wptintrackzhuanghao.java

基于Java的地图数据管理软件。使用MySQL数据库管理系统。

package net.aetherial.gis.publicuse.wpt;

import net.aetherial.gis.surface.ItemValue;
import org.w3c.dom.Node;
import java.util.Vector;
import net.aetherial.gis.publicuse.TrackOper;
import net.aetherial.gis.our.auto.check.repeattrk.TrackRectangle;
import org.w3c.dom.NodeList;
/**
 * <p>Title: </p>
 *
 * <p>Description: 航点在航迹中的桩号 </p>
 *
 * <p>Copyright: Copyright (c) 2004</p>
 *
 * <p>Company: </p>
 *
 * @author not attributable
 * @version 1.0
 */
public class WptInTrackZhuanghao {
  private Node waypoint = null;
  private Node track = null;

  public WptInTrackZhuanghao() {
  }

  public void setWaypoint(Node waypoint) {
    this.waypoint = waypoint;
  }

  public void setTrack(Node track) {
    this.track = track;
  }

//  private


  /**
   * 得到最近的航迹点
   */
  private Node getNearstTrackpoints(){
    NodeList nl = ItemValue.getTracksPoint(this.track);
    double mindis = 10000,temp;
    Node mintp = null;
    for (int i = 0; i < nl.getLength(); i++) {
      temp = getDis(waypoint,nl.item(i));
      if (temp < mindis) {
        mindis = temp;
        mintp = nl.item(i);
      }
    }
    return mintp;
  }

  private double getDis(Node wpt,Node trackpoint){
    double wpt_x = Double.parseDouble(ItemValue.getWaypointX(wpt));
    double wpt_y = Double.parseDouble(ItemValue.getWaypointY(wpt));
    double tp_x = Double.parseDouble(ItemValue.getTracksPointX(trackpoint));
    double tp_y = Double.parseDouble(ItemValue.getTracksPointY(trackpoint));
    return Math.sqrt((wpt_x - tp_x) * (wpt_x - tp_x) + (wpt_y - tp_y) * (wpt_y - tp_y));
  }
}