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# G. Ward |
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# |
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use strict; |
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use File::Temp qw/ :mktemp /; |
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sub userror { |
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< |
print STDERR "Usage: genBSDF [-n Nproc][-c Nsamp][-dim xmin xmax ymin ymax zmin zmax][{+|-}mgf][{+|-}geom] [input ..]"; |
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> |
print STDERR "Usage: genBSDF [-n Nproc][-c Nsamp][-r \"ropts\"][-dim xmin xmax ymin ymax zmin zmax][{+|-}f][{+|-}b][{+|-}mgf][{+|-}geom] [input ..]\n"; |
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exit 1; |
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} |
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< |
my $td = `mktemp -d /tmp/genBSDF.XXXXXX`; |
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> |
my $td = mkdtemp("/tmp/genBSDF.XXXXXX"); |
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chomp $td; |
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my $nsamp = 1000; |
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my $rtargs = "-w -ab 5 -ad 700 -lw 3e-6"; |
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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 $doforw = 0; |
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my $doback = 1; |
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my @dim; |
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# Get options |
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while ($#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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$rtargs = "$rtargs $ARGV[1]"; |
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shift @ARGV; |
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} elsif ("$ARGV[0]" =~ /^[-+]g/) { |
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$geout = ("$ARGV[0]" =~ /^\+/); |
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} 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 ("$ARGV[0]" eq "-c") { |
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$nsamp = $ARGV[1]; |
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shift @ARGV; |
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shift @ARGV; |
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} elsif ("$ARGV[0]" =~ /^-d/) { |
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userror() if ($#ARGV < 6); |
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@dim = "@ARGV[1..6]"; |
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@dim = @ARGV[1..6]; |
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shift @ARGV for (1..6); |
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} elsif ("$ARGV[0]" =~ /^[-+]./) { |
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userror(); |
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} |
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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" if (!$doforw && !$doback); |
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# Get scene description and dimensions |
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my $radscn = "$td/device.rad"; |
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my $mgfscn = "$td/device.mgf"; |
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die "Could not load MGF input\n" if ( $? ); |
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system "mgf2rad $mgfscn > $radscn"; |
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} else { |
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system "cat @ARGV | xform -e > $radscn"; |
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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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system "rad2mgf $radscn > $mgfscn" if ( $geout ); |
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} |
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if ($#dim != 5) { |
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@dim = split /\s+/, `getbbox -h $radscn`; |
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shift @dim; |
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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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# Add receiver surface (rectangle) |
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my $modnm="_receiver_black_"; |
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# Add receiver surfaces (rectangular) |
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my $fmodnm="receiver_face"; |
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my $bmodnm="receiver_behind"; |
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open(RADSCN, ">> $radscn"); |
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print RADSCN "void glow $modnm\n0\n0\n4 0 0 0 0\n\n"; |
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print RADSCN "$modnm polygon _receiver_\n0\n0\n12\n"; |
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print RADSCN "\t",$dim[0],"\t",$dim[2],"\t",$dim[5]+1e-5,"\n"; |
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print RADSCN "\t",$dim[0],"\t",$dim[3],"\t",$dim[5]+1e-5,"\n"; |
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print RADSCN "\t",$dim[1],"\t",$dim[3],"\t",$dim[5]+1e-5,"\n"; |
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print RADSCN "\t",$dim[1],"\t",$dim[2],"\t",$dim[5]+1e-5,"\n"; |
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print RADSCN "void glow $fmodnm\n0\n0\n4 1 1 1 0\n\n"; |
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print RADSCN "$fmodnm source f_receiver\n0\n0\n4 0 0 1 180\n"; |
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print RADSCN "void glow $bmodnm\n0\n0\n4 1 1 1 0\n\n"; |
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print RADSCN "$bmodnm source b_receiver\n0\n0\n4 0 0 -1 180\n"; |
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close RADSCN; |
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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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# Set up sampling |
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# Set up sampling of interior portal |
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# Kbin to produce incident direction in full Klems basis with (x1,x2) randoms |
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my $tcal = ' |
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DEGREE : PI/180; |
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sq(x) : x*x; |
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Kpola(r) : select(r+1, -5, 5, 15, 25, 35, 45, 55, 65, 75, 90); |
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Knaz(r) : select(r, 1, 8, 16, 20, 24, 24, 24, 16, 12); |
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Kaccum(r) : if(r-.5, Knaz(r) + Kaccum(r-1), 0); |
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Kfindrow(r, rem) : if(rem-Knaz(r)+.5, Kfindrow(r+1, rem-Knaz(r)), r); |
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Krow = if(Kbin-(Kmax-.5), 0, Kfindrow(1, Kbin)); |
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Kcol = Kbin - Kaccum(Krow-1); |
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Kazi = 360*DEGREE * (Kcol + .5 - x2) / Knaz(Krow); |
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Kazi = 360*DEGREE * (Kcol + (.5 - x2)) / Knaz(Krow); |
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Kpol = DEGREE * (x1*Kpola(Krow) + (1-x1)*Kpola(Krow-1)); |
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sin_kpol = sin(Kpol); |
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Dx = -cos(Kazi)*sin_kpol; |
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Dx = cos(Kazi)*sin_kpol; |
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Dy = sin(Kazi)*sin_kpol; |
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Dz = sqrt(1 - sin_kpol*sin_kpol); |
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KprojOmega = PI * if(Kbin-.5, |
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(sq(cos(Kpola(Krow-1)*DEGREE)) - sq(cos(Kpola(Krow)*DEGREE)))/Knaz(Krow), |
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1 - sq(cos(Kpola(1)*DEGREE))); |
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'; |
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# Compute Klems bin from exiting ray direction |
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# Compute Klems bin from exiting ray direction (forward or backward) |
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my $kcal = ' |
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DEGREE : PI/180; |
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abs(x) : if(x, x, -x); |
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Acos(x) : 1/DEGREE * if(x-1, 0, if(-1-x, 0, acos(x))); |
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posangle(a) : if(-a, a + 2*PI, a); |
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Atan2(y,x) : 1/DEGREE * posangle(atan2(y,x)); |
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kaccum(7) + kazn(azi,360/knaz(8)), |
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kaccum(8) + kazn(azi,360/knaz(9)) |
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); |
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kbin = kbin2(Acos(Dz), Atan2(Dy, -Dx)); |
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kbin = kbin2(Acos(abs(Dz)),Atan2(Dy,Dx)); |
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'; |
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my $ndiv = 145; |
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my $nx = int(sqrt($nsamp*($dim[1]-$dim[0])/($dim[3]-$dim[2])) + .5); |
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my $ny = int($nsamp/$nx + .5); |
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$nsamp = $nx * $ny; |
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# Compute scattering data using rtcontrib |
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my @tfarr; |
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my @rfarr; |
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my @tbarr; |
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my @rbarr; |
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my $cmd; |
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my $rtcmd = "rtcontrib -h -ff -fo -n $nproc -c $nsamp " . |
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"-e '$kcal' -b kbin -bn $ndiv " . |
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"-o '$td/%s.flt' -m $fmodnm -m $bmodnm $rtargs $octree"; |
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my $rccmd = "rcalc -e '$tcal' " . |
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"-e 'mod(n,d):n-floor(n/d)*d' -e 'Kbin=mod(recno-.999,$ndiv)' " . |
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q{-if3 -e '$1=(0.265*$1+0.670*$2+0.065*$3)/KprojOmega'}; |
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if ( $doforw ) { |
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$cmd = "cnt $ndiv $ny $nx | rcalc -of -e '$tcal' " . |
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"-e 'xp=(\$3+rand(.12*recno+288))*(($dim[1]-$dim[0])/$nx)+$dim[0]' " . |
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"-e 'yp=(\$2+rand(.37*recno-44))*(($dim[3]-$dim[2])/$ny)+$dim[2]' " . |
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"-e 'zp:$dim[4]' " . |
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q{-e 'Kbin=$1;x1=rand(2.75*recno+3.1);x2=rand(-2.01*recno-3.37)' } . |
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q{-e '$1=xp-Dx;$2=yp-Dy;$3=zp-Dz;$4=Dx;$5=Dy;$6=Dz' } . |
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"| $rtcmd"; |
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system "$cmd" || die "Failure running: $cmd\n"; |
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@tfarr = `$rccmd $td/$fmodnm.flt`; |
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die "Failure running: $rccmd $td/$fmodnm.flt\n" if ( $? ); |
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@rfarr = `$rccmd $td/$bmodnm.flt`; |
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die "Failure running: $rccmd $td/$bmodnm.flt\n" if ( $? ); |
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} |
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if ( $doback ) { |
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$cmd = "cnt $ndiv $ny $nx | rcalc -of -e '$tcal' " . |
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"-e 'xp=(\$3+rand(.35*recno-15))*(($dim[1]-$dim[0])/$nx)+$dim[0]' " . |
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"-e 'yp=(\$2+rand(.86*recno+11))*(($dim[3]-$dim[2])/$ny)+$dim[2]' " . |
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"-e 'zp:$dim[5]' " . |
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q{-e 'Kbin=$1;x1=rand(1.21*recno+2.75);x2=rand(-3.55*recno-7.57)' } . |
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q{-e '$1=xp-Dx;$2=yp-Dy;$3=zp+Dz;$4=Dx;$5=Dy;$6=-Dz' } . |
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"| $rtcmd"; |
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system "$cmd" || die "Failure running: $cmd\n"; |
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@tbarr = `$rccmd $td/$bmodnm.flt`; |
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die "Failure running: $rccmd $td/$bmodnm.flt\n" if ( $? ); |
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@rbarr = `$rccmd $td/$fmodnm.flt`; |
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die "Failure running: $rccmd $td/$fmodnm.flt\n" if ( $? ); |
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} |
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# Output XML prologue |
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print |
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'<?xml version="1.0" encoding="UTF-8"?> |
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</AngleBasisBlock> |
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</AngleBasis> |
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</DataDefinition> |
279 |
< |
<WavelengthData> |
279 |
> |
'; |
280 |
> |
if ( $doforw ) { |
281 |
> |
print ' <WavelengthData> |
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<LayerNumber>System</LayerNumber> |
283 |
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<Wavelength unit="Integral">Visible</Wavelength> |
284 |
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<SourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum> |
290 |
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<ScatteringDataType>BTDF</ScatteringDataType> |
291 |
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<ScatteringData> |
292 |
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'; |
293 |
< |
# Compute actual scattering data using rtcontrib |
294 |
< |
system "cnt $ndiv $ny $nx | rcalc -of -e '$tcal' " . |
295 |
< |
"-e 'xp=(\$3+rand(.35*recno-15))*(($dim[1]-$dim[0])/$nx)+$dim[0]' " . |
296 |
< |
"-e 'yp=(\$2+rand(.86*recno+11))*(($dim[3]-$dim[2])/$ny)+$dim[2]' " . |
297 |
< |
"-e 'zp:$dim[4]-1e-5' " . |
298 |
< |
q{-e 'Kbin=$1;x1=rand(1.21*recno+2.75);x2=rand(-3.55*recno-7.57)' } . |
299 |
< |
q{-e '$1=xp;$2=yp;$3=zp;$4=Dx;$5=Dy;$6=Dz' } . |
242 |
< |
"| rtcontrib -h -ff -n $nproc -c $nsamp -e '$kcal' -b kbin -bn $ndiv " . |
243 |
< |
"-m $modnm -w -ab 4 -lw 1e-5 $octree " . |
244 |
< |
q{| rcalc -if3 -e '$1=0.265*$1+0.670*$2+0.065*$3'}; |
245 |
< |
# Output XML epilogue |
293 |
> |
# Output front transmission (transposed order) |
294 |
> |
for (my $od = 0; $od < $ndiv; $od++) { |
295 |
> |
for (my $id = 0; $id < $ndiv; $id++) { |
296 |
> |
print $tfarr[$ndiv*$id + $od]; |
297 |
> |
} |
298 |
> |
print "\n"; |
299 |
> |
} |
300 |
|
print |
301 |
|
' </ScatteringData> |
302 |
|
</WavelengthDataBlock> |
303 |
|
</WavelengthData> |
304 |
< |
</Layer> |
304 |
> |
<WavelengthData> |
305 |
> |
<LayerNumber>System</LayerNumber> |
306 |
> |
<Wavelength unit="Integral">Visible</Wavelength> |
307 |
> |
<SourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum> |
308 |
> |
<DetectorSpectrum>ASTM E308 1931 Y.dsp</DetectorSpectrum> |
309 |
> |
<WavelengthDataBlock> |
310 |
> |
<WavelengthDataDirection>Reflection Front</WavelengthDataDirection> |
311 |
> |
<ColumnAngleBasis>LBNL/Klems Full</ColumnAngleBasis> |
312 |
> |
<RowAngleBasis>LBNL/Klems Full</RowAngleBasis> |
313 |
> |
<ScatteringDataType>BRDF</ScatteringDataType> |
314 |
> |
<ScatteringData> |
315 |
> |
'; |
316 |
> |
# Output front reflection (transposed order) |
317 |
> |
for (my $od = 0; $od < $ndiv; $od++) { |
318 |
> |
for (my $id = 0; $id < $ndiv; $id++) { |
319 |
> |
print $rfarr[$ndiv*$id + $od]; |
320 |
> |
} |
321 |
> |
print "\n"; |
322 |
> |
} |
323 |
> |
print |
324 |
> |
' </ScatteringData> |
325 |
> |
</WavelengthDataBlock> |
326 |
> |
</WavelengthData> |
327 |
> |
'; |
328 |
> |
} |
329 |
> |
if ( $doback ) { |
330 |
> |
print ' <WavelengthData> |
331 |
> |
<LayerNumber>System</LayerNumber> |
332 |
> |
<Wavelength unit="Integral">Visible</Wavelength> |
333 |
> |
<SourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum> |
334 |
> |
<DetectorSpectrum>ASTM E308 1931 Y.dsp</DetectorSpectrum> |
335 |
> |
<WavelengthDataBlock> |
336 |
> |
<WavelengthDataDirection>Transmission Back</WavelengthDataDirection> |
337 |
> |
<ColumnAngleBasis>LBNL/Klems Full</ColumnAngleBasis> |
338 |
> |
<RowAngleBasis>LBNL/Klems Full</RowAngleBasis> |
339 |
> |
<ScatteringDataType>BTDF</ScatteringDataType> |
340 |
> |
<ScatteringData> |
341 |
> |
'; |
342 |
> |
# Output back transmission (transposed order) |
343 |
> |
for (my $od = 0; $od < $ndiv; $od++) { |
344 |
> |
for (my $id = 0; $id < $ndiv; $id++) { |
345 |
> |
print $tbarr[$ndiv*$id + $od]; |
346 |
> |
} |
347 |
> |
print "\n"; |
348 |
> |
} |
349 |
> |
print |
350 |
> |
' </ScatteringData> |
351 |
> |
</WavelengthDataBlock> |
352 |
> |
</WavelengthData> |
353 |
> |
<WavelengthData> |
354 |
> |
<LayerNumber>System</LayerNumber> |
355 |
> |
<Wavelength unit="Integral">Visible</Wavelength> |
356 |
> |
<SourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum> |
357 |
> |
<DetectorSpectrum>ASTM E308 1931 Y.dsp</DetectorSpectrum> |
358 |
> |
<WavelengthDataBlock> |
359 |
> |
<WavelengthDataDirection>Reflection Back</WavelengthDataDirection> |
360 |
> |
<ColumnAngleBasis>LBNL/Klems Full</ColumnAngleBasis> |
361 |
> |
<RowAngleBasis>LBNL/Klems Full</RowAngleBasis> |
362 |
> |
<ScatteringDataType>BRDF</ScatteringDataType> |
363 |
> |
<ScatteringData> |
364 |
> |
'; |
365 |
> |
# Output back reflection (transposed order) |
366 |
> |
for (my $od = 0; $od < $ndiv; $od++) { |
367 |
> |
for (my $id = 0; $id < $ndiv; $id++) { |
368 |
> |
print $rbarr[$ndiv*$id + $od]; |
369 |
> |
} |
370 |
> |
print "\n"; |
371 |
> |
} |
372 |
> |
print |
373 |
> |
' </ScatteringData> |
374 |
> |
</WavelengthDataBlock> |
375 |
> |
</WavelengthData> |
376 |
> |
'; |
377 |
> |
} |
378 |
> |
# Output XML epilogue |
379 |
> |
print '</Layer> |
380 |
|
</Optical> |
381 |
|
</WindowElement> |
382 |
|
'; |