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greg |
2.1 |
#!/usr/bin/perl -w
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# RCSid $Id$
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#
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# Visualize ambient positions and gradients
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#
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use strict;
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sub userror {
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print STDERR "Usage: genambpos [-l lvl][-s scale][-p][-d] scene.amb > ambloc.rad\n";
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exit 1;
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}
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my $lvlsel = -1;
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my $scale = 0.25;
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my $doposgrad = 0;
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my $dodirgrad = 0;
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my $savedARGV = "genambpos @ARGV";
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# Get options
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while ($#ARGV >= 0) {
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if ("$ARGV[0]" =~ /^-p/) {
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$doposgrad=1;
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} elsif ("$ARGV[0]" =~ /^-d/) {
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$dodirgrad=1;
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} elsif ("$ARGV[0]" =~ /^-l/) {
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$lvlsel = $ARGV[1];
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shift @ARGV;
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} elsif ("$ARGV[0]" =~ /^-s/) {
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$scale = $ARGV[1];
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shift @ARGV;
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} elsif ("$ARGV[0]" =~ /^-./) {
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userror();
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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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userror() if ($#ARGV != 0);
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my $cmd = "getinfo < $ARGV[0] " .
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q[| sed -n 's/^.* -aa \([.0-9][.0-9]*\) .*$/\1/p'];
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my $ambacc=`$cmd`;
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die "Missing -aa setting in header\n" if (! $ambacc );
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$scale *= $ambacc**.25;
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my $outfmt = '
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void glow posglow
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0
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0
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4 ${agr} ${agg} ${agb} 0
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posglow sphere position${recno}
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0
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0
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4 ${px} ${py} ${pz} ${psiz}
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posglow cone pgarrow${recno}
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0
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0
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8
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${ cx0 } ${ cy0 } ${ cz0 }
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${ cx1 } ${ cy1 } ${ cz1 }
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${ cr0 } 0
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';
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my $posgradfmt = '
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void brightfunc pgpat
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2 posfunc ambpos.cal
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0
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6 ${ px } ${ py } ${ pz } ${ pgx } ${ pgy } ${ pgz }
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pgpat glow pgval
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0
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0
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4 ${avr} ${avg} ${avb} 0
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void mixfunc pgeval
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4 pgval void ellipstencil ambpos.cal
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0
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9 ${ px } ${ py } ${ pz } ${ux/r0} ${uy/r0} ${uz/r0} ${vx/r1} ${vy/r1} ${vz/r1}
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pgeval polygon pgellipse${recno}
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0
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0
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12
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${ px1 } ${ py1 } ${ pz1 }
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${ px2 } ${ py2 } ${ pz2 }
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${ px3 } ${ py3 } ${ pz3 }
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${ px4 } ${ py4 } ${ pz4 }
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';
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$outfmt .= $posgradfmt if ($doposgrad);
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my $dirgradfmt='
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void glow tipglow
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0
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0
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4 ${2*agr} ${2*agg} ${2*agb} 0
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tipglow sphere atip
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0
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0
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4 ${ cx1 } ${ cy1 } ${ cz1 } ${psiz/7}
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void brightfunc dgpat
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2 dirfunc ambpos.cal
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0
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9 ${ px } ${ py } ${ pz } ${ nx } ${ ny } ${ nz } ${ dgx } ${ dgy } ${ dgz }
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dgpat glow dgval
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0
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0
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4 ${avr} ${avg} ${avb} 0
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dgval ring dgdisk${recno}a
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0
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0
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8
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${ px+dgx*.0001 } ${ py+dgy*.0001 } ${ pz+dgz*.0001 }
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${ dgx } ${ dgy } ${ dgz }
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0 ${ r0/2 }
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dgval ring dgdisk${recno}b
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0
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0
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8
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${ px-dgx*.0001 } ${ py-dgy*.0001 } ${ pz-dgz*.0001 }
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${ -dgx } ${ -dgy } ${ -dgz }
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0 ${ r0/2 }
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';
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$outfmt .= $dirgradfmt if ($dodirgrad);
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# Load & convert ambient values
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print "# Output produced by: $savedARGV\n";
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system "lookamb -h -d $ARGV[0] | rcalc -e 'LV:$lvlsel;SF:$scale' -f rambpos.cal -o '$outfmt'\n";
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exit;
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