roundcurveedge.java

基于面向对象的数据库编程

package brgeometry;

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

public class RoundCurveEdge
    extends CurveEdge {

  private Vertice centralPoint;
  private Vertice circlePoint;
 // public double length;

  public RoundCurveEdge(Vertice centralPoint, Vertice circlePoint) {
    this.centralPoint = centralPoint;
    this.circlePoint = circlePoint;
    this.setLength(this.getLength());
    this.setCurvature(1/this.getRadius());
  }

  public RoundCurveEdge() {
    this.setLength(this.getLength());
  }

  //属性操作
  public void setcentralPoint(Vertice centralPoint) {
    this.centralPoint = centralPoint;
  }

  public void setcirclePoint(Vertice circlePoint) {
    this.circlePoint = circlePoint;
  }

  public Vertice getcentralPoint() {
    return this.centralPoint;
  }

  public Vertice getcirclePoint() {
    return this.circlePoint;

  }

  //计算周长
  public double getRadius() {
    return Math.sqrt( (centralPoint.getX() - circlePoint.getX()) *
                      (centralPoint.getX() - circlePoint.getX()) +
                      (centralPoint.getY() - circlePoint.getY()) *
                      (centralPoint.getY() - circlePoint.getY()) +
                      (centralPoint.getZ() - circlePoint.getZ()) *
                      (centralPoint.getZ() - circlePoint.getZ()));
  }


  public double getLength() {
    return (2 * 3.1415926 * getRadius());
  }

}