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root/radiance/ray/src/util/genskyvec.pl
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Comparing ray/src/util/genskyvec.pl (file contents):
Revision 2.3 by greg, Wed Dec 9 21:30:48 2009 UTC vs.
Revision 2.8 by greg, Thu Jun 28 20:48:03 2012 UTC

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

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