Short few bits of code to bash out a sculptie from a 127x256 Gimp-made PGM (greyscale plain pixmap, not raw!). The plain PGM was made with the first and last rows completely white, and what I needed to rotate around the Z axis in black. The one-liner extracts the radii, the following script generates a plain PPM that takes those radii and rotates it around the Z axis, stepping through every 1.4 degrees (roughly). 
 tail -n +5 Sculptie.pgm | perl -nle 'BEGIN{$l=$c=0;} $c++ unless($_);
+if(++$l==127){$l=0;print $c; $c=0;}' > Sculptie.zr

#!/usr/bin/perl

# Use: rot.pl < Sculptie.zr > Sculptie.ppm

#4 * atan2 1, 1;

my $step= 4*atan2(1,1)/128;
my $i=0;
my $a=$step*255;
my @r,$j,$k,$z,$zi;

while(<>) {
  chomp;
  $r[$i++]=$_;
}
$z=$i;
$z--;
print "P3\n256 256 255\n";

for($j=$z;$j>-1;$j--) {
  $a=$step*255;
  for($i=0;$i<256;$i++) {
    my $x=127+int($r[$j]*cos($a));
    my $y=127+int($r[$j]*sin($a));
    print "$x $y $j\n";
    $a-=$step;
  }
}

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In reply to Rotating Second Life Sculpties by strredwolf

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