Example 23.13: The abstract shape class

package elharo.vrml;

public abstract class shape {

  double x = 0.0;
  double y = 0.0;
  double z = 0.0;
    
  
  public void moveTo(double x, double y, double z) {
    this.x = x;
    this.y = y;
    this.z = z;  
  }

  
  public void moveRelative(double x, double y, double z) {
    this.x += x;
    this.y += y;
    this.z += z;  
  }

  public abstract String draw() ;


}