271 lines
6.7 KiB
Perl
271 lines
6.7 KiB
Perl
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#!/usr/bin/perl
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#
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# Planet Generator
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#
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# Syntax: ./generate.pl <output>
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#
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# Generates a random POVRay script for a planet
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#
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sub genSingle
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{
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# Load template
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open(TMPL, "<template.pov") or die "couldn't open template\n";
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@tmpl = <TMPL>;
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close TMPL;
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# Generate texture
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$pSize = sprintf("%.2f", 1 + rand() * 0.75);
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@types = ("agate", "bozo", "granite", "wood");
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$type = $types[int(rand() * @types)];
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$ambient = rand() * .25;
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$shining = rand() * .1;
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$txt = "pigment {\n\t\t\t$type\n";
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# Generate turbulence
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@tm = (int(rand() * 3), int(rand() * 3), int(rand() * 3));
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$toc = 1 + int(rand() * 3);
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$tol = sprintf "%.2f", 1 + rand() * 2;
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$too = sprintf "%.2f", 0.25 + rand() * 0.5;
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$txt .= "\t\t\twarp { turbulence <" . join(",", @tm) . "> octaves $too lambda $tol omega $too }\n";
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# Generate color map
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$mainColor = int(rand() * 3);
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$secColor = int(rand() * 3);
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$nColors = int(rand() * 10) + 5;
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$current = 0;
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$txt .= "\t\t\tcolor_map {\n";
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for ($i=0;$i<$nColors;$i++)
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{
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$mx = (1 - $current) / ($nColors - $i);
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$cs = sprintf "%.2f", ($i == $nColors - 1) ? (1 - $current) : (rand() * $mx);
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$cs += $current;
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$txt .= "\t\t\t\t[$cs color rgb <";
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@cg = map { sprintf "%.2f", $_ } (0.4 + rand() * 0.5, 0.2 + rand() * 0.5, rand() * 0.5);
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@rc = ();
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for ($j=0;$j<3;$j++)
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{
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$rc[$j] = ($mainColor == $j ? $cg[0] : ($secColor == $j ? $cg[1] : $cg[2]));
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}
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$txt .= join(",",@rc) . ">]\n";
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$current = $cs;
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}
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$txt .= "\t\t\t}\n";
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# Random pigment rotation
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$txt .= "\t\t\trotate x * " . int(rand() * 360) . "\n";
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$txt .= "\t\t\trotate y * " . int(rand() * 360) . "\n";
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$txt .= "\t\t\trotate z * " . int(rand() * 360) . "\n";
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$txt .= "\t\t}\n";
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# Generate finish
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$txt .= "\t\tfinish { ambient $ambient phong $shining }\n";
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# Light source rotation
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$lsr = int(rand() * 358);
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open(TARGET, ">$ref") or die "couldn't create target file\n";
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# Rings
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if ($pSize < 1.25 && rand() < 0.5)
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{
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print TARGET "#declare RINGS = 1;\n";
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$rhrad = $pSize + 0.05 + sprintf("%.2f", rand() * 0.2);
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$rrad = $rhrad + 0.3 + sprintf("%.2f", rand() * 0.2);
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$t = rand();
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$b = 0.6 + rand() * 0.2;
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if ($t < 0.25)
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{
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@cg = map { sprintf "%.2f", $_ } ($b + rand() * 0.1, $b + rand() * 0.05, $b);
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@rc = ();
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for ($j=0;$j<3;$j++)
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{
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$rc[$j] = ($mainColor == $j ? $cg[0] : ($secColor == $j ? $cg[1] : $cg[2]));
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}
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($rr, $rg, $rb, $rt) = (@rc,sprintf("%.2f",0.2+rand()*0.15));
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}
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else
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{
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($rr, $rg, $rb, $rt) = map { sprintf "%.2f", $_ } ($b,$b,$b,0.2+rand()*0.15);
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}
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$rcmap = "\t\t\t\t[0.00 color rgbt <$rr,$rg,$rb,1>]\n";
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$rcmap .= "\t\t\t\t[0.05 color rgbt <$rr,$rg,$rb,$rt>]";
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$acc = 0;
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$n = 0.05;
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$oldlv = 1;
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while ($n < 0.99)
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{
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$n += 0.05;
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$acc += rand();
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next if $acc < (.5/($rrad-$rhrad));
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$acc = 0;
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do { $lv = 1 + int(rand() * 3); } while ($lv == $oldlv);
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$oldlv = $lv;
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$lv *= $rt;
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($lv > 1) && ($lv = 1);
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$rcmap .= "\n\t\t\t\t[" . sprintf("%.2f", $n) . " color rgbt <$rr,$rg,$rb,$lv>]";
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}
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$rcmap .= "\t\t\t\t[1.00 color rgbt <$rr,$rg,$rb,1>]\n";
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do { $rrot = int(rand() * 60) - 30; } while (abs($rrot) < 10);
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do { $rrot2 = int(rand() * 60) - 30; } while (abs($rrot2) < 10);
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}
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foreach $l (@tmpl)
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{
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$l =~ s/PSIZE/$pSize/;
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$l =~ s/TEXTURE/$txt/;
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$l =~ s/LSROT/$lsr/;
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$l =~ s/RRAD/$rrad/;
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$l =~ s/RHRAD/$rhrad/;
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$l =~ s/RROTZ/$rrot/;
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$l =~ s/RROTY/$rrot2/;
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$l =~ s/RR/$rr/;
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$l =~ s/RG/$rg/;
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$l =~ s/RB/$rb/;
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$l =~ s/RT/$rt/;
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$l =~ s/RCMAP/$rcmap/;
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print TARGET $l;
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}
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close TARGET;
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}
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sub genCluster
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{
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# Load template
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open(TMPL, "<template2.pov") or die "couldn't open template\n";
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@tmpl = <TMPL>;
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close TMPL;
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$nPlanets = 2 + int(rand() * 2);
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$psBase = 1.2 / $nPlanets;
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$psRand = 0.55 / $nPlanets;
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$mainColor = int(rand() * 3);
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@ps = @tx = @cx = @cy = @cz = ();
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for ($p=0;$p<$nPlanets;$p++)
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{
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$pSize = sprintf("%.2f", $psBase + rand() * $psRand);
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# Generate texture
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@types = ("agate", "bozo", "granite", "wood");
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$type = $types[int(rand() * @types)];
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$ambient = rand() * .25;
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$shining = rand() * .1;
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$txt = "pigment {\n\t\t\t$type\n";
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# Generate turbulence
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@tm = (int(rand() * 3), int(rand() * 3), int(rand() * 3));
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$toc = 1 + int(rand() * 3);
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$tol = sprintf "%.2f", 1 + rand() * 2;
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$too = sprintf "%.2f", 0.25 + rand() * 0.5;
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$txt .= "\t\t\twarp { turbulence <" . join(",", @tm) . "> octaves $too lambda $tol omega $too }\n";
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# Generate color map
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$secColor = int(rand() * 3);
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$nColors = int(rand() * 10) + 5;
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$current = 0;
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$txt .= "\t\t\tcolor_map {\n";
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for ($i=0;$i<$nColors;$i++)
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{
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$mx = (1 - $current) / ($nColors - $i);
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$cs = sprintf "%.2f", ($i == $nColors - 1) ? (1 - $current) : (rand() * $mx);
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$cs += $current;
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$txt .= "\t\t\t\t[$cs color rgb <";
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@cg = map { sprintf "%.2f", $_ } (0.4 + rand() * 0.5, 0.2 + rand() * 0.5, rand() * 0.5);
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@rc = ();
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for ($j=0;$j<3;$j++)
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{
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$rc[$j] = ($mainColor == $j ? $cg[0] : ($secColor == $j ? $cg[1] : $cg[2]));
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}
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$txt .= join(",",@rc) . ">]\n";
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$current = $cs;
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}
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$txt .= "\t\t\t}\n";
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# Random pigment rotation
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$txt .= "\t\t\trotate x * " . int(rand() * 360) . "\n";
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$txt .= "\t\t\trotate y * " . int(rand() * 360) . "\n";
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$txt .= "\t\t\trotate z * " . int(rand() * 360) . "\n";
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$txt .= "\t\t}\n";
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# Generate finish
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$txt .= "\t\tfinish { ambient $ambient phong $shining }\n";
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push @ps, $pSize;
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push @tx, $txt;
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}
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# Generate coordinates
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if ($nPlanets == 2)
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{
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$e = 1.5 - ($ps[0] + $ps[1]);
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$w = ($e + rand() * $e) / 2;
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@cx = ($w+$ps[0], -$w-$ps[1]);
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@cy = @cz = (0, 0);
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}
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else
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{
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$e1 = $ps[0] + $ps[1];
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$e2 = $ps[2] + $ps[1];
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$e3 = $ps[0] + $ps[2];
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$m = (($e1>$e2 && $e1>$e3) ? $e1 : (($e2>$e1 && $e2>$e3) ? $e2 : $e3));
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$e = 1.3 - $m;
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$w = ($e + rand() * $e) / 2;
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$rw = $w + $m;
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$d = $rw * cos(3.1415926535/6);
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@cx = ($d, $d * cos(2*3.1415926535/3), $d * cos(4*3.1415926535/3));
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@cy = (0, $d * sin(2*3.1415926535/3), $d * sin(4*3.1415926535/3));
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@cz = (0, 0, 0);
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}
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$rotx = int(rand() * 360);
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$roty = int(rand() * 360);
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$rotz = int(rand() * 360);
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print join(',', @cx) . "\n";
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print join(',', @cy) . "\n";
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# Light source rotation
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$lsr = int(rand() * 358);
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open(TARGET, ">$ref") or die "couldn't create target file\n";
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foreach $l (@tmpl)
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{
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$l =~ s/LSROT/$lsr/;
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$l =~ s/ROTX/$rotx/;
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$l =~ s/ROTY/$roty/;
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$l =~ s/ROTZ/$rotz/;
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$l =~ s/NP;/$nPlanets;/;
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for ($i=0;$i<$nPlanets;$i++)
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{
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$pSize = $ps[$i];
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$txt = $tx[$i];
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$x = $cx[$i];
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$y = $cy[$i];
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$z = $cz[$i];
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$np = $i + 1;
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$l =~ s/PSIZE$np/$pSize/;
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$l =~ s/TEXTURE$np/$txt/;
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$l =~ s/X$np/$x/;
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$l =~ s/Y$np/$y/;
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$l =~ s/Z$np/$z/;
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}
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print TARGET $l;
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}
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close TARGET;
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}
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$ref = $ARGV[0];
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die "Syntax: $0 <output>\n" if $ref eq "";
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if (rand() < 0.9) { genSingle(); }
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else { genCluster(); }
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