Java by API/java.awt.geom/AffineTransform

AffineTransform: createTransformedShape(Shape pSrc)

import java.awt.Container;
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.JComponent;
import javax.swing.JFrame;
public class MainClass {
  public static void main(String[] args) {
    JFrame jf = new JFrame("Demo");
    Container cp = jf.getContentPane();
    MyCanvas tl = new MyCanvas();
    cp.add(tl);
    jf.setSize(300, 200);
    jf.setVisible(true);
  }
}
class MyCanvas extends JComponent {
  public void paint(Graphics g) {
    Graphics2D g2 = (Graphics2D) g;
    g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
    String s = "www.jexp.ru www.jexp.ru";
    Font font = new Font("Serif", Font.PLAIN, 24);
    FontRenderContext frc = g2.getFontRenderContext();
    g2.translate(40, 80);
    GlyphVector gv = font.createGlyphVector(frc, s);
    int length = gv.getNumGlyphs();
    for (int i = 0; i < length; i++) {
      Point2D p = gv.getGlyphPosition(i);
      double theta = (double) i / (double) (length - 1) * Math.PI / 4;
      AffineTransform at = AffineTransform.getTranslateInstance(p.getX(), p.getY());
      at.rotate(theta);
      Shape glyph = gv.getGlyphOutline(i);
      Shape transformedGlyph = at.createTransformedShape(glyph);
      g2.fill(transformedGlyph);
    }
  }
}

AffineTransform: getRotateInstance(double theta)

import java.awt.Container;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Shape;
import java.awt.geom.AffineTransform;
import java.awt.geom.Rectangle2D;
import javax.swing.JComponent;
import javax.swing.JFrame;
public class MainClass{
  public static void main(String[] args) {
    JFrame jf = new JFrame("Demo");
    Container cp = jf.getContentPane();
    MyCanvas tl = new MyCanvas();
    cp.add(tl);
    jf.setSize(300, 200);
    jf.setVisible(true);
  }
}
class MyCanvas extends JComponent {
  public void paint(Graphics g) {
    Shape shape = new Rectangle2D.Float(100, 50, 80, 80);
    
    Graphics2D g2 = (Graphics2D) g;

    AffineTransform at = AffineTransform.getRotateInstance(-Math.PI / 6);    
    
    g2.setTransform(at);
    g2.draw(shape);
    
  }
}

AffineTransform: getRotateInstance(double theta, double x, double y)

import java.awt.Container;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Shape;
import java.awt.geom.AffineTransform;
import java.awt.geom.Rectangle2D;
import javax.swing.JComponent;
import javax.swing.JFrame;
public class MainClass{
  public static void main(String[] args) {
    JFrame jf = new JFrame("Demo");
    Container cp = jf.getContentPane();
    MyCanvas tl = new MyCanvas();
    cp.add(tl);
    jf.setSize(300, 200);
    jf.setVisible(true);
  }
}
class MyCanvas extends JComponent {
  public void paint(Graphics g) {
    Shape shape = new Rectangle2D.Float(100, 50, 80, 80);
    
    Graphics2D g2 = (Graphics2D) g;
    float cm = 72 / 2.54f;
    AffineTransform at = AffineTransform.getRotateInstance(-Math.PI / 6, 3 * cm, 2 * cm);    
    
    g2.setTransform(at);
    g2.draw(shape);
    
  }
}

AffineTransform: getTranslateInstance(double tx, double ty)

import java.awt.Color;
import java.awt.Container;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.geom.AffineTransform;
import java.awt.geom.Rectangle2D;
import javax.swing.JComponent;
import javax.swing.JFrame;
public class MainClass{
  public static void main(String[] args) {
    JFrame jf = new JFrame("Demo");
    Container cp = jf.getContentPane();
    MyCanvas tl = new MyCanvas();
    cp.add(tl);
    jf.setSize(300, 200);
    jf.setVisible(true);
  }
}
class MyCanvas extends JComponent {
  Shape shape;
  public MyCanvas() {
    shape = create();
  }
  protected Shape create() {
    float cm = 72 / 2.54f;
    return new Rectangle2D.Float(cm, cm, 2 * cm, cm);
  }

  public void paint(Graphics g) {
    Graphics2D g2 = (Graphics2D) g;
    g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
    
    g2.setPaint(Color.black);
    g2.draw(shape);
    
    AffineTransform at = AffineTransform.getTranslateInstance(75, 75);
    g2.transform(at);
    g2.setPaint(Color.red);
    g2.draw(shape);
    
  }
}

AffineTransform: setToRotation(double theta)

import java.awt.Container;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Shape;
import java.awt.geom.AffineTransform;
import java.awt.geom.Rectangle2D;
import javax.swing.JComponent;
import javax.swing.JFrame;
public class MainClass{
  public static void main(String[] args) {
    JFrame jf = new JFrame("Demo");
    Container cp = jf.getContentPane();
    MyCanvas tl = new MyCanvas();
    cp.add(tl);
    jf.setSize(300, 200);
    jf.setVisible(true);
  }
}
class MyCanvas extends JComponent {
  public void paint(Graphics g) {
    Shape shape = new Rectangle2D.Float(100, 50, 80, 80);
    
    Graphics2D g2 = (Graphics2D) g;

    AffineTransform at = new AffineTransform();
    at.setToRotation(Math.PI / 6);
    at.translate(100, 0); 
    
    g2.setTransform(at);
    g2.draw(shape);
    
  }
}

AffineTransform: setToTranslation(double tx, double ty)

import java.awt.Color;
import java.awt.Container;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.geom.AffineTransform;
import java.awt.geom.Rectangle2D;
import javax.swing.JComponent;
import javax.swing.JFrame;
public class MainClass{
  public static void main(String[] args) {
    JFrame jf = new JFrame("Demo");
    Container cp = jf.getContentPane();
    MyCanvas tl = new MyCanvas();
    cp.add(tl);
    jf.setSize(300, 200);
    jf.setVisible(true);
  }
}
class MyCanvas extends JComponent {
  Shape shape;
  public MyCanvas() {
    shape = create();
  }
  protected Shape create() {
    float cm = 72 / 2.54f;
    return new Rectangle2D.Float(cm, cm, 2 * cm, cm);
  }

  public void paint(Graphics g) {
    Graphics2D g2 = (Graphics2D) g;
   
    g2.setPaint(Color.black);
    g2.draw(shape);
    
    AffineTransform trans = new AffineTransform();
    trans.setToTranslation(30, 3);
    g2.transform(trans);
    g2.setPaint(Color.red);
    g2.draw(shape);
    
  }
}

AffineTransform: shear(double shx, double shy)

import java.awt.Container;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Shape;
import java.awt.geom.AffineTransform;
import java.awt.geom.Rectangle2D;
import javax.swing.JComponent;
import javax.swing.JFrame;
public class MainClass{
  public static void main(String[] args) {
    JFrame jf = new JFrame("Demo");
    Container cp = jf.getContentPane();
    MyCanvas tl = new MyCanvas();
    cp.add(tl);
    jf.setSize(300, 200);
    jf.setVisible(true);
  }
}
class MyCanvas extends JComponent {
  public void paint(Graphics g) {
    Shape shape = new Rectangle2D.Float(100, 50, 80, 80);
    
    Graphics2D g2 = (Graphics2D) g;
    AffineTransform at = new AffineTransform();
    at.shear(-.5, 0);
    
    g2.setTransform(at);
    g2.draw(shape);
    
  }
}

AffineTransform: translate(double tx, double ty)

import java.awt.Container;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Shape;
import java.awt.geom.AffineTransform;
import java.awt.geom.Rectangle2D;
import javax.swing.JComponent;
import javax.swing.JFrame;
public class MainClass{
  public static void main(String[] args) {
    JFrame jf = new JFrame("Demo");
    Container cp = jf.getContentPane();
    MyCanvas tl = new MyCanvas();
    cp.add(tl);
    jf.setSize(300, 200);
    jf.setVisible(true);
  }
}
class MyCanvas extends JComponent {
  public void paint(Graphics g) {
    Shape shape = new Rectangle2D.Float(100, 50, 80, 80);
    
    Graphics2D g2 = (Graphics2D) g;

    AffineTransform at = new AffineTransform();
    at.setToRotation(Math.PI / 6);
    at.translate(100, 0); 
    
    g2.setTransform(at);
    g2.draw(shape);
    
  }
}