| 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 ($windoz) { | 
| 16 | 
> | 
my ($tf,$rf,$tb,$rb,$tfx,$rfx,$tbx,$rbx,$tfz,$rfz,$tbz,$rbz,$cph); | 
| 17 | 
> | 
my ($curphase, $recovery); | 
| 18 | 
> | 
if ($#ARGV == 1 && "$ARGV[0]" =~ /^-rec/) { | 
| 19 | 
> | 
        $td = $ARGV[1]; | 
| 20 | 
> | 
        open(MYAVH, "< $td/savedARGV.txt") or die "$td: invalid path\n"; | 
| 21 | 
> | 
        @ARGV = <MYAVH>; | 
| 22 | 
> | 
        close MYAVH; | 
| 23 | 
> | 
        chomp @ARGV; | 
| 24 | 
> | 
        $recovery = 0; | 
| 25 | 
> | 
        if (open(MYPH, "< $td/phase.txt")) { | 
| 26 | 
> | 
                while (<MYPH>) { | 
| 27 | 
> | 
                        chomp($recovery = $_); | 
| 28 | 
> | 
                } | 
| 29 | 
> | 
                close MYPH; | 
| 30 | 
> | 
        } | 
| 31 | 
> | 
} elsif ($windoz) { | 
| 32 | 
  | 
        my $tmploc = `echo \%TMP\%`; | 
| 33 | 
< | 
        chomp($tmploc); | 
| 33 | 
> | 
        chomp $tmploc; | 
| 34 | 
  | 
        $td = mkdtemp("$tmploc\\genBSDF.XXXXXX"); | 
| 35 | 
+ | 
} else { | 
| 36 | 
+ | 
        $td = mkdtemp("/tmp/genBSDF.XXXXXX"); | 
| 37 | 
+ | 
        chomp $td; | 
| 38 | 
+ | 
} | 
| 39 | 
+ | 
if ($windoz) { | 
| 40 | 
  | 
        $radscn = "$td\\device.rad"; | 
| 41 | 
  | 
        $mgfscn = "$td\\device.mgf"; | 
| 42 | 
  | 
        $octree = "$td\\device.oct"; | 
| 57 | 
  | 
        $rfz = "$td\\rfz.dat"; | 
| 58 | 
  | 
        $tbz = "$td\\tbz.dat"; | 
| 59 | 
  | 
        $rbz = "$td\\rbz.dat"; | 
| 60 | 
< | 
        chomp $td; | 
| 60 | 
> | 
        $cph = "$td\\phase.txt"; | 
| 61 | 
  | 
        $rmtmp = "rd /S /Q $td"; | 
| 62 | 
  | 
} else { | 
| 44 | 
– | 
        $td = mkdtemp("/tmp/genBSDF.XXXXXX"); | 
| 45 | 
– | 
        chomp $td; | 
| 63 | 
  | 
        $radscn = "$td/device.rad"; | 
| 64 | 
  | 
        $mgfscn = "$td/device.mgf"; | 
| 65 | 
  | 
        $octree = "$td/device.oct"; | 
| 80 | 
  | 
        $rfz = "$td/rfz.dat"; | 
| 81 | 
  | 
        $tbz = "$td/tbz.dat"; | 
| 82 | 
  | 
        $rbz = "$td/rbz.dat"; | 
| 83 | 
+ | 
        $cph = "$td/phase.txt"; | 
| 84 | 
  | 
        $rmtmp = "rm -rf $td"; | 
| 85 | 
  | 
} | 
| 86 | 
  | 
my @savedARGV = @ARGV; | 
| 154 | 
  | 
} | 
| 155 | 
  | 
# Check that we're actually being asked to do something | 
| 156 | 
  | 
die "Must have at least one of +forward or +backward\n" if (!$doforw && !$doback); | 
| 139 | 
– | 
# Issue warning for unhandled reciprocity case | 
| 140 | 
– | 
print STDERR "Warning: recommend both +forward and +backward with -t3\n" if | 
| 141 | 
– | 
                ($tensortree==3 && !($doforw && $doback)); | 
| 157 | 
  | 
$wrapper .= $tensortree ? " -a t$tensortree" : " -a kf -c"; | 
| 158 | 
  | 
$wrapper .= " -u $gunit"; | 
| 159 | 
< | 
# Get scene description and dimensions | 
| 160 | 
< | 
if ( $mgfin ) { | 
| 161 | 
< | 
        system "mgf2rad @ARGV > $radscn"; | 
| 162 | 
< | 
        die "Could not load MGF input\n" if ( $? ); | 
| 163 | 
< | 
} else { | 
| 164 | 
< | 
        system "xform -e @ARGV > $radscn"; | 
| 165 | 
< | 
        die "Could not load Radiance input\n" if ( $? ); | 
| 159 | 
> | 
if ( !defined $recovery ) { | 
| 160 | 
> | 
        # Issue warning for unhandled reciprocity case | 
| 161 | 
> | 
        print STDERR "Warning: recommend both +forward and +backward with -t3\n" if | 
| 162 | 
> | 
                        ($tensortree==3 && !($doforw && $doback)); | 
| 163 | 
> | 
        # Get scene description | 
| 164 | 
> | 
        if ( $mgfin ) { | 
| 165 | 
> | 
                system "mgf2rad @ARGV > $radscn"; | 
| 166 | 
> | 
                die "Could not load MGF input\n" if ( $? ); | 
| 167 | 
> | 
        } else { | 
| 168 | 
> | 
                system "xform -e @ARGV > $radscn"; | 
| 169 | 
> | 
                die "Could not load Radiance input\n" if ( $? ); | 
| 170 | 
> | 
        } | 
| 171 | 
  | 
} | 
| 172 | 
< | 
if ($#dim != 5) { | 
| 172 | 
> | 
if ( $#dim != 5 ) { | 
| 173 | 
  | 
        @dim = split ' ', `getbbox -h $radscn`; | 
| 174 | 
  | 
} | 
| 175 | 
< | 
die "Device entirely inside room!\n" if ($dim[4] >= 0); | 
| 176 | 
< | 
if ($dim[5] > 1e-5) { | 
| 175 | 
> | 
die "Device entirely inside room!\n" if ( $dim[4] >= 0 ); | 
| 176 | 
> | 
if ( $dim[5] > 1e-5 ) { | 
| 177 | 
  | 
        print STDERR "Warning: Device extends into room\n"; | 
| 178 | 
< | 
} elsif ($dim[5]*$dim[5] > .01*($dim[1]-$dim[0])*($dim[3]-$dim[2])) { | 
| 178 | 
> | 
} elsif ( $dim[5]*$dim[5] > .01*($dim[1]-$dim[0])*($dim[3]-$dim[2]) ) { | 
| 179 | 
  | 
        print STDERR "Warning: Device far behind Z==0 plane\n"; | 
| 180 | 
  | 
} | 
| 181 | 
  | 
# Assume Zmax==0 to derive thickness so pkgBSDF will work | 
| 182 | 
  | 
$wrapper .= ' -f "t=' . (-$dim[4]) . ';w=' . ($dim[1] - $dim[0]) . | 
| 183 | 
  | 
                ';h=' . ($dim[3] - $dim[2]) . '"'; | 
| 184 | 
< | 
# Generate octree | 
| 185 | 
< | 
system "oconv -w $radscn > $octree"; | 
| 186 | 
< | 
die "Could not compile scene\n" if ( $? ); | 
| 187 | 
< | 
# Add MGF description if requested | 
| 188 | 
< | 
if ( $geout ) { | 
| 189 | 
< | 
        open(MGFSCN, "> $mgfscn"); | 
| 190 | 
< | 
        printf MGFSCN "xf -t %.6f %.6f 0\n", -($dim[0]+$dim[1])/2, -($dim[2]+$dim[3])/2; | 
| 171 | 
< | 
        close MGFSCN; | 
| 172 | 
< | 
        if ( $mgfin ) { | 
| 173 | 
< | 
                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}; | 
| 174 | 
< | 
        } else { | 
| 175 | 
< | 
                system "rad2mgf $radscn >> $mgfscn"; | 
| 176 | 
< | 
        } | 
| 177 | 
< | 
        open(MGFSCN, ">> $mgfscn"); | 
| 178 | 
< | 
        print MGFSCN "xf\n"; | 
| 179 | 
< | 
        close MGFSCN; | 
| 180 | 
< | 
        $wrapper .= " -g $mgfscn"; | 
| 181 | 
< | 
} | 
| 182 | 
< | 
# Create receiver & sender surfaces (rectangular) | 
| 184 | 
> | 
$wrapper .= " -g $mgfscn" if ( $geout ); | 
| 185 | 
> | 
# Calculate CIE (u',v') from Radiance RGB: | 
| 186 | 
> | 
my $CIEuv =     'Xi=.5141*Ri+.3239*Gi+.1620*Bi;' . | 
| 187 | 
> | 
                'Yi=.2651*Ri+.6701*Gi+.0648*Bi;' . | 
| 188 | 
> | 
                'Zi=.0241*Ri+.1229*Gi+.8530*Bi;' . | 
| 189 | 
> | 
                'den=Xi+15*Yi+3*Zi;' . | 
| 190 | 
> | 
                'uprime=4*Xi/den;vprime=9*Yi/den;' ; | 
| 191 | 
  | 
my $FEPS = 1e-5; | 
| 192 | 
+ | 
my $ns = 2**$ttlog2; | 
| 193 | 
  | 
my $nx = int(sqrt($nsamp*($dim[1]-$dim[0])/($dim[3]-$dim[2])) + 1); | 
| 194 | 
  | 
my $ny = int($nsamp/$nx + 1); | 
| 195 | 
  | 
$nsamp = $nx * $ny; | 
| 187 | 
– | 
my $ns = 2**$ttlog2; | 
| 188 | 
– | 
open(RADSCN, "> $receivers"); | 
| 189 | 
– | 
print RADSCN '#@rfluxmtx ' . ($tensortree ? "h=-sc$ns\n" : "h=-kf\n"); | 
| 190 | 
– | 
print RADSCN '#@rfluxmtx ' . "u=-Y o=$facedat\n\n"; | 
| 191 | 
– | 
print RADSCN "void glow receiver_face\n0\n0\n4 1 1 1 0\n\n"; | 
| 192 | 
– | 
print RADSCN "receiver_face source f_receiver\n0\n0\n4 0 0 1 180\n\n"; | 
| 193 | 
– | 
print RADSCN '#@rfluxmtx ' . ($tensortree ? "h=+sc$ns\n" : "h=+kf\n"); | 
| 194 | 
– | 
print RADSCN '#@rfluxmtx ' . "u=-Y o=$behinddat\n\n"; | 
| 195 | 
– | 
print RADSCN "void glow receiver_behind\n0\n0\n4 1 1 1 0\n\n"; | 
| 196 | 
– | 
print RADSCN "receiver_behind source b_receiver\n0\n0\n4 0 0 -1 180\n"; | 
| 197 | 
– | 
close RADSCN; | 
| 198 | 
– | 
# Finish rfluxmtx command and prepare sender surfaces | 
| 196 | 
  | 
$rfluxmtx .= " -n $nproc -c $nsamp"; | 
| 197 | 
< | 
if ( $tensortree != 3 ) {       # Isotropic tensor tree is exception | 
| 198 | 
< | 
        open (RADSCN, "> $fsender"); | 
| 199 | 
< | 
        print RADSCN '#@rfluxmtx u=-Y ' . ($tensortree ? "h=-sc$ns\n\n" : "h=-kf\n\n"); | 
| 200 | 
< | 
        print RADSCN "void polygon fwd_sender\n0\n0\n12\n"; | 
| 201 | 
< | 
        printf RADSCN "\t%e\t%e\t%e\n", $dim[0], $dim[2], $dim[4]-$FEPS; | 
| 202 | 
< | 
        printf RADSCN "\t%e\t%e\t%e\n", $dim[0], $dim[3], $dim[4]-$FEPS; | 
| 203 | 
< | 
        printf RADSCN "\t%e\t%e\t%e\n", $dim[1], $dim[3], $dim[4]-$FEPS; | 
| 204 | 
< | 
        printf RADSCN "\t%e\t%e\t%e\n", $dim[1], $dim[2], $dim[4]-$FEPS; | 
| 197 | 
> | 
if ( !defined $recovery ) { | 
| 198 | 
> | 
        open(MYAVH, "> $td/savedARGV.txt"); | 
| 199 | 
> | 
        foreach (@savedARGV) { | 
| 200 | 
> | 
                print MYAVH "$_\n"; | 
| 201 | 
> | 
        } | 
| 202 | 
> | 
        close MYAVH; | 
| 203 | 
> | 
        # Generate octree | 
| 204 | 
> | 
        system "oconv -w $radscn > $octree"; | 
| 205 | 
> | 
        die "Could not compile scene\n" if ( $? ); | 
| 206 | 
> | 
        # Add MGF description if requested | 
| 207 | 
> | 
        if ( $geout ) { | 
| 208 | 
> | 
                open(MGFSCN, "> $mgfscn"); | 
| 209 | 
> | 
                printf MGFSCN "xf -t %.6f %.6f 0\n", -($dim[0]+$dim[1])/2, -($dim[2]+$dim[3])/2; | 
| 210 | 
> | 
                close MGFSCN; | 
| 211 | 
> | 
                if ( $mgfin ) { | 
| 212 | 
> | 
                        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}; | 
| 213 | 
> | 
                } else { | 
| 214 | 
> | 
                        system "rad2mgf $radscn >> $mgfscn"; | 
| 215 | 
> | 
                } | 
| 216 | 
> | 
                open(MGFSCN, ">> $mgfscn"); | 
| 217 | 
> | 
                print MGFSCN "xf\n"; | 
| 218 | 
> | 
                close MGFSCN; | 
| 219 | 
> | 
        } | 
| 220 | 
> | 
        # Create receiver & sender surfaces (rectangular) | 
| 221 | 
> | 
        open(RADSCN, "> $receivers"); | 
| 222 | 
> | 
        print RADSCN '#@rfluxmtx ' . ($tensortree ? "h=-sc$ns\n" : "h=-kf\n"); | 
| 223 | 
> | 
        print RADSCN '#@rfluxmtx ' . "u=-Y o=$facedat\n\n"; | 
| 224 | 
> | 
        print RADSCN "void glow receiver_face\n0\n0\n4 1 1 1 0\n\n"; | 
| 225 | 
> | 
        print RADSCN "receiver_face source f_receiver\n0\n0\n4 0 0 1 180\n\n"; | 
| 226 | 
> | 
        print RADSCN '#@rfluxmtx ' . ($tensortree ? "h=+sc$ns\n" : "h=+kf\n"); | 
| 227 | 
> | 
        print RADSCN '#@rfluxmtx ' . "u=-Y o=$behinddat\n\n"; | 
| 228 | 
> | 
        print RADSCN "void glow receiver_behind\n0\n0\n4 1 1 1 0\n\n"; | 
| 229 | 
> | 
        print RADSCN "receiver_behind source b_receiver\n0\n0\n4 0 0 -1 180\n"; | 
| 230 | 
  | 
        close RADSCN; | 
| 231 | 
< | 
        open (RADSCN, "> $bsender"); | 
| 232 | 
< | 
        print RADSCN '#@rfluxmtx u=-Y ' . ($tensortree ? "h=+sc$ns\n\n" : "h=+kf\n\n"); | 
| 233 | 
< | 
        print RADSCN "void polygon bwd_sender\n0\n0\n12\n"; | 
| 234 | 
< | 
        printf RADSCN "\t%e\t%e\t%e\n", $dim[0], $dim[2], $dim[5]+$FEPS; | 
| 235 | 
< | 
        printf RADSCN "\t%e\t%e\t%e\n", $dim[1], $dim[2], $dim[5]+$FEPS; | 
| 236 | 
< | 
        printf RADSCN "\t%e\t%e\t%e\n", $dim[1], $dim[3], $dim[5]+$FEPS; | 
| 237 | 
< | 
        printf RADSCN "\t%e\t%e\t%e\n", $dim[0], $dim[3], $dim[5]+$FEPS; | 
| 238 | 
< | 
        close RADSCN; | 
| 231 | 
> | 
        # Prepare sender surfaces | 
| 232 | 
> | 
        if ( $tensortree != 3 ) {       # Isotropic tensor tree is exception | 
| 233 | 
> | 
                open (RADSCN, "> $fsender"); | 
| 234 | 
> | 
                print RADSCN '#@rfluxmtx u=-Y ' . ($tensortree ? "h=-sc$ns\n\n" : "h=-kf\n\n"); | 
| 235 | 
> | 
                print RADSCN "void polygon fwd_sender\n0\n0\n12\n"; | 
| 236 | 
> | 
                printf RADSCN "\t%e\t%e\t%e\n", $dim[0], $dim[2], $dim[4]-$FEPS; | 
| 237 | 
> | 
                printf RADSCN "\t%e\t%e\t%e\n", $dim[0], $dim[3], $dim[4]-$FEPS; | 
| 238 | 
> | 
                printf RADSCN "\t%e\t%e\t%e\n", $dim[1], $dim[3], $dim[4]-$FEPS; | 
| 239 | 
> | 
                printf RADSCN "\t%e\t%e\t%e\n", $dim[1], $dim[2], $dim[4]-$FEPS; | 
| 240 | 
> | 
                close RADSCN; | 
| 241 | 
> | 
                open (RADSCN, "> $bsender"); | 
| 242 | 
> | 
                print RADSCN '#@rfluxmtx u=-Y ' . ($tensortree ? "h=+sc$ns\n\n" : "h=+kf\n\n"); | 
| 243 | 
> | 
                print RADSCN "void polygon bwd_sender\n0\n0\n12\n"; | 
| 244 | 
> | 
                printf RADSCN "\t%e\t%e\t%e\n", $dim[0], $dim[2], $dim[5]+$FEPS; | 
| 245 | 
> | 
                printf RADSCN "\t%e\t%e\t%e\n", $dim[1], $dim[2], $dim[5]+$FEPS; | 
| 246 | 
> | 
                printf RADSCN "\t%e\t%e\t%e\n", $dim[1], $dim[3], $dim[5]+$FEPS; | 
| 247 | 
> | 
                printf RADSCN "\t%e\t%e\t%e\n", $dim[0], $dim[3], $dim[5]+$FEPS; | 
| 248 | 
> | 
                close RADSCN; | 
| 249 | 
> | 
        } | 
| 250 | 
> | 
        print STDERR "Recover using: $0 -recover $td\n"; | 
| 251 | 
  | 
} | 
| 252 | 
< | 
# Calculate CIE (u',v') from Radiance RGB: | 
| 253 | 
< | 
my $CIEuv =     'Xi=.5141*Ri+.3239*Gi+.1620*Bi;' . | 
| 254 | 
< | 
                'Yi=.2651*Ri+.6701*Gi+.0648*Bi;' . | 
| 255 | 
< | 
                'Zi=.0241*Ri+.1229*Gi+.8530*Bi;' . | 
| 256 | 
< | 
                'den=Xi+15*Yi+3*Zi;' . | 
| 257 | 
< | 
                'uprime=4*Xi/den;vprime=9*Yi/den;' ; | 
| 252 | 
> | 
# Open unbuffered progress file | 
| 253 | 
> | 
open(MYPH, ">> $td/phase.txt"); | 
| 254 | 
> | 
{ | 
| 255 | 
> | 
        my $ofh = select MYPH; | 
| 256 | 
> | 
        $| = 1; | 
| 257 | 
> | 
        select $ofh; | 
| 258 | 
> | 
} | 
| 259 | 
> | 
$curphase = 0; | 
| 260 | 
  | 
# Create data segments (all the work happens here) | 
| 261 | 
  | 
if ( $tensortree ) { | 
| 262 | 
  | 
        do_tree_bsdf(); | 
| 270 | 
  | 
# Clean up temporary files and exit | 
| 271 | 
  | 
exec $rmtmp; | 
| 272 | 
  | 
 | 
| 273 | 
< | 
#-------------- End of main program segment --------------# | 
| 273 | 
> | 
#============== End of main program segment ==============# | 
| 274 | 
  | 
 | 
| 275 | 
+ | 
# Function to determine if next phase should be skipped or recovered | 
| 276 | 
+ | 
sub do_phase { | 
| 277 | 
+ | 
        $curphase++; | 
| 278 | 
+ | 
        if (defined $recovery) { | 
| 279 | 
+ | 
                if ($recovery > $curphase) { return 0; } | 
| 280 | 
+ | 
                if ($recovery == $curphase) { return -1; } | 
| 281 | 
+ | 
        } | 
| 282 | 
+ | 
        print MYPH "$curphase\n"; | 
| 283 | 
+ | 
        return 1; | 
| 284 | 
+ | 
} | 
| 285 | 
+ | 
 | 
| 286 | 
  | 
#++++++++++++++ Tensor tree BSDF generation ++++++++++++++# | 
| 287 | 
  | 
sub do_tree_bsdf { | 
| 288 | 
  | 
 | 
| 295 | 
  | 
# Call rfluxmtx and process tensor tree BSDF for the given direction | 
| 296 | 
  | 
sub do_ttree_dir { | 
| 297 | 
  | 
        my $forw = shift; | 
| 298 | 
+ | 
        my $r = do_phase(); | 
| 299 | 
+ | 
        if (!$r) { return; } | 
| 300 | 
+ | 
        $r = ($r < 0) ? " -r" : ""; | 
| 301 | 
  | 
        my $cmd; | 
| 302 | 
  | 
        if ( $tensortree == 3 ) { | 
| 303 | 
  | 
                # Isotropic BSDF | 
| 313 | 
  | 
                                qq{-e "zp=$dim[5-$forw]" -e "myDz=Dz*($forw*2-1)" } . | 
| 314 | 
  | 
                                qq{-e "\$1=xp-Dx;\$2=yp-Dy;\$3=zp-myDz" } . | 
| 315 | 
  | 
                                qq{-e "\$4=Dx;\$5=Dy;\$6=myDz" } . | 
| 316 | 
< | 
                                "| $rfluxmtx -fa -y $ns2 - $receivers -i $octree"; | 
| 316 | 
> | 
                                "| $rfluxmtx$r -fa -y $ns2 - $receivers -i $octree"; | 
| 317 | 
  | 
                } else { | 
| 318 | 
  | 
                        $cmd = "cnt $ns2 $ny $nx " . | 
| 319 | 
  | 
                                qq{| rcalc -e "r1=rand(.8681*recno-.673892)" } . | 
| 325 | 
  | 
                                qq{-e "zp=$dim[5-$forw]" -e "myDz=Dz*($forw*2-1)" } . | 
| 326 | 
  | 
                                qq{-e '\$1=xp-Dx;\$2=yp-Dy;\$3=zp-myDz' } . | 
| 327 | 
  | 
                                qq{-e '\$4=Dx;\$5=Dy;\$6=myDz' -of } . | 
| 328 | 
< | 
                                "| $rfluxmtx -h -ff -y $ns2 - $receivers -i $octree"; | 
| 328 | 
> | 
                                "| $rfluxmtx$r -h -ff -y $ns2 - $receivers -i $octree"; | 
| 329 | 
  | 
                } | 
| 330 | 
  | 
        } else { | 
| 331 | 
  | 
                # Anisotropic BSDF | 
| 332 | 
  | 
                my $sender = ($bsender,$fsender)[$forw]; | 
| 333 | 
  | 
                if ($windoz) { | 
| 334 | 
< | 
                        $cmd = "$rfluxmtx -fa $sender $receivers -i $octree"; | 
| 334 | 
> | 
                        $cmd = "$rfluxmtx$r -fa $sender $receivers -i $octree"; | 
| 335 | 
  | 
                } else { | 
| 336 | 
< | 
                        $cmd = "$rfluxmtx -h -ff $sender $receivers -i $octree"; | 
| 336 | 
> | 
                        $cmd = "$rfluxmtx$r -h -ff $sender $receivers -i $octree"; | 
| 337 | 
  | 
                } | 
| 338 | 
  | 
        } | 
| 339 | 
  | 
        # print STDERR "Starting: $cmd\n"; | 
| 464 | 
  | 
# Call rfluxmtx and process tensor tree BSDF for the given direction | 
| 465 | 
  | 
sub do_matrix_dir { | 
| 466 | 
  | 
        my $forw = shift; | 
| 467 | 
+ | 
        my $r = do_phase(); | 
| 468 | 
+ | 
        if (!$r) { return; } | 
| 469 | 
+ | 
        $r = ($r < 0) ? " -r" : ""; | 
| 470 | 
  | 
        my $cmd; | 
| 471 | 
  | 
        my $sender = ($bsender,$fsender)[$forw]; | 
| 472 | 
< | 
        $cmd = "$rfluxmtx -fd $sender $receivers -i $octree"; | 
| 472 | 
> | 
        $cmd = "$rfluxmtx$r -fd $sender $receivers -i $octree"; | 
| 473 | 
  | 
        # print STDERR "Starting: $cmd\n"; | 
| 474 | 
  | 
        system $cmd; | 
| 475 | 
  | 
        die "Failure running rfluxmtx" if ( $? ); |