float $radius = 20;
vector $cp = <<rand(-1,1),rand(-1,1),rand(-1,1)>>;
float $distanceFromOrigin = sqrt(pow($cp.x,2)+pow($cp.y,2)+pow($cp.z,2));
float $nx,$ny,$nz;
$nx = $cp.x / $distanceFromOrigin *$radius;
$ny = $cp.y / $distanceFromOrigin *$radius;
$nz = $cp.z / $distanceFromOrigin *$radius;
particleShape1.position = <<$nx,$ny,$nz>>;