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, 3 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

# Content
1 #!/usr/bin/perl -w
2 # RCSid $Id: genskyvec.pl,v 2.10 2016/12/12 17:40:07 greg Exp $
3 #
4 # Generate Reinhart vector for a given sky description
5 #
6 # G. Ward
7 #
8 use strict;
9 my $windoz = ($^O eq "MSWin32" or $^O eq "MSWin64");
10 my @skycolor = (0.960, 1.004, 1.118);
11 my $mf = 4;
12 my $dosky = 1;
13 my $dofive = 0;
14 my $headout = 1;
15 my @origARGV = @ARGV;
16 while ($#ARGV >= 0) {
17 if ("$ARGV[0]" eq "-c") {
18 @skycolor = @ARGV[1..3];
19 shift @ARGV for (1..3);
20 } elsif ("$ARGV[0]" eq "-m") {
21 $mf = $ARGV[1];
22 shift @ARGV;
23 } elsif ("$ARGV[0]" eq "-d") {
24 $dosky = 0;
25 } elsif ("$ARGV[0]" eq "-5") {
26 $dofive = 1;
27 } elsif ("$ARGV[0]" eq "-h") {
28 $headout = 0;
29 } else {
30 die "Unexpected command-line argument: $ARGV[0]\n";
31 }
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 @sunval = split(' ', $skydesc[$lightline + 3]);
49 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 @sundir = split(' ', $skydesc[$sunline + 3]);
60 shift @sundir;
61 undef @sundir if ($sundir[2] <= 0);
62 splice(@skydesc, $sunline, 5);
63 }
64 # Reinhart sky sample generator
65 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$$.oct";
92 $tregcommand = "cnt $nbins 16 | rcalc -e MF:$mf -e \"$rhcal\" " .
93 q{-e "Rbin=$1;x1=rand(recno*.37-5.3);x2=rand(recno*-1.47+.86)" } .
94 q{-e "$1=0;$2=0;$3=0;$4=Dx;$5=Dy;$6=Dz" } .
95 "| rtrace -h -ab 0 -w $octree | total -16 -m";
96 if (@sundir) {
97 $suncmd = "cnt " . ($nbins-1) .
98 " | rcalc -e MF:$mf -e \"$rhcal\" -e Rbin=recno " .
99 "-e \"dot=Dx*$sundir[0] + Dy*$sundir[1] + Dz*$sundir[2]\" " .
100 "-e \"cond=dot-.866\" " .
101 q{-e "$1=if(1-dot,acos(dot),0);$2=Romega;$3=recno" };
102 }
103 } else {
104 $nbins = `rcalc -n -e MF:$mf -e \'$rhcal\' -e \'\$1=Rmax+1\'`;
105 chomp $nbins;
106 $octree = "/tmp/gtv$$.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 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;$3=recno' };
117 }
118 }
119 my @tregval;
120 if ($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 # Find closest patch(es) to sun and divvy up direct solar contribution
134 sub numSort1 {
135 my @a1 = split("\t", $a);
136 my @b1 = split("\t", $b);
137 return ($a1[0] <=> $b1[0]);
138 }
139 if (@sundir) {
140 my @bestdir = `$suncmd`;
141 @bestdir = sort numSort1 @bestdir;
142 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 }
161 }
162 # 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 # Output our final vector
172 print @tregval;