ViewVC Help
View File | Revision Log | Show Annotations | Download File | Root Listing
root/radiance/ray/src/util/genskyvec.pl
Revision: 2.11
Committed: Tue Jun 5 01:25:11 2018 UTC (4 years, 5 months ago) by greg
Content type: text/plain
Branch: MAIN
CVS Tags: rad5R2, rad5R3, HEAD
Changes since 2.10: +23 -14 lines
Log Message:
Taoning added (secret) '-5' option for 5-phase calculation

File Contents

# User Rev Content
1 greg 2.1 #!/usr/bin/perl -w
2 greg 2.11 # RCSid $Id: genskyvec.pl,v 2.10 2016/12/12 17:40:07 greg Exp $
3 greg 2.1 #
4     # Generate Reinhart vector for a given sky description
5     #
6     # G. Ward
7     #
8     use strict;
9 greg 2.6 my $windoz = ($^O eq "MSWin32" or $^O eq "MSWin64");
10 greg 2.1 my @skycolor = (0.960, 1.004, 1.118);
11 greg 2.3 my $mf = 4;
12 greg 2.8 my $dosky = 1;
13 greg 2.11 my $dofive = 0;
14 greg 2.9 my $headout = 1;
15     my @origARGV = @ARGV;
16 greg 2.1 while ($#ARGV >= 0) {
17     if ("$ARGV[0]" eq "-c") {
18     @skycolor = @ARGV[1..3];
19 greg 2.8 shift @ARGV for (1..3);
20 greg 2.3 } elsif ("$ARGV[0]" eq "-m") {
21     $mf = $ARGV[1];
22     shift @ARGV;
23 greg 2.8 } elsif ("$ARGV[0]" eq "-d") {
24     $dosky = 0;
25 greg 2.11 } elsif ("$ARGV[0]" eq "-5") {
26     $dofive = 1;
27 greg 2.9 } elsif ("$ARGV[0]" eq "-h") {
28     $headout = 0;
29 greg 2.10 } else {
30     die "Unexpected command-line argument: $ARGV[0]\n";
31 greg 2.1 }
32     shift @ARGV;
33     }
34     # Load sky description into line array, separating sun if one
35     my @skydesc;
36     my $lightline;
37     my @sunval;
38     my $sunline;
39     my $skyOK = 0;
40     my $srcmod; # putting this inside loop breaks code(?!)
41     while (<>) {
42     push @skydesc, $_;
43     if (/^\w+\s+light\s+/) {
44     s/\s*$//; s/^.*\s//;
45     $srcmod = $_;
46     $lightline = $#skydesc;
47     } elsif (defined($srcmod) && /^($srcmod)\s+source\s/) {
48 greg 2.5 @sunval = split(' ', $skydesc[$lightline + 3]);
49 greg 2.1 shift @sunval;
50     $sunline = $#skydesc;
51     } elsif (/\sskyfunc\s*$/) {
52     $skyOK = 1;
53     }
54     }
55     die "Bad sky description!\n" if (! $skyOK);
56     # Strip out the solar source if present
57     my @sundir;
58     if (defined $sunline) {
59 greg 2.5 @sundir = split(' ', $skydesc[$sunline + 3]);
60 greg 2.1 shift @sundir;
61     undef @sundir if ($sundir[2] <= 0);
62     splice(@skydesc, $sunline, 5);
63     }
64     # Reinhart sky sample generator
65 greg 2.6 my $rhcal = 'DEGREE : PI/180;' .
66     'x1 = .5; x2 = .5;' .
67     'alpha : 90/(MF*7 + .5);' .
68     'tnaz(r) : select(r, 30, 30, 24, 24, 18, 12, 6);' .
69     'rnaz(r) : if(r-(7*MF-.5), 1, MF*tnaz(floor((r+.5)/MF) + 1));' .
70     'raccum(r) : if(r-.5, rnaz(r-1) + raccum(r-1), 0);' .
71     'RowMax : 7*MF + 1;' .
72     'Rmax : raccum(RowMax);' .
73     'Rfindrow(r, rem) : if(rem-rnaz(r)-.5, Rfindrow(r+1, rem-rnaz(r)), r);' .
74     'Rrow = if(Rbin-(Rmax-.5), RowMax-1, Rfindrow(0, Rbin));' .
75     'Rcol = Rbin - raccum(Rrow) - 1;' .
76     'Razi_width = 2*PI / rnaz(Rrow);' .
77     'RAH : alpha*DEGREE;' .
78     'Razi = if(Rbin-.5, (Rcol + x2 - .5)*Razi_width, 2*PI*x2);' .
79     'Ralt = if(Rbin-.5, (Rrow + x1)*RAH, asin(-x1));' .
80     'Romega = if(.5-Rbin, 2*PI, if(Rmax-.5-Rbin, ' .
81     ' Razi_width*(sin(RAH*(Rrow+1)) - sin(RAH*Rrow)),' .
82     ' 2*PI*(1 - cos(RAH/2)) ) );' .
83     'cos_ralt = cos(Ralt);' .
84     'Dx = sin(Razi)*cos_ralt;' .
85     'Dy = cos(Razi)*cos_ralt;' .
86     'Dz = sin(Ralt);' ;
87     my ($nbins, $octree, $tregcommand, $suncmd);
88     if ($windoz) {
89     $nbins = `rcalc -n -e MF:$mf -e \"$rhcal\" -e \"\$1=Rmax+1\"`;
90     chomp $nbins;
91     $octree = "gtv$$.oct";
92     $tregcommand = "cnt $nbins 16 | rcalc -e MF:$mf -e \"$rhcal\" " .
93     q{-e "Rbin=$1;x1=rand(recno*.37-5.3);x2=rand(recno*-1.47+.86)" } .
94     q{-e "$1=0;$2=0;$3=0;$4=Dx;$5=Dy;$6=Dz" } .
95     "| rtrace -h -ab 0 -w $octree | total -16 -m";
96 greg 2.7 if (@sundir) {
97     $suncmd = "cnt " . ($nbins-1) .
98     " | rcalc -e MF:$mf -e \"$rhcal\" -e Rbin=recno " .
99     "-e \"dot=Dx*$sundir[0] + Dy*$sundir[1] + Dz*$sundir[2]\" " .
100     "-e \"cond=dot-.866\" " .
101     q{-e "$1=if(1-dot,acos(dot),0);$2=Romega;$3=recno" };
102     }
103 greg 2.6 } else {
104     $nbins = `rcalc -n -e MF:$mf -e \'$rhcal\' -e \'\$1=Rmax+1\'`;
105     chomp $nbins;
106     $octree = "/tmp/gtv$$.oct";
107     $tregcommand = "cnt $nbins 16 | rcalc -of -e MF:$mf -e '$rhcal' " .
108     q{-e 'Rbin=$1;x1=rand(recno*.37-5.3);x2=rand(recno*-1.47+.86)' } .
109     q{-e '$1=0;$2=0;$3=0;$4=Dx;$5=Dy;$6=Dz' } .
110     "| rtrace -h -ff -ab 0 -w $octree | total -if3 -16 -m";
111 greg 2.7 if (@sundir) {
112     $suncmd = "cnt " . ($nbins-1) .
113     " | rcalc -e MF:$mf -e '$rhcal' -e Rbin=recno " .
114     "-e 'dot=Dx*$sundir[0] + Dy*$sundir[1] + Dz*$sundir[2]' " .
115     "-e 'cond=dot-.866' " .
116     q{-e '$1=if(1-dot,acos(dot),0);$2=Romega;$3=recno' };
117     }
118 greg 2.6 }
119 greg 2.8 my @tregval;
120     if ($dosky) {
121     # Create octree for rtrace
122     open OCONV, "| oconv - > $octree";
123     print OCONV @skydesc;
124     print OCONV "skyfunc glow skyglow 0 0 4 @skycolor 0\n";
125     print OCONV "skyglow source sky 0 0 4 0 0 1 360\n";
126     close OCONV;
127     # Run rtrace and average output for every 16 samples
128     @tregval = `$tregcommand`;
129     unlink $octree;
130     } else {
131     push @tregval, "0\t0\t0\n" for (1..$nbins);
132     }
133 greg 2.11 # Find closest patch(es) to sun and divvy up direct solar contribution
134 greg 2.6 sub numSort1 {
135     my @a1 = split("\t", $a);
136     my @b1 = split("\t", $b);
137     return ($a1[0] <=> $b1[0]);
138     }
139 greg 2.1 if (@sundir) {
140 greg 2.6 my @bestdir = `$suncmd`;
141     @bestdir = sort numSort1 @bestdir;
142 greg 2.11 if ($dofive) {
143     my ($ang, $dom, $ndx);
144     ($ang, $dom, $ndx) = split(' ', $bestdir[0]);
145     $tregval[$ndx] = "$sunval[0]\t$sunval[1]\t$sunval[2]\n";
146     } else {
147     my (@ang, @dom, @ndx);
148     my $somega = ($sundir[3]/360)**2 * 3.141592654**3;
149     my $wtot = 0;
150     for my $i (0..2) {
151     ($ang[$i], $dom[$i], $ndx[$i]) = split(' ', $bestdir[$i]);
152     $wtot += 1./($ang[$i]+.02);
153     }
154     for my $i (0..2) {
155     my $wt = 1./($ang[$i]+.02)/$wtot * $somega / $dom[$i];
156     my @scolor = split(' ', $tregval[$ndx[$i]]);
157     for my $j (0..2) { $scolor[$j] += $wt * $sunval[$j]; }
158     $tregval[$ndx[$i]] = "$scolor[0]\t$scolor[1]\t$scolor[2]\n";
159     }
160 greg 2.1 }
161     }
162 greg 2.9 # Output header if requested
163     if ($headout) {
164     print "#?RADIANCE\n";
165     print "genskyvec @origARGV\n";
166     print "NROWS=", $#tregval+1, "\n";
167     print "NCOLS=1\nNCOMP=3\n";
168     print "FORMAT=ascii\n";
169     print "\n";
170     }
171 greg 2.1 # Output our final vector
172     print @tregval;