Fix: PeakStream fails to function correctly after the first file

[andy/gpx.git] / src / libgpx / bounds.php

<?php
/**
 * bounds.php
 *
 * Copyright 2018 Andy Street <andy@street.me.uk>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 *
 *
 */

namespace libgpx;

/**
 * A 2D rectangular bounding box.
 *
 * @author Andy Street <andy@street.me.uk>
 */
class Bounds
{

  /**
   * Minimum latitude.
   *
   * @var float
   */
  protected $minlat;

  /**
   * Minimum longitude.
   *
   * @var float
   */
  protected $minlon;

  /**
   * Maximum latitude.
   *
   * @var float
   */
  protected $maxlat;

  /**
   * Maxumum longitude.
   *
   * @var float
   */
  protected $maxlon;

  /**
   * Create a new bounding box.
   *
   * @param float $minlat Minimum latitude.
   * @param float $minlon Minimum longitude.
   * @param float $maxlat Maximum latitude.
   * @param float $maxlon Maximum longitude.
   */
  public function __construct(
    float $minlat,
    float $minlon,
    float $maxlat,
    float $maxlon
  ) {
    $this->minlat = $minlat;
    $this->minlon = $minlon;
    $this->maxlat = $maxlat;
    $this->maxlon = $maxlon;
  }

  /**
   * Fetch minimum latitude.
   *
   * @return float
   */
  public function getMinLat()
  {
    return $this->minlat;
  }

  /**
   * Fetch minimum longitude.
   *
   * @return float
   */
  public function getMinLon()
  {
    return $this->minlon;
  }

  /**
   * Fetch maximum latitude.
   *
   * @return float
   */
  public function getMaxLat()
  {
    return $this->maxlat;
  }

  /**
   * Fetch maximum longitude.
   *
   * @return float
   */
  public function getMaxLon()
  {
    return $this->maxlon;
  }

  /**
   * Extend bounding box to cover another bounding box.
   *
   * @param Bounds $bounds The bounding box to cover.
   * @return void
   */
  public function extend(Bounds $bounds)
  {
    if ($bounds->minlat < $this->minlat) $this->minlat = $bounds->minlat;
    if ($bounds->minlon < $this->minlon) $this->minlon = $bounds->minlon;
    if ($bounds->maxlat > $this->maxlat) $this->maxlat = $bounds->maxlat;
    if ($bounds->maxlon > $this->maxlon) $this->maxlon = $bounds->maxlon;
  }

}