Java2D : translation, rotation et changement de taille

**Grand sorcier** · 06/04/2006, 14h39

Salut,

Je me mets à la programmation graphique sous Java.
Et j'avais envie de partager les quelques lignes
de code que j'ai réussi à ecrire

Code :

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import static java.lang.Math.PI;
import java.util.Vector;
import java.lang.Thread;
import java.lang.InterruptedException;
import java.awt.Toolkit;
import java.awt.geom.AffineTransform;
import java.awt.geom.Point2D;
import java.awt.geom.Point2D.Double;
import java.awt.Polygon;
import java.awt.Container;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Rectangle;
import javax.swing.JPanel;
import javax.swing.JFrame;
 
public class SimpleFrame
{
	/**
         * @param args
         */
	public static void main (String[] args)
	{
		/**
                 */
		Toolkit tk = Toolkit.getDefaultToolkit ();
		Dimension d = tk.getScreenSize();
		int screenH = d.height;
		int screenW = d.width;
 
		/**
                 */
		MyFrame simpleFrame = new MyFrame ();
	}
}
 
class MyFrame extends JFrame
{
	public MyFrame ()
	{
		/**
                 */
		GraphicsEnvironment graphicEnv = GraphicsEnvironment.getLocalGraphicsEnvironment();
		GraphicsDevice[] graphicDevices = graphicEnv.getScreenDevices ();
		GraphicsConfiguration graphicConf = graphicDevices[0].getDefaultConfiguration();
		Rectangle screenBounds = graphicConf.getBounds ();
 
		/**
                 */		
		setTitle ("Simple Frame");
		setSize (screenBounds.width/3, screenBounds.height/3);
		setLocationRelativeTo (null);
		setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
 
		/**
                 */
		Container container = getContentPane ();
		MyPanel panel = new MyPanel ();
		container.add (panel);
		setVisible (true);
		panel.anime ();
	}
 
	private static final long serialVersionUID = 0;
}
 
class MyPanel extends JPanel
{
	public void anime ()
	{
		while (true)
		{
			for (int i = 0; i < 100; i++)
			{
				polygon.translate (1, 1);
				polygon.rotate (2);
				repaint ();
				try
				{
					Thread.sleep (5);
				}
				catch (InterruptedException e)
				{
					e.printStackTrace ();
				}
			}
			for (int i = 0; i < 200; i++)
			{
				polygon.scale (0.99, 0.99);
				repaint ();
				try
				{
					Thread.sleep (5);
				}
				catch (InterruptedException e)
				{
					e.printStackTrace ();
				}
			}
			for (int i = 0; i < 200; i++)
			{
				polygon.scale (1.0101, 1.0101);
				repaint ();
				try
				{
					Thread.sleep (5);
				}
				catch (InterruptedException e)
				{
					e.printStackTrace ();
				}
			}
			for (int i = 0; i < 100; i++)
			{
				polygon.translate (1, -1);
				polygon.rotate (2);
				repaint ();
				try
				{
					Thread.sleep (5);
				}
				catch (InterruptedException e)
				{
					e.printStackTrace ();
				}
			}	
			for (int i = 0; i < 200; i++)
			{
				polygon.translate (-1, 0);
				polygon.rotate (2);
				repaint ();
				try
				{
					Thread.sleep (5);
				}
				catch (InterruptedException e)
				{
					e.printStackTrace ();
				}
			}
		}
	}
 
	public void paintComponent (Graphics g)
	{
		super.paintComponent (g);
		Graphics2D g2 = (Graphics2D) g;
		AffineTransform affineBackup = g2.getTransform ();
		AffineTransform rotate45 = AffineTransform.getRotateInstance (PI/4.0, 0.0, 0.0);
 
		g2.drawPolygon (polygon);
		g2.drawArc (polygon.getCenterX(), polygon.getCenterY(), 5, 5, 0, 360);
 
		g2.setTransform (affineBackup);
	}
 
	public MyPanel ()
	{
		setBackground (Color.white);
		setForeground (Color.blue);
 
		polygon = new MyPolygon (new Point2D.Double (50, 50),
			new Point2D.Double (70, 10),
			new Point2D.Double (80, 30),
			new Point2D.Double (90, 10),
			new Point2D.Double (130, 50),
			new Point2D.Double (90, 130),
			new Point2D.Double (70, 70),
			new Point2D.Double (50, 90)
			);		
	}
 
	private MyPolygon polygon = null;
	private static final long serialVersionUID = 0;
}
 
class MyPolygon extends Polygon
{
	public MyPolygon (Point2D.Double... points)
	{
		super ();
		this.points = new Vector<Point2D.Double> ();
 
		for (int i = 0; i < points.length; i++)
		{
			this.points.add (points[i]);
			addPoint ((int) points[i].getX(), (int) points[i].getY());
		}
		updateCenter ();
	}
 
 
	public void scale (double sx, double sy)
	{
		AffineTransform rotation = AffineTransform.getScaleInstance (sx, sy);
		for (Point2D.Double point : points)
		{
			rotation.transform (point, point);
		}
		reset ();
		for (Point2D.Double point : points)
		{
			addPoint ((int) point.getX(), (int) point.getY());
		}
 
		double previousX = centerX;
		double previousY = centerY;
 
		updateCenter ();
		double currentX = centerX;
		double currentY = centerY;
		double deltaX = previousX - currentX;
		double deltaY = previousY - currentY;
 
		translate ((int) deltaX, (int) deltaY);
		centerX = previousX;
		centerY = previousY;
	}
 
	public void rotate (double degree)
	{
		AffineTransform rotation = AffineTransform.getRotateInstance (Math.toRadians (degree), centerX, centerY);
		for (Point2D.Double point : points)
		{
			rotation.transform (point, point);
		}
		reset ();
		for (Point2D.Double point : points)
		{
			addPoint ((int) point.getX(), (int) point.getY());
		}
	}
 
	public void translate (int dx, int dy)
	{
		double x = 0;
		double y = 0;
		for (Point2D.Double point : points)
		{
			x = point.getX() + dx;
			y = point.getY() + dy;
			point.setLocation (x, y);
		}
		reset ();
		for (Point2D.Double point : points)
		{
			addPoint ((int) point.getX(), (int) point.getY());
		}
		updateCenter ();
	}
 
	public void updateCenter ()
	{		
		process :
		{
			if (points.size () <= 0)
			{
				centerX = 0;
				centerY = 0;
				break process;
			}
 
			double xSum = 0;
			double ySum = 0;
			for (Point2D.Double point : points)
			{
				xSum += point.getX();
				ySum += point.getY();
			}
			centerX = xSum / points.size ();
			centerY = ySum / points.size ();
		}
	}
 
	public int getCenterX ()
	{
		return (int) centerX;
	}
 
	public int getCenterY ()
	{
		return (int) centerY;
	}
 
	private Vector<Point2D.Double> points = null;
	private double centerX = 0;
	private double centerY = 0;
	private static final long serialVersionUID = 0;
}

Peut être pourrez-vous m'apprendre des optimisations
ou des manières differentes de coder cet exemple...

**Grand sorcier** · 13/04/2006, 17h25

J'ai relu mon code et j'ai apporté quelques petites modifs....

Code :

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import static java.lang.Math.sin;
import static java.lang.Math.cos;
import static java.lang.Math.toRadians;
import java.util.Vector;
import java.lang.Thread;
import java.lang.InterruptedException;
import java.awt.Toolkit;
import java.awt.geom.AffineTransform;
import java.awt.geom.Point2D;
import java.awt.geom.Point2D.Double;
import java.awt.Polygon;
import java.awt.Container;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Rectangle;
import javax.swing.JPanel;
import javax.swing.JFrame;
 
public class SimpleFrame
{
	/**
         * @param args
         */
	public static void main (String[] args)
	{
		/**
                 */
		Toolkit tk = Toolkit.getDefaultToolkit ();
		Dimension d = tk.getScreenSize();
		int screenH = d.height;
		int screenW = d.width;
 
		/**
                 */
		MyFrame simpleFrame = new MyFrame ();
	}
}
 
class MyFrame extends JFrame
{
	public MyFrame ()
	{
		/**
                 */
		GraphicsEnvironment graphicEnv = GraphicsEnvironment.getLocalGraphicsEnvironment();
		GraphicsDevice[] graphicDevices = graphicEnv.getScreenDevices ();
		GraphicsConfiguration graphicConf = graphicDevices[0].getDefaultConfiguration();
		Rectangle screenBounds = graphicConf.getBounds ();
 
		/**
                 */		
		setTitle ("Simple Frame");
		setSize (screenBounds.width/2, screenBounds.height/2);
		setLocationRelativeTo (null);
		setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
 
		/**
                 */
		Container container = getContentPane ();
		MyPanel panel = new MyPanel ();
		container.add (panel);
		setVisible (true);
		panel.anime ();
	}
 
	private static final long serialVersionUID = 0;
}
 
class MyPanel extends JPanel
{
	public void anime ()
	{
		while (true)
		{
			for (int i = 0; i < 100; i++)
			{
				polygon.translate (1, 1);
				polygon.rotate (2);
				polygon.reset ();
				repaint ();
				try
				{
					Thread.sleep (50);
				}
				catch (InterruptedException e)
				{
					e.printStackTrace ();
				}
			}
			for (int i = 0; i < 200; i++)
			{
				polygon.scale (0.99, 0.99);
				polygon.reset ();
				repaint ();
				try
				{
					Thread.sleep (50);
				}
				catch (InterruptedException e)
				{
					e.printStackTrace ();
				}
			}
			for (int i = 0; i < 200; i++)
			{
				polygon.scale (1.0101, 1.0101);
				polygon.reset ();
				repaint ();
				try
				{
					Thread.sleep (50);
				}
				catch (InterruptedException e)
				{
					e.printStackTrace ();
				}
			}
			for (int i = 0; i < 100; i++)
			{
				polygon.translate (1, -1);
				polygon.rotate (-2);
				polygon.reset ();
				repaint ();
				try
				{
					Thread.sleep (50);
				}
				catch (InterruptedException e)
				{
					e.printStackTrace ();
				}
			}	
			for (int i = 0; i < 200; i++)
			{
				polygon.translate (-1, 0);
				polygon.rotate (2);
				polygon.reset ();
				repaint ();
				try
				{
					Thread.sleep (50);
				}
				catch (InterruptedException e)
				{
					e.printStackTrace ();
				}
			}
		}
	}
 
	public void paintComponent (Graphics g)
	{
		super.paintComponent (g);
		Graphics2D g2 = (Graphics2D) g;
		g2.drawPolygon (polygon);
		g2.drawArc (polygon.getCenterX(), polygon.getCenterY(), 5, 5, 0, 360);
	}
 
	public MyPanel ()
	{
		setBackground (Color.white);
		setForeground (Color.blue);
 
		polygon = new MyPolygon (new Point2D.Double (50, 50),
			new Point2D.Double (70, 10),
			new Point2D.Double (80, 30),
			new Point2D.Double (90, 10),
			new Point2D.Double (130, 50),
			new Point2D.Double (90, 130),
			new Point2D.Double (70, 70),
			new Point2D.Double (50, 90)
			);		
	}
 
	private MyPolygon polygon = null;
	private static final long serialVersionUID = 0;
}
 
class MyPolygon extends Polygon
{
	public MyPolygon (Point2D.Double... points)
	{
		super ();
		this.points = new Vector<Point2D.Double> ();
 
		for (int i = 0; i < points.length; i++)
		{
			this.points.add (points[i]);
			addPoint ((int) points[i].getX(), (int) points[i].getY());
		}
		updateCenter ();
	}
 
	public void scale (double sx, double sy)
	{
		double previousX = centerX;
		double previousY = centerY;
		double x = 0;
		double y = 0;
		for (Point2D.Double point : points)
		{
			x = point.getX() * sx;
			y = point.getY() * sy;
			point.setLocation (x, y);
		}
		updateCenter ();
 
		double deltaX = previousX - centerX;
		double deltaY = previousY - centerY;
		translate ((int) deltaX, (int) deltaY);
		centerX = previousX;
		centerY = previousY;
	}
 
	public void rotate (double degree)
	{
		double x = 0;
		double y = 0;	
		for (Point2D.Double point : points)
		{			
			x = (point.getX()-centerX)*cos(toRadians(degree))
			- (point.getY()-centerY)*sin(toRadians(degree))
			+ centerX;
 
			y = (point.getX()-centerX)*sin(toRadians(degree))
			+ (point.getY()-centerY)*cos(toRadians(degree))
			+ centerY;
 
			point.setLocation (x, y);
		}
	}
 
	public void translate (int dx, int dy)
	{
		double x = 0;
		double y = 0;
		for (Point2D.Double point : points)
		{
			x = point.getX() + dx;
			y = point.getY() + dy;
			point.setLocation (x, y);
		}
		centerX += dx;
		centerY += dy;
	}
 
	public void updateCenter ()
	{		
		process :
		{
			if (points.size() <= 0)
			{
				centerX = 0;
				centerY = 0;
				break process;
			}
 
			double xSum = 0;
			double ySum = 0;
			for (Point2D.Double point : points)
			{
				xSum += point.getX();
				ySum += point.getY();
			}
			centerX = xSum / points.size();
			centerY = ySum / points.size();
		}
	}
 
	public void reset ()
	{
		super.reset ();
		for (Point2D.Double point : points)
		{
			addPoint ((int) point.getX(), (int) point.getY());
		}
	}
 
	public int getCenterX ()
	{
		return (int) centerX;
	}
 
	public int getCenterY ()
	{
		return (int) centerY;
	}
 
	private Vector<Point2D.Double> points = null;
	private double centerX = 0;
	private double centerY = 0;
	private static final long serialVersionUID = 0;
}

Java2D : translation, rotation et changement de taille

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