в 17:44, 31 мая 2010

2010-05-31T17:44:26Z

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2010-05-31T15:25:29Z

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== Calculate Rotation Transform with Math.PI ==



<source lang="java">
import java.awt.Canvas;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.geom.AffineTransform;
import java.awt.geom.Line2D;
import javax.swing.JFrame;
public class Draw2DRotate extends JFrame {
public static void main(String args[]) {
Draw2DRotate app = new Draw2DRotate();
}
public Draw2DRotate() {
add("Center", new MyCanvas());
setSize(400, 400);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
}
}
class MyCanvas extends Canvas {
public void paint(Graphics graphics) {
Graphics2D g = (Graphics2D) graphics;
AffineTransform transform = AffineTransform.getRotateInstance(Math.PI / 16.0d);
g.setTransform(transform);
Line2D.Double shape = new Line2D.Double(0.0, 0.0, 300.0, 300.0);
g.draw(shape);
g.setFont(new Font("Helvetica", Font.BOLD, 24));
String text = ("jexp");
g.drawString(text, 300, 50);
Toolkit toolkit = Toolkit.getDefaultToolkit();
Image image = toolkit.getImage("image1.gif");
g.drawImage(image, 100, 150, this);
}
}</source>



== Coordinate Translation. ==



<source lang="java">
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Translation extends JPanel {
public void paint(Graphics g) {
super.paint(g);
Graphics2D g2d = (Graphics2D) g;
g2d.setColor(new Color(150, 150, 150));
g2d.fillRect(20, 20, 80, 50);
g2d.translate(150, 50);
g2d.fillRect(20, 20, 80, 50);
}
public static void main(String[] args) {
JFrame frame = new JFrame("Translation");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new Translation());
frame.setSize(300, 200);
frame.setVisible(true);
}
}</source>



== Move and scale graphical objects with a mouse on the panel ==



<source lang="java">
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseWheelEvent;
import java.awt.event.MouseWheelListener;
import java.awt.geom.Rectangle2D;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class MouseMoveScale extends JPanel {
private Rectangle2D.Float myRect = new Rectangle2D.Float(50, 50, 50, 50);
MovingAdapter ma = new MovingAdapter();
public MouseMoveScale() {
addMouseMotionListener(ma);
addMouseListener(ma);
addMouseWheelListener(new ScaleHandler());
}
public void paint(Graphics g) {
super.paint(g);
Graphics2D g2d = (Graphics2D) g;
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,
RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
g2d.setColor(new Color(0, 0, 200));
g2d.fill(myRect);
}
class MovingAdapter extends MouseAdapter {
private int x;
private int y;
public void mousePressed(MouseEvent e) {
x = e.getX();
y = e.getY();
}
public void mouseDragged(MouseEvent e) {
int dx = e.getX() - x;
int dy = e.getY() - y;
if (myRect.getBounds2D().contains(x, y)) {
myRect.x += dx;
myRect.y += dy;
repaint();
}
x += dx;
y += dy;
}
}
class ScaleHandler implements MouseWheelListener {
public void mouseWheelMoved(MouseWheelEvent e) {
int x = e.getX();
int y = e.getY();
if (e.getScrollType() == MouseWheelEvent.WHEEL_UNIT_SCROLL) {
if (myRect.getBounds2D().contains(x, y)) {
float amount = e.getWheelRotation() * 5f;
myRect.width += amount;
myRect.height += amount;
repaint();
}
}
}
}
public static void main(String[] args) {
JFrame frame = new JFrame("Moving and Scaling");
MouseMoveScale m = new MouseMoveScale();
m.setDoubleBuffered(true);
frame.add(m);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(300, 300);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
}</source>



== Rotate a line of character (String) ==



<source lang="java">
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.font.FontRenderContext;
import java.awt.font.GlyphVector;
import java.awt.geom.AffineTransform;
import java.awt.geom.Point2D;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class RotatedText extends JPanel {
public void paint(Graphics g) {
Graphics2D g2d = (Graphics2D) g;
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
String s = "111111111111111111111111111111";
Font font = new Font("Courier", Font.PLAIN, 12);
g2d.translate(20, 20);
FontRenderContext frc = g2d.getFontRenderContext();
GlyphVector gv = font.createGlyphVector(frc, s);
int length = gv.getNumGlyphs();
for (int i = 0; i < length; i++) {
Point2D p = gv.getGlyphPosition(i);
AffineTransform at = AffineTransform.getTranslateInstance(p.getX(), p.getY());
at.rotate((double) i / (double) (length - 1) * Math.PI / 3);
Shape glyph = gv.getGlyphOutline(i);
Shape transformedGlyph = at.createTransformedShape(glyph);
g2d.fill(transformedGlyph);
}
}
public static void main(String[] args) {
JFrame frame = new JFrame("Rotated text");
frame.add(new RotatedText());
frame.setSize(400, 300);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
}</source>



== Rotates a shape about the specified coordinates. ==



<source lang="java">
/*
* JCommon : a free general purpose class library for the Java(tm) platform
*
*
* (C) Copyright 2000-2008, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jcommon/index.html
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* -------------------
* ShapeUtilities.java
* -------------------
* (C)opyright 2003-2008, by Object Refinery Limited and Contributors.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* $Id: ShapeUtilities.java,v 1.18 2008/06/02 06:58:28 mungady Exp $
*
* Changes
* -------
* 13-Aug-2003 : Version 1 (DG);
* 16-Mar-2004 : Moved rotateShape() from RefineryUtilities.java to here (DG);
* 13-May-2004 : Added new shape creation methods (DG);
* 30-Sep-2004 : Added createLineRegion() method (DG);
* Moved drawRotatedShape() method from RefineryUtilities class
* to this class (DG);
* 04-Oct-2004 : Renamed ShapeUtils --> ShapeUtilities (DG);
* 26-Oct-2004 : Added a method to test the equality of two Line2D
* instances (DG);
* 10-Nov-2004 : Added new translateShape() and equal(Ellipse2D, Ellipse2D)
* methods (DG);
* 11-Nov-2004 : Renamed translateShape() --> createTranslatedShape() (DG);
* 07-Jan-2005 : Minor Javadoc fix (DG);
* 11-Jan-2005 : Removed deprecated code in preparation for 1.0.0 release (DG);
* 21-Jan-2005 : Modified return type of RectangleAnchor.coordinates()
* method (DG);
* 22-Feb-2005 : Added equality tests for Arc2D and GeneralPath (DG);
* 16-Mar-2005 : Fixed bug where equal(Shape, Shape) fails for two Polygon
* instances (DG);
* 01-Jun-2008 : Fixed bug in equal(GeneralPath, GeneralPath) method (DG);
*
*/
import java.awt.Shape;
import java.awt.geom.AffineTransform;
import java.awt.geom.Point2D;
/**
* Utility methods for {@link Shape} objects.
*
* @author David Gilbert
*/
public class Main {
/**
* Rotates a shape about the specified coordinates.
*
* @param base the shape (<code>null</code> permitted, returns
* <code>null</code>).
* @param angle the angle (in radians).
* @param x the x coordinate for the rotation point (in Java2D space).
* @param y the y coordinate for the rotation point (in Java2D space).
*
* @return the rotated shape.
*/
public static Shape rotateShape(final Shape base, final double angle,
final float x, final float y) {
if (base == null) {
return null;
}
final AffineTransform rotate = AffineTransform.getRotateInstance(
angle, x, y);
final Shape result = rotate.createTransformedShape(base);
return result;
}
}</source>



== Rotating image using Java 2D AffineTransform class ==



<source lang="java">
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Rectangle;
import java.awt.geom.AffineTransform;
import javax.swing.JPanel;
class ImagePanel extends JPanel {
int offset = 5;
private Image image;
private int angle;
private int w, h;
private AffineTransform transform;
public ImagePanel(Image i) {
image = i;
w = image.getWidth(this);
h = image.getHeight(this);
transform = new AffineTransform();
}
public void paintComponent(Graphics grp) {
Rectangle rect = this.getBounds();
Graphics2D g2d = (Graphics2D) grp;
transform.setToTranslation((rect.width - w) / 2,
(rect.height - h) / 2);
transform.rotate(Math.toRadians(angle), w / 2,
h / 2);
g2d.drawImage(image, transform, this);
}
public void rotate() {
angle -= offset;
if (angle <= 0) {
angle = 360;
}
repaint();
}
}</source>



== Rotation and coordinate translation ==



<source lang="java">
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Rotate extends JPanel {
public void paint(Graphics g) {
super.paint(g);
Graphics2D g2d = (Graphics2D) g;
g2d.setColor(new Color(150, 150, 150));
g2d.fillRect(20, 20, 80, 50);
g2d.translate(180, -150);
g2d.rotate(Math.PI / 4);
g2d.fillRect(20, 20, 80, 50);
}
public static void main(String[] args) {
JFrame frame = new JFrame("Rotation");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new Rotate());
frame.setSize(300, 200);
frame.setVisible(true);
}
}</source>



== Scaling an object ==



<source lang="java">
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Scale extends JPanel {
public void paint(Graphics g) {
super.paint(g);
Graphics2D g2d = (Graphics2D) g;
g2d.setColor(new Color(150, 150, 150));
g2d.fillRect(0, 0, 80, 50);
AffineTransform tx1 = new AffineTransform();
tx1.translate(110, 20);
tx1.scale(0.5, 0.5);
g2d.setTransform(tx1);
g2d.fillRect(0, 0, 80, 50);
AffineTransform tx2 = new AffineTransform();
tx2.translate(200, 20);
tx2.scale(1.5, 1.5);
g2d.setTransform(tx2);
g2d.fillRect(0, 0, 80, 50);
}
public static void main(String[] args) {
JFrame frame = new JFrame("Scaling");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new Scale());
frame.setSize(330, 160);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
}</source>



== Tranformation with AffineTransform.getScaleInstance ==



<source lang="java">
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
public class AffineTransformGetScaleInstance extends Frame {
public static void main(String[] args) {
(new AffineTransformGetScaleInstance()).setVisible(true);
}
public AffineTransformGetScaleInstance() {
setSize(350, 300);
}
public void paint(Graphics g) {
AffineTransform atrans = null;
Graphics2D g2d = (Graphics2D) g;
atrans = AffineTransform.getScaleInstance(2, 3);
if (atrans != null)
g2d.setTransform(atrans);
g2d.fillRect(50, 50, 100, 50);
}
}</source>



== Tranformation with AffineTransform.getShearInstance ==



<source lang="java">
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
public class AffineTransformGetShearInstance extends Frame {
public static void main(String[] args) {
(new AffineTransformGetShearInstance()).setVisible(true);
}
public AffineTransformGetShearInstance() {
setSize(350, 300);
}
public void paint(Graphics g) {
AffineTransform atrans = null;
Graphics2D g2d = (Graphics2D) g;
atrans = AffineTransform.getShearInstance(.1, .5);
if (atrans != null)
g2d.setTransform(atrans);
g2d.fillRect(50, 50, 100, 50);
}
}</source>



== Tranformation with AffineTransform.getTranslateInstance ==



<source lang="java">
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
public class AffineTransformGetTranslateInstance extends Frame {
public static void main(String[] args) {
(new AffineTransformGetTranslateInstance()).setVisible(true);
}
public AffineTransformGetTranslateInstance() {
setSize(350, 300);
}
public void paint(Graphics g) {
AffineTransform atrans = null;
Graphics2D g2d = (Graphics2D) g;
atrans = AffineTransform.getTranslateInstance(50, 100);
if (atrans != null)
g2d.setTransform(atrans);
g2d.fillRect(50, 50, 100, 50);
}
}</source>



== Transform Lab ==



<source lang="java">
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
public class AffineTransformGetRotateInstance extends Frame {
public static void main(String[] args) {
(new AffineTransformGetRotateInstance()).setVisible(true);
}
public AffineTransformGetRotateInstance() {
setSize(350, 300);
}
public void paint(Graphics g) {
AffineTransform atrans = null;
Graphics2D g2d = (Graphics2D) g;
atrans = AffineTransform.getRotateInstance(Math.PI / 4, 50, 50);
if (atrans != null)
g2d.setTransform(atrans);
g2d.fillRect(50, 50, 100, 50);
}
}</source>



== Translate and rotate all objects ==



<source lang="java">
import java.awt.AlphaComposite;
import java.awt.BasicStroke;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.Toolkit;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.geom.Ellipse2D;
import java.awt.geom.RoundRectangle2D;
import javax.swing.JComponent;
import javax.swing.JFrame;
public class Main extends JComponent {
private Image image;
private int theta;
public Main() {
image = Toolkit.getDefaultToolkit().getImage("A.jpg");
theta = 0;
addMouseListener(new MouseAdapter() {
public void mousePressed(MouseEvent me) {
theta = (theta + 15) % 360;
repaint();
}
});
}
public void paint(Graphics g) {
Graphics2D g2 = (Graphics2D) g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
int cx = getSize().width / 2;
int cy = getSize().height / 2;
g2.translate(cx, cy);
g2.rotate(theta * Math.PI / 180);
Shape oldClip = g2.getClip();
Shape e = new Ellipse2D.Float(-cx, -cy, cx * 2, cy * 2);
g2.clip(e);
Shape c = new Ellipse2D.Float(-cx, -cy, cx * 3 / 4, cy * 2);
g2.setPaint(new GradientPaint(40, 40, Color.blue, 60, 50, Color.white, true));
g2.fill(c);
g2.setPaint(Color.yellow);
g2.fillOval(cx / 4, 0, cx, cy);
g2.setClip(oldClip);
g2.setFont(new Font("Times New Roman", Font.PLAIN, 64));
g2.setPaint(new GradientPaint(-cx, 0, Color.red, cx, 0, Color.black, false));
g2.drawString("Hello, 2D!", -cx * 3 / 4, cy / 4);
AlphaComposite ac = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, (float) .75);
g2.setComposite(ac);
Shape r = new RoundRectangle2D.Float(0, -cy * 3 / 4, cx * 3 / 4, cy * 3 / 4, 20, 20);
g2.setStroke(new BasicStroke(4));
g2.setPaint(Color.magenta);
g2.fill(r);
g2.setPaint(Color.green);
g2.draw(r);
g2.drawImage(image, -cx / 2, -cy / 2, this);
}
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.add(new Main(), BorderLayout.CENTER);
frame.setSize(300, 300);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}</source>

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в 17:44, 31 мая 2010

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