tag.php
public function write($encoding, $x = 1, $y = 1)
    {
        if ($this->getName()) {
            $encoding->add($this->getName() . '.x', $x);
            $encoding->add($this->getName() . '.y', $y);
        } else {
            $encoding->add('x', $x);
            $encoding->add('y', $y);
        }
    }
public function write($encoding, $x = 1, $y = 1)
    {
        if ($this->getName()) {
            $encoding->add($this->getName() . '.x', $x);
            $encoding->add($this->getName() . '.y', $y);
        } else {
            $encoding->add('x', $x);
            $encoding->add('y', $y);
        }
    }
Dispatches the value into the form encoded packet.

@param SimpleEncoding $encoding    Form packet.
@param int $x                  X coordinate of click.
@param int $y                  Y coordinate of click.