src/util/ltpict.pl

#!/usr/bin/perl

# Make a four-view picture of the photometry of a luminaire
#
# This is inspired by objpict.pl that renders four-view
# images of objects that are not light sources.
#
# Written by Axel Jacobs <[email protected]>

use strict;
use warnings;

use File::Temp qw/ tempdir /;
my $td = tempdir( CLEANUP => 1 );

my $res     = 1024;     # Default output image dimensions. Same as objpict.
my $tiny    = 0.01;
my $maxsize = 0.001;    # max luminaire size after scaling
my $is_ies  = 0;

my $ies   = "$td/dist.ies";
my $lumi  = "$td/lumi.rad";     # Fitting given on cmd line, or generated by ies2rad
my $lumi2 = "$td/lumi2.rad";    # Fitting scaled to size
my $mat   = "$td/lt.mat";
my $room1 = "$td/room1.rad";
my $room2 = "$td/room2.rad";
my $room3 = "$td/room3.rad";
my $room4 = "$td/room4.rad";
my $oct1  = "$td/lt1.oct";
my $oct2  = "$td/lt2.oct";
my $oct3  = "$td/lt3.oct";
my $oct4  = "$td/lt4.oct";

# Parse command line arguments
while (@ARGV) {
    $_ = $ARGV[0];
    if (m/-i/) {    # File is an IES file, not a Radiance luminaire
        $is_ies = 1;
    } elsif (m/-d/) {    # Resolution of the output HDR image
        $res = $ARGV[1];
        shift @ARGV;
    } elsif (m/^-\w/) {    # Oops! Illegal option
        die("ltpict: bad option '$_'\n");
    } else {
        last;    # No more options.  What's left is the actual file name.
    }
    shift @ARGV;
}

# We need exactly one Radiance luminaires or IES file
if ( !$#ARGV == 0 ) {
    die("ltpict: Need one Radiance luminaire or IES file.\n");
} elsif ( $is_ies == 0 ) {

    # Input file is a Radiance luminaire
    $lumi = $ARGV[0];
} else {

    # Input file is IES photometry
    system qq[ ies2rad -p $td -o lumi "$ARGV[0]" ];
}

my $res2 = $res / 2;    # Each rendering is half the size of final composite

# Scale luminaire and center at origin
my $dimstr = `getbbox -h "$lumi"`;
chomp $dimstr;

# Values returned by getbbox are indented and delimited with multiple spaces.
$dimstr =~ s/^\s+//;    # remove leading spaces
my @dims = split( /\s+/, $dimstr );    # convert to array

# Find largest axes-aligned dimension
my @diffs = ( $dims[1] - $dims[0], $dims[3] - $dims[2], $dims[5] - $dims[4] );
@diffs = reverse sort { $a <=> $b } @diffs;
my $size = $diffs[0];

# Move luminaire so centre is at origin, and scale
my $xtrans = -1.0 * ( $dims[0] + $dims[1] ) / 2;
my $ytrans = -1.0 * ( $dims[2] + $dims[3] ) / 2;
my $ztrans = -1.0 * ( $dims[4] + $dims[5] ) / 2;
my $scale  = $maxsize / $size;
system qq[ xform -t $xtrans $ytrans $ztrans "$lumi" > $lumi2 ];

# Material for the room
open( FH, ">$mat" )
  or die("ltpict: Cannot write to temporary file $mat");
print FH "void plastic wall_mat  0  0  5  .5 .5 .5  0 0";
close FH;

# Different 'room' geometry for different views
my $o = 0.1;    # Offset

# C0-C180
open( FH, ">$room1" )
  or die("ltpict: Cannot write to temporary file $room1");
print FH
  "wall_mat polygon box.4620  0  0  12  -$o -5 5  -$o 5 5  -$o 5 -5  -$o -5 -5";
close(FH);

# C90-C270
open( FH, ">$room2" )
  or die("ltpict: Cannot write to temporary file $room2");
print FH
  "wall_mat polygon box.1540  0  0  12  5 $o -5  5 $o 5  -5 $o 5  -5 $o -5";
close(FH);

# Lower hemisphere
open( FH, ">$room3" )
  or die("ltpict: Cannot write to temporary file $room3");
print FH "wall_mat bubble lower  0  0  4 0 0 $dims[4] 5";
close(FH);

# Upper hemisphere
open( FH, ">$room4" )
  or die("ltpict: Cannot write to temporary file $room4");
print FH "wall_mat bubble upper  0  0  4 0 0 $dims[5] 5";
close(FH);

# Call bbox again, for the translated and scaled luminaire.
$dimstr = `getbbox -h $lumi2`;
chomp $dimstr;

# Values returned by getbbox are indented and delimited with multiple spaces.
$dimstr =~ s/^\s+//;    # remove leading spaces
@dims = split( /\s+/, $dimstr );    # convert to array

# Define the four views
my $vw1    = "-vtl -vp 4.5 0 0 -vd -1 0 0 -vh 10 -vv 10";
my $vw2    = "-vtl -vp 0 -4.5 0 -vd 0 1 0 -vh 10 -vv 10";
my $zcent3 = $dims[4] - $tiny;
my $vw3    = "-vta -vp 0 0 $zcent3 -vd 0 0 -1 -vu 0 1 0 -vh 180 -vv 180";
my $zcent4 = $dims[5] + $tiny;
my $vw4    = "-vta -vp 0 0 $zcent4 -vd 0 0 1 -vu 0 1 0 -vh 180 -vv 180";

# Compile octrees
system "oconv $mat $room1 $lumi2 > $oct1";
system "oconv $mat $room2 $lumi2 > $oct2";
system "oconv $mat $room3 $lumi2 > $oct3";
system "oconv $mat $room4 $lumi2 > $oct4";

# Render four different views of the objects
my $rpict_cmd = "rpict -ab 0 -ds 0 -dv -av 0 0 0 -x $res2 -y $res2";
system "$rpict_cmd $vw1 $oct1 > $td/right.hdr";
system "$rpict_cmd $vw2 $oct2 > $td/front.hdr";
system "$rpict_cmd $vw3 $oct3 > $td/down.hdr";
system "$rpict_cmd $vw4 $oct4 > $td/up.hdr";

# Compose the four views into one image
my $vtl = "$td/vtl.hdr";    # The two parallel views
my $vta = "$td/vta.hdr";    # The two fisheye views

# Auto-expose right/front and down/up pairs separately
my $pcond_cmd = "pcond -l";
system "pcompos -a 2 $td/right.hdr  $td/front.hdr > $td/rf.hdr";
system "$pcond_cmd $td/rf.hdr > $vtl";
system "pcompos -a 2 $td/down.hdr $td/up.hdr > $td/du.hdr";
system "$pcond_cmd $td/du.hdr > $vta";

# Combine top two images with bottom row.  Output HDR.
exec "pcompos -a 1 $vtl $vta";

#EOF
Revision:	2.2
Committed:	Wed Apr 16 20:32:00 2014 UTC (10 years ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad5R4, rad5R2, rad4R2P2, rad5R0, rad5R1, rad4R2, rad4R2P1, rad5R3, HEAD
Changes since 2.1:	+58 -55 lines
Log Message:	Axel updates to ltview and ltpict
#	User	Rev	Content
1	greg	2.1	#!/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	greg	2.2	my $res = 1024; # Default output image dimensions. Same as objpict.
17	greg	2.1	my $tiny = 0.01;
18	greg	2.2	my $maxsize = 0.001; # max luminaire size after scaling
19	greg	2.1	my $is_ies = 0;
20
21			my $ies = "$td/dist.ies";
22	greg	2.2	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	greg	2.1	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	greg	2.2	$_ = $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 = $ARGV[1];
41			shift @ARGV;
42			} elsif (m/^-\w/) { # Oops! Illegal option
43	greg	2.1	die("ltpict: bad option '$_'\n");
44			} else {
45	greg	2.2	last; # No more options. What's left is the actual file name.
46			}
47	greg	2.1	shift @ARGV;
48			}
49
50	greg	2.2	# We need exactly one Radiance luminaires or IES file
51			if ( !$#ARGV == 0 ) {
52			die("ltpict: Need one Radiance luminaire or IES file.\n");
53			} elsif ( $is_ies == 0 ) {
54
55			# Input file is a Radiance luminaire
56			$lumi = $ARGV[0];
57	greg	2.1	} else {
58	greg	2.2
59			# Input file is IES photometry
60			system qq[ ies2rad -p $td -o lumi "$ARGV[0]" ];
61	greg	2.1	}
62
63			my $res2 = $res / 2; # Each rendering is half the size of final composite
64
65			# Scale luminaire and center at origin
66	greg	2.2	my $dimstr = `getbbox -h "$lumi"`;
67	greg	2.1	chomp $dimstr;
68	greg	2.2
69	greg	2.1	# Values returned by getbbox are indented and delimited with multiple spaces.
70	greg	2.2	$dimstr =~ s/^\s+//; # remove leading spaces
71			my @dims = split( /\s+/, $dimstr ); # convert to array
72	greg	2.1
73			# Find largest axes-aligned dimension
74	greg	2.2	my @diffs = ( $dims[1] - $dims[0], $dims[3] - $dims[2], $dims[5] - $dims[4] );
75	greg	2.1	@diffs = reverse sort { $a <=> $b } @diffs;
76			my $size = $diffs[0];
77
78			# Move luminaire so centre is at origin, and scale
79	greg	2.2	my $xtrans = -1.0 * ( $dims[0] + $dims[1] ) / 2;
80			my $ytrans = -1.0 * ( $dims[2] + $dims[3] ) / 2;
81			my $ztrans = -1.0 * ( $dims[4] + $dims[5] ) / 2;
82			my $scale = $maxsize / $size;
83			system qq[ xform -t $xtrans $ytrans $ztrans "$lumi" > $lumi2 ];
84	greg	2.1
85			# Material for the room
86	greg	2.2	open( FH, ">$mat" )
87			or die("ltpict: Cannot write to temporary file $mat");
88	greg	2.1	print FH "void plastic wall_mat 0 0 5 .5 .5 .5 0 0";
89			close FH;
90
91			# Different 'room' geometry for different views
92	greg	2.2	my $o = 0.1; # Offset
93	greg	2.1
94			# C0-C180
95	greg	2.2	open( FH, ">$room1" )
96			or die("ltpict: Cannot write to temporary file $room1");
97			print FH
98			"wall_mat polygon box.4620 0 0 12 -$o -5 5 -$o 5 5 -$o 5 -5 -$o -5 -5";
99	greg	2.1	close(FH);
100
101			# C90-C270
102	greg	2.2	open( FH, ">$room2" )
103			or die("ltpict: Cannot write to temporary file $room2");
104			print FH
105			"wall_mat polygon box.1540 0 0 12 5 $o -5 5 $o 5 -5 $o 5 -5 $o -5";
106	greg	2.1	close(FH);
107
108			# Lower hemisphere
109	greg	2.2	open( FH, ">$room3" )
110			or die("ltpict: Cannot write to temporary file $room3");
111	greg	2.1	print FH "wall_mat bubble lower 0 0 4 0 0 $dims[4] 5";
112			close(FH);
113
114			# Upper hemisphere
115	greg	2.2	open( FH, ">$room4" )
116			or die("ltpict: Cannot write to temporary file $room4");
117	greg	2.1	print FH "wall_mat bubble upper 0 0 4 0 0 $dims[5] 5";
118			close(FH);
119
120			# Call bbox again, for the translated and scaled luminaire.
121			$dimstr = `getbbox -h $lumi2`;
122			chomp $dimstr;
123	greg	2.2
124	greg	2.1	# Values returned by getbbox are indented and delimited with multiple spaces.
125	greg	2.2	$dimstr =~ s/^\s+//; # remove leading spaces
126			@dims = split( /\s+/, $dimstr ); # convert to array
127	greg	2.1
128			# Define the four views
129	greg	2.2	my $vw1 = "-vtl -vp 4.5 0 0 -vd -1 0 0 -vh 10 -vv 10";
130			my $vw2 = "-vtl -vp 0 -4.5 0 -vd 0 1 0 -vh 10 -vv 10";
131	greg	2.1	my $zcent3 = $dims[4] - $tiny;
132	greg	2.2	my $vw3 = "-vta -vp 0 0 $zcent3 -vd 0 0 -1 -vu 0 1 0 -vh 180 -vv 180";
133	greg	2.1	my $zcent4 = $dims[5] + $tiny;
134	greg	2.2	my $vw4 = "-vta -vp 0 0 $zcent4 -vd 0 0 1 -vu 0 1 0 -vh 180 -vv 180";
135	greg	2.1
136	greg	2.2	# Compile octrees
137	greg	2.1	system "oconv $mat $room1 $lumi2 > $oct1";
138			system "oconv $mat $room2 $lumi2 > $oct2";
139			system "oconv $mat $room3 $lumi2 > $oct3";
140			system "oconv $mat $room4 $lumi2 > $oct4";
141
142			# Render four different views of the objects
143			my $rpict_cmd = "rpict -ab 0 -ds 0 -dv -av 0 0 0 -x $res2 -y $res2";
144			system "$rpict_cmd $vw1 $oct1 > $td/right.hdr";
145			system "$rpict_cmd $vw2 $oct2 > $td/front.hdr";
146			system "$rpict_cmd $vw3 $oct3 > $td/down.hdr";
147			system "$rpict_cmd $vw4 $oct4 > $td/up.hdr";
148
149			# Compose the four views into one image
150	greg	2.2	my $vtl = "$td/vtl.hdr"; # The two parallel views
151			my $vta = "$td/vta.hdr"; # The two fisheye views
152	greg	2.1
153			# Auto-expose right/front and down/up pairs separately
154			my $pcond_cmd = "pcond -l";
155			system "pcompos -a 2 $td/right.hdr $td/front.hdr > $td/rf.hdr";
156			system "$pcond_cmd $td/rf.hdr > $vtl";
157			system "pcompos -a 2 $td/down.hdr $td/up.hdr > $td/du.hdr";
158			system "$pcond_cmd $td/du.hdr > $vta";
159
160			# Combine top two images with bottom row. Output HDR.
161			exec "pcompos -a 1 $vtl $vta";
162
163			#EOF