFSCN; |
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$wrapper .= " -g $mgfscn"; |
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} |
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# Create receiver & sender surfaces (rectangular) |
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my $nx = int(sqrt($nsamp*($dim[1]-$dim[0])/($dim[3]-$dim[2])) + 1); |
175 |
my $ny = int($nsamp/$nx + 1); |
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$nsamp = $nx * $ny; |
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my $ns = 2**$ttlog2; |
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open(RADSCN, "> $receivers"); |
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print RADSCN '#@rfluxmtx ' . ($tensortree ? "h=sc$ns\n" : "h=kf\n"); |
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print RADSCN '#@rfluxmtx ' . "u=Y o=$facedat\n\n"; |
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print RADSCN "void glow receiver_face\n0\n0\n4 1 1 1 0\n\n"; |
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print RADSCN "receiver_face source f_receiver\n0\n0\n4 0 0 1 180\n\n"; |
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print RADSCN '#@rfluxmtx ' . "u=Y o=$behinddat\n\n"; |
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print RADSCN "void glow receiver_behind\n0\n0\n4 1 1 1 0\n\n"; |
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print RADSCN "receiver_behind source b_receiver\n0\n0\n4 0 0 -1 180\n"; |
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close RADSCN; |
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# Finish rfluxmtx command and prepare sender surfaces |
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$rfluxmtx .= " -n $nproc -c $nsamp"; |
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if ( $tensortree != 3 ) { # Isotropic tensor tree is exception |
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open (RADSCN, "> $fsender"); |
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print RADSCN '#@rfluxmtx u=Y ' . ($tensortree ? "h=sc$ns\n\n" : "h=kf\n\n"); |
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print RADSCN "void polygon fwd_sender\n0\n0\n12\n"; |
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printf RADSCN "\t%f\t%f\t%f\n", $dim[0], $dim[2], $dim[4]; |
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printf RADSCN "\t%f\t%f\t%f\n", $dim[0], $dim[3], $dim[4]; |
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printf RADSCN "\t%f\t%f\t%f\n", $dim[1], $dim[3], $dim[4]; |
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printf RADSCN "\t%f\t%f\t%f\n", $dim[1], $dim[2], $dim[4]; |
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close RADSCN; |
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open (RADSCN, "> $bsender"); |
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print RADSCN '#@rfluxmtx u=Y ' . ($tensortree ? "h=sc$ns\n\n" : "h=kf\n\n"); |
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print RADSCN "void polygon fwd_sender\n0\n0\n12\n"; |
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printf RADSCN "\t%f\t%f\t%f\n", $dim[0], $dim[2], $dim[5]; |
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printf RADSCN "\t%f\t%f\t%f\n", $dim[1], $dim[2], $dim[5]; |
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printf RADSCN "\t%f\t%f\t%f\n", $dim[1], $dim[3], $dim[5]; |
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printf RADSCN "\t%f\t%f\t%f\n", $dim[0], $dim[3], $dim[5]; |
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close RADSCN; |
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} |
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# Create data segments (all the work happens here) |
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if ( $tensortree ) { |
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do_tree_bsdf(); |
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} else { |
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do_matrix_bsdf(); |
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} |
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# Output XML |
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my $old_fh = select(STDOUT); |
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$| = 1; |
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select($old_fh); |
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print "<!-- Created by: genBSDF @savedARGV -->\n"; |
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# print STDERR "Running: $wrapper\n"; |
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system $wrapper; |
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die "Could not wrap BSDF data\n" if ( $? ); |
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# Clean up temporary files and exit |
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system $rmtmp; |
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|
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#-------------- End of main program segment --------------# |
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|
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#++++++++++++++ Tensor tree BSDF generation ++++++++++++++# |
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sub do_tree_bsdf { |
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|
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# Run rfluxmtx processes to compute each side |
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do_ttree_dir(0) if ( $doback ); |
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do_ttree_dir(1) if ( $doforw ); |
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|
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} # end of sub do_tree_bsdf() |
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|
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# Call rfluxmtx and process tensor tree BSDF for the given direction |
236 |
sub do_ttree_dir { |
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my $forw = shift; |
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my $cmd; |
239 |
if ( $tensortree == 3 ) { |
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# Isotropic BSDF |
241 |
my $ns2 = $ns / 2; |
242 |
if ($windoz) { |
243 |
$cmd = "cnt $ns2 $ny $nx " . |
244 |
qq{| rcalc -e "r1=rand(.8681*recno-.673892)" } . |
245 |
qq{-e "r2=rand(-5.37138*recno+67.1737811)" } . |
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qq{-e "r3=rand(+3.17603772*recno+83.766771)" } . |
247 |
qq{-e "Dx=1-2*(\$1+r1)/$ns;Dy:0;Dz=sqrt(1-Dx*Dx)" } . |
248 |
qq{-e "xp=(\$3+r2)*(($dim[1]-$dim[0])/$nx)+$dim[0]" } . |
249 |
qq{-e "yp=(\$2+r3)*(($dim[3]-$dim[2])/$ny)+$dim[2]" } . |
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qq{-e "zp=$dim[5-$forw]" -e "myDz=Dz*($forw*2-1)" } . |
251 |
qq{-e "\$1=xp-Dx;\$2=yp-Dy;\$3=zp-myDz" } . |
252 |
qq{-e "\$4=Dx;\$5=Dy;\$6=myDz" } . |
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"| $rfluxmtx -fa -y $ns2 - $receivers -i $octree"; |
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} else { |
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$cmd = "cnt $ns2 $ny $nx " . |
256 |
qq{| rcalc -e "r1=rand(.8681*recno-.673892)" } . |
257 |
qq{-e "r2=rand(-5.37138*recno+67.1737811)" } . |
258 |
qq{-e "r3=rand(+3.17603772*recno+83.766771)" } . |
259 |
qq{-e "Dx=1-2*(\$1+r1)/$ns;Dy:0;Dz=sqrt(1-Dx*Dx)" } . |
260 |
qq{-e "xp=(\$3+r2)*(($dim[1]-$dim[0])/$nx)+$dim[0]" } . |
261 |
qq{-e "yp=(\$2+r3)*(($dim[3]-$dim[2])/$ny)+$dim[2]" } . |
262 |
qq{-e "zp=$dim[5-$forw]" -e "myDz=Dz*($forw*2-1)" } . |
263 |
qq{-e '\$1=xp-Dx;\$2=yp-Dy;\$3=zp-myDz' } . |
264 |
qq{-e '\$4=Dx;\$5=Dy;\$6=myDz' -of } . |
265 |
"| $rfluxmtx -h -ff -y $ns2 - $receivers -i $octree"; |
266 |
} |
267 |
} else { |
268 |
# Anisotropic BSDF |
269 |
my $sender = ($bsender,$fsender)[$forw]; |
270 |
if ($windoz) { |
271 |
$cmd = "$rfluxmtx -fa $sender $receivers -i $octree"; |
272 |
} else { |
273 |
$cmd = "$rfluxmtx -h -ff $sender $receivers -i $octree"; |
274 |
} |
275 |
} |
276 |
# print STDERR "Starting: $cmd\n"; |
277 |
system $cmd; |
278 |
die "Failure running rfluxmtx" if ( $? ); |
279 |
ttree_out($forw); |
280 |
} # end of do_ttree_dir() |
281 |
|
282 |
# Simplify and store tensor tree results |
283 |
sub ttree_out { |
284 |
my $forw = shift; |
285 |
my ($refldat,$transdat); |
286 |
if ( $forw ) { |
287 |
$transdat = $facedat; |
288 |
$refldat = $behinddat; |
289 |
} else { |
290 |
$transdat = $behinddat; |
291 |
$refldat = $facedat; |
292 |
} |
293 |
# Only output one transmitted anisotropic distribution, preferring backwards |
294 |
if ( !$forw || !$doback || $tensortree==3 ) { |
295 |
my $ttyp = ("tb","tf")[$forw]; |
296 |
ttree_comp($ttyp, "Visible", $transdat, ($tb,$tf)[$forw]); |
297 |
if ( $docolor ) { |
298 |
ttree_comp($ttyp, "CIE-X", $transdat, ($tbx,$tfx)[$forw]); |
299 |
ttree_comp($ttyp, "CIE-Z", $transdat, ($tbz,$tfz)[$forw]); |
300 |
} |
301 |
} |
302 |
# Output reflection |
303 |
my $rtyp = ("rb","rf")[$forw]; |
304 |
ttree_comp($rtyp, "Visible", $refldat, ($rb,$rf)[$forw]); |
305 |
if ( $docolor ) { |
306 |
ttree_comp($rtyp, "CIE-X", $refldat, ($rbx,$rfx)[$forw]); |
307 |
ttree_comp($rtyp, "CIE-Z", $refldat, ($rbz,$rfz)[$forw]); |
308 |
} |
309 |
} # end of ttree_out() |
310 |
|
311 |
# Call rttree_reduce on the given component |
312 |
sub ttree_comp { |
313 |
my $typ = shift; |
314 |
my $spec = shift; |
315 |
my $src = shift; |
316 |
my $dest = shift; |
317 |
my $cmd; |
318 |
if ($windoz) { |
319 |
if ("$spec" eq "Visible") { |
320 |
$cmd = qq{rcalc -e "Omega:PI/($ns*$ns)" } . |
321 |
q{-e "$1=(0.265*$1+0.670*$2+0.065*$3)/Omega"}; |
322 |
} elsif ("$spec" eq "CIE-X") { |
323 |
$cmd = qq{rcalc -e "Omega:PI/($ns*$ns)" } . |
324 |
q{-e "$1=(0.514*$1+0.324*$2+0.162*$3)/Omega"}; |
325 |
} elsif ("$spec" eq "CIE-Z") { |
326 |
$cmd = qq{rcalc -e "Omega:PI/($ns*$ns)" } . |
327 |
q{-e "$1=(0.024*$1+0.123*$2+0.853*$3)/Omega"}; |
328 |
} |
329 |
} else { |
330 |
if ("$spec" eq "Visible") { |
331 |
$cmd = "rcalc -if3 -e 'Omega:PI/($ns*$ns)' " . |
332 |
q{-e '$1=(0.265*$1+0.670*$2+0.065*$3)/Omega'}; |
333 |
} elsif ("$spec" eq "CIE-X") { |
334 |
$cmd = "rcalc -if3 -e 'Omega:PI/($ns*$ns)' " . |
335 |
q{-e '$1=(0.514*$1+0.324*$2+0.162*$3)/Omega'}; |
336 |
} elsif ("$spec" eq "CIE-Z") { |
337 |
$cmd = "rcalc -if3 -e 'Omega:PI/($ns*$ns)' " . |
338 |
q{-e '$1=(0.024*$1+0.123*$2+0.853*$3)/Omega'}; |
339 |
} |
340 |
} |
341 |
if ($pctcull >= 0) { |
342 |
my $avg = ( "$typ" =~ /^r[fb]/ ) ? " -a" : ""; |
343 |
if ($windoz) { |
344 |
$cmd = "rcollate -ho -oc 1 $src | " . |
345 |
$cmd . |
346 |
" | rttree_reduce$avg -h -fa -t $pctcull -r $tensortree -g $ttlog2"; |
347 |
} else { |
348 |
$cmd .= " -of $src " . |
349 |
"| rttree_reduce$avg -h -ff -t $pctcull -r $tensortree -g $ttlog2"; |
350 |
} |
351 |
# print STDERR "Running: $cmd\n"; |
352 |
system "$cmd > $dest"; |
353 |
die "Failure running rttree_reduce" if ( $? ); |
354 |
} else { |
355 |
if ($windoz) { |
356 |
$cmd = "rcollate -ho -oc 1 $src | " . $cmd ; |
357 |
} else { |
358 |
$cmd .= " $src"; |
359 |
} |
360 |
open(DATOUT, "> $dest"); |
361 |
print DATOUT "{\n"; |
362 |
close DATOUT; |
363 |
# print STDERR "Running: $cmd\n"; |
364 |
system "$cmd >> $dest"; |
365 |
die "Failure running rcalc" if ( $? ); |
366 |
open(DATOUT, ">> $dest"); |
367 |
for (my $i = ($tensortree==3)*$ns*$ns*$ns/2; $i-- > 0; ) { |
368 |
print DATOUT "0\n"; |
369 |
} |
370 |
print DATOUT "}\n"; |
371 |
close DATOUT; |
372 |
} |
373 |
if ( "$spec" ne "$curspec" ) { |
374 |
$wrapper .= " -s $spec"; |
375 |
$curspec = $spec; |
376 |
} |
377 |
$wrapper .= " -$typ $dest"; |
378 |
} # end of ttree_comp() |
379 |
|
380 |
#------------- End of do_tree_bsdf() & subroutines -------------# |
381 |
|
382 |
#+++++++++++++++ Klems matrix BSDF generation +++++++++++++++# |
383 |
sub do_matrix_bsdf { |
384 |
|
385 |
# Run rfluxmtx processes to compute each side |
386 |
do_matrix_dir(0) if ( $doback ); |
387 |
do_matrix_dir(1) if ( $doforw ); |
388 |
|
389 |
} # end of sub do_matrix_bsdf() |
390 |
|
391 |
# Call rfluxmtx and process tensor tree BSDF for the given direction |
392 |
sub do_matrix_dir { |
393 |
my $forw = shift; |
394 |
my $cmd; |
395 |
my $sender = ($bsender,$fsender)[$forw]; |
396 |
$cmd = "$rfluxmtx -fd $sender $receivers -i $octree"; |
397 |
# print STDERR "Starting: $cmd\n"; |
398 |
system $cmd; |
399 |
die "Failure running rfluxmtx" if ( $? ); |
400 |
matrix_out($forw); |
401 |
} # end of do_matrix_dir() |
402 |
|
403 |
sub matrix_out { |
404 |
my $forw = shift; |
405 |
my ($refldat,$transdat); |
406 |
if ( $forw ) { |
407 |
$transdat = $facedat; |
408 |
$refldat = $behinddat; |
409 |
} else { |
410 |
$transdat = $behinddat; |
411 |
$refldat = $facedat; |
412 |
} |
413 |
# Output transmission |
414 |
my $ttyp = ("tb","tf")[$forw]; |
415 |
matrix_comp($ttyp, "Visible", $transdat, ($tb,$tf)[$forw]); |
416 |
if ( $docolor ) { |
417 |
matrix_comp($ttyp, "CIE-X", $transdat, ($tbx,$tfx)[$forw]); |
418 |
matrix_comp($ttyp, "CIE-Z", $transdat, ($tbz,$tfz)[$forw]); |
419 |
} |
420 |
# Output reflection |
421 |
my $rtyp = ("rb","rf")[$forw]; |
422 |
matrix_comp($rtyp, "Visible", $refldat, ($rb,$rf)[$forw]); |
423 |
if ( $docolor ) { |
424 |
matrix_comp($rtyp, "CIE-X", $refldat, ($rbx,$rfx)[$forw]); |
425 |
matrix_comp($rtyp, "CIE-Z", $refldat, ($rbz,$rfz)[$forw]); |
426 |
} |
427 |
} # end of matrix_out() |
428 |
|
429 |
# Transpose matrix component data and save to file |
430 |
sub matrix_comp { |
431 |
my $typ = shift; |
432 |
my $spec = shift; |
433 |
my $src = shift; |
434 |
my $dest = shift; |
435 |
my $cmd = "rmtxop -fa -t"; |
436 |
if ("$spec" eq "Visible") { |
437 |
$cmd .= " -c 0.265 0.670 0.065"; |
438 |
} elsif ("$spec" eq "CIE-X") { |
439 |
$cmd .= " -c 0.514 0.324 0.162"; |
440 |
} elsif ("$spec" eq "CIE-Z") { |
441 |
$cmd .= " -c 0.024 0.123 0.853"; |
442 |
} |
443 |
$cmd .= " $src | rcollate -ho"; |
444 |
# print STDERR "Running: $cmd\n"; |
445 |
system "$cmd > $dest"; |
446 |
die "Failure running rttree_reduce" if ( $? ); |
447 |
if ( "$spec" ne "$curspec" ) { |
448 |
$wrapper .= " -s $spec"; |
449 |
$curspec = $spec; |
450 |
} |
451 |
$wrapper .= " -$typ $dest"; |
452 |
} # end of matrix_comp() |
453 |
|
454 |
#------------- End of do_matrix_bsdf() & subroutines --------------# |