NyARLabelOverlapChecker.java :  » UnTagged » mobilebombsquad » jp » nyatla » nyartoolkit » core » labeling » Android Open Source

/* 
 * PROJECT: NyARToolkit
 * --------------------------------------------------------------------------------
 * This work is based on the original ARToolKit developed by
 *   Hirokazu Kato
 *   Mark Billinghurst
 *   HITLab, University of Washington, Seattle
 * http://www.hitl.washington.edu/artoolkit/
 *
 * The NyARToolkit is Java edition ARToolKit class library.
 * Copyright (C)2008-2009 Ryo Iizuka
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 * 
 * For further information please contact.
 *  http://nyatla.jp/nyatoolkit/
 *  <airmail(at)ebony.plala.or.jp> or <nyatla(at)nyatla.jp>
 * 
 */
package jp.nyatla.nyartoolkit.core.labeling;

import java.lang.reflect.Array;


/**
 *  
 *  
 */
public class NyARLabelOverlapChecker<T extends NyARLabelInfo>
{
  private T[] _labels;
  private int _length;
  private Class<T> _element_type;
  /*
  */
  @SuppressWarnings("unchecked")
  public NyARLabelOverlapChecker(int i_max_label,Class<T> i_element_type)
  {
    this._element_type=i_element_type;
    this._labels = (T[])Array.newInstance(i_element_type, i_max_label);
  }

  /**
   * 
   * 
   * @param i_label_ref
   */
  public void push(T i_label_ref)
  {
    this._labels[this._length] = i_label_ref;
    this._length++;
  }

  /**
   * 
   * 
   * @param i_label
   * @return false,true
   */
  public boolean check(T i_label)
  {
    // 
    final T[] label_pt = this._labels;
    final int px1 = (int) i_label.pos_x;
    final int py1 = (int) i_label.pos_y;
    for (int i = this._length - 1; i >= 0; i--) {
      final int px2 = (int) label_pt[i].pos_x;
      final int py2 = (int) label_pt[i].pos_y;
      final int d = (px1 - px2) * (px1 - px2) + (py1 - py2) * (py1 - py2);
      if (d < label_pt[i].area / 4) {
        // 
        return false;
      }
    }
    // 
    return true;
  }
  /**
   * i_max_label
   * 
   * @param i_max_label
   */
  @SuppressWarnings("unchecked")
  public void setMaxLabels(int i_max_label)
  {
    if (i_max_label > this._labels.length) {
      this._labels = (T[])Array.newInstance(this._element_type, i_max_label);
    }
    this._length = 0;
  }  
  
  
}