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#!/usr/bin/perl |
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# |
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# Make an interactive preview of a luminaire |
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# |
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# This script is based on Radiance's objview.pl plus |
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# Rob Guglielmetti's ltview extension to his objview.rb |
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# |
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# Written by Axel Jacobs <[email protected]> |
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|
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use strict; |
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use warnings; |
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use Math::Trig; |
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use File::Copy qw(copy); |
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use File::Temp qw/ tempdir /; |
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|
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my $td = tempdir( CLEANUP => 1 ); |
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my $oct = "$td/ltview.oct"; |
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my $room = "$td/room.rad"; |
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my $box; # Overall box dimensions |
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my $default_box = 10; # Default box dimensions |
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my $rif = "$td/ltview.rif"; |
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my $lumi = "$td/lumi.rad"; # Fitting as given on cmd line, or generated by ies2rad |
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my $lumi2 = "$td/lumi2.rad"; # Fitting scaled to max unity |
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my $raddev = "x11"; # default output device. Overwrite with -o |
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my $is_ies = 0; # input file is IES photometry, not a Radiance luminaire |
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|
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my $maxscale = 1; # Maximum luminiare dimension after scaling |
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my $opts = ""; # Options common to rad and glrad |
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my $render = "-ab 1 -ds .15 -av 0 0 0"; # render= line in rif file |
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my $radopt = 0; # An option specific to rad was passed (Boolean). |
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|
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while (@ARGV) { |
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$_ = $ARGV[0]; |
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if (m/-i/) { |
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$is_ies = 1; |
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} elsif (m/-o/) { # output device (rvu -devices) |
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$raddev = $ARGV[1]; |
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$radopt = 1; |
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shift @ARGV; |
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} elsif (m/-b/) { |
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$box = $ARGV[1]; # Box dimensions |
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shift @ARGV; |
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} elsif (m/^-\w/) { |
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die("objview: Bad option: '$_'\n"); |
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} else { |
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last; |
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} |
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shift @ARGV; |
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} |
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|
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# We need exactly one Radiance luminaires or IES file |
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if (! $#ARGV == 0) { |
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die("ltview: Need one Radiance luminaire or IES file.\n"); |
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} |
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|
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if ($is_ies == 0) { |
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# Input file is a Radiance luminaire |
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$lumi = $ARGV[0]; |
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} else { |
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# Input file is IES photometry |
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system "ies2rad -p $td -o lumi $ARGV[0]"; |
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} |
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|
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|
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open(FH, ">$room") or |
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die("ltview: Can't write to temporary file '$room'\n"); |
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print FH "void plastic wall_mat 0 0 5 .2 .2 .2 0 0\n"; |
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|
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my $b2; |
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if (defined $box) { |
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# Room dimensions are giving explicitly. Don't touch the fitting. |
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$b2 = $box / 2; |
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|
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$lumi2 = $ARGV[0]; |
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} else { |
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# Scale fitting so it fits nicely into our default test room. |
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$b2 = $default_box; # Default room dimension |
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|
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# Work out how large the luminaire is and scale so that the longest |
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# axis-align dimension is $maxscale |
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my $dimstr = `getbbox -h $lumi`; |
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chomp $dimstr; |
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# Values returned by getbbox are indented and delimited with multiple spaces. |
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$dimstr =~ s/^\s+//; # remove leading spaces |
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my @dims = split(/\s+/, $dimstr); # convert to array |
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|
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# Find largest axes-aligned dimension |
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my @diffs = ($dims[1]-$dims[0], $dims[3]-$dims[2], $dims[5]-$dims[4]); |
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@diffs = reverse sort { $a <=> $b } @diffs; |
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my $size = $diffs[0]; |
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|
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# Move objects so centre is at origin |
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my $xtrans = -1.0 * ($dims[0] + $dims[1]) / 2; |
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my $ytrans = -1.0 * ($dims[2] + $dims[3]) / 2; |
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my $ztrans = -1.0 * ($dims[4] + $dims[5]) / 2; |
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# Scale so that largest object dimension is $maxscale |
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my $scale = $maxscale / $size; |
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|
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#system "xform -t $xtrans $ytrans $ztrans -s $scale $ARGV[0] > $lumi"; |
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system "xform -t $xtrans $ytrans $ztrans -s $scale $lumi > $lumi2"; |
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} |
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|
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print FH <<EndOfRoom; |
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# Don't generate -y face so we can look into the box (could use clipping) |
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#wall_mat polygon box.1540 0 0 12 $b2 -$b2 -$b2 $b2 -$b2 $b2 -$b2 -$b2 $b2 -$b2 -$b2 -$b2 |
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wall_mat polygon box.4620 0 0 12 -$b2 -$b2 $b2 -$b2 $b2 $b2 -$b2 $b2 -$b2 -$b2 -$b2 -$b2 |
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wall_mat polygon box.2310 0 0 12 -$b2 $b2 -$b2 $b2 $b2 -$b2 $b2 -$b2 -$b2 -$b2 -$b2 -$b2 |
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wall_mat polygon box.3267 0 0 12 $b2 $b2 -$b2 -$b2 $b2 -$b2 -$b2 $b2 $b2 $b2 $b2 $b2 |
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wall_mat polygon box.5137 0 0 12 $b2 -$b2 $b2 $b2 -$b2 -$b2 $b2 $b2 -$b2 $b2 $b2 $b2 |
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wall_mat polygon box.6457 0 0 12 -$b2 $b2 $b2 -$b2 -$b2 $b2 $b2 -$b2 $b2 $b2 $b2 $b2 |
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EndOfRoom |
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close(FH); |
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|
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my $scene = "$room $lumi"; |
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# Make this work under Windoze |
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if ( $^O =~ /MSWin32/ ) { |
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$scene =~ s{\\}{/}g; |
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$oct =~ s{\\}{/}g; |
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$raddev = "qt"; |
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} |
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|
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# Tweak bounding box so we get a nice view covering all of the box, without |
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# having a wasteful black border around it. Must work for arbitrary box dims. |
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my $zone = 1.1 * $b2 * ( 1 + 1/tan(22.5*pi/180) ); |
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|
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open(FH, ">$rif") or |
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die("ltview: Can't write to temporary file '$rif'\n"); |
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print FH <<EndOfRif; |
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scene= $scene |
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EXPOSURE= 2 |
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ZONE= Interior -$zone $zone -$zone $zone -$zone $zone |
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UP= Z |
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view= y |
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OCTREE= $oct |
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oconv= -f |
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render= $render |
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EndOfRif |
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close(FH); |
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|
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exec "rad -o $raddev $opts $rif"; |
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|
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#EOF |
