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Rotate.java
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Rotate.java
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/*
****************************************************************************
* Flavio Andrade
* 4-25-2017
* Compilation: javac Rotate.java
* Execution: java Rotate Images/Ferrari.jpeg degrees
GrayImage.java has to be compiled before Rotate.java can work.
To display a rotated image without animation call rotateIt(degrees) and then showImage(image).
To rotate the image forever, call rotate().
Use a positive degree to rotate counter-clockwise or a negative degree to rotate clockwise.
*****************************************************************************
*/
import java.awt.image.BufferedImage;
import java.awt.Color;
import javax.swing.ImageIcon;
import javax.swing.JLabel;
import java.awt.BorderLayout;
import javax.swing.JFrame;
import java.lang.Math;
import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import java.awt.image.AffineTransformOp;
public class Rotate {
public BufferedImage image, newImage;
public GrayImage gray;
public String name;
public int width, height, diagonal;
public Rotate (String filename) {
name = filename;
// Gray Image object
gray = new GrayImage(name);
int gW = gray.image.getWidth();
int gH = gray.image.getHeight();
// Scale the image if it is too big.
if (gW > 400 || gH > 400) {
image = this.scale(gray.image, 0.5, 0.5);
}
else {
// The original image
image = gray.returnOriginal();
}
width = image.getWidth();
height = image.getHeight();
// Height and width
this.diagonal();
}
// Compute length of the diagonal.
private void diagonal() {
diagonal = (int) Math.sqrt(width * width + height * height);
}
//Scale the image for faster animation
public BufferedImage scale(BufferedImage img, double xscale, double yscale) {
int w = (int) (img.getWidth() * xscale);
int h = (int) (img.getHeight() * yscale);
BufferedImage result = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
AffineTransform af = new AffineTransform();
af.scale(xscale, yscale);
AffineTransformOp scale = new AffineTransformOp(af, AffineTransformOp.TYPE_BILINEAR);
result = scale.filter(img, result);
return result;
}
// Take the image and rotate it n degrees.
private int[] newCoordinate(double degrees, int c, int h) {
double radians = Math.toRadians(degrees);
// Rotational matrix operation on the coordinate (c, h);
int x = (int) Math.round(Math.cos(radians) * c - Math.sin(radians) * h);
int y = (int) Math.round(Math.sin(radians) * c + Math.cos(radians) * h);
int[] coordinates = { x, y };
return coordinates;
}
// Take the image and rotate it.
public void rotateIt(double degrees) {
newImage = new BufferedImage(diagonal + 10, diagonal + 10, BufferedImage.TYPE_INT_RGB);
int x = 0;
int y = 0;
for (int h = 0; h < height; h++) {
for (int c = 0; c < width; c++) {
// Shift x and y to the middle of the rotating image.
x = c - width / 2;
y = h - height / 2;
int[] a = this.newCoordinate(degrees, y, x);
int color = image.getRGB(c, h);
newImage.setRGB(a[1] + (diagonal + 10) / 2, a[0] + (diagonal + 10) / 2, color);
}
}
}
// show the new rotated image.
public void showImage(BufferedImage img) {
ImageIcon icon = new ImageIcon(img);
JLabel label = new JLabel();
label.setHorizontalAlignment(JLabel.CENTER);
label.setIcon(icon);
JFrame frame = new JFrame(name);
frame.setSize(diagonal, diagonal);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(label, BorderLayout.CENTER);
frame.setVisible(true);
}
// Save the file.
public void save(String name) {
gray.save(this.newImage, name);
}
// Animation to rotate the image.
public void rotate(double d) {
//BufferedImage img = this.rotateIt(0, this.image);
gray.setUp(image, diagonal + 10, diagonal + 10, "Rotation");
int r = 0;
// Slow and not smooth with larger images.
while (true) {
this.rotateIt(r += d);
gray.icon = new ImageIcon(this.newImage);
gray.label.setIcon(gray.icon);
gray.label.setHorizontalAlignment(JLabel.CENTER);
gray.frame.getContentPane().add(gray.label, BorderLayout.CENTER);
gray.frame.setVisible(true);
gray.frame.repaint();
}
//this.save("Rotated");
}
// Test Case.
public static void main(String args[]) throws InterruptedException {
String name = args[0];
double degrees = Double.parseDouble(args[1]);
Rotate rot = new Rotate(name);
rot.rotate(degrees);
}
}