| 1 |
greg |
2.1 |
#!/usr/bin/perl -w |
| 2 |
|
|
# RCSid $Id$ |
| 3 |
|
|
# |
| 4 |
|
|
# Generate Tregenza vector for a given sky description |
| 5 |
|
|
# |
| 6 |
|
|
# G. Ward |
| 7 |
|
|
# |
| 8 |
|
|
use strict; |
| 9 |
|
|
$ENV{RAYPATH} = ':/usr/local/lib/ray' if (! $ENV{RAYPATH}); |
| 10 |
|
|
my $tregsamp = "tregsamp.dat"; |
| 11 |
|
|
my @skycolor = (0.960, 1.004, 1.118); |
| 12 |
|
|
while ($#ARGV >= 0) { |
| 13 |
|
|
if ("$ARGV[0]" eq "-c") { |
| 14 |
|
|
@skycolor = @ARGV[1..3]; |
| 15 |
|
|
shift @ARGV; shift @ARGV; shift @ARGV; |
| 16 |
|
|
} |
| 17 |
|
|
shift @ARGV; |
| 18 |
|
|
} |
| 19 |
|
|
# Load sky description into line array, separating sun if one |
| 20 |
|
|
my @skydesc; |
| 21 |
|
|
my $lightline; |
| 22 |
|
|
my @sunval; |
| 23 |
|
|
my $sunline; |
| 24 |
|
|
while (<>) { |
| 25 |
|
|
my $srcmatch = '^WONTMATCHANYTHING$'; |
| 26 |
|
|
my $srcmod; |
| 27 |
|
|
push @skydesc, $_; |
| 28 |
|
|
if (/^\w+\s+light\s+/) { |
| 29 |
|
|
s/\s+$//; s/^.*\s//; |
| 30 |
|
|
$srcmod = $_; |
| 31 |
|
|
$lightline = $#skydesc; |
| 32 |
|
|
$srcmatch = "^$srcmod\\s+source\\s"; |
| 33 |
|
|
} elsif (/^solar\s+source\s/) { |
| 34 |
|
|
@sunval = split(/\s+/, $skydesc[$lightline + 3]); |
| 35 |
|
|
shift @sunval; |
| 36 |
|
|
$sunline = $#skydesc; |
| 37 |
|
|
} |
| 38 |
|
|
} |
| 39 |
|
|
die "Empty input!\n" if (! @skydesc); |
| 40 |
|
|
# Strip out the solar source if present |
| 41 |
|
|
my @sundir; |
| 42 |
|
|
if (defined $sunline) { |
| 43 |
|
|
@sundir = split(/\s+/, $skydesc[$sunline + 3]); |
| 44 |
|
|
shift @sundir; |
| 45 |
|
|
undef @sundir if ($sundir[2] <= 0); |
| 46 |
|
|
@skydesc[$sunline .. $sunline + 4] = ('', '', '', '', ''); |
| 47 |
|
|
} |
| 48 |
|
|
# Get Tregenza sample file |
| 49 |
|
|
my $found; |
| 50 |
|
|
foreach my $dir (split /:/, $ENV{RAYPATH}) { |
| 51 |
|
|
if (-r "$dir/$tregsamp") { |
| 52 |
|
|
$found = "$dir/$tregsamp"; |
| 53 |
|
|
last; |
| 54 |
|
|
} |
| 55 |
|
|
} |
| 56 |
|
|
if (! $found) { |
| 57 |
|
|
print STDERR "Cannot find file '$tregsamp'\n"; |
| 58 |
|
|
exit 1; |
| 59 |
|
|
} |
| 60 |
|
|
$tregsamp = $found; |
| 61 |
|
|
# Create octree for rtrace |
| 62 |
|
|
my $octree = "/tmp/gtv$$.oct"; |
| 63 |
|
|
open OCONV, "| oconv - > $octree"; |
| 64 |
|
|
print OCONV @skydesc; |
| 65 |
|
|
print OCONV "skyfunc glow skyglow 0 0 4 @skycolor 0\n"; |
| 66 |
|
|
print OCONV "skyglow source sky 0 0 4 0 0 1 360\n"; |
| 67 |
|
|
close OCONV; |
| 68 |
|
|
# Run rtrace and average output for every 64 samples |
| 69 |
|
|
my @tregval = `rtrace -h -faf -ab 0 -w < $tregsamp $octree | total -if3 -m -64`; |
| 70 |
|
|
if ($#tregval != 145) { |
| 71 |
|
|
print STDERR "Expected 9344 samples in $tregsamp -- found ", |
| 72 |
|
|
`wc -l < $tregsamp`, "\n"; |
| 73 |
|
|
exit 1; |
| 74 |
|
|
} |
| 75 |
|
|
unlink $octree; |
| 76 |
|
|
# Find closest patches to sun and divvy up direct solar contribution |
| 77 |
|
|
my @bestdir; |
| 78 |
|
|
if (@sundir) { |
| 79 |
|
|
my $somega = ($sundir[3]/360)^2 * 3.141592654^3; |
| 80 |
|
|
my @tindex = (30, 60, 84, 108, 126, 138, 144, 145); |
| 81 |
|
|
my @tomega = (0.0435449227, 0.0416418006, 0.0473984151, |
| 82 |
|
|
0.0406730411, 0.0428934136, 0.0445221864, |
| 83 |
|
|
0.0455168385, 0.0344199465); |
| 84 |
|
|
my $cmd = "total -m -64 < $tregsamp | tail +2 | rcalc " . |
| 85 |
|
|
q{-e 'Dx=$4;Dy=$5;Dz=$6' } . |
| 86 |
|
|
"-e 'dot=Dx*$sundir[0] + Dy*$sundir[1] + Dz*$sundir[2]' " . |
| 87 |
|
|
q{-e '$1=acos(dot);$2=recno' | sort -n}; |
| 88 |
|
|
@bestdir = `$cmd | head -3`; |
| 89 |
|
|
my @ang; my @ndx; |
| 90 |
|
|
($ang[0], $ndx[0], $ang[1], $ndx[1], $ang[2], $ndx[2]) = |
| 91 |
|
|
( split(/\s+/, $bestdir[0]), |
| 92 |
|
|
split(/\s+/, $bestdir[1]), |
| 93 |
|
|
split(/\s+/, $bestdir[2]) ); |
| 94 |
|
|
my $wtot = 1/($ang[0]+.02) + 1/($ang[1]+.02) + 1/($ang[2]+.02); |
| 95 |
|
|
for my $i (0..2) { |
| 96 |
|
|
my $ti = 0; |
| 97 |
|
|
while ($ndx[$i] > $tindex[$ti]) { $ti++ } |
| 98 |
|
|
my $wt = $wtot/($ang[$i]+.02) * $somega / $tomega[$ti]; |
| 99 |
|
|
my @scolor = split(/\s+/, $tregval[$ndx[$i]]); |
| 100 |
|
|
for my $j (0..2) { $scolor[$j] += $wt * $sunval[$j]; } |
| 101 |
|
|
$tregval[$ndx[$i]] = "@scolor\n"; |
| 102 |
|
|
} |
| 103 |
|
|
} |
| 104 |
|
|
print @tregval; |
