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JAVA 2D ile Grafik Programlama 2

Muallim-i Ali

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Yazan : Aybars UĞUR

JAVA 2D ÖRNEK 1 : Dikdörtgenler ve Yazıları

import java.awt.*;
import java.awt.geom.*;

public class ornek1 extends ApplicationFrame 
{

  public static void main(String[] args)
  {
	ornek1 f = new ornek1();
	f.setTitle("Örnek 1.1");
	f.setSize(350,200);
	f.center(); f.setVisible(true);
  }  

  public void paint(Graphics g)
  {
	Graphics2D g2 = (Graphics2D)g;

	double x=30, y=80, w=50, h=75;
	Rectangle2D r1 = new Rectangle2D.Double(x,y,w,h);
	g2.draw(r1);
	Rectangle2D r2 = new Rectangle2D.Double(x+75,y,w,h);
	g2.fill(r2);

	Font font1 = new Font("Serif",Font.PLAIN,15);
	g2.setFont(font1);
	g2.drawString("Dikdörtgen",30,75);
	g2.drawString("Içi Dolu",105,58);
	g2.drawString("Dikdörtgen",105,75);

	g2.setColor(Color.blue);

	RoundRectangle2D rr1 = new RoundRectangle2D.Double(x+150,y,w,h,30,30);
	g2.draw(rr1);
	RoundRectangle2D rr2 = new RoundRectangle2D.Double(x+225,y,w,h,40,20);
	g2.fill(rr2);

	Font font2 = new Font("Serif",Font.PLAIN,10);
	g2.setFont(font2);
	g2.drawString("Yuvarlatilmis",(int)x+150,65);
	g2.drawString("Dikdörtgen",(int)x+150,75);
	g2.drawString("Içi Dolu",(int)x+225,55);
	g2.drawString("Yuvarlatilmis",(int)x+225,65);
	g2.drawString("Dikdörtgen",(int)x+225,75);

  }  

}
public void paint(Graphics g)
  {
	Graphics2D g2 = (Graphics2D)g;

	double x=30, y=80, w=50, h=75;
	Rectangle2D r1 = new Rectangle2D.Double(x,y,w,h);
	g2.draw(r1);
	Rectangle2D r2 = new Rectangle2D.Double(x+75,y,w,h);
	g2.fill(r2);

	Font font1 = new Font("Serif",Font.PLAIN,15);
	g2.setFont(font1);
	g2.drawString("Dikdörtgen",30,75);
	g2.drawString("Içi Dolu",105,58);
	g2.drawString("Dikdörtgen",105,75);

	g2.setColor(Color.blue);

	RoundRectangle2D rr1 = new RoundRectangle2D.Double(x+150,y,w,h,30,30);
	g2.draw(rr1);
	RoundRectangle2D rr2 = new RoundRectangle2D.Double(x+225,y,w,h,40,20);
	g2.fill(rr2);

	Font font2 = new Font("Serif",Font.PLAIN,10);
	g2.setFont(font2);
	g2.drawString("Yuvarlatilmis",(int)x+150,65);
	g2.drawString("Dikdörtgen",(int)x+150,75);
	g2.drawString("Içi Dolu",(int)x+225,55);
	g2.drawString("Yuvarlatilmis",(int)x+225,65);
	g2.drawString("Dikdörtgen",(int)x+225,75);

  }  [/CODE]

ornek_1_1.gif

[b]JAVA 2D ÖRNEK 2 : Elips, Yay ve Gradient (Renk Geçişi)[/b]

[CODE]public void paint(Graphics g)
{
Graphics2D g2 = (Graphics2D)g;

GradientPaint gp = new GradientPaint(75,75,Color.pink,
95,95,Color.blue,true);
g2.setPaint(gp);

double x=30, y=80, w=50, h=75;

Ellipse2D e1 = new Ellipse2D.Double(x,y,w,h);
g2.draw(e1);

Ellipse2D e2 = new Ellipse2D.Double(x+75,y,w,h);
g2.fill(e2);

Font font1 = new Font("Serif",Font.PLAIN,30);
g2.setFont(font1);
g2.drawString("Elips ve Yay",50,75);

Arc2D arc1 = new Arc2D.Double(x+150,y,w,h,30,120,Arc2D.PIE);
g2.draw(arc1);

Arc2D arc2 = new Arc2D.Double(x+225,y,w,h,-180,120,Arc2D.OPEN);
g2.fill(arc2);

}[/CODE]

ornek_1_2.gif

[b]JAVA 2D ÖRNEK 3 : Eğriler[/b]

[CODE]public void paint(Graphics g)
{
Graphics2D g2 = (Graphics2D)g;

QuadCurve2D qc1 = new QuadCurve2D.Double(10,50,20,100,110,50);
g2.draw(qc1);
QuadCurve2D qc2 = new QuadCurve2D.Double(10,50,120,120,110,50);
g2.draw(qc2);
QuadCurve2D qc3 = new QuadCurve2D.Double(60,150,0,0,110,190);
g2.fill(qc3);

CubicCurve2D cc = new CubicCurve2D.Double(160,30,170,80,280,0,250,190);
g2.setStroke(new BasicStroke(8));
g2.draw(cc);

} [/CODE]

ornek_1_3.gif

[b]JAVA 2D ÖRNEK 4 : Dönüşümler[/b]

[CODE]public void paint(Graphics g)
{
Graphics2D g2 = (Graphics2D)g;

AffineTransform at = new AffineTransform();
at.translate(100,100);

g2.transform(at);

QuadCurve2D qc1 = new QuadCurve2D.Double(0,0,20,15,0,50);
QuadCurve2D qc2 = new QuadCurve2D.Double(0,0,-20,15,0,50);
Color c1 = new Color(175,255,0); g2.setPaint(c1);

for(int i=0; i<6; ++i)
{
at = AffineTransform.getRotateInstance(Math.PI/6);
g2.transform(at);
g2.fill(qc1); g2.fill(qc2);
};

for(int i=0; i<4; ++i)
{
at = AffineTransform.getTranslateInstance(-40,0);
g2.transform(at);
at = AffineTransform.getScaleInstance(1.2,1.2);
g2.transform(at);
g2.fill(qc1); g2.fill(qc2);
};

Font f = new Font("Serif",Font.PLAIN,20); g2.setFont(f);
at.shear(.3,0); g2.transform(at);
g2.drawString("Transformation",0,-20);

}
[/CODE]

ornek_1_4.gif

Şekil 4 : Dönüşümler (Transformations) : Döndürme (Rotation), Yer Değiştirme (Translation), Ölçeklendirme (Scaling) ve Shear

[b]JAVA 2D ÖRNEK 5 : Resim görüntüleme, Alfa parametresi, yazılara ve şekillere doku kaplama[/b]

[CODE]public class ornek5_1 extends Component
{
public static void main(String[] args)
{
ApplicationFrame f = new ApplicationFrame("Örnek 5");
f.setLayout(new BorderLayout());
Component c = new ornek5_1();
f.add(c, BorderLayout.CENTER);
f.setSize(525,400);
f.center();
f.setVisible(true);
}

private BufferedImage mimage;
private Image image1,image2;

public void paint(Graphics g)
{
Graphics2D g2 = (Graphics2D)g;
if(mimage==null) createOffscreenImage();
g2.drawImage(mimage,0,0,this);


// Araba resmi
image1 = Toolkit.getDefaultToolkit().getImage("cab.gif");
g2.drawImage(image1,0,0,null);

Composite c = AlphaComposite.getInstance(AlphaComposite.SRC_OVER,.5f);
g2.setComposite(c);

// Alfa parametresi ile yarı saydam kaplan resmi
image2 = Toolkit.getDefaultToolkit().getImage("BigTiger.gif");
g2.drawImage(image2,100,50,180,180,this);

}

private void createOffscreenImage()
{
Dimension d = getSize();
int w = d.width, h = d.height;

// Dünya haritası resmi
mimage = new BufferedImage(w,h,BufferedImage.TYPE_INT_RGB);
Graphics2D g2 = mimage.createGraphics();
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
try {
String filename = "earth.jpg";
InputStream in = getClass().getResourceAsStream(filename);
JPEGImageDecoder decoder = JPEGCodec.createJPEGDecoder(in);
BufferedImage image = decoder.decodeAsBufferedImage();
in.close();
g2.drawImage(image,0,0,w,h,null);
}
catch (Exception e) { System.out.print(e); }

// Elipsler
g2.setStroke(new BasicStroke(2));
Color[] colors = { Color.red, Color.blue, Color.green };
for(int i=-32; i<40; i+=8)
{
g2.setPaint(colors[Math.abs(i)%3]);
g2.drawOval(i,i,w-i*2,h-i*2);
};

// Resim dokusu kaplanmış bir kare ve yazı
Rectangle2D tr = new Rectangle2D.Double(50,10,
50,50);
g2.setFont(new Font("Serif",Font.BOLD,94));
TexturePaint tp = new TexturePaint(mimage,tr);
g2.setPaint(tp);
g2.drawString("WORLD",50,250);
g2.fill(tr);

}
}[/CODE]

ornek_1_5.gif

Şekil 5 : Resim görüntüleme (dünya haritası, kaplan ve araba), Alfa parametresi (yarı saydam kaplan resmi), yazılara (ortadaki world yazısı) ve şekillere (sol üst köşedeki küçük dikdörtgen dünya haritası) doku kaplama

[b]JAVA 2D ÖRNEK 6 : Fare kullanarak bir çizgi ve elipsin hareket ettirilmesini sağlayan Java2D programı[/b]

[CODE]import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;

public class ornek6 extends ApplicationFrame
implements MouseListener, MouseMotionListener
{
public static void main(String[] args)
{
new ornek6();
}

protected Point2D[] noktalar;
protected Point2D etkinnokta;

public ornek6()
{
super("FARE v1.0");
setSize(250,250);
center();

noktalar = new Point2D[4];
noktalar[0] = new Point2D.Double(50,50);
noktalar[1] = new Point2D.Double(100,100);
noktalar[2] = new Point2D.Double(50,150);
noktalar[3] = new Point2D.Double(100,200);
etkinnokta = null;

// Fare İşlemlerinin Dinlenmesi
addMouseListener(this);
addMouseMotionListener(this);

setVisible(true);
}

public void paint(Graphics g)
{
Graphics2D g2 = (Graphics2D)g;

Line2D cizgi1 = new Line2D.Double(noktalar[0],noktalar[1]);
g2.draw(cizgi1);

Ellipse2D elips1 = new Ellipse2D.Double(
noktalar[2].getX(), noktalar[2].getY(),
noktalar[3].getX()-noktalar[2].getX(),
noktalar[3].getY()-noktalar[2].getY());
g2.draw(elips1);

for(int i=0; i>noktalar.length;i++)
{
if(noktalar[i]==etkinnokta)
g2.setPaint(Color.red);
else
g2.setPaint(Color.blue);
g2.fill(getControlPoint(noktalar[i]));
}
}

protected Shape getControlPoint(Point2D p)
{
int kenar = 4;
return new Rectangle2D.Double(
p.getX()-kenar/2, p.getY()-kenar/2,
kenar,kenar);
}

public void mouseClicked(MouseEvent me) {}
public void mousePressed(MouseEvent me)
{
etkinnokta = null;
for(int i=0; i<noktalar.length; ++i)
{
Shape s = getControlPoint(noktalar[i]);
if(s.contains(me.getPoint()))
{
etkinnokta = noktalar[i]; break;
}
}
repaint();
}

public void mouseReleased(MouseEvent me) {}
public void mouseMoved(MouseEvent me) {}
public void mouseDragged(MouseEvent me)
{
if(etkinnokta!=null)
{
etkinnokta.setLocation(me.getPoint());
repaint();
}
}

public void mouseEntered(MouseEvent me) {}
public void mouseExited(MouseEvent me) {}

}[/CODE]

ornek_1_6.gif

Şekil 6 : Bir çizginin uç noktalarının yerlerinin ve bir elipsin boyutlarının değiştirilmesini sağlayan Java 2D programının Applet penceresi

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