house.java

java 图形处理

/* Display still picture of house and trees.
   (3 Feb 00)
*/

import java.awt.*;

public class House {

   /** Return picture of house and trees.
       Width = 40.  Height = 30.
   */
   public static Picture houseAndTrees()
   {  /* Define the sun. Centre at (0,0).*/
      Picture sun =
         Picture.circle(Color.yellow).size(2);

      /* Define a tree.
         Height = 20.
         Origin at middle of base of trunk.
      */
      Color brown = new Color(0.2f, 0.25f, 0.1f);
      Color green = new Color(0f, 0.6f, 0.2f);
      Picture trunk =
         Picture.box(brown).scale(2,15).at(-1,0);
      Picture crown =
         Picture.circle(green).size(6).at(0,14);
      Picture tree = crown.over(trunk);

      /* Define the house.
         Height = 20.
         Bottom-left corner at (0,0).
      */
      Color lightGray = new Color(0.8f, 0.8f, 0.8f);
      Color black = Color.black;
      Color white = Color.white;
      Color red = new Color(1f, 0.2f, 0f);

      Picture wall =
         Picture.box(white).scale(20,10)
         .under(Picture.box(black).scale(3,3).at(5,4))
         .under(Picture.box(red).scale(3,7).at(13,0));

      Picture roof =
         Picture.triangle(0,10, 10,20, 20,10, lightGray)
         .over(Picture.box(white).scale(3,10).at(13,10));

      Picture house = roof.over(wall);

      Picture scene =
         house.size(0.8).at(11,0)
         .over(tree.at(4.5,0))
         .over(tree.size(0.75).at(30,0))
         .over(tree.at(36,0))
         .over(sun.at(11,24));

      return scene;
   }

   /****************************************************/

   public static void main(String[] a) {
      houseAndTrees().
      show(0,0,40,30,7,Color.blue);
   }
}