wptstrack.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 org.w3c.dom.Node;
import net.aetherial.gis.surface.ItemValue;
import java.util.Vector;
import net.aetherial.gis.publicuse.WptTrackDistance;
import net.aetherial.gis.our.auto.check.repeattrk.TrackRectangle;

/**
 * <p>Title: </p>
 *
 * <p>Description: </p>
 *
 * <p>Copyright: Copyright (c) 2004</p>
 *
 * <p>Company: </p>
 *
 * @author not attributable
 * @version 1.0
 */
public class WPTsTrack {

  private static double fanwei = 4;

  public WPTsTrack() {
  }

  /**
   * 得到航点相近的航迹
   */
  public static Node[] getWptNearTrack(Node wpt){
    Node[] trks = ItemValue.getTracks();
    if (trks == null) {
      return new Node[0];
    }
    Vector nearTrks = new Vector();
    for (int i = 0; i < trks.length; i++) {
      if (WptTrackDistance.getWptToTrackDis(wpt,trks[i]) < TrackRectangle.NEAR_DISTANCE * fanwei) {
        nearTrks.add(trks[i]);
      }
    }
    trks = new Node[nearTrks.size()];
    nearTrks.copyInto(trks);
    return trks;
  }

  /**
   * 得到最近的航迹
   */
  public static Node getWptMostNearTrack(Node wpt){
    Node[] trks = ItemValue.getTracks();
//    Vector nearTrks = new Vector();
    double mindis = Double.MAX_VALUE,dis;
    Node trkTemp = null;
    for (int i = 0;trks != null && i < trks.length; i++) {
      dis = WptTrackDistance.getWptToTrackDis(wpt,trks[i]);
      if (dis < mindis) {
        mindis = dis;
        trkTemp = trks[i];
      }
    }
    return trkTemp;
  }

  /**
   * 得到最近的航迹
   */
  public static Node getWptMostNearTrack(Node wpt,Node[] trks){
//    Node[] trks = ItemValue.getTracks();
//    Vector nearTrks = new Vector();
    double mindis = Double.MAX_VALUE,dis;
    Node trkTemp = null;
    for (int i = 0;trks != null && i < trks.length; i++) {
      dis = WptTrackDistance.getWptToTrackDis(wpt,trks[i]);
      if (dis < mindis) {
        mindis = dis;
        trkTemp = trks[i];
      }
    }
    return trkTemp;
  }


  /**
   * 给定多少米
   */
  public static void setFanwei(double meter) {
    WPTsTrack.fanwei = meter / 20;
  }

}