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root/radiance/ray/src/util/genskyvec.pl
Revision: 2.10
Committed: Mon Dec 12 17:40:07 2016 UTC (5 years, 11 months ago) by greg
Content type: text/plain
Branch: MAIN
CVS Tags: rad5R1
Changes since 2.9: +3 -1 lines
Log Message:
Added check for bad argument

File Contents

# Content
1 #!/usr/bin/perl -w
2 # RCSid $Id: genskyvec.pl,v 2.9 2014/09/17 22:40:49 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 $headout = 1;
14 my @origARGV = @ARGV;
15 while ($#ARGV >= 0) {
16 if ("$ARGV[0]" eq "-c") {
17 @skycolor = @ARGV[1..3];
18 shift @ARGV for (1..3);
19 } elsif ("$ARGV[0]" eq "-m") {
20 $mf = $ARGV[1];
21 shift @ARGV;
22 } elsif ("$ARGV[0]" eq "-d") {
23 $dosky = 0;
24 } elsif ("$ARGV[0]" eq "-h") {
25 $headout = 0;
26 } else {
27 die "Unexpected command-line argument: $ARGV[0]\n";
28 }
29 shift @ARGV;
30 }
31 # Load sky description into line array, separating sun if one
32 my @skydesc;
33 my $lightline;
34 my @sunval;
35 my $sunline;
36 my $skyOK = 0;
37 my $srcmod; # putting this inside loop breaks code(?!)
38 while (<>) {
39 push @skydesc, $_;
40 if (/^\w+\s+light\s+/) {
41 s/\s*$//; s/^.*\s//;
42 $srcmod = $_;
43 $lightline = $#skydesc;
44 } elsif (defined($srcmod) && /^($srcmod)\s+source\s/) {
45 @sunval = split(' ', $skydesc[$lightline + 3]);
46 shift @sunval;
47 $sunline = $#skydesc;
48 } elsif (/\sskyfunc\s*$/) {
49 $skyOK = 1;
50 }
51 }
52 die "Bad sky description!\n" if (! $skyOK);
53 # Strip out the solar source if present
54 my @sundir;
55 if (defined $sunline) {
56 @sundir = split(' ', $skydesc[$sunline + 3]);
57 shift @sundir;
58 undef @sundir if ($sundir[2] <= 0);
59 splice(@skydesc, $sunline, 5);
60 }
61 # Reinhart sky sample generator
62 my $rhcal = 'DEGREE : PI/180;' .
63 'x1 = .5; x2 = .5;' .
64 'alpha : 90/(MF*7 + .5);' .
65 'tnaz(r) : select(r, 30, 30, 24, 24, 18, 12, 6);' .
66 'rnaz(r) : if(r-(7*MF-.5), 1, MF*tnaz(floor((r+.5)/MF) + 1));' .
67 'raccum(r) : if(r-.5, rnaz(r-1) + raccum(r-1), 0);' .
68 'RowMax : 7*MF + 1;' .
69 'Rmax : raccum(RowMax);' .
70 'Rfindrow(r, rem) : if(rem-rnaz(r)-.5, Rfindrow(r+1, rem-rnaz(r)), r);' .
71 'Rrow = if(Rbin-(Rmax-.5), RowMax-1, Rfindrow(0, Rbin));' .
72 'Rcol = Rbin - raccum(Rrow) - 1;' .
73 'Razi_width = 2*PI / rnaz(Rrow);' .
74 'RAH : alpha*DEGREE;' .
75 'Razi = if(Rbin-.5, (Rcol + x2 - .5)*Razi_width, 2*PI*x2);' .
76 'Ralt = if(Rbin-.5, (Rrow + x1)*RAH, asin(-x1));' .
77 'Romega = if(.5-Rbin, 2*PI, if(Rmax-.5-Rbin, ' .
78 ' Razi_width*(sin(RAH*(Rrow+1)) - sin(RAH*Rrow)),' .
79 ' 2*PI*(1 - cos(RAH/2)) ) );' .
80 'cos_ralt = cos(Ralt);' .
81 'Dx = sin(Razi)*cos_ralt;' .
82 'Dy = cos(Razi)*cos_ralt;' .
83 'Dz = sin(Ralt);' ;
84 my ($nbins, $octree, $tregcommand, $suncmd);
85 if ($windoz) {
86 $nbins = `rcalc -n -e MF:$mf -e \"$rhcal\" -e \"\$1=Rmax+1\"`;
87 chomp $nbins;
88 $octree = "gtv$$.oct";
89 $tregcommand = "cnt $nbins 16 | rcalc -e MF:$mf -e \"$rhcal\" " .
90 q{-e "Rbin=$1;x1=rand(recno*.37-5.3);x2=rand(recno*-1.47+.86)" } .
91 q{-e "$1=0;$2=0;$3=0;$4=Dx;$5=Dy;$6=Dz" } .
92 "| rtrace -h -ab 0 -w $octree | total -16 -m";
93 if (@sundir) {
94 $suncmd = "cnt " . ($nbins-1) .
95 " | rcalc -e MF:$mf -e \"$rhcal\" -e Rbin=recno " .
96 "-e \"dot=Dx*$sundir[0] + Dy*$sundir[1] + Dz*$sundir[2]\" " .
97 "-e \"cond=dot-.866\" " .
98 q{-e "$1=if(1-dot,acos(dot),0);$2=Romega;$3=recno" };
99 }
100 } else {
101 $nbins = `rcalc -n -e MF:$mf -e \'$rhcal\' -e \'\$1=Rmax+1\'`;
102 chomp $nbins;
103 $octree = "/tmp/gtv$$.oct";
104 $tregcommand = "cnt $nbins 16 | rcalc -of -e MF:$mf -e '$rhcal' " .
105 q{-e 'Rbin=$1;x1=rand(recno*.37-5.3);x2=rand(recno*-1.47+.86)' } .
106 q{-e '$1=0;$2=0;$3=0;$4=Dx;$5=Dy;$6=Dz' } .
107 "| rtrace -h -ff -ab 0 -w $octree | total -if3 -16 -m";
108 if (@sundir) {
109 $suncmd = "cnt " . ($nbins-1) .
110 " | rcalc -e MF:$mf -e '$rhcal' -e Rbin=recno " .
111 "-e 'dot=Dx*$sundir[0] + Dy*$sundir[1] + Dz*$sundir[2]' " .
112 "-e 'cond=dot-.866' " .
113 q{-e '$1=if(1-dot,acos(dot),0);$2=Romega;$3=recno' };
114 }
115 }
116 my @tregval;
117 if ($dosky) {
118 # Create octree for rtrace
119 open OCONV, "| oconv - > $octree";
120 print OCONV @skydesc;
121 print OCONV "skyfunc glow skyglow 0 0 4 @skycolor 0\n";
122 print OCONV "skyglow source sky 0 0 4 0 0 1 360\n";
123 close OCONV;
124 # Run rtrace and average output for every 16 samples
125 @tregval = `$tregcommand`;
126 unlink $octree;
127 } else {
128 push @tregval, "0\t0\t0\n" for (1..$nbins);
129 }
130 # Find closest 3 patches to sun and divvy up direct solar contribution
131 sub numSort1 {
132 my @a1 = split("\t", $a);
133 my @b1 = split("\t", $b);
134 return ($a1[0] <=> $b1[0]);
135 }
136 if (@sundir) {
137 my $somega = ($sundir[3]/360)**2 * 3.141592654**3;
138 my @bestdir = `$suncmd`;
139 @bestdir = sort numSort1 @bestdir;
140 my (@ang, @dom, @ndx);
141 my $wtot = 0;
142 for my $i (0..2) {
143 ($ang[$i], $dom[$i], $ndx[$i]) = split(' ', $bestdir[$i]);
144 $wtot += 1./($ang[$i]+.02);
145 }
146 for my $i (0..2) {
147 my $wt = 1./($ang[$i]+.02)/$wtot * $somega / $dom[$i];
148 my @scolor = split(' ', $tregval[$ndx[$i]]);
149 for my $j (0..2) { $scolor[$j] += $wt * $sunval[$j]; }
150 $tregval[$ndx[$i]] = "$scolor[0]\t$scolor[1]\t$scolor[2]\n";
151 }
152 }
153 # Output header if requested
154 if ($headout) {
155 print "#?RADIANCE\n";
156 print "genskyvec @origARGV\n";
157 print "NROWS=", $#tregval+1, "\n";
158 print "NCOLS=1\nNCOMP=3\n";
159 print "FORMAT=ascii\n";
160 print "\n";
161 }
162 # Output our final vector
163 print @tregval;