beelineedge.java

来自「基于面向对象的数据库编程」· Java 代码 · 共 76 行

package brgeometry;

/**
 * <p>Title: Broundary Rrepresentaion</p>
 * <p>Description: 直线</p>
 * <p>Copyright: Copyright (c) 2003</p>
 * <p>Company: USTC</p>
 * @author unascribed
 * @version 1.0
 */

public class BeelineEdge
    extends Edge {

  //直线的属性
  private Vertice startVertice;
  private Vertice endVertice;
 // public double length;
  public BeelineEdge() {
  }

  public BeelineEdge(Vertice startVertice, Vertice endVertice) {
    this.startVertice = startVertice;
    this.endVertice = endVertice;
    this.setLength(this.getLength());
  }

  public BeelineEdge(BeelineEdge e) {
    this.startVertice = e.startVertice;
    this.endVertice = e.endVertice;
  }

  //属性操作
  public void setStartVertice(Vertice startVertice) {
    this.startVertice = startVertice;
  }

  public void setEndVertice(Vertice endVertice) {
    this.endVertice = endVertice;
  }

  public Vertice getStartVertice() {
    return this.startVertice;
  }

  public Vertice getEndVertice() {
    return this.endVertice;
  }

  //实现操作
  public double getLength() {
    return startVertice.distance(endVertice);
  }


  /*  public BeelineEdge diagonal(BeelineEdge edg) {
      return new BeelineEdge(this.startVertice, edg.endVertice);
    }
   */
  public Vertice getOrigin() {
    return this.startVertice;
  }

  //利用点的操作实现具体的操作
  public void translate(Vertice v) {
    this.startVertice.translate(v);
    this.endVertice.translate(v);
  }

  public void scale(double times) {
    this.endVertice.scale(times);
  }

  public void rotate() {}

}