--- ray/src/util/genBSDF.pl 2011/01/27 22:28:12 2.7 +++ ray/src/util/genBSDF.pl 2014/07/09 15:03:11 2.48 @@ -1,28 +1,74 @@ #!/usr/bin/perl -w -# RCSid $Id: genBSDF.pl,v 2.7 2011/01/27 22:28:12 greg Exp $ +# RCSid $Id: genBSDF.pl,v 2.48 2014/07/09 15:03:11 greg Exp $ # # Compute BSDF based on geometry and material description # # G. Ward # use strict; +my $windoz = ($^O eq "MSWin32" or $^O eq "MSWin64"); +use File::Temp qw/ :mktemp /; sub userror { - print STDERR "Usage: genBSDF [-n Nproc][-c Nsamp][-dim xmin xmax ymin ymax zmin zmax][{+|-}mgf][{+|-}geom] [input ..]\n"; + print STDERR "Usage: genBSDF [-n Nproc][-c Nsamp][-t{3|4} Nlog2][-r \"ropts\"][-dim xmin xmax ymin ymax zmin zmax][{+|-}f][{+|-}b][{+|-}mgf][{+|-}geom units] [input ..]\n"; exit 1; } -my $td = `mktemp -d /tmp/genBSDF.XXXXXX`; -chomp $td; -my $nsamp = 1000; +my ($td,$radscn,$mgfscn,$octree,$cnttmp,$rmtmp); +if ($windoz) { + my $tmploc = `echo \%TMP\%`; + chomp($tmploc); + $td = mkdtemp("$tmploc\\genBSDF.XXXXXX"); + $radscn = "$td\\device.rad"; + $mgfscn = "$td\\device.mgf"; + $octree = "$td\\device.oct"; + chomp $td; + $rmtmp = "rmdir /S /Q $td"; +} else{ + $td = mkdtemp("/tmp/genBSDF.XXXXXX"); + chomp $td; + $radscn = "$td/device.rad"; + $mgfscn = "$td/device.mgf"; + $octree = "$td/device.oct"; + $rmtmp = "rm -rf $td"; +} +my @savedARGV = @ARGV; +my $tensortree = 0; +my $ttlog2 = 4; +my $nsamp = 2000; +my $rtargs = "-w -ab 5 -ad 700 -lw 3e-6"; my $mgfin = 0; my $geout = 1; my $nproc = 1; +my $doforw = 0; +my $doback = 1; +my $pctcull = 90; +my $gunit = "meter"; my @dim; # Get options while ($#ARGV >= 0) { if ("$ARGV[0]" =~ /^[-+]m/) { $mgfin = ("$ARGV[0]" =~ /^\+/); + } elsif ("$ARGV[0]" eq "-r") { + $rtargs = "$rtargs $ARGV[1]"; + shift @ARGV; } elsif ("$ARGV[0]" =~ /^[-+]g/) { $geout = ("$ARGV[0]" =~ /^\+/); + $gunit = $ARGV[1]; + if ($gunit !~ /^(?i)(meter|foot|inch|centimeter|millimeter)$/) { + die "Illegal geometry unit '$gunit': must be meter, foot, inch, centimeter, or millimeter\n"; + } + shift @ARGV; + } elsif ("$ARGV[0]" =~ /^[-+]f/) { + $doforw = ("$ARGV[0]" =~ /^\+/); + } elsif ("$ARGV[0]" =~ /^[-+]b/) { + $doback = ("$ARGV[0]" =~ /^\+/); + } elsif ("$ARGV[0]" eq "-t") { + # Use value < 0 for rttree_reduce bypass + $pctcull = $ARGV[1]; + shift @ARGV; + } elsif ("$ARGV[0]" =~ /^-t[34]$/) { + $tensortree = substr($ARGV[0], 2, 1); + $ttlog2 = $ARGV[1]; + shift @ARGV; } elsif ("$ARGV[0]" eq "-c") { $nsamp = $ARGV[1]; shift @ARGV; @@ -31,7 +77,7 @@ while ($#ARGV >= 0) { shift @ARGV; } elsif ("$ARGV[0]" =~ /^-d/) { userror() if ($#ARGV < 6); - @dim = "@ARGV[1..6]"; + @dim = @ARGV[1..6]; shift @ARGV for (1..6); } elsif ("$ARGV[0]" =~ /^[-+]./) { userror(); @@ -40,16 +86,19 @@ while ($#ARGV >= 0) { } shift @ARGV; } +# Check that we're actually being asked to do something +die "Must have at least one of +forward or +backward\n" if (!$doforw && !$doback); +# Issue warning for unhandled reciprocity case +print STDERR "Warning: recommend both +forward and +backward with -t3" if + ($tensortree==3 && !($doforw && $doback)); # Get scene description and dimensions -my $radscn = "$td/device.rad"; -my $mgfscn = "$td/device.mgf"; -my $octree = "$td/device.oct"; + if ( $mgfin ) { - system "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"; + 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}; die "Could not load MGF input\n" if ( $? ); system "mgf2rad $mgfscn > $radscn"; } else { - system "cat @ARGV | xform -e > $radscn"; + system "xform -e @ARGV > $radscn"; die "Could not load Radiance input\n" if ( $? ); system "rad2mgf $radscn > $mgfscn" if ( $geout ); } @@ -57,187 +106,539 @@ if ($#dim != 5) { @dim = split ' ', `getbbox -h $radscn`; } print STDERR "Warning: Device extends into room\n" if ($dim[5] > 1e-5); -# Add receiver surface (rectangle) -my $modnm="_receiver_black_"; +# Add receiver surfaces (rectangular) +my $fmodnm="receiver_face"; +my $bmodnm="receiver_behind"; open(RADSCN, ">> $radscn"); -print RADSCN "void glow $modnm\n0\n0\n4 0 0 0 0\n\n"; -print RADSCN "$modnm polygon _receiver_\n0\n0\n12\n"; -print RADSCN "\t",$dim[0],"\t",$dim[2],"\t",$dim[5]+1e-5,"\n"; -print RADSCN "\t",$dim[0],"\t",$dim[3],"\t",$dim[5]+1e-5,"\n"; -print RADSCN "\t",$dim[1],"\t",$dim[3],"\t",$dim[5]+1e-5,"\n"; -print RADSCN "\t",$dim[1],"\t",$dim[2],"\t",$dim[5]+1e-5,"\n"; +print RADSCN "void glow $fmodnm\n0\n0\n4 1 1 1 0\n\n"; +print RADSCN "$fmodnm source f_receiver\n0\n0\n4 0 0 1 180\n"; +print RADSCN "void glow $bmodnm\n0\n0\n4 1 1 1 0\n\n"; +print RADSCN "$bmodnm source b_receiver\n0\n0\n4 0 0 -1 180\n"; close RADSCN; # Generate octree system "oconv -w $radscn > $octree"; die "Could not compile scene\n" if ( $? ); -# Set up sampling -# Kbin to produce incident direction in full Klems basis with (x1,x2) randoms -my $tcal = ' -DEGREE : PI/180; -sq(x) : x*x; -Kpola(r) : select(r+1, -5, 5, 15, 25, 35, 45, 55, 65, 75, 90); -Knaz(r) : select(r, 1, 8, 16, 20, 24, 24, 24, 16, 12); -Kaccum(r) : if(r-.5, Knaz(r) + Kaccum(r-1), 0); -Kmax : Kaccum(Knaz(0)); -Kfindrow(r, rem) : if(rem-Knaz(r)+.5, Kfindrow(r+1, rem-Knaz(r)), r); -Krow = if(Kbin-(Kmax-.5), 0, Kfindrow(1, Kbin)); -Kcol = Kbin - Kaccum(Krow-1); -Kazi = 360*DEGREE * (Kcol + (.5 - x2)) / Knaz(Krow); -Kpol = DEGREE * (x1*Kpola(Krow) + (1-x1)*Kpola(Krow-1)); -sin_kpol = sin(Kpol); -Dx = -cos(Kazi)*sin_kpol; -Dy = sin(Kazi)*sin_kpol; -Dz = sqrt(1 - sin_kpol*sin_kpol); -KprojOmega = PI * if(Kbin-.5, - (sq(cos(Kpola(Krow-1)*DEGREE)) - sq(cos(Kpola(Krow)*DEGREE)))/Knaz(Krow), - 1 - sq(cos(Kpola(1)*DEGREE))); -'; -# Compute Klems bin from exiting ray direction -my $kcal = ' -DEGREE : PI/180; -Acos(x) : 1/DEGREE * if(x-1, 0, if(-1-x, 0, acos(x))); -posangle(a) : if(-a, a + 2*PI, a); -Atan2(y,x) : 1/DEGREE * posangle(atan2(y,x)); -kpola(r) : select(r, 5, 15, 25, 35, 45, 55, 65, 75, 90); -knaz(r) : select(r, 1, 8, 16, 20, 24, 24, 24, 16, 12); -kaccum(r) : if(r-.5, knaz(r) + kaccum(r-1), 0); -kfindrow(r, pol) : if(r-kpola(0)+.5, r, - if(pol-kpola(r), kfindrow(r+1, pol), r) ); -kazn(azi,inc) : if((360-.5*inc)-azi, floor((azi+.5*inc)/inc), 0); -kbin2(pol,azi) = select(kfindrow(1, pol), - kazn(azi,360/knaz(1)), - kaccum(1) + kazn(azi,360/knaz(2)), - kaccum(2) + kazn(azi,360/knaz(3)), - kaccum(3) + kazn(azi,360/knaz(4)), - kaccum(4) + kazn(azi,360/knaz(5)), - kaccum(5) + kazn(azi,360/knaz(6)), - kaccum(6) + kazn(azi,360/knaz(7)), - kaccum(7) + kazn(azi,360/knaz(8)), - kaccum(8) + kazn(azi,360/knaz(9)) - ); -kbin = kbin2(Acos(Dz), Atan2(Dy, -Dx)); -'; -my $ndiv = 145; -my $nx = int(sqrt($nsamp*($dim[1]-$dim[0])/($dim[3]-$dim[2])) + .5); -my $ny = int($nsamp/$nx + .5); -$nsamp = $nx * $ny; -# Compute scattering data using rtcontrib -my $cmd = "cnt $ndiv $ny $nx | rcalc -of -e '$tcal' " . - "-e 'xp=(\$3+rand(.35*recno-15))*(($dim[1]-$dim[0])/$nx)+$dim[0]' " . - "-e 'yp=(\$2+rand(.86*recno+11))*(($dim[3]-$dim[2])/$ny)+$dim[2]' " . - "-e 'zp:$dim[4]-1e-5' " . - q{-e 'Kbin=$1;x1=rand(1.21*recno+2.75);x2=rand(-3.55*recno-7.57)' } . - q{-e '$1=xp;$2=yp;$3=zp;$4=Dx;$5=Dy;$6=Dz' } . - "| rtcontrib -h -ff -n $nproc -c $nsamp -e '$kcal' -b kbin -bn $ndiv " . - "-m $modnm -w -ab 5 -ad 700 -lw 3e-6 $octree " . - "| rcalc -e '$tcal' " . - "-e 'mod(n,d):n-floor(n/d)*d' -e 'Kbin=mod(recno-.999,$ndiv)' " . - q{-if3 -e '$1=(0.265*$1+0.670*$2+0.065*$3)/KprojOmega'}; -my @darr = `$cmd`; -die "Failure running: $cmd\n" if ( $? ); # Output XML prologue print ' - System - - - - Name - Manufacturer '; -printf "\t\t\t%.3f\n", $dim[5] - $dim[4]; -printf "\t\t\t%.3f\n", $dim[1] - $dim[0]; -printf "\t\t\t%.3f\n", $dim[3] - $dim[2]; -print "\t\t\tIntegral\n"; +print "\n"; +print +'System +BSDF + + + + Name + Manufacturer +'; +printf qq{\t\t%.6f\n}, $dim[5] - $dim[4]; +printf qq{\t\t%.6f\n}, $dim[1] - $dim[0]; +printf qq{\t\t%.6f\n}, $dim[3] - $dim[2]; +print "\t\tOther\n"; +print "\t\n"; # Output MGF description if requested if ( $geout ) { - print "\t\t\t\n"; + print qq{\t\t\n}; + print qq{\t\t\n}; printf "xf -t %.6f %.6f 0\n", -($dim[0]+$dim[1])/2, -($dim[2]+$dim[3])/2; - system "cat $mgfscn"; + open(MGFSCN, "< $mgfscn"); + while () { print $_; } + close MGFSCN; print "xf\n"; - print "\t\t\t\n"; + print "\n"; + print "\t\n"; } -print ' - - Columns - +# Set up surface sampling +my $nx = int(sqrt($nsamp*($dim[1]-$dim[0])/($dim[3]-$dim[2])) + 1); +my $ny = int($nsamp/$nx + 1); +$nsamp = $nx * $ny; +my $ns = 2**$ttlog2; +my (@pdiv, $disk2sq, $sq2disk, $tcal, $kcal); +# Create data segments (all the work happens here) +if ( $tensortree ) { + do_tree_bsdf(); +} else { + do_matrix_bsdf(); +} +# Output XML epilogue +print +' + + +'; +# Clean up temporary files and exit +system $rmtmp; + +#-------------- End of main program segment --------------# + +#++++++++++++++ Tensor tree BSDF generation ++++++++++++++# +sub do_tree_bsdf { +# Shirley-Chiu mapping from unit square to disk +$sq2disk = 'in_square_a = 2*in_square_x - 1; ' . + 'in_square_b = 2*in_square_y - 1; ' . + 'in_square_rgn = if(in_square_a + in_square_b, ' . + 'if(in_square_a - in_square_b, 1, 2), ' . + 'if(in_square_b - in_square_a, 3, 4)); ' . + 'out_disk_r = .999995*select(in_square_rgn, in_square_a, in_square_b, ' . + '-in_square_a, -in_square_b); ' . + 'out_disk_phi = PI/4 * select(in_square_rgn, ' . + 'in_square_b/in_square_a, ' . + '2 - in_square_a/in_square_b, ' . + '4 + in_square_b/in_square_a, ' . + 'if(in_square_b*in_square_b, ' . + '6 - in_square_a/in_square_b, 0)); ' . + 'Dx = out_disk_r*cos(out_disk_phi); ' . + 'Dy = out_disk_r*sin(out_disk_phi); ' . + 'Dz = sqrt(1 - out_disk_r*out_disk_r);' ; +# Shirley-Chiu mapping from unit disk to square +$disk2sq = 'norm_radians(p) : if(-p - PI/4, p + 2*PI, p); ' . + 'in_disk_r = .999995*sqrt(Dx*Dx + Dy*Dy); ' . + 'in_disk_phi = norm_radians(atan2(Dy, Dx)); ' . + 'in_disk_rgn = floor((.999995*in_disk_phi + PI/4)/(PI/2)) + 1; ' . + 'out_square_a = select(in_disk_rgn, ' . + 'in_disk_r, ' . + '(PI/2 - in_disk_phi)*in_disk_r/(PI/4), ' . + '-in_disk_r, ' . + '(in_disk_phi - 3*PI/2)*in_disk_r/(PI/4)); ' . + 'out_square_b = select(in_disk_rgn, ' . + 'in_disk_phi*in_disk_r/(PI/4), ' . + 'in_disk_r, ' . + '(PI - in_disk_phi)*in_disk_r/(PI/4), ' . + '-in_disk_r); ' . + 'out_square_x = (out_square_a + 1)/2; ' . + 'out_square_y = (out_square_b + 1)/2;'; +# Announce ourselves in XML output +print "\t\n"; +print "\t\tTensorTree$tensortree\n"; +print "\t\n"; + +# Start rcontrib processes for compute each side +do_tree_rtcontrib(0) if ( $doback ); +do_tree_rtcontrib(1) if ( $doforw ); + +} # end of sub do_tree_bsdf() + +# Run rcontrib process to generate tensor tree samples +sub do_tree_rtcontrib { + my $forw = shift; + my $cmd; + my $matargs = "-m $bmodnm"; + if ( !$forw || !$doback || $tensortree==3 ) { $matargs .= " -m $fmodnm"; } + if ($windoz) { + $cmd = "rcontrib $rtargs -h -faa -fo -n $nproc -c $nsamp " . + qq{-e "$disk2sq" -bn "$ns*$ns" } . + qq{-b "$ns*floor(out_square_x*$ns)+floor(out_square_y*$ns)" } . + "-o $td/%s.flt $matargs $octree"; + } else { + $cmd = "rcontrib $rtargs -h -fff -fo -n $nproc -c $nsamp " . + qq{-e "$disk2sq" -bn "$ns*$ns" } . + qq{-b "$ns*floor(out_square_x*$ns)+floor(out_square_y*$ns)" } . + "-o $td/%s.flt $matargs $octree"; + } + if ( $tensortree == 3 ) { + # Isotropic BSDF + my $ns2 = $ns / 2; + if ($windoz) { + $cmd = "cnt $ns2 $ny $nx " . + qq{| rcalc -e "r1=rand(.8681*recno-.673892)" } . + qq{-e "r2=rand(-5.37138*recno+67.1737811)" } . + qq{-e "r3=rand(+3.17603772*recno+83.766771)" } . + qq{-e "Dx=1-2*(\$1+r1)/$ns;Dy:0;Dz=sqrt(1-Dx*Dx)" } . + qq{-e "xp=(\$3+r2)*(($dim[1]-$dim[0])/$nx)+$dim[0]" } . + qq{-e "yp=(\$2+r3)*(($dim[3]-$dim[2])/$ny)+$dim[2]" } . + qq{-e "zp=$dim[5-$forw]" -e "myDz=Dz*($forw*2-1)" } . + qq{-e "\$1=xp-Dx;\$2=yp-Dy;\$3=zp-myDz" } . + qq{-e "\$4=Dx;\$5=Dy;\$6=myDz" } . + "| $cmd"; + } else { + $cmd = "cnt $ns2 $ny $nx " . + qq{| rcalc -e "r1=rand(.8681*recno-.673892)" } . + qq{-e "r2=rand(-5.37138*recno+67.1737811)" } . + qq{-e "r3=rand(+3.17603772*recno+83.766771)" } . + qq{-e "Dx=1-2*(\$1+r1)/$ns;Dy:0;Dz=sqrt(1-Dx*Dx)" } . + qq{-e "xp=(\$3+r2)*(($dim[1]-$dim[0])/$nx)+$dim[0]" } . + qq{-e "yp=(\$2+r3)*(($dim[3]-$dim[2])/$ny)+$dim[2]" } . + qq{-e "zp=$dim[5-$forw]" -e "myDz=Dz*($forw*2-1)" } . + qq{-e '\$1=xp-Dx;\$2=yp-Dy;\$3=zp-myDz' } . + qq{-e '\$4=Dx;\$5=Dy;\$6=myDz' -of } . + "| $cmd"; + } + } else { + # Anisotropic BSDF + # Sample area vertically to improve load balance, since + # shading systems usually have bilateral symmetry (L-R) + if ($windoz) { + $cmd = "cnt $ns $ns $ny $nx " . + qq{| rcalc -e "r1=rand(.8681*recno-.673892)" } . + qq{-e "r2=rand(-5.37138*recno+67.1737811)" } . + qq{-e "r3=rand(3.17603772*recno+83.766771)" } . + qq{-e "r4=rand(-2.3857833*recno-964.72738)" } . + qq{-e "in_square_x=(\$1+r1)/$ns" } . + qq{-e "in_square_y=(\$2+r2)/$ns" -e "$sq2disk" } . + qq{-e "xp=(\$4+r3)*(($dim[1]-$dim[0])/$nx)+$dim[0]" } . + qq{-e "yp=(\$3+r4)*(($dim[3]-$dim[2])/$ny)+$dim[2]" } . + qq{-e "zp=$dim[5-$forw]" -e "myDz=Dz*($forw*2-1)" } . + qq{-e "\$1=xp-Dx;\$2=yp-Dy;\$3=zp-myDz" } . + qq{-e "\$4=Dx;\$5=Dy;\$6=myDz" } . + "| $cmd"; + } else { + $cmd = "cnt $ns $ns $ny $nx " . + qq{| rcalc -e "r1=rand(.8681*recno-.673892)" } . + qq{-e "r2=rand(-5.37138*recno+67.1737811)" } . + qq{-e "r3=rand(3.17603772*recno+83.766771)" } . + qq{-e "r4=rand(-2.3857833*recno-964.72738)" } . + qq{-e "in_square_x=(\$1+r1)/$ns" } . + qq{-e "in_square_y=(\$2+r2)/$ns" -e "$sq2disk" } . + qq{-e "xp=(\$4+r3)*(($dim[1]-$dim[0])/$nx)+$dim[0]" } . + qq{-e "yp=(\$3+r4)*(($dim[3]-$dim[2])/$ny)+$dim[2]" } . + qq{-e "zp=$dim[5-$forw]" -e "myDz=Dz*($forw*2-1)" } . + qq{-e '\$1=xp-Dx;\$2=yp-Dy;\$3=zp-myDz' } . + qq{-e '\$4=Dx;\$5=Dy;\$6=myDz' -of } . + "| $cmd"; + } + } +# print STDERR "Starting: $cmd\n"; + system "$cmd" || die "Failure running rcontrib"; + ttree_out($forw); +} # end of do_tree_rtcontrib() + +# Simplify and output tensor tree results +sub ttree_out { + my $forw = shift; + my $side = ("Back","Front")[$forw]; + my $cmd; +# Only output one transmitted anisotropic distribution, preferring backwards +if ( !$forw || !$doback || $tensortree==3 ) { +print +' + System + Visible + CIE Illuminant D65 1nm.ssp + ASTM E308 1931 Y.dsp + ' ; +print "\t\t\tTransmission $side\n"; +print +' LBNL/Shirley-Chiu + BTDF + +'; +if ($windoz) { + $cmd = qq{rcalc -e "Omega:PI/($ns*$ns)" } . + q{-e "$1=(0.265*$1+0.670*$2+0.065*$3)/Omega" }; +} else { + $cmd = "rcalc -if3 -e 'Omega:PI/($ns*$ns)' " . + q{-e '$1=(0.265*$1+0.670*$2+0.065*$3)/Omega' }; +} +if ($pctcull >= 0) { + if ($windoz) { + $cmd = "rcollate -h -oc 1 $td/" . ($bmodnm,$fmodnm)[$forw] . ".flt | " . + $cmd . + "| rttree_reduce -h -fa -t $pctcull -r $tensortree -g $ttlog2"; + } else { + $cmd .= "-of $td/" . ($bmodnm,$fmodnm)[$forw] . ".flt " . + " | rttree_reduce -h -ff -t $pctcull -r $tensortree -g $ttlog2"; + } + system "$cmd" || die "Failure running rttree_reduce"; +} else { + if ($windoz) { + $cmd = "rcollate -h -oc 1 $td/" . ($bmodnm,$fmodnm)[$forw] . ".flt | " . + $cmd ; + } else { + $cmd .= "$td/" . ($bmodnm,$fmodnm)[$forw] . ".flt"; + } + print "{\n"; + system "$cmd" || die "Failure running rcalc"; + for (my $i = ($tensortree==3)*$ns*$ns*$ns/2; $i-- > 0; ) { + print "0\n"; + } + print "}\n"; +} +print +' + + +'; +} +# Output reflection +print +' + System + Visible + CIE Illuminant D65 1nm.ssp + ASTM E308 1931 Y.dsp + +'; +print "\t\t\tReflection $side\n"; +print +' LBNL/Shirley-Chiu + BTDF + +'; +if ($windoz) { + $cmd = qq{rcalc -e "Omega:PI/($ns*$ns)" } . + q{-e "$1=(0.265*$1+0.670*$2+0.065*$3)/Omega" }; +}else { + $cmd = "rcalc -if3 -e 'Omega:PI/($ns*$ns)' " . + q{-e '$1=(0.265*$1+0.670*$2+0.065*$3)/Omega' }; +} +if ($pctcull >= 0) { + if ($windoz) { + $cmd = "rcollate -h -oc 1 $td/" . ($fmodnm,$bmodnm)[$forw] . ".flt |" . + $cmd . + " | rttree_reduce -a -h -fa -t $pctcull -r $tensortree -g $ttlog2"; + + } else { + $cmd .= "-of $td/" . ($fmodnm,$bmodnm)[$forw] . ".flt " . + "| rttree_reduce -a -h -ff -t $pctcull -r $tensortree -g $ttlog2"; + } + system "$cmd" || die "Failure running rttree_reduce"; +} else { + if ($windoz) { + $cmd = "rcollate -h -oc 1 $td/" . ($fmodnm,$bmodnm)[$forw] . ".flt |" . + $cmd ; + } else { + $cmd .= "$td/" . ($fmodnm,$bmodnm)[$forw] . ".flt"; + } + print "{\n"; + system "$cmd" || die "Failure running rcalc"; + for (my $i = ($tensortree==3)*$ns*$ns*$ns/2; $i-- > 0; ) { + print "0\n"; + } + print "}\n"; +} +print +' + + +'; +} # end of ttree_out() + +#------------- End of do_tree_bsdf() & subroutines -------------# + +#+++++++++++++++ Klems matrix BSDF generation +++++++++++++++# +sub do_matrix_bsdf { +# Set up sampling of portal +# Kbin to produce incident direction in full Klems basis with (x1,x2) randoms +$tcal = 'DEGREE : PI/180; ' . + 'sq(x) : x*x; ' . + 'Kpola(r) : select(r+1, 0, 5, 15, 25, 35, 45, 55, 65, 75, 90); ' . + 'Knaz(r) : select(r, 1, 8, 16, 20, 24, 24, 24, 16, 12); ' . + 'Kaccum(r) : if(r-.5, Knaz(r) + Kaccum(r-1), 0); ' . + 'Kmax : Kaccum(Knaz(0)); ' . + 'Kfindrow(r, rem) : if(rem-Knaz(r)+.5, Kfindrow(r+1, rem-Knaz(r)), r); ' . + 'Krow = if(Kbin-(Kmax-.5), 0, Kfindrow(1, Kbin)); ' . + 'Kcol = Kbin - Kaccum(Krow-1); ' . + 'Kazi = 360*DEGREE * (Kcol + (.5 - x2)) / Knaz(Krow); ' . + 'Kpol = DEGREE * (x1*Kpola(Krow) + (1-x1)*Kpola(Krow-1)); ' . + 'sin_kpol = sin(Kpol); ' . + 'Dx = cos(Kazi)*sin_kpol; ' . + 'Dy = sin(Kazi)*sin_kpol; ' . + 'Dz = sqrt(1 - sin_kpol*sin_kpol); ' . + 'KprojOmega = PI * if(Kbin-.5, ' . + '(sq(cos(Kpola(Krow-1)*DEGREE)) - sq(cos(Kpola(Krow)*DEGREE)))/Knaz(Krow), ' . + '1 - sq(cos(Kpola(1)*DEGREE))); '; +# Compute Klems bin from exiting ray direction (forward or backward) +$kcal = 'DEGREE : PI/180; ' . + 'abs(x) : if(x, x, -x); ' . + 'Acos(x) : if(x-1, 0, if(-1-x, PI, acos(x)))/DEGREE; ' . + 'posangle(a) : if(-a, a + 2*PI, a); ' . + 'Atan2(y,x) : posangle(atan2(y,x))/DEGREE; ' . + 'kpola(r) : select(r, 5, 15, 25, 35, 45, 55, 65, 75, 90); ' . + 'knaz(r) : select(r, 1, 8, 16, 20, 24, 24, 24, 16, 12); ' . + 'kaccum(r) : if(r-.5, knaz(r) + kaccum(r-1), 0); ' . + 'kfindrow(r, pol) : if(r-kpola(0)+.5, r, ' . + 'if(pol-kpola(r), kfindrow(r+1, pol), r) ); ' . + 'kazn(azi,inc) : if((360-.5*inc)-azi, floor((azi+.5*inc)/inc), 0); ' . + 'kbin2(pol,azi) = select(kfindrow(1, pol), ' . + 'kazn(azi,360/knaz(1)), ' . + 'kaccum(1) + kazn(azi,360/knaz(2)), ' . + 'kaccum(2) + kazn(azi,360/knaz(3)), ' . + 'kaccum(3) + kazn(azi,360/knaz(4)), ' . + 'kaccum(4) + kazn(azi,360/knaz(5)), ' . + 'kaccum(5) + kazn(azi,360/knaz(6)), ' . + 'kaccum(6) + kazn(azi,360/knaz(7)), ' . + 'kaccum(7) + kazn(azi,360/knaz(8)), ' . + 'kaccum(8) + kazn(azi,360/knaz(9)) ' . + '); ' . + 'kbin = kbin2(Acos(abs(Dz)),Atan2(Dy,Dx));'; +my $ndiv = 145; +# Compute scattering data using rcontrib +my @tfarr; +my @rfarr; +my @tbarr; +my @rbarr; +my (@data,@line); # for windows +my $cmd; +my $rtcmd; +my $rccmd; +if ($windoz) { + $rtcmd = "rcontrib $rtargs -h -fo -n $nproc -c $nsamp " . + qq{-e "$kcal" -b kbin -bn $ndiv } . + qq{-o "$td\\%s.flt" -m $fmodnm -m $bmodnm $octree }; + $rccmd = qq{rcalc -e "$tcal" } . + qq{-e "mod(n,d):n-floor(n/d)*d" -e "Kbin=mod(recno-.999,$ndiv)" } . + q{ -e "$1=(0.265*$1+0.670*$2+0.065*$3)/KprojOmega" }; +} else { + $rtcmd = "rcontrib $rtargs -h -ff -fo -n $nproc -c $nsamp " . + "-e '$kcal' -b kbin -bn $ndiv " . + "-o '$td/%s.flt' -m $fmodnm -m $bmodnm $octree"; + $rccmd = "rcalc -e '$tcal' " . + "-e 'mod(n,d):n-floor(n/d)*d' -e 'Kbin=mod(recno-.999,$ndiv)' " . + q{-if3 -e '$1=(0.265*$1+0.670*$2+0.065*$3)/KprojOmega' }; +} +if ( $doforw ) { + if ($windoz) { + $cmd = qq{cnt $ndiv $ny $nx | rcalc -e "$tcal" } . + qq{-e "xp=(\$3+rand(.12*recno+288))*(($dim[1]-$dim[0])/$nx)+$dim[0]" } . + qq{-e "yp=(\$2+rand(.37*recno-44))*(($dim[3]-$dim[2])/$ny)+$dim[2]" } . + qq{-e "zp:$dim[4]" } . + q{-e "Kbin=$1;x1=rand(2.75*recno+3.1);x2=rand(-2.01*recno-3.37)" } . + q{-e "$1=xp-Dx;$2=yp-Dy;$3=zp-Dz;$4=Dx;$5=Dy;$6=Dz" } . + "| $rtcmd "; + } else { + $cmd = "cnt $ndiv $ny $nx | rcalc -of -e '$tcal' " . + "-e 'xp=(\$3+rand(.12*recno+288))*(($dim[1]-$dim[0])/$nx)+$dim[0]' " . + "-e 'yp=(\$2+rand(.37*recno-44))*(($dim[3]-$dim[2])/$ny)+$dim[2]' " . + "-e 'zp:$dim[4]' " . + q{-e 'Kbin=$1;x1=rand(2.75*recno+3.1);x2=rand(-2.01*recno-3.37)' } . + q{-e '$1=xp-Dx;$2=yp-Dy;$3=zp-Dz;$4=Dx;$5=Dy;$6=Dz' } . + "| $rtcmd"; + } +system "$cmd" || die "Failure running: $cmd\n"; +if ($windoz) { + @tfarr = `rcollate -h -oc 1 $td\\$fmodnm.flt | $rccmd`; +} else { + @tfarr = `$rccmd $td/$fmodnm.flt`; +} +die "Failure running: $rccmd $td/$fmodnm.flt\n" if ( $? ); +if ($windoz) { + @rfarr = `rcollate -h -oc 1 $td\\$bmodnm.flt | $rccmd`; +} else { + @rfarr = `$rccmd $td/$bmodnm.flt`; +} +die "Failure running: $rccmd $td/$bmodnm.flt\n" if ( $? ); +} +if ( $doback ) { + if ($windoz) { + $cmd = qq{cnt $ndiv $ny $nx | rcalc -e "$tcal" } . + qq{-e "xp=(\$3+rand(.35*recno-15))*(($dim[1]-$dim[0])/$nx)+$dim[0]" } . + qq{-e "yp=(\$2+rand(.86*recno+11))*(($dim[3]-$dim[2])/$ny)+$dim[2]" } . + qq{-e "zp:$dim[5]" } . + q{-e "Kbin=$1;x1=rand(1.21*recno+2.75);x2=rand(-3.55*recno-7.57)" } . + q{-e "$1=xp-Dx;$2=yp-Dy;$3=zp+Dz;$4=Dx;$5=Dy;$6=-Dz" } . + "| $rtcmd"; + } else { + $cmd = "cnt $ndiv $ny $nx | rcalc -of -e '$tcal' " . + "-e 'xp=(\$3+rand(.35*recno-15))*(($dim[1]-$dim[0])/$nx)+$dim[0]' " . + "-e 'yp=(\$2+rand(.86*recno+11))*(($dim[3]-$dim[2])/$ny)+$dim[2]' " . + "-e 'zp:$dim[5]' " . + q{-e 'Kbin=$1;x1=rand(1.21*recno+2.75);x2=rand(-3.55*recno-7.57)' } . + q{-e '$1=xp-Dx;$2=yp-Dy;$3=zp+Dz;$4=Dx;$5=Dy;$6=-Dz' } . + "| $rtcmd"; + } +system "$cmd" || die "Failure running: $cmd\n"; +if ($windoz) { + @tbarr = `rcollate -h -oc 1 $td\\$bmodnm.flt | $rccmd`; +} else { + @tbarr = `$rccmd $td/$bmodnm.flt`; +} +die "Failure running: $rccmd $td/$bmodnm.flt\n" if ( $? ); +chomp(@tbarr); +if ($windoz) { + @rbarr = `rcollate -h -oc 1 $td\\$fmodnm.flt | $rccmd`; +} else { + @rbarr = `$rccmd $td/$fmodnm.flt`; +} +die "Failure running: $rccmd $td/$fmodnm.flt\n" if ( $? ); +chomp(@rbarr); +} + +# Output angle basis +print +' + Columns + LBNL/Klems Full - - 0 - 1 - + + 0 + 1 + 0 5 - - - - 10 - 8 - - 5 - 15 - - - - 20 - 16 - - 15 - 25 - - - - 30 - 20 - - 25 - 35 - - - - 40 - 24 - - 35 - 45 - - - - 50 - 24 - - 45 - 55 - - - - 60 - 24 - - 55 - 65 - - - - 70 - 16 - - 65 - 75 - - - - 82.5 - 12 - - 75 - 90 - + + + 10 + 8 + + 5 + 15 + + + + 20 + 16 + + 15 + 25 + + + + 30 + 20 + + 25 + 35 + + + + 40 + 24 + + 35 + 45 + + + + 50 + 24 + + 45 + 55 + + + + 60 + 24 + + 55 + 65 + + + + 70 + 16 + + 65 + 75 + + + + 82.5 + 12 + + 75 + 90 + + - +'; +if ( $doforw ) { +print +' System Visible CIE Illuminant D65 1nm.ssp @@ -249,21 +650,95 @@ print ' BTDF '; -# Output computed data (transposed order) +# Output front transmission (transposed order) for (my $od = 0; $od < $ndiv; $od++) { for (my $id = 0; $id < $ndiv; $id++) { - print $darr[$ndiv*$id + $od]; + chomp $tfarr[$ndiv*$id + $od]; + print $tfarr[$ndiv*$id + $od], ",\t"; } print "\n"; } -# Output XML epilogue print -' - +' + - - - + + System + Visible + CIE Illuminant D65 1nm.ssp + ASTM E308 1931 Y.dsp + + Reflection Front + LBNL/Klems Full + LBNL/Klems Full + BTDF + '; -# Clean up temporary files -system "rm -rf $td"; +# Output front reflection (transposed order) +for (my $od = 0; $od < $ndiv; $od++) { + for (my $id = 0; $id < $ndiv; $id++) { + chomp $rfarr[$ndiv*$id + $od]; + print $rfarr[$ndiv*$id + $od], ",\t"; + } + print "\n"; +} +print +' + + +'; +} +if ( $doback ) { +print +' + System + Visible + CIE Illuminant D65 1nm.ssp + ASTM E308 1931 Y.dsp + + Transmission Back + LBNL/Klems Full + LBNL/Klems Full + BTDF + +'; +# Output back transmission (transposed order) +for (my $od = 0; $od < $ndiv; $od++) { + for (my $id = 0; $id < $ndiv; $id++) { + chomp $tbarr[$ndiv*$id + $od]; + print $tbarr[$ndiv*$id + $od], ",\t"; + } + print "\n"; +} +print +' + + + + System + Visible + CIE Illuminant D65 1nm.ssp + ASTM E308 1931 Y.dsp + + Reflection Back + LBNL/Klems Full + LBNL/Klems Full + BTDF + +'; +# Output back reflection (transposed order) +for (my $od = 0; $od < $ndiv; $od++) { + for (my $id = 0; $id < $ndiv; $id++) { + chomp $rbarr[$ndiv*$id + $od]; + print $rbarr[$ndiv*$id + $od], ",\t"; + } + print "\n"; +} +print +' + + +'; +} +} +#------------- End of do_matrix_bsdf() --------------#