| 1 |
#!/usr/bin/perl -w |
| 2 |
# RCSid $Id: genBSDF.pl,v 2.56 2015/04/01 01:38:35 greg Exp $ |
| 3 |
# |
| 4 |
# Compute BSDF based on geometry and material description |
| 5 |
# |
| 6 |
# G. Ward |
| 7 |
# |
| 8 |
use strict; |
| 9 |
my $windoz = ($^O eq "MSWin32" or $^O eq "MSWin64"); |
| 10 |
use File::Temp qw/ :mktemp /; |
| 11 |
sub userror { |
| 12 |
print STDERR "Usage: genBSDF [-n Nproc][-c Nsamp][-W][-t{3|4} Nlog2][-r \"ropts\"][-s \"x=string;y=string\"][-dim xmin xmax ymin ymax zmin zmax][{+|-}C][{+|-}f][{+|-}b][{+|-}mgf][{+|-}geom units] [input ..]\n"; |
| 13 |
exit 1; |
| 14 |
} |
| 15 |
my ($td,$radscn,$mgfscn,$octree,$fsender,$bsender,$receivers,$facedat,$behinddat,$rmtmp); |
| 16 |
my ($tf,$rf,$tb,$rb,$tfx,$rfx,$tbx,$rbx,$tfz,$rfz,$tbz,$rbz); |
| 17 |
if ($windoz) { |
| 18 |
my $tmploc = `echo \%TMP\%`; |
| 19 |
chomp($tmploc); |
| 20 |
$td = mkdtemp("$tmploc\\genBSDF.XXXXXX"); |
| 21 |
$radscn = "$td\\device.rad"; |
| 22 |
$mgfscn = "$td\\device.mgf"; |
| 23 |
$octree = "$td\\device.oct"; |
| 24 |
$fsender = "$td\\fsender.rad"; |
| 25 |
$bsender = "$td\\bsender.rad"; |
| 26 |
$receivers = "$td\\receivers.rad"; |
| 27 |
$facedat = "$td\\face.dat"; |
| 28 |
$behinddat = "$td\\behind.dat"; |
| 29 |
$tf = "$td\\tf.dat"; |
| 30 |
$rf = "$td\\rf.dat"; |
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$tb = "$td\\tb.dat"; |
| 32 |
$rb = "$td\\rb.dat"; |
| 33 |
$tfx = "$td\\tfx.dat"; |
| 34 |
$rfx = "$td\\rfx.dat"; |
| 35 |
$tbx = "$td\\tbx.dat"; |
| 36 |
$rbx = "$td\\rbx.dat"; |
| 37 |
$tfz = "$td\\tfz.dat"; |
| 38 |
$rfz = "$td\\rfz.dat"; |
| 39 |
$tbz = "$td\\tbz.dat"; |
| 40 |
$rbz = "$td\\rbz.dat"; |
| 41 |
chomp $td; |
| 42 |
$rmtmp = "rmdir /S /Q $td"; |
| 43 |
} else { |
| 44 |
$td = mkdtemp("/tmp/genBSDF.XXXXXX"); |
| 45 |
chomp $td; |
| 46 |
$radscn = "$td/device.rad"; |
| 47 |
$mgfscn = "$td/device.mgf"; |
| 48 |
$octree = "$td/device.oct"; |
| 49 |
$fsender = "$td/fsender.rad"; |
| 50 |
$bsender = "$td/bsender.rad"; |
| 51 |
$receivers = "$td/receivers.rad"; |
| 52 |
$facedat = "$td/face.dat"; |
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$behinddat = "$td/behind.dat"; |
| 54 |
$tf = "$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"; |
| 67 |
} |
| 68 |
my @savedARGV = @ARGV; |
| 69 |
my $rfluxmtx = "rfluxmtx -ab 5 -ad 700 -lw 3e-6"; |
| 70 |
my $wrapper = "wrapBSDF"; |
| 71 |
my $tensortree = 0; |
| 72 |
my $ttlog2 = 4; |
| 73 |
my $nsamp = 2000; |
| 74 |
my $mgfin = 0; |
| 75 |
my $geout = 1; |
| 76 |
my $nproc = 1; |
| 77 |
my $docolor = 0; |
| 78 |
my $doforw = 0; |
| 79 |
my $doback = 1; |
| 80 |
my $pctcull = 90; |
| 81 |
my $gunit = "meter"; |
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my $curspec = "Visible"; |
| 83 |
my @dim; |
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# Get options |
| 85 |
while ($#ARGV >= 0) { |
| 86 |
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 .= " $ARGV[1]"; |
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shift @ARGV; |
| 91 |
} elsif ("$ARGV[0]" =~ /^[-+]g/) { |
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$geout = ("$ARGV[0]" =~ /^\+/); |
| 93 |
$gunit = $ARGV[1]; |
| 94 |
if ($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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} |
| 97 |
shift @ARGV; |
| 98 |
} elsif ("$ARGV[0]" =~ /^[-+]C/) { |
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$docolor = ("$ARGV[0]" =~ /^\+/); |
| 100 |
} elsif ("$ARGV[0]" =~ /^[-+]f/) { |
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$doforw = ("$ARGV[0]" =~ /^\+/); |
| 102 |
} elsif ("$ARGV[0]" =~ /^[-+]b/) { |
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$doback = ("$ARGV[0]" =~ /^\+/); |
| 104 |
} elsif ("$ARGV[0]" eq "-t") { |
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# Use value < 0 for rttree_reduce bypass |
| 106 |
$pctcull = $ARGV[1]; |
| 107 |
if ($pctcull >= 100) { |
| 108 |
die "Illegal -t culling percentage, must be < 100\n"; |
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} |
| 110 |
shift @ARGV; |
| 111 |
} elsif ("$ARGV[0]" =~ /^-t[34]$/) { |
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$tensortree = substr($ARGV[0], 2, 1); |
| 113 |
$ttlog2 = $ARGV[1]; |
| 114 |
shift @ARGV; |
| 115 |
} elsif ("$ARGV[0]" eq "-s") { |
| 116 |
$wrapper .= " -f \"$ARGV[1]\""; |
| 117 |
shift @ARGV; |
| 118 |
} elsif ("$ARGV[0]" eq "-W") { |
| 119 |
$wrapper .= " -W"; |
| 120 |
} elsif ("$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 = $ARGV[1]; |
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shift @ARGV; |
| 126 |
} elsif ("$ARGV[0]" =~ /^-d/) { |
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userror() if ($#ARGV < 6); |
| 128 |
@dim = @ARGV[1..6]; |
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shift @ARGV for (1..6); |
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} elsif ("$ARGV[0]" =~ /^[-+]./) { |
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userror(); |
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} else { |
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last; |
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} |
| 135 |
shift @ARGV; |
| 136 |
} |
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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"; |
| 143 |
$wrapper .= " -u $gunit"; |
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# Get scene description and dimensions |
| 145 |
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 ( $? ); |
| 151 |
} |
| 152 |
if ($#dim != 5) { |
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@dim = split ' ', `getbbox -h $radscn`; |
| 154 |
} |
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print STDERR "Warning: Device extends into room\n" if ($dim[5] > 1e-5); |
| 156 |
$wrapper .= ' -f "t=' . ($dim[5] - $dim[4]) . ';w=' . ($dim[1] - $dim[0]) . |
| 157 |
';h=' . ($dim[3] - $dim[2]) . '"'; |
| 158 |
# Generate octree |
| 159 |
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 |
| 162 |
if ( $geout ) { |
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open(MGFSCN, "> $mgfscn"); |
| 164 |
printf MGFSCN "xf -t %.6f %.6f 0\n", -($dim[0]+$dim[1])/2, -($dim[2]+$dim[3])/2; |
| 165 |
close MGFSCN; |
| 166 |
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, ">> $mgfscn"); |
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print MGFSCN "xf\n"; |
| 173 |
close MGFSCN; |
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$wrapper .= " -g $mgfscn"; |
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} |
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# Create receiver & sender surfaces (rectangular) |
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my $FEPS = 1e-5; |
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my $nx = int(sqrt($nsamp*($dim[1]-$dim[0])/($dim[3]-$dim[2])) + 1); |
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my $ny = int($nsamp/$nx + 1); |
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$nsamp = $nx * $ny; |
| 181 |
my $ns = 2**$ttlog2; |
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open(RADSCN, "> $receivers"); |
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print RADSCN '#@rfluxmtx ' . ($tensortree ? "h=-sc$ns\n" : "h=-kf\n"); |
| 184 |
print RADSCN '#@rfluxmtx ' . "u=-Y o=$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 ' . ($tensortree ? "h=+sc$ns\n" : "h=+kf\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; |
| 192 |
# Finish rfluxmtx command and prepare sender surfaces |
| 193 |
$rfluxmtx .= " -n $nproc -c $nsamp"; |
| 194 |
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"); |
| 197 |
print RADSCN "void polygon fwd_sender\n0\n0\n12\n"; |
| 198 |
printf RADSCN "\t%e\t%e\t%e\n", $dim[0], $dim[2], $dim[4]-$FEPS; |
| 199 |
printf RADSCN "\t%e\t%e\t%e\n", $dim[0], $dim[3], $dim[4]-$FEPS; |
| 200 |
printf RADSCN "\t%e\t%e\t%e\n", $dim[1], $dim[3], $dim[4]-$FEPS; |
| 201 |
printf RADSCN "\t%e\t%e\t%e\n", $dim[1], $dim[2], $dim[4]-$FEPS; |
| 202 |
close RADSCN; |
| 203 |
open (RADSCN, "> $bsender"); |
| 204 |
print RADSCN '#@rfluxmtx u=-Y ' . ($tensortree ? "h=+sc$ns\n\n" : "h=+kf\n\n"); |
| 205 |
print RADSCN "void polygon bwd_sender\n0\n0\n12\n"; |
| 206 |
printf RADSCN "\t%e\t%e\t%e\n", $dim[0], $dim[2], $dim[5]+$FEPS; |
| 207 |
printf RADSCN "\t%e\t%e\t%e\n", $dim[1], $dim[2], $dim[5]+$FEPS; |
| 208 |
printf RADSCN "\t%e\t%e\t%e\n", $dim[1], $dim[3], $dim[5]+$FEPS; |
| 209 |
printf RADSCN "\t%e\t%e\t%e\n", $dim[0], $dim[3], $dim[5]+$FEPS; |
| 210 |
close RADSCN; |
| 211 |
} |
| 212 |
# Calculate CIE (u',v') from Radiance RGB: |
| 213 |
my $CIEuv = 'Xi=.5141*Ri+.3239*Gi+.1620*Bi;' . |
| 214 |
'Yi=.2651*Ri+.6701*Gi+.0648*Bi;' . |
| 215 |
'Zi=.0241*Ri+.1229*Gi+.8530*Bi;' . |
| 216 |
'den=Xi+15*Yi+3*Zi;' . |
| 217 |
'uprime=4*Xi/den;vprime=9*Yi/den;' ; |
| 218 |
# Create data segments (all the work happens here) |
| 219 |
if ( $tensortree ) { |
| 220 |
do_tree_bsdf(); |
| 221 |
} else { |
| 222 |
do_matrix_bsdf(); |
| 223 |
} |
| 224 |
# Output XML |
| 225 |
my $old_fh = select(STDOUT); |
| 226 |
$| = 1; |
| 227 |
select($old_fh); |
| 228 |
print "<!-- Created by: genBSDF @savedARGV -->\n"; |
| 229 |
# print STDERR "Running: $wrapper\n"; |
| 230 |
system $wrapper; |
| 231 |
die "Could not wrap BSDF data\n" if ( $? ); |
| 232 |
# Clean up temporary files and exit |
| 233 |
exec $rmtmp; |
| 234 |
|
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#-------------- End of main program segment --------------# |
| 236 |
|
| 237 |
#++++++++++++++ Tensor tree BSDF generation ++++++++++++++# |
| 238 |
sub do_tree_bsdf { |
| 239 |
|
| 240 |
# Run rfluxmtx processes to compute each side |
| 241 |
do_ttree_dir(0) if ( $doback ); |
| 242 |
do_ttree_dir(1) if ( $doforw ); |
| 243 |
|
| 244 |
} # end of sub do_tree_bsdf() |
| 245 |
|
| 246 |
# Call rfluxmtx and process tensor tree BSDF for the given direction |
| 247 |
sub do_ttree_dir { |
| 248 |
my $forw = shift; |
| 249 |
my $cmd; |
| 250 |
if ( $tensortree == 3 ) { |
| 251 |
# Isotropic BSDF |
| 252 |
my $ns2 = $ns / 2; |
| 253 |
if ($windoz) { |
| 254 |
$cmd = "cnt $ns2 $ny $nx " . |
| 255 |
qq{| rcalc -e "r1=rand(.8681*recno-.673892)" } . |
| 256 |
qq{-e "r2=rand(-5.37138*recno+67.1737811)" } . |
| 257 |
qq{-e "r3=rand(+3.17603772*recno+83.766771)" } . |
| 258 |
qq{-e "Dx=1-2*(\$1+r1)/$ns;Dy:0;Dz=sqrt(1-Dx*Dx)" } . |
| 259 |
qq{-e "xp=(\$3+r2)*(($dim[1]-$dim[0])/$nx)+$dim[0]" } . |
| 260 |
qq{-e "yp=(\$2+r3)*(($dim[3]-$dim[2])/$ny)+$dim[2]" } . |
| 261 |
qq{-e "zp=$dim[5-$forw]" -e "myDz=Dz*($forw*2-1)" } . |
| 262 |
qq{-e "\$1=xp-Dx;\$2=yp-Dy;\$3=zp-myDz" } . |
| 263 |
qq{-e "\$4=Dx;\$5=Dy;\$6=myDz" } . |
| 264 |
"| $rfluxmtx -fa -y $ns2 - $receivers -i $octree"; |
| 265 |
} else { |
| 266 |
$cmd = "cnt $ns2 $ny $nx " . |
| 267 |
qq{| rcalc -e "r1=rand(.8681*recno-.673892)" } . |
| 268 |
qq{-e "r2=rand(-5.37138*recno+67.1737811)" } . |
| 269 |
qq{-e "r3=rand(+3.17603772*recno+83.766771)" } . |
| 270 |
qq{-e "Dx=1-2*(\$1+r1)/$ns;Dy:0;Dz=sqrt(1-Dx*Dx)" } . |
| 271 |
qq{-e "xp=(\$3+r2)*(($dim[1]-$dim[0])/$nx)+$dim[0]" } . |
| 272 |
qq{-e "yp=(\$2+r3)*(($dim[3]-$dim[2])/$ny)+$dim[2]" } . |
| 273 |
qq{-e "zp=$dim[5-$forw]" -e "myDz=Dz*($forw*2-1)" } . |
| 274 |
qq{-e '\$1=xp-Dx;\$2=yp-Dy;\$3=zp-myDz' } . |
| 275 |
qq{-e '\$4=Dx;\$5=Dy;\$6=myDz' -of } . |
| 276 |
"| $rfluxmtx -h -ff -y $ns2 - $receivers -i $octree"; |
| 277 |
} |
| 278 |
} else { |
| 279 |
# Anisotropic BSDF |
| 280 |
my $sender = ($bsender,$fsender)[$forw]; |
| 281 |
if ($windoz) { |
| 282 |
$cmd = "$rfluxmtx -fa $sender $receivers -i $octree"; |
| 283 |
} else { |
| 284 |
$cmd = "$rfluxmtx -h -ff $sender $receivers -i $octree"; |
| 285 |
} |
| 286 |
} |
| 287 |
# print STDERR "Starting: $cmd\n"; |
| 288 |
system $cmd; |
| 289 |
die "Failure running rfluxmtx" if ( $? ); |
| 290 |
ttree_out($forw); |
| 291 |
} # end of do_ttree_dir() |
| 292 |
|
| 293 |
# Simplify and store tensor tree results |
| 294 |
sub ttree_out { |
| 295 |
my $forw = shift; |
| 296 |
my ($refldat,$transdat); |
| 297 |
if ( $forw ) { |
| 298 |
$transdat = $facedat; |
| 299 |
$refldat = $behinddat; |
| 300 |
} else { |
| 301 |
$transdat = $behinddat; |
| 302 |
$refldat = $facedat; |
| 303 |
} |
| 304 |
# Only output one transmitted anisotropic distribution, preferring backwards |
| 305 |
if ( !$forw || !$doback || $tensortree==3 ) { |
| 306 |
my $ttyp = ("tb","tf")[$forw]; |
| 307 |
ttree_comp($ttyp, "Visible", $transdat, ($tb,$tf)[$forw]); |
| 308 |
if ( $docolor ) { |
| 309 |
ttree_comp($ttyp, "CIE-u", $transdat, ($tbx,$tfx)[$forw]); |
| 310 |
ttree_comp($ttyp, "CIE-v", $transdat, ($tbz,$tfz)[$forw]); |
| 311 |
} |
| 312 |
} |
| 313 |
# Output reflection |
| 314 |
my $rtyp = ("rb","rf")[$forw]; |
| 315 |
ttree_comp($rtyp, "Visible", $refldat, ($rb,$rf)[$forw]); |
| 316 |
if ( $docolor ) { |
| 317 |
ttree_comp($rtyp, "CIE-u", $refldat, ($rbx,$rfx)[$forw]); |
| 318 |
ttree_comp($rtyp, "CIE-v", $refldat, ($rbz,$rfz)[$forw]); |
| 319 |
} |
| 320 |
} # end of ttree_out() |
| 321 |
|
| 322 |
# Call rttree_reduce on the given component |
| 323 |
sub ttree_comp { |
| 324 |
my $typ = shift; |
| 325 |
my $spec = shift; |
| 326 |
my $src = shift; |
| 327 |
my $dest = shift; |
| 328 |
my $cmd; |
| 329 |
if ($windoz) { |
| 330 |
if ("$spec" eq "Visible") { |
| 331 |
$cmd = qq{rcalc -e "Omega:PI/($ns*$ns)" } . |
| 332 |
q{-e "Ri=$1;Gi=$2;Bi=$3" } . |
| 333 |
qq{-e "$CIEuv" } . |
| 334 |
q{-e "$1=Yi/Omega"}; |
| 335 |
} elsif ("$spec" eq "CIE-u") { |
| 336 |
$cmd = q{rcalc -e "Ri=$1;Gi=$2;Bi=$3" } . |
| 337 |
qq{-e "$CIEuv" } . |
| 338 |
q{-e "$1=uprime"}; |
| 339 |
} elsif ("$spec" eq "CIE-v") { |
| 340 |
$cmd = q{rcalc -e "Ri=$1;Gi=$2;Bi=$3" } . |
| 341 |
qq{-e "$CIEuv" } . |
| 342 |
q{-e "$1=vprime"}; |
| 343 |
} |
| 344 |
} else { |
| 345 |
if ("$spec" eq "Visible") { |
| 346 |
$cmd = "rcalc -if3 -e 'Omega:PI/($ns*$ns)' " . |
| 347 |
q{-e 'Ri=$1;Gi=$2;Bi=$3' } . |
| 348 |
"-e '$CIEuv' " . |
| 349 |
q{-e '$1=Yi/Omega'}; |
| 350 |
} elsif ("$spec" eq "CIE-u") { |
| 351 |
$cmd = q{rcalc -if3 -e 'Ri=$1;Gi=$2;Bi=$3' } . |
| 352 |
"-e '$CIEuv' " . |
| 353 |
q{-e '$1=uprime'}; |
| 354 |
} elsif ("$spec" eq "CIE-v") { |
| 355 |
$cmd = q{rcalc -if3 -e 'Ri=$1;Gi=$2;Bi=$3' } . |
| 356 |
"-e '$CIEuv' " . |
| 357 |
q{-e '$1=vprime'}; |
| 358 |
} |
| 359 |
} |
| 360 |
if ($pctcull >= 0) { |
| 361 |
my $avg = ( "$typ" =~ /^r[fb]/ ) ? " -a" : ""; |
| 362 |
my $pcull = ("$spec" eq "Visible") ? $pctcull : |
| 363 |
(100 - (100-$pctcull)*.25) ; |
| 364 |
if ($windoz) { |
| 365 |
$cmd = "rcollate -ho -oc 1 $src | " . |
| 366 |
$cmd . |
| 367 |
" | rttree_reduce$avg -h -fa -t $pcull -r $tensortree -g $ttlog2"; |
| 368 |
} else { |
| 369 |
$cmd .= " -of $src " . |
| 370 |
"| rttree_reduce$avg -h -ff -t $pcull -r $tensortree -g $ttlog2"; |
| 371 |
} |
| 372 |
# print STDERR "Running: $cmd\n"; |
| 373 |
system "$cmd > $dest"; |
| 374 |
die "Failure running rttree_reduce" if ( $? ); |
| 375 |
} else { |
| 376 |
if ($windoz) { |
| 377 |
$cmd = "rcollate -ho -oc 1 $src | " . $cmd ; |
| 378 |
} else { |
| 379 |
$cmd .= " $src"; |
| 380 |
} |
| 381 |
open(DATOUT, "> $dest"); |
| 382 |
print DATOUT "{\n"; |
| 383 |
close DATOUT; |
| 384 |
# print STDERR "Running: $cmd\n"; |
| 385 |
system "$cmd >> $dest"; |
| 386 |
die "Failure running rcalc" if ( $? ); |
| 387 |
open(DATOUT, ">> $dest"); |
| 388 |
for (my $i = ($tensortree==3)*$ns*$ns*$ns/2; $i-- > 0; ) { |
| 389 |
print DATOUT "0\n"; |
| 390 |
} |
| 391 |
print DATOUT "}\n"; |
| 392 |
close DATOUT; |
| 393 |
} |
| 394 |
if ( "$spec" ne "$curspec" ) { |
| 395 |
$wrapper .= " -s $spec"; |
| 396 |
$curspec = $spec; |
| 397 |
} |
| 398 |
$wrapper .= " -$typ $dest"; |
| 399 |
} # end of ttree_comp() |
| 400 |
|
| 401 |
#------------- End of do_tree_bsdf() & subroutines -------------# |
| 402 |
|
| 403 |
#+++++++++++++++ Klems matrix BSDF generation +++++++++++++++# |
| 404 |
sub do_matrix_bsdf { |
| 405 |
|
| 406 |
# Run rfluxmtx processes to compute each side |
| 407 |
do_matrix_dir(0) if ( $doback ); |
| 408 |
do_matrix_dir(1) if ( $doforw ); |
| 409 |
|
| 410 |
} # end of sub do_matrix_bsdf() |
| 411 |
|
| 412 |
# Call rfluxmtx and process tensor tree BSDF for the given direction |
| 413 |
sub do_matrix_dir { |
| 414 |
my $forw = shift; |
| 415 |
my $cmd; |
| 416 |
my $sender = ($bsender,$fsender)[$forw]; |
| 417 |
$cmd = "$rfluxmtx -fd $sender $receivers -i $octree"; |
| 418 |
# print STDERR "Starting: $cmd\n"; |
| 419 |
system $cmd; |
| 420 |
die "Failure running rfluxmtx" if ( $? ); |
| 421 |
matrix_out($forw); |
| 422 |
} # end of do_matrix_dir() |
| 423 |
|
| 424 |
sub matrix_out { |
| 425 |
my $forw = shift; |
| 426 |
my ($refldat,$transdat); |
| 427 |
if ( $forw ) { |
| 428 |
$transdat = $facedat; |
| 429 |
$refldat = $behinddat; |
| 430 |
} else { |
| 431 |
$transdat = $behinddat; |
| 432 |
$refldat = $facedat; |
| 433 |
} |
| 434 |
# Output transmission |
| 435 |
my $ttyp = ("tb","tf")[$forw]; |
| 436 |
matrix_comp($ttyp, "Visible", $transdat, ($tb,$tf)[$forw]); |
| 437 |
if ( $docolor ) { |
| 438 |
matrix_comp($ttyp, "CIE-X", $transdat, ($tbx,$tfx)[$forw]); |
| 439 |
matrix_comp($ttyp, "CIE-Z", $transdat, ($tbz,$tfz)[$forw]); |
| 440 |
} |
| 441 |
# Output reflection |
| 442 |
my $rtyp = ("rb","rf")[$forw]; |
| 443 |
matrix_comp($rtyp, "Visible", $refldat, ($rb,$rf)[$forw]); |
| 444 |
if ( $docolor ) { |
| 445 |
matrix_comp($rtyp, "CIE-X", $refldat, ($rbx,$rfx)[$forw]); |
| 446 |
matrix_comp($rtyp, "CIE-Z", $refldat, ($rbz,$rfz)[$forw]); |
| 447 |
} |
| 448 |
} # end of matrix_out() |
| 449 |
|
| 450 |
# Transpose matrix component data and save to file |
| 451 |
sub matrix_comp { |
| 452 |
my $typ = shift; |
| 453 |
my $spec = shift; |
| 454 |
my $src = shift; |
| 455 |
my $dest = shift; |
| 456 |
my $cmd = "rmtxop -fa -t"; |
| 457 |
if ("$spec" eq "Visible") { |
| 458 |
$cmd .= " -c 0.2651 0.6701 0.0648"; |
| 459 |
} elsif ("$spec" eq "CIE-X") { |
| 460 |
$cmd .= " -c 0.5141 0.3239 0.1620"; |
| 461 |
} elsif ("$spec" eq "CIE-Z") { |
| 462 |
$cmd .= " -c 0.0241 0.1229 0.8530"; |
| 463 |
} |
| 464 |
$cmd .= " $src | rcollate -ho -oc 145"; |
| 465 |
# print STDERR "Running: $cmd\n"; |
| 466 |
system "$cmd > $dest"; |
| 467 |
die "Failure running rttree_reduce" if ( $? ); |
| 468 |
if ( "$spec" ne "$curspec" ) { |
| 469 |
$wrapper .= " -s $spec"; |
| 470 |
$curspec = $spec; |
| 471 |
} |
| 472 |
$wrapper .= " -$typ $dest"; |
| 473 |
} # end of matrix_comp() |
| 474 |
|
| 475 |
#------------- End of do_matrix_bsdf() & subroutines --------------# |
