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root/radiance/ray/src/util/genklemsamp.pl
Revision: 2.13
Committed: Sun Feb 28 00:28:36 2016 UTC (6 years, 7 months ago) by greg
Content type: text/plain
Branch: MAIN
CVS Tags: rad5R2, rad5R1, rad5R3, HEAD
Changes since 2.12: +2 -2 lines
Log Message:
Fix for git bash

File Contents

# Content
1 #!/usr/bin/perl -w
2 # RCSid $Id: genklemsamp.pl,v 2.12 2012/06/28 17:35:18 greg Exp $
3 #
4 # Sample Klems (full) directions impinging on surface(s)
5 #
6 # G. Ward
7 #
8 use strict;
9 my $windoz = ($^O eq "MSWin32" or $^O eq "MSWin64");
10 use File::Temp qw/ :mktemp /;
11 if ($#ARGV < 0) {
12 print STDERR "Usage: genklemsamp [-c N ][-f{a|f|d}] [view opts] [geom.rad ..]\n";
13 exit 1;
14 }
15 my $nsamp = 1000;
16 my $fmt = "a";
17 my @vopts="-vo 1e-5";
18 while ($#ARGV >= 0) {
19 if ("$ARGV[0]" eq "-c") {
20 shift @ARGV;
21 $nsamp = $ARGV[0];
22 } elsif ("$ARGV[0]" =~ /^-f[afd]$/) {
23 $fmt = substr($ARGV[0], 2, 1);
24 } elsif ("$ARGV[0]" =~ /^-v[pdu]$/) {
25 push @vopts, "@ARGV[0..3]";
26 shift @ARGV; shift @ARGV; shift @ARGV;
27 } elsif ("$ARGV[0]" =~ /^-v[fhvo]$/) {
28 push @vopts, "@ARGV[0..1]";
29 shift @ARGV;
30 } elsif ("$ARGV[0]" =~ /^-v./) {
31 print STDERR "Unsupported view option: $ARGV[0]\n";
32 exit 1;
33 } elsif ("$ARGV[0]" =~ /^-./) {
34 print STDERR "Unknown option: $ARGV[0]\n";
35 exit 1;
36 } else {
37 last;
38 }
39 shift @ARGV;
40 }
41 my $ofmt = "";
42 $ofmt = "-o$fmt" if ("$fmt" ne "a");
43 # Require parallel view and compile settings
44 push @vopts, "-vtl";
45 my $vwset = `vwright @vopts V`;
46 chomp $vwset;
47 $_ = $vwset; s/^.*Vhn://; s/;.*$//;
48 my $width = $_;
49 $_ = $vwset; s/^.*Vvn://; s/;.*$//;
50 my $height = $_;
51 my $sca = sqrt($nsamp/($width*$height));
52 # Kbin is input to get direction in full Klems basis with (x1,x2) randoms
53 my $tcal = 'DEGREE : PI/180;' .
54 'Kpola(r) : select(r+1, -5, 5, 15, 25, 35, 45, 55, 65, 75, 90);' .
55 'Knaz(r) : select(r, 1, 8, 16, 20, 24, 24, 24, 16, 12);' .
56 'Kaccum(r) : if(r-.5, Knaz(r) + Kaccum(r-1), 0);' .
57 'Kmax : Kaccum(Knaz(0));' .
58 'Kfindrow(r, rem) : if(rem-Knaz(r)-.5, Kfindrow(r+1, rem-Knaz(r)), r);' .
59 'Krow = if(Kbin-(Kmax+.5), 0, Kfindrow(1, Kbin));' .
60 'Kcol = Kbin - Kaccum(Krow-1) - 1;' .
61 'Kazi = 360*DEGREE * (Kcol + .5 - x2) / Knaz(Krow);' .
62 'Kpol = DEGREE * (x1*Kpola(Krow) + (1-x1)*Kpola(Krow-1));' .
63 'sin_kpol = sin(Kpol);' .
64 'K0 = cos(Kazi)*sin_kpol;' .
65 'K1 = sin(Kazi)*sin_kpol;' .
66 'K2 = sqrt(1 - sin_kpol*sin_kpol);' ;
67 my $ndiv = 145;
68 my ($td, $inchk, $rmtmp, $orgcnt);
69 if ($windoz) {
70 my $tmploc = `echo \%TMP\%`;
71 chomp($tmploc);
72 $td = mkdtemp("$tmploc\\genklemsamp.XXXXXX");
73 chomp $td;
74 $inchk = "rtrace -w -h -opLN $td\\surf.oct " .
75 q{| rcalc -e "cond=and(5e9-$4,nOK);$1=$1;$2=$2;$3=$3" } .
76 "-e \"and(a,b):if(a,b,a);sq(x):x*x\" -e \"$vwset\" " .
77 q{-e "nOK=sq(Vdx*$5+Vdy*$6+Vdz*$7)-.999" } .
78 " > $td\\origins.txt";
79 $rmtmp = "rd /S /Q $td";
80 } else {
81 $td = mkdtemp("/tmp/genklemsamp.XXXXXX");
82 chomp $td;
83 $inchk = "rtrace -w -h -faf -opLN $td/surf.oct " .
84 q{| rcalc -e 'cond=and(5e9-$4,nOK);$1=$1;$2=$2;$3=$3' } .
85 "-e 'and(a,b):if(a,b,a);sq(x):x*x' -e '$vwset' " .
86 q{-e 'nOK=sq(Vdx*$5+Vdy*$6+Vdz*$7)-.999' } .
87 "-if7 -of > $td/origins.flt";
88 $rmtmp = "rm -rf $td";
89 }
90 sub GetNOrigins {
91 if ($windoz) {
92 my $count = 0;
93 open(FILE, "< $td\\origins.txt");
94 $count++ while <FILE>;
95 close(FILE);
96 return $count;
97 }
98 return (-s "$td/origins.flt") / (4*3);
99 }
100 # Do we have any Radiance input files?
101 if ($#ARGV >= 0) {
102 system "xform -m void @ARGV | oconv - > $td/surf.oct";
103 # Set our own view center and size based on bounding cube
104 $_ = $vwset; s/^.*Vdx://; s/;.*$//;
105 my @vd = $_;
106 $_ = $vwset; s/^.*Vdy://; s/;.*$//;
107 push @vd, $_;
108 $_ = $vwset; s/^.*Vdz://; s/;.*$//;
109 push @vd, $_;
110 my @bcube = split ' ', `getinfo -d < $td/surf.oct`;
111 $width = $bcube[3]*sqrt(3);
112 $height = $width;
113 push @vopts, ("-vp", $bcube[0]+$bcube[3]/2-$width/2*$vd[0],
114 $bcube[1]+$bcube[3]/2-$width/2*$vd[1],
115 $bcube[2]+$bcube[3]/2-$width/2*$vd[2]);
116 push @vopts, ("-vh", $width, "-vv", $height);
117 $vwset = `vwright @vopts V`;
118 $sca = sqrt($nsamp/($width*$height));
119 my $xres;
120 my $yres;
121 my $ntot = 0;
122 # This generally passes through the loop twice to get density right
123 while ($ntot < $nsamp) {
124 $xres = int($width*$sca) + 1;
125 $yres = int($height*$sca) + 1;
126 system "vwrays -x $xres -y $yres -pa 0 -pj .7 @vopts | $inchk";
127 $ntot = GetNOrigins();
128 if ($ntot == 0) {
129 if ($nsamp < 200) {
130 $sca = sqrt(200/($width*$height));
131 redo;
132 }
133 print STDERR "View direction does not correspond to any surfaces\n";
134 exit 1;
135 }
136 $sca *= 1.05 * sqrt($nsamp/$ntot);
137 }
138 # All set to produce our samples
139 for (my $k = 1; $k <= $ndiv; $k++) {
140 my $rn = rand(10);
141 my $r1 = rand; my $r2 = rand;
142 # Chance of using = (number_still_needed)/(number_left_avail)
143 if ($windoz) {
144 system "rcalc $ofmt -e \"$tcal\" -e \"$vwset\" " .
145 "-e \"cond=($nsamp-outno+1)/($ntot-recno+1)-rand($rn+recno)\" " .
146 "-e \"Kbin=$k;x1=rand($r1+recno);x2=rand($r2+recno)\" " .
147 q{-e "$1=$1+Vo*Vdx; $2=$2+Vo*Vdy; $3=$3+Vo*Vdz" } .
148 q{-e "$4=-K0*Vhx-K1*Vvx+K2*Vdx" } .
149 q{-e "$5=-K0*Vhy-K1*Vvy+K2*Vdy" } .
150 q{-e "$6=-K0*Vhz-K1*Vvz+K2*Vdz" } .
151 "$td\\origins.txt";
152 } else {
153 system "rcalc $ofmt -e '$tcal' -e '$vwset' " .
154 "-e 'cond=($nsamp-outno+1)/($ntot-recno+1)-rand($rn+recno)' " .
155 "-e 'Kbin=$k;x1=rand($r1+recno);x2=rand($r2+recno)' " .
156 q{-e '$1=$1+Vo*Vdx; $2=$2+Vo*Vdy; $3=$3+Vo*Vdz' } .
157 q{-e '$4=-K0*Vhx-K1*Vvx+K2*Vdx' } .
158 q{-e '$5=-K0*Vhy-K1*Vvy+K2*Vdy' } .
159 q{-e '$6=-K0*Vhz-K1*Vvz+K2*Vdz' } .
160 "-if3 $td/origins.flt";
161 }
162 }
163 } else {
164 # No Radiance input files, so just sample over parallel view
165 my $xres = int($width*$sca) + 1;
166 my $yres = int($height*$sca) + 1;
167 my $ntot = $xres * $yres;
168 for (my $k = 1; $k <= $ndiv; $k++) {
169 my $rn = rand(10);
170 my $r1 = rand; my $r2 = rand;
171 my $r3 = rand; my $r4 = rand;
172 # Chance of using = (number_still_needed)/(number_left_avail)
173 if ($windoz) {
174 system "cnt $yres $xres | rcalc $ofmt -e \"$tcal\" -e \"$vwset\" " .
175 "-e \"xc=\$2;yc=\$1\" ".
176 "-e \"cond=($nsamp-outno+1)/($ntot-recno+1)-rand($rn+recno)\" " .
177 "-e \"Kbin=$k;x1=rand($r1+recno);x2=rand($r2+recno)\" " .
178 "-e \"hpos=Vhn*((xc+rand($r3+recno))/$xres - .5)\" " .
179 "-e \"vpos=Vvn*((yc+rand($r4+recno))/$yres - .5)\" " .
180 q{-e "$1=Vpx+Vo*Vdx+hpos*Vhx+vpos*Vvx" } .
181 q{-e "$2=Vpy+Vo*Vdy+hpos*Vhy+vpos*Vvy" } .
182 q{-e "$3=Vpz+Vo*Vdz+hpos*Vhz+vpos*Vvz" } .
183 q{-e "$4=-K0*Vhx-K1*Vvx+K2*Vdx" } .
184 q{-e "$5=-K0*Vhy-K1*Vvy+K2*Vdy" } .
185 q{-e "$6=-K0*Vhz-K1*Vvz+K2*Vdz" } ;
186 } else {
187 system "cnt $yres $xres | rcalc $ofmt -e '$tcal' -e '$vwset' " .
188 q{-e 'xc=$2;yc=$1' } .
189 "-e 'cond=($nsamp-outno+1)/($ntot-recno+1)-rand($rn+recno)' " .
190 "-e 'Kbin=$k;x1=rand($r1+recno);x2=rand($r2+recno)' " .
191 "-e 'hpos=Vhn*((xc+rand($r3+recno))/$xres - .5)' " .
192 "-e 'vpos=Vvn*((yc+rand($r4+recno))/$yres - .5)' " .
193 q{-e '$1=Vpx+Vo*Vdx+hpos*Vhx+vpos*Vvx' } .
194 q{-e '$2=Vpy+Vo*Vdy+hpos*Vhy+vpos*Vvy' } .
195 q{-e '$3=Vpz+Vo*Vdz+hpos*Vhz+vpos*Vvz' } .
196 q{-e '$4=-K0*Vhx-K1*Vvx+K2*Vdx' } .
197 q{-e '$5=-K0*Vhy-K1*Vvy+K2*Vdy' } .
198 q{-e '$6=-K0*Vhz-K1*Vvz+K2*Vdz' } ;
199 }
200 }
201 }
202 system $rmtmp;