General left rotation method

  /**
   * Method to copy the current picture to a new
   * picture but rotated to the left 90 degrees
   * @return the new rotated picture
   */
  public Picture copyWithLeftRotation()
  {
    Picture targetPicture = new Picture(this.getHeight(),
                                        this.getWidth());
    Pixel sourcePixel = null;
    Pixel targetPixel = null;
    
    // loop through the columns
    for (int sourceX = 0; 
         sourceX < this.getWidth(); 
         sourceX++)
    {
      // loop through the rows
      for (int sourceY = 0; 
           sourceY < this.getHeight(); 
           sourceY++)
      {
        // set the target pixel color to the source pixel color
        sourcePixel = this.getPixel(sourceX,sourceY);
        targetPixel = targetPicture.getPixel(sourceY, 
              this.getWidth() - 1 - sourceX);
        targetPixel.setColor(sourcePixel.getColor());
      }
    }
    return targetPicture;
  }
 

/**
   * Method to copy Katie rotated to the left 90 degrees
   * @return the picture after Katie has been copied and rotated to the left 90
   */
  public static Picture copyKatieLeftRotation()
  {
    String sourceFile = Picture.getMediaPath("KatieFancy.jpg");
    Picture sourcePicture = new Picture(sourceFile);
    String targetFile = Picture.getMediaPath("7inx95in.jpg");
    Picture targetPicture = null;
    
    // copy with left rotation
    targetPicture = sourcePicture.copyWithLeftRotation();
    
    // show the source and target pictures
    sourcePicture.show();
    targetPicture.show();
    
    return targetPicture;
  }

Link to this Page

• Picture Methods from Teachers last edited on 16 June 2004 at 10:01 am by 216-88-16-125.tes.bil.biltmorecommunications.net