This file is indexed.

/usr/bin/genklemsamp is in radiance 4R1+20120125-1.1.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
#!/usr/bin/perl -w
# RCSid $Id: genklemsamp.pl,v 2.11 2011/05/16 23:56:32 greg Exp $
#
# Sample Klems (full) directions impinging on surface(s)
#
#	G. Ward
#
use strict;
my $windoz = ($^O eq "MSWin32" or $^O eq "MSWin64");
use File::Temp qw/ :mktemp  /;
if ($#ARGV < 0) {
	print STDERR "Usage: genklemsamp [-c N ][-f{a|f|d}] [view opts] [geom.rad ..]\n";
	exit 1;
}
my $nsamp = 1000;
my $fmt = "a";
my @vopts="-vo 1e-5";
while ($#ARGV >= 0) {
	if ("$ARGV[0]" eq "-c") {
		shift @ARGV;
		$nsamp = $ARGV[0];
	} elsif ("$ARGV[0]" =~ /^-f[afd]$/) {
		$fmt = substr($ARGV[0], 2, 1);
	} elsif ("$ARGV[0]" =~ /^-v[pdu]$/) {
		push @vopts, "@ARGV[0..3]";
		shift @ARGV; shift @ARGV; shift @ARGV;
	} elsif ("$ARGV[0]" =~ /^-v[fhvo]$/) {
		push @vopts, "@ARGV[0..1]";
		shift @ARGV;
	} elsif ("$ARGV[0]" =~ /^-v./) {
		print STDERR "Unsupported view option: $ARGV[0]\n";
		exit 1;
	} elsif ("$ARGV[0]" =~ /^-./) {
		print STDERR "Unknown option: $ARGV[0]\n";
		exit 1;
	} else {
		last;
	}
	shift @ARGV;
}
my $ofmt = "";
$ofmt = "-o$fmt" if ("$fmt" ne "a");
# Require parallel view and compile settings
push @vopts, "-vtl";
my $vwset = `vwright @vopts V`;
chomp $vwset;
$_ = $vwset; s/^.*Vhn://; s/;.*$//;
my $width = $_;
$_ = $vwset; s/^.*Vvn://; s/;.*$//;
my $height = $_;
my $sca = sqrt($nsamp/($width*$height));
# Kbin is input to get direction in full Klems basis with (x1,x2) randoms
my $tcal = 'DEGREE : PI/180;' .
	'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) - 1;' .
	'Kazi = 360*DEGREE * (Kcol + .5 - x2) / Knaz(Krow);' .
	'Kpol = DEGREE * (x1*Kpola(Krow) + (1-x1)*Kpola(Krow-1));' .
	'sin_kpol = sin(Kpol);' .
	'K0 = cos(Kazi)*sin_kpol;' .
	'K1 = sin(Kazi)*sin_kpol;' .
	'K2 = sqrt(1 - sin_kpol*sin_kpol);' ;
my $ndiv = 145;
my ($td, $inchk, $rmtmp, $orgcnt);
if ($windoz) {
	my $tmploc = `echo \%TMP\%`;
	chomp($tmploc);
	$td = mkdtemp("$tmploc\\genklemsamp.XXXXXX");
	chomp $td;
	$inchk = "rtrace -w -h -opLN $td\\surf.oct " .
			q{| rcalc -e "cond=and(5e9-$4,nOK);$1=$1;$2=$2;$3=$3" } .
			"-e \"and(a,b):if(a,b,a);sq(x):x*x\" -e \"$vwset\" " .
			q{-e "nOK=sq(Vdx*$5+Vdy*$6+Vdz*$7)-.999" } .
			" > $td\\origins.txt";
	$rmtmp = "rmdir /S /Q $td";
} else {
	$td = mkdtemp("/tmp/genklemsamp.XXXXXX");
	chomp $td;
	$inchk = "rtrace -w -h -faf -opLN $td/surf.oct " .
			q{| rcalc -e 'cond=and(5e9-$4,nOK);$1=$1;$2=$2;$3=$3' } .
			"-e 'and(a,b):if(a,b,a);sq(x):x*x' -e '$vwset' " .
			q{-e 'nOK=sq(Vdx*$5+Vdy*$6+Vdz*$7)-.999' } .
			"-if7 -of > $td/origins.flt";
	$rmtmp = "rm -rf $td";
}
sub GetNOrigins {
	if ($windoz) {
		my $count = 0;
		open(FILE, "< $td\\origins.txt");
		$count++ while <FILE>;
		close(FILE);
		return $count;
	}
	return (-s "$td/origins.flt") / (4*3);
}
# Do we have any Radiance input files?
if ($#ARGV >= 0) {
	system "oconv -f @ARGV > $td/surf.oct";
	# Set our own view center and size based on bounding cube
	$_ = $vwset; s/^.*Vdx://; s/;.*$//;
	my @vd = $_;
	$_ = $vwset; s/^.*Vdy://; s/;.*$//;
	push @vd, $_;
	$_ = $vwset; s/^.*Vdz://; s/;.*$//;
	push @vd, $_;
	my @bcube = split ' ', `getinfo -d < $td/surf.oct`;
	$width = $bcube[3]*sqrt(3);
	$height = $width;
	push @vopts, ("-vp", $bcube[0]+$bcube[3]/2-$width/2*$vd[0],
			$bcube[1]+$bcube[3]/2-$width/2*$vd[1],
			$bcube[2]+$bcube[3]/2-$width/2*$vd[2]);
	push @vopts, ("-vh", $width, "-vv", $height);
	$vwset = `vwright @vopts V`;
	$sca = sqrt($nsamp/($width*$height));
	my $xres;
	my $yres;
	my $ntot = 0;
	# This generally passes through the loop twice to get density right
	while ($ntot < $nsamp) {
		$xres = int($width*$sca) + 1;
		$yres = int($height*$sca) + 1;
		system "vwrays -x $xres -y $yres -pa 0 -pj .7 @vopts | $inchk";
		$ntot = GetNOrigins();
		if ($ntot == 0) {
			if ($nsamp < 200) {
				$sca = sqrt(200/($width*$height));
				redo;
			}
			print STDERR "View direction does not correspond to any surfaces\n";
			exit 1;
		}
		$sca *= 1.05 * sqrt($nsamp/$ntot);
	}
	# All set to produce our samples
	for (my $k = 1; $k <= $ndiv; $k++) {
		my $rn = rand(10);
		my $r1 = rand; my $r2 = rand;
		# Chance of using = (number_still_needed)/(number_left_avail)
		if ($windoz) {
			system "rcalc $ofmt -e \"$tcal\" -e \"$vwset\" " .
			"-e \"cond=($nsamp-outno+1)/($ntot-recno+1)-rand($rn+recno)\" " .
			"-e \"Kbin=$k;x1=rand($r1+recno);x2=rand($r2+recno)\" " .
			q{-e "$1=$1+Vo*Vdx; $2=$2+Vo*Vdy; $3=$3+Vo*Vdz" } .
			q{-e "$4=-K0*Vhx-K1*Vvx+K2*Vdx" } .
			q{-e "$5=-K0*Vhy-K1*Vvy+K2*Vdy" } .
			q{-e "$6=-K0*Vhz-K1*Vvz+K2*Vdz" } .
			"$td\\origins.txt";
		} else {
			system "rcalc $ofmt -e '$tcal' -e '$vwset' " .
			"-e 'cond=($nsamp-outno+1)/($ntot-recno+1)-rand($rn+recno)' " .
			"-e 'Kbin=$k;x1=rand($r1+recno);x2=rand($r2+recno)' " .
			q{-e '$1=$1+Vo*Vdx; $2=$2+Vo*Vdy; $3=$3+Vo*Vdz' } .
			q{-e '$4=-K0*Vhx-K1*Vvx+K2*Vdx' } .
			q{-e '$5=-K0*Vhy-K1*Vvy+K2*Vdy' } .
			q{-e '$6=-K0*Vhz-K1*Vvz+K2*Vdz' } .
			"-if3 $td/origins.flt";
		}
	}
} else {
	# No Radiance input files, so just sample over parallel view
	my $xres = int($width*$sca) + 1;
	my $yres = int($height*$sca) + 1;
	my $ntot = $xres * $yres;
	for (my $k = 1; $k <= $ndiv; $k++) {
		my $rn = rand(10);
		my $r1 = rand; my $r2 = rand;
		my $r3 = rand; my $r4 = rand;
		# Chance of using = (number_still_needed)/(number_left_avail)
		if ($windoz) {
			system "cnt $yres $xres | rcalc $ofmt -e \"$tcal\" -e \"$vwset\" " .
			"-e \"xc=\$2;yc=\$1\" ".
			"-e \"cond=($nsamp-outno+1)/($ntot-recno+1)-rand($rn+recno)\" " .
			"-e \"Kbin=$k;x1=rand($r1+recno);x2=rand($r2+recno)\" " .
			"-e \"hpos=Vhn*((xc+rand($r3+recno))/$xres - .5)\" " .
			"-e \"vpos=Vvn*((yc+rand($r4+recno))/$yres - .5)\" " .
			q{-e "$1=Vpx+Vo*Vdx+hpos*Vhx+vpos*Vvx" } .
			q{-e "$2=Vpy+Vo*Vdy+hpos*Vhy+vpos*Vvy" } .
			q{-e "$3=Vpz+Vo*Vdz+hpos*Vhz+vpos*Vvz" } .
			q{-e "$4=-K0*Vhx-K1*Vvx+K2*Vdx" } .
			q{-e "$5=-K0*Vhy-K1*Vvy+K2*Vdy" } .
			q{-e "$6=-K0*Vhz-K1*Vvz+K2*Vdz" } ;
		} else {
			system "cnt $yres $xres | rcalc $ofmt -e '$tcal' -e '$vwset' " .
			q{-e 'xc=$2;yc=$1' } .
			"-e 'cond=($nsamp-outno+1)/($ntot-recno+1)-rand($rn+recno)' " .
			"-e 'Kbin=$k;x1=rand($r1+recno);x2=rand($r2+recno)' " .
			"-e 'hpos=Vhn*((xc+rand($r3+recno))/$xres - .5)' " .
			"-e 'vpos=Vvn*((yc+rand($r4+recno))/$yres - .5)' " .
			q{-e '$1=Vpx+Vo*Vdx+hpos*Vhx+vpos*Vvx' } .
			q{-e '$2=Vpy+Vo*Vdy+hpos*Vhy+vpos*Vvy' } .
			q{-e '$3=Vpz+Vo*Vdz+hpos*Vhz+vpos*Vvz' } .
			q{-e '$4=-K0*Vhx-K1*Vvx+K2*Vdx' } .
			q{-e '$5=-K0*Vhy-K1*Vvy+K2*Vdy' } .
			q{-e '$6=-K0*Vhz-K1*Vvz+K2*Vdz' } ;
		}
	}
}
system $rmtmp;