function incPosY($posY)
    {
        $oldY = $this->posY;
        $this->posY += $posY;
        $this->onMove($this->posX, $oldY, $this->posZ);
    }
function incPosY($posY)
    {
        $oldY = $this->posY;
        $this->posY += $posY;
        $this->onMove($this->posX, $oldY, $this->posZ);
    }
function incPosY ( $ posY ) { $ oldY = $ this -> posY ; $ this -> posY += $ posY ; $ this -> onMove ( $ this -> posX , $ oldY , $ this -> posZ ) ; }
Increment position Y
@param float
Increment position Y