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In the next module, you will learn how to mirror images both horizontally and vertically.
While not a requirement of the course, you can select the following link to view an optional online video lecture on the material in this module.
This section contains a variety of miscellaneous information.
Financial : Although the Connexions site makes it possible for you to download a PDF file for thismodule at no charge, and also makes it possible for you to purchase a pre-printed version of the PDF file, you should beaware that some of the HTML elements in this module may not translate well into PDF.
I also want you to know that, I receive no financial compensation from the Connexions website even if you purchase the PDF version of the module.
In the past, unknown individuals have copied my modules from cnx.org, converted them to Kindle books, and placed them for sale on Amazon.com showing me as the author. Ineither receive compensation for those sales nor do I know who does receive compensation. If you purchase such a book, please beaware that it is a copy of a module that is freely available on cnx.org and that it was made and published withoutmy prior knowledge.
Affiliation : I am a professor of Computer Information Technology at Austin Community College in Austin, TX.
A complete listing of the program discussed in this module is shown in Listing 10 below.
| Listing 10 . Complete program listing. |
|---|
/*File Prob01 Copyright 2008 R.G.Baldwin
Revised 12/17/08*********************************************************/
import java.awt.Graphics2D;import java.awt.geom.AffineTransform;
import java.awt.geom.Rectangle2D;import java.awt.Graphics;
public class Prob01{//DO NOT MODIFY THE CODE IN THIS CLASS DEFINITION.
public static void main(String[]args){
new Prob01Runner().run();}//end main method
}//end class Prob01//======================================================//
class Prob01Runner{public Prob01Runner(){
System.out.println("Display your name here.");}//end constructor
//----------------------------------------------------//public void run(){
Picture pic = new Picture("Prob01.jpg");//Add your name and display the picture.
pic.addMessage("Display your name here.",10,20);pic.explore();
pic = pic.scale(0.95,0.9);pic = rotatePicture(pic,30);
pic.explore();System.out.println(pic);
}//end run//----------------------------------------------------//
//This method accepts a reference to a Picture object// along with a rotation angle in degrees. It creates
// and returns a new Picture object that is of the// correct size to contain and display the incoming
// picture after it has been rotated around its center// by the specified rotation angle and translated to the
// center of the new Picture object.private Picture rotatePicture(Picture pic,double angle){
//Set up the rotation transformAffineTransform rotateTransform =
new AffineTransform();rotateTransform.rotate(Math.toRadians(angle),
pic.getWidth()/2,pic.getHeight()/2);
//Get the required dimensions of a rectangle that will// contain the rotated image.
Rectangle2D rectangle2D =pic.getTransformEnclosingRect(rotateTransform);
int resultWidth = (int)(rectangle2D.getWidth());int resultHeight = (int)(rectangle2D.getHeight());
//Set up the translation transform that will translate// the rotated image to the center of the new Picture
// object.AffineTransform translateTransform =
new AffineTransform();translateTransform.translate(
(resultWidth - pic.getWidth())/2,(resultHeight - pic.getHeight())/2);
//Concatenate the two transforms so that the image// will first be rotated around its center and then
// translated to the center of the new Picture object.translateTransform.concatenate(rotateTransform);
//Create a new Picture object to contain the results// of the transformation.
Picture result = new Picture(resultWidth,resultHeight);
//Get the graphics context of the new Picture object,// apply the transform to the incoming picture and
// draw the transformed picture on the new Picture// object.
Graphics2D g2 = (Graphics2D)result.getGraphics();g2.drawImage(pic.getImage(),translateTransform,null);
return result;}//end rotatePicture
//----------------------------------------------------//}//end class Prob01Runner |
-end-
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