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root/radiance/ray/src/util/genklemsamp.pl
Revision: 2.10
Committed: Sat Apr 16 00:39:07 2011 UTC (11 years, 7 months ago) by greg
Content type: text/plain
Branch: MAIN
Changes since 2.9: +3 -2 lines
Log Message:
Bug fix for 32-bit OS

File Contents

# User Rev Content
1 greg 2.1 #!/usr/bin/perl -w
2 greg 2.10 # RCSid $Id: genklemsamp.pl,v 2.9 2011/04/11 03:47:46 greg Exp $
3 greg 2.1 #
4     # Sample Klems (full) directions impinging on surface(s)
5     #
6 greg 2.2 # G. Ward
7     #
8 greg 2.3 use strict;
9 greg 2.10 use File::Temp qw/ :mktemp /;
10 greg 2.1 if ($#ARGV < 0) {
11 greg 2.4 print STDERR "Usage: genklemsamp [-c N ][-f{a|f|d}] [view opts] [geom.rad ..]\n";
12 greg 2.1 exit 1;
13     }
14 greg 2.10 my $td = mkdtemp("/tmp/genklemsamp.XXXXXX");
15 greg 2.1 chomp $td;
16     my $nsamp = 1000;
17     my $fmt = "a";
18     my @vopts="-vo 1e-5";
19     while ($#ARGV >= 0) {
20     if ("$ARGV[0]" eq "-c") {
21     shift @ARGV;
22     $nsamp = $ARGV[0];
23     } elsif ("$ARGV[0]" =~ /^-f[afd]$/) {
24     $fmt = substr($ARGV[0], 2, 1);
25     } elsif ("$ARGV[0]" =~ /^-v[pdu]$/) {
26     push @vopts, "@ARGV[0..3]";
27     shift @ARGV; shift @ARGV; shift @ARGV;
28     } elsif ("$ARGV[0]" =~ /^-v[fhvo]$/) {
29     push @vopts, "@ARGV[0..1]";
30     shift @ARGV;
31     } elsif ("$ARGV[0]" =~ /^-v./) {
32 greg 2.4 print STDERR "Unsupported view option: $ARGV[0]\n";
33 greg 2.1 exit 1;
34     } elsif ("$ARGV[0]" =~ /^-./) {
35 greg 2.4 print STDERR "Unknown option: $ARGV[0]\n";
36 greg 2.1 exit 1;
37     } else {
38     last;
39     }
40     shift @ARGV;
41     }
42     my $ofmt = "";
43     $ofmt = "-o$fmt" if ("$fmt" ne "a");
44     # Require parallel view and compile settings
45     push @vopts, "-vtl";
46     my $vwset = `vwright @vopts V`;
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 = '
54     DEGREE : PI/180;
55     Kpola(r) : select(r+1, -5, 5, 15, 25, 35, 45, 55, 65, 75, 90);
56     Knaz(r) : select(r, 1, 8, 16, 20, 24, 24, 24, 16, 12);
57     Kaccum(r) : if(r-.5, Knaz(r) + Kaccum(r-1), 0);
58     Kmax : Kaccum(Knaz(0));
59     Kfindrow(r, rem) : if(rem-Knaz(r)-.5, Kfindrow(r+1, rem-Knaz(r)), r);
60     Krow = if(Kbin-(Kmax+.5), 0, Kfindrow(1, Kbin));
61     Kcol = Kbin - Kaccum(Krow-1) - 1;
62     Kazi = 360*DEGREE * (Kcol + .5 - x2) / Knaz(Krow);
63     Kpol = DEGREE * (x1*Kpola(Krow) + (1-x1)*Kpola(Krow-1));
64     sin_kpol = sin(Kpol);
65     K0 = cos(Kazi)*sin_kpol;
66     K1 = sin(Kazi)*sin_kpol;
67 greg 2.5 K2 = sqrt(1 - sin_kpol*sin_kpol);
68 greg 2.1 ';
69     my $ndiv = 145;
70     # Do we have any Radiance input files?
71     if ($#ARGV >= 0) {
72     system "oconv -f @ARGV > $td/surf.oct";
73     # Set our own view center and size based on bounding cube
74     $_ = $vwset; s/^.*Vdx://; s/;.*$//;
75     my @vd = $_;
76     $_ = $vwset; s/^.*Vdy://; s/;.*$//;
77     push @vd, $_;
78     $_ = $vwset; s/^.*Vdz://; s/;.*$//;
79     push @vd, $_;
80 greg 2.8 my @bcube = split ' ', `getinfo -d < $td/surf.oct`;
81 greg 2.1 $width = $bcube[3]*sqrt(3);
82     $height = $width;
83     push @vopts, ("-vp", $bcube[0]+$bcube[3]/2-$width/2*$vd[0],
84     $bcube[1]+$bcube[3]/2-$width/2*$vd[1],
85     $bcube[2]+$bcube[3]/2-$width/2*$vd[2]);
86 greg 2.7 push @vopts, ("-vh", $width, "-vv", $height);
87 greg 2.1 $vwset = `vwright @vopts V`;
88 greg 2.6 $sca = sqrt($nsamp/($width*$height));
89 greg 2.1 my $xres;
90     my $yres;
91 greg 2.4 my $ntot = 0;
92 greg 2.1 # This generally passes through the loop twice to get density right
93 greg 2.4 while ($ntot < $nsamp) {
94 greg 2.1 $xres = int($width*$sca) + 1;
95     $yres = int($height*$sca) + 1;
96     system "vwrays -ff -x $xres -y $yres -pa 0 -pj .7 @vopts " .
97     "| rtrace -w -h -ff -opLN $td/surf.oct " .
98     q{| rcalc -e 'cond=and(5e9-$4,nOK);$1=$1;$2=$2;$3=$3' } .
99     "-e 'and(a,b):if(a,b,a);sq(x):x*x' -e '$vwset' " .
100     q{-e 'nOK=sq(Vdx*$5+Vdy*$6+Vdz*$7)-.999' } .
101     "-if7 -of > $td/origins.flt";
102     $ntot = -s "$td/origins.flt";
103 greg 2.7 $ntot /= 3*4; # number of bytes per sample position
104 greg 2.1 if ($ntot == 0) {
105 greg 2.6 if ($nsamp < 200) {
106 greg 2.4 $sca = sqrt(200/($width*$height));
107     redo;
108     }
109     print STDERR "View direction does not correspond to any surfaces\n";
110 greg 2.1 exit 1;
111     }
112     $sca *= 1.05 * sqrt($nsamp/$ntot);
113 greg 2.4 }
114 greg 2.1 # All set to produce our samples
115 greg 2.4 for (my $k = 1; $k <= $ndiv; $k++) {
116 greg 2.1 my $rn = rand(10);
117     my $r1 = rand; my $r2 = rand;
118     # Chance of using = (number_still_needed)/(number_left_avail)
119     system "rcalc $ofmt -e '$tcal' -e '$vwset' " .
120     "-e 'cond=($nsamp-outno+1)/($ntot-recno+1)-rand($rn+recno)' " .
121     "-e 'Kbin=$k;x1=rand($r1+recno);x2=rand($r2+recno)' " .
122     q{-e '$1=$1+Vo*Vdx; $2=$2+Vo*Vdy; $3=$3+Vo*Vdz' } .
123 greg 2.9 q{-e '$4=-K0*Vhx-K1*Vvx+K2*Vdx' } .
124     q{-e '$5=-K0*Vhy-K1*Vvy+K2*Vdy' } .
125     q{-e '$6=-K0*Vhz-K1*Vvz+K2*Vdz' } .
126 greg 2.1 "-if3 $td/origins.flt";
127     }
128     } else {
129     # No Radiance input files, so just sample over parallel view
130     my $xres = int($width*$sca) + 1;
131     my $yres = int($height*$sca) + 1;
132     my $ntot = $xres * $yres;
133 greg 2.4 for (my $k = 1; $k <= $ndiv; $k++) {
134 greg 2.1 my $rn = rand(10);
135     my $r1 = rand; my $r2 = rand;
136     my $r3 = rand; my $r4 = rand;
137     # Chance of using = (number_still_needed)/(number_left_avail)
138     system "cnt $yres $xres | rcalc $ofmt -e '$tcal' -e '$vwset' " .
139     q{-e 'xc=$2;yc=$1' } .
140     "-e 'cond=($nsamp-outno+1)/($ntot-recno+1)-rand($rn+recno)' " .
141     "-e 'Kbin=$k;x1=rand($r1+recno);x2=rand($r2+recno)' " .
142     "-e 'hpos=Vhn*((xc+rand($r3+recno))/$xres - .5)' " .
143     "-e 'vpos=Vvn*((yc+rand($r4+recno))/$yres - .5)' " .
144     q{-e '$1=Vpx+Vo*Vdx+hpos*Vhx+vpos*Vvx' } .
145     q{-e '$2=Vpy+Vo*Vdy+hpos*Vhy+vpos*Vvy' } .
146     q{-e '$3=Vpz+Vo*Vdz+hpos*Vhz+vpos*Vvz' } .
147 greg 2.9 q{-e '$4=-K0*Vhx-K1*Vvx+K2*Vdx' } .
148     q{-e '$5=-K0*Vhy-K1*Vvy+K2*Vdy' } .
149     q{-e '$6=-K0*Vhz-K1*Vvz+K2*Vdz' } ;
150 greg 2.1 }
151     }
152     system "rm -rf $td";