//source the script
//to use select all the particle systems, or just on particle system
//type "mp2csv("someName") in the command line
//it will write a text file which can be read into rhino or GC (or others)
//the file will be located in you default script directory

proc mp2csv(string $fname)
{

$ctime = `currentTime -query`;
$exampleFileName = ( `internalVar -usd` + $fname + $ctime + ".txt" );
$fileId = `fopen $exampleFileName "w"`;
$sel = `ls -sl`;
int $selsize = `size($sel)`;

for ($j=0; $j<$selsize; ++$j)
{
	for ($i=0; $i<`getAttr ($sel[$j] + ".count")`; $i++)
		{ 

		float $partPos[] = `getParticleAttr -at pos ($sel[$j] +".pt[" +$i+"]")`;
		float $pos1x = $partPos[0];
		float $pos1y = $partPos[1];
		float $pos1z = $partPos[2];
		fprint $fileId ($pos1x + "," + $pos1y + "," + $pos1z + "\n");
		}	
}


fclose $fileId;
print ("File created at " + `internalVar -usd` + $fname + ".txt");
}