| 1 |
#!/usr/bin/perl -w |
| 2 |
# RCSid $Id: genBSDF.pl,v 2.12 2011/02/24 20:27:00 greg Exp $ |
| 3 |
# |
| 4 |
# Compute BSDF based on geometry and material description |
| 5 |
# |
| 6 |
# G. Ward |
| 7 |
# |
| 8 |
use strict; |
| 9 |
use File::Temp qw/ :mktemp /; |
| 10 |
sub userror { |
| 11 |
print STDERR "Usage: genBSDF [-n Nproc][-c Nsamp][-r \"ropts\"][-dim xmin xmax ymin ymax zmin zmax][{+|-}f][{+|-}b][{+|-}mgf][{+|-}geom] [input ..]\n"; |
| 12 |
exit 1; |
| 13 |
} |
| 14 |
my $td = mkdtemp("/tmp/genBSDF.XXXXXX"); |
| 15 |
chomp $td; |
| 16 |
my $nsamp = 1000; |
| 17 |
my $rtargs = "-w -ab 5 -ad 700 -lw 3e-6"; |
| 18 |
my $mgfin = 0; |
| 19 |
my $geout = 1; |
| 20 |
my $nproc = 1; |
| 21 |
my $doforw = 0; |
| 22 |
my $doback = 1; |
| 23 |
my @dim; |
| 24 |
# Get options |
| 25 |
while ($#ARGV >= 0) { |
| 26 |
if ("$ARGV[0]" =~ /^[-+]m/) { |
| 27 |
$mgfin = ("$ARGV[0]" =~ /^\+/); |
| 28 |
} elsif ("$ARGV[0]" eq "-r") { |
| 29 |
$rtargs = "$rtargs $ARGV[1]"; |
| 30 |
shift @ARGV; |
| 31 |
} elsif ("$ARGV[0]" =~ /^[-+]g/) { |
| 32 |
$geout = ("$ARGV[0]" =~ /^\+/); |
| 33 |
} elsif ("$ARGV[0]" =~ /^[-+]f/) { |
| 34 |
$doforw = ("$ARGV[0]" =~ /^\+/); |
| 35 |
} elsif ("$ARGV[0]" =~ /^[-+]b/) { |
| 36 |
$doback = ("$ARGV[0]" =~ /^\+/); |
| 37 |
} elsif ("$ARGV[0]" eq "-c") { |
| 38 |
$nsamp = $ARGV[1]; |
| 39 |
shift @ARGV; |
| 40 |
} elsif ("$ARGV[0]" eq "-n") { |
| 41 |
$nproc = $ARGV[1]; |
| 42 |
shift @ARGV; |
| 43 |
} elsif ("$ARGV[0]" =~ /^-d/) { |
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userror() if ($#ARGV < 6); |
| 45 |
@dim = @ARGV[1..6]; |
| 46 |
shift @ARGV for (1..6); |
| 47 |
} elsif ("$ARGV[0]" =~ /^[-+]./) { |
| 48 |
userror(); |
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} else { |
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last; |
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} |
| 52 |
shift @ARGV; |
| 53 |
} |
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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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my $octree = "$td/device.oct"; |
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if ( $mgfin ) { |
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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"; |
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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 "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 ' ', `getbbox -h $radscn`; |
| 71 |
} |
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print STDERR "Warning: Device extends into room\n" if ($dim[5] > 1e-5); |
| 73 |
# 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 $fmodnm\n0\n0\n4 1 1 1 0\n\n"; |
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print RADSCN "$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 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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Kmax : Kaccum(Knaz(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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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; |
| 101 |
Dy = sin(Kazi)*sin_kpol; |
| 102 |
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))); |
| 106 |
'; |
| 107 |
# Compute Klems bin from exiting ray direction (forward or backward) |
| 108 |
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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kpola(r) : select(r, 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, pol) : if(r-kpola(0)+.5, r, |
| 118 |
if(pol-kpola(r), kfindrow(r+1, pol), r) ); |
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kazn(azi,inc) : if((360-.5*inc)-azi, floor((azi+.5*inc)/inc), 0); |
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kbin2(pol,azi) = select(kfindrow(1, pol), |
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kazn(azi,360/knaz(1)), |
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kaccum(1) + kazn(azi,360/knaz(2)), |
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kaccum(2) + kazn(azi,360/knaz(3)), |
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kaccum(3) + kazn(azi,360/knaz(4)), |
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kaccum(4) + kazn(azi,360/knaz(5)), |
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kaccum(5) + kazn(azi,360/knaz(6)), |
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kaccum(6) + kazn(azi,360/knaz(7)), |
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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(abs(Dz)),Atan2(Dy,Dx)); |
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'; |
| 133 |
my $ndiv = 145; |
| 134 |
my $nx = int(sqrt($nsamp*($dim[1]-$dim[0])/($dim[3]-$dim[2])) + .5); |
| 135 |
my $ny = int($nsamp/$nx + .5); |
| 136 |
$nsamp = $nx * $ny; |
| 137 |
# Compute scattering data using rtcontrib |
| 138 |
my @tfarr; |
| 139 |
my @rfarr; |
| 140 |
my @tbarr; |
| 141 |
my @rbarr; |
| 142 |
my $cmd; |
| 143 |
my $rtcmd = "rtcontrib -h -ff -fo -n $nproc -c $nsamp " . |
| 144 |
"-e '$kcal' -b kbin -bn $ndiv " . |
| 145 |
"-o '$td/%s.flt' -m $fmodnm -m $bmodnm $rtargs $octree"; |
| 146 |
my $rccmd = "rcalc -e '$tcal' " . |
| 147 |
"-e 'mod(n,d):n-floor(n/d)*d' -e 'Kbin=mod(recno-.999,$ndiv)' " . |
| 148 |
q{-if3 -e '$1=(0.265*$1+0.670*$2+0.065*$3)/KprojOmega'}; |
| 149 |
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' } . |
| 156 |
"| $rtcmd"; |
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system "$cmd" || die "Failure running: $cmd\n"; |
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@tfarr = `$rccmd $td/$fmodnm.flt`; |
| 159 |
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 ( $? ); |
| 162 |
} |
| 163 |
if ( $doback ) { |
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$cmd = "cnt $ndiv $ny $nx | rcalc -of -e '$tcal' " . |
| 165 |
"-e 'xp=(\$3+rand(.35*recno-15))*(($dim[1]-$dim[0])/$nx)+$dim[0]' " . |
| 166 |
"-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' } . |
| 170 |
"| $rtcmd"; |
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system "$cmd" || die "Failure running: $cmd\n"; |
| 172 |
@tbarr = `$rccmd $td/$bmodnm.flt`; |
| 173 |
die "Failure running: $rccmd $td/$bmodnm.flt\n" if ( $? ); |
| 174 |
@rbarr = `$rccmd $td/$fmodnm.flt`; |
| 175 |
die "Failure running: $rccmd $td/$fmodnm.flt\n" if ( $? ); |
| 176 |
} |
| 177 |
# Output XML prologue |
| 178 |
print |
| 179 |
'<?xml version="1.0" encoding="UTF-8"?> |
| 180 |
<WindowElement xmlns="http://windows.lbl.gov" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://windows.lbl.gov/BSDF-v1.4.xsd"> |
| 181 |
<WindowElementType>System</WindowElementType> |
| 182 |
<Optical> |
| 183 |
<Layer> |
| 184 |
<Material> |
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<Name>Name</Name> |
| 186 |
<Manufacturer>Manufacturer</Manufacturer> |
| 187 |
'; |
| 188 |
printf "\t\t\t<Thickness unit=\"Meter\">%.3f</Thickness>\n", $dim[5] - $dim[4]; |
| 189 |
printf "\t\t\t<Width unit=\"Meter\">%.3f</Width>\n", $dim[1] - $dim[0]; |
| 190 |
printf "\t\t\t<Height unit=\"Meter\">%.3f</Height>\n", $dim[3] - $dim[2]; |
| 191 |
print "\t\t\t<DeviceType>Integral</DeviceType>\n"; |
| 192 |
# Output MGF description if requested |
| 193 |
if ( $geout ) { |
| 194 |
print "\t\t\t<Geometry format=\"MGF\" unit=\"Meter\">\n"; |
| 195 |
printf "xf -t %.6f %.6f 0\n", -($dim[0]+$dim[1])/2, -($dim[2]+$dim[3])/2; |
| 196 |
system "cat $mgfscn"; |
| 197 |
print "xf\n"; |
| 198 |
print "\t\t\t</Geometry>\n"; |
| 199 |
} |
| 200 |
print ' </Material> |
| 201 |
<DataDefinition> |
| 202 |
<IncidentDataStructure>Columns</IncidentDataStructure> |
| 203 |
<AngleBasis> |
| 204 |
<AngleBasisName>LBNL/Klems Full</AngleBasisName> |
| 205 |
<AngleBasisBlock> |
| 206 |
<Theta>0</Theta> |
| 207 |
<nPhis>1</nPhis> |
| 208 |
<ThetaBounds> |
| 209 |
<LowerTheta>0</LowerTheta> |
| 210 |
<UpperTheta>5</UpperTheta> |
| 211 |
</ThetaBounds> |
| 212 |
</AngleBasisBlock> |
| 213 |
<AngleBasisBlock> |
| 214 |
<Theta>10</Theta> |
| 215 |
<nPhis>8</nPhis> |
| 216 |
<ThetaBounds> |
| 217 |
<LowerTheta>5</LowerTheta> |
| 218 |
<UpperTheta>15</UpperTheta> |
| 219 |
</ThetaBounds> |
| 220 |
</AngleBasisBlock> |
| 221 |
<AngleBasisBlock> |
| 222 |
<Theta>20</Theta> |
| 223 |
<nPhis>16</nPhis> |
| 224 |
<ThetaBounds> |
| 225 |
<LowerTheta>15</LowerTheta> |
| 226 |
<UpperTheta>25</UpperTheta> |
| 227 |
</ThetaBounds> |
| 228 |
</AngleBasisBlock> |
| 229 |
<AngleBasisBlock> |
| 230 |
<Theta>30</Theta> |
| 231 |
<nPhis>20</nPhis> |
| 232 |
<ThetaBounds> |
| 233 |
<LowerTheta>25</LowerTheta> |
| 234 |
<UpperTheta>35</UpperTheta> |
| 235 |
</ThetaBounds> |
| 236 |
</AngleBasisBlock> |
| 237 |
<AngleBasisBlock> |
| 238 |
<Theta>40</Theta> |
| 239 |
<nPhis>24</nPhis> |
| 240 |
<ThetaBounds> |
| 241 |
<LowerTheta>35</LowerTheta> |
| 242 |
<UpperTheta>45</UpperTheta> |
| 243 |
</ThetaBounds> |
| 244 |
</AngleBasisBlock> |
| 245 |
<AngleBasisBlock> |
| 246 |
<Theta>50</Theta> |
| 247 |
<nPhis>24</nPhis> |
| 248 |
<ThetaBounds> |
| 249 |
<LowerTheta>45</LowerTheta> |
| 250 |
<UpperTheta>55</UpperTheta> |
| 251 |
</ThetaBounds> |
| 252 |
</AngleBasisBlock> |
| 253 |
<AngleBasisBlock> |
| 254 |
<Theta>60</Theta> |
| 255 |
<nPhis>24</nPhis> |
| 256 |
<ThetaBounds> |
| 257 |
<LowerTheta>55</LowerTheta> |
| 258 |
<UpperTheta>65</UpperTheta> |
| 259 |
</ThetaBounds> |
| 260 |
</AngleBasisBlock> |
| 261 |
<AngleBasisBlock> |
| 262 |
<Theta>70</Theta> |
| 263 |
<nPhis>16</nPhis> |
| 264 |
<ThetaBounds> |
| 265 |
<LowerTheta>65</LowerTheta> |
| 266 |
<UpperTheta>75</UpperTheta> |
| 267 |
</ThetaBounds> |
| 268 |
</AngleBasisBlock> |
| 269 |
<AngleBasisBlock> |
| 270 |
<Theta>82.5</Theta> |
| 271 |
<nPhis>12</nPhis> |
| 272 |
<ThetaBounds> |
| 273 |
<LowerTheta>75</LowerTheta> |
| 274 |
<UpperTheta>90</UpperTheta> |
| 275 |
</ThetaBounds> |
| 276 |
</AngleBasisBlock> |
| 277 |
</AngleBasis> |
| 278 |
</DataDefinition> |
| 279 |
'; |
| 280 |
if ( $doforw ) { |
| 281 |
print ' <WavelengthData> |
| 282 |
<LayerNumber>System</LayerNumber> |
| 283 |
<Wavelength unit="Integral">Visible</Wavelength> |
| 284 |
<SourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum> |
| 285 |
<DetectorSpectrum>ASTM E308 1931 Y.dsp</DetectorSpectrum> |
| 286 |
<WavelengthDataBlock> |
| 287 |
<WavelengthDataDirection>Transmission Front</WavelengthDataDirection> |
| 288 |
<ColumnAngleBasis>LBNL/Klems Full</ColumnAngleBasis> |
| 289 |
<RowAngleBasis>LBNL/Klems Full</RowAngleBasis> |
| 290 |
<ScatteringDataType>BTDF</ScatteringDataType> |
| 291 |
<ScatteringData> |
| 292 |
'; |
| 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 |
<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 |
'; |
| 383 |
# Clean up temporary files |
| 384 |
system "rm -rf $td"; |
