global proc int getNearIDAttr(string $particleShapeName,int $id){
	float $tmp[] = `eval("getParticleAttr -at nearID -array true "+$particleShapeName+".pt["+$id+"]")`;
	int $nearID = $tmp[0];
	return $nearID;
}

global proc float getDistance(int $myID, string $particleShapeName, int $compareID){
	float $position1[] = `eval("getParticleAttr -at position -array true "+$particleShapeName+".pt["+$myID+"]")`;
	float $position2[] = `eval("getParticleAttr -at position -array true "+$particleShapeName+".pt["+$compareID+"]")`;

	float $tmpX = $position1[0]-$position2[0];
	float $tmpY = $position1[1]-$position2[1];
	float $tmpZ = $position1[2]-$position2[2];
	
	return sqrt(pow($tmpX,2)+pow($tmpY,2)+pow($tmpZ,2));
}
global proc int findNearestID(int $myID, string $particleShapeName, int $numOfComparing){

	float $nearestDistance = -1;
	int $nearestID = -1;
	int $totalNumOfParticle = `eval("getAttr "+$particleShapeName+".count")`;
	
	for($i = 0; $i < $numOfComparing; $i++){

		seed($i+$myID);

		if(getNearIDAttr($particleShapeName,floor(rand($totalNumOfParticle))) != -1 && $i != $myID){

			float $distance = getDistance($myID,$particleShapeName,$i);

			if($nearestDistance == -1 || $nearestDistance > $distance){

				$nearestDistance = $distance;
				$nearestID = $i;

			}
		}
	}
	return $nearestID ;
}