1 |
#!/usr/bin/perl |
2 |
|
3 |
# Make a four-view picture of the photometry of a luminaire |
4 |
# |
5 |
# This is inspired by objpict.pl that renders four-view |
6 |
# images of objects that are not light sources. |
7 |
# |
8 |
# Written by Axel Jacobs <[email protected]> |
9 |
|
10 |
use strict; |
11 |
use warnings; |
12 |
|
13 |
use File::Temp qw/ tempdir /; |
14 |
my $td = tempdir( CLEANUP => 1 ); |
15 |
|
16 |
my $res = 1024; # Default output image dimensions. Same as objpict. |
17 |
my $tiny = 0.01; |
18 |
my $maxsize = 0.001; # max luminaire size after scaling |
19 |
my $is_ies = 0; |
20 |
|
21 |
my $ies = "$td/dist.ies"; |
22 |
my $lumi = "$td/lumi.rad"; # Fitting given on cmd line, or generated by ies2rad |
23 |
my $lumi2 = "$td/lumi2.rad"; # Fitting scaled to size |
24 |
my $mat = "$td/lt.mat"; |
25 |
my $room1 = "$td/room1.rad"; |
26 |
my $room2 = "$td/room2.rad"; |
27 |
my $room3 = "$td/room3.rad"; |
28 |
my $room4 = "$td/room4.rad"; |
29 |
my $oct1 = "$td/lt1.oct"; |
30 |
my $oct2 = "$td/lt2.oct"; |
31 |
my $oct3 = "$td/lt3.oct"; |
32 |
my $oct4 = "$td/lt4.oct"; |
33 |
|
34 |
# Parse command line arguments |
35 |
while (@ARGV) { |
36 |
$_ = $ARGV[0]; |
37 |
if (m/-i/) { # File is an IES file, not a Radiance luminaire |
38 |
$is_ies = 1; |
39 |
} elsif (m/-d/) { # Resolution of the output HDR image |
40 |
$res = $ARGV[1]; |
41 |
shift @ARGV; |
42 |
} elsif (m/^-\w/) { # Oops! Illegal option |
43 |
die("ltpict: bad option '$_'\n"); |
44 |
} else { |
45 |
last; # No more options. What's left is the actual file name. |
46 |
} |
47 |
shift @ARGV; |
48 |
} |
49 |
|
50 |
if ($is_ies == 0) { |
51 |
# Input file is a Radiance luminaire |
52 |
$lumi = $ARGV[0]; |
53 |
} else { |
54 |
# Input file is IES photometry |
55 |
system "ies2rad -p $td -o lumi $ARGV[0]"; |
56 |
} |
57 |
|
58 |
my $res2 = $res / 2; # Each rendering is half the size of final composite |
59 |
|
60 |
# Scale luminaire and center at origin |
61 |
my $dimstr = `getbbox -h $lumi`; |
62 |
chomp $dimstr; |
63 |
# Values returned by getbbox are indented and delimited with multiple spaces. |
64 |
$dimstr =~ s/^\s+//; # remove leading spaces |
65 |
my @dims = split(/\s+/, $dimstr); # convert to array |
66 |
|
67 |
# Find largest axes-aligned dimension |
68 |
my @diffs = ($dims[1]-$dims[0], $dims[3]-$dims[2], $dims[5]-$dims[4]); |
69 |
@diffs = reverse sort { $a <=> $b } @diffs; |
70 |
my $size = $diffs[0]; |
71 |
|
72 |
# Move luminaire so centre is at origin, and scale |
73 |
my $xtrans = -1.0 * ($dims[0] + $dims[1]) / 2; |
74 |
my $ytrans = -1.0 * ($dims[2] + $dims[3]) / 2; |
75 |
my $ztrans = -1.0 * ($dims[4] + $dims[5]) / 2; |
76 |
my $scale = $maxsize / $size; |
77 |
|
78 |
open(FH, ">$lumi2") or |
79 |
die("ltpict: Cannot write to temporary file $lumi"); |
80 |
print FH "!xform -t $xtrans $ytrans $ztrans -s $scale $lumi"; |
81 |
close FH; |
82 |
|
83 |
|
84 |
# Material for the room |
85 |
open(FH, ">$mat") or |
86 |
die("ltpict: Cannot write to temporary file $mat"); |
87 |
print FH "void plastic wall_mat 0 0 5 .5 .5 .5 0 0"; |
88 |
close FH; |
89 |
|
90 |
|
91 |
# Different 'room' geometry for different views |
92 |
my $o = 0.1; # Offset |
93 |
|
94 |
# C0-C180 |
95 |
open(FH, ">$room1") or |
96 |
die("ltpict: Cannot write to temporary file $room1"); |
97 |
print FH "wall_mat polygon box.4620 0 0 12 -$o -5 5 -$o 5 5 -$o 5 -5 -$o -5 -5"; |
98 |
close(FH); |
99 |
|
100 |
# C90-C270 |
101 |
open(FH, ">$room2") or |
102 |
die("ltpict: Cannot write to temporary file $room2"); |
103 |
print FH "wall_mat polygon box.1540 0 0 12 5 $o -5 5 $o 5 -5 $o 5 -5 $o -5"; |
104 |
close(FH); |
105 |
|
106 |
# Lower hemisphere |
107 |
open(FH, ">$room3") or |
108 |
die("ltpict: Cannot write to temporary file $room3"); |
109 |
print FH "wall_mat bubble lower 0 0 4 0 0 $dims[4] 5"; |
110 |
close(FH); |
111 |
|
112 |
# Upper hemisphere |
113 |
open(FH, ">$room4") or |
114 |
die("ltpict: Cannot write to temporary file $room4"); |
115 |
print FH "wall_mat bubble upper 0 0 4 0 0 $dims[5] 5"; |
116 |
close(FH); |
117 |
|
118 |
|
119 |
# Call bbox again, for the translated and scaled luminaire. |
120 |
$dimstr = `getbbox -h $lumi2`; |
121 |
chomp $dimstr; |
122 |
# Values returned by getbbox are indented and delimited with multiple spaces. |
123 |
$dimstr =~ s/^\s+//; # remove leading spaces |
124 |
@dims = split(/\s+/, $dimstr); # convert to array |
125 |
|
126 |
# Define the four views |
127 |
my $vw1 = "-vtl -vp 4.5 0 0 -vd -1 0 0 -vh 10 -vv 10"; |
128 |
my $vw2 = "-vtl -vp 0 -4.5 0 -vd 0 1 0 -vh 10 -vv 10"; |
129 |
my $zcent3 = $dims[4] - $tiny; |
130 |
my $vw3 = "-vta -vp 0 0 $zcent3 -vd 0 0 -1 -vu 0 1 0 -vh 180 -vv 180"; |
131 |
my $zcent4 = $dims[5] + $tiny; |
132 |
my $vw4 = "-vta -vp 0 0 $zcent4 -vd 0 0 1 -vu 0 1 0 -vh 180 -vv 180"; |
133 |
|
134 |
system "oconv $mat $room1 $lumi2 > $oct1"; |
135 |
system "oconv $mat $room2 $lumi2 > $oct2"; |
136 |
system "oconv $mat $room3 $lumi2 > $oct3"; |
137 |
system "oconv $mat $room4 $lumi2 > $oct4"; |
138 |
|
139 |
# Render four different views of the objects |
140 |
my $rpict_cmd = "rpict -ab 0 -ds 0 -dv -av 0 0 0 -x $res2 -y $res2"; |
141 |
system "$rpict_cmd $vw1 $oct1 > $td/right.hdr"; |
142 |
system "$rpict_cmd $vw2 $oct2 > $td/front.hdr"; |
143 |
system "$rpict_cmd $vw3 $oct3 > $td/down.hdr"; |
144 |
system "$rpict_cmd $vw4 $oct4 > $td/up.hdr"; |
145 |
|
146 |
# Compose the four views into one image |
147 |
my $vtl = "$td/vtl.hdr"; # The two parallel views |
148 |
my $vta = "$td/vta.hdr"; # The two fisheye views |
149 |
|
150 |
# Auto-expose right/front and down/up pairs separately |
151 |
my $pcond_cmd = "pcond -l"; |
152 |
system "pcompos -a 2 $td/right.hdr $td/front.hdr > $td/rf.hdr"; |
153 |
system "$pcond_cmd $td/rf.hdr > $vtl"; |
154 |
system "pcompos -a 2 $td/down.hdr $td/up.hdr > $td/du.hdr"; |
155 |
system "$pcond_cmd $td/du.hdr > $vta"; |
156 |
|
157 |
# Combine top two images with bottom row. Output HDR. |
158 |
exec "pcompos -a 1 $vtl $vta"; |
159 |
|
160 |
#EOF |