Source Code : Line transformation, rotation, shear,scale

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Line transformation, rotation, shear,scale

   

import java.awt.BasicStroke;
import java.awt.BorderLayout;
import java.awt.Canvas;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GridLayout;
import java.awt.geom.Line2D;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

public class House extends JPanel {
  MyCanvas canvas;

  JSlider sliderTransX, sliderTransY, sliderRotateTheta, sliderRotateX,
      sliderRotateY, sliderScaleX, sliderScaleY, sliderWidth;

  double transX = 0.0;

  double transY = 0.0;

  double rotateTheta = 0.0;

  double rotateX = 150.0;

  double rotateY = 150.0;

  double scaleX = 1.0;

  double scaleY = 1.0;

  float width = 1.0f;

  public House() {
    super(new BorderLayout());
    JPanel controlPanel = new JPanel(new GridLayout(3, 3));
    add(controlPanel, BorderLayout.NORTH);

    controlPanel.add(new JLabel("Translate(dx,dy): "));

    sliderTransX = setSlider(controlPanel, JSlider.HORIZONTAL, 0, 300, 150,
        100, 50);
    sliderTransY = setSlider(controlPanel, JSlider.HORIZONTAL, 0, 300, 150,
        100, 50);

    // To control rotation
    controlPanel.add(new JLabel("Rotate(Theta,ox,oy): "));
    sliderRotateTheta = setSlider(controlPanel, JSlider.HORIZONTAL, 0, 360,
        0, 90, 45);

    JPanel subPanel = new JPanel();
    subPanel.setLayout(new GridLayout(1, 2));

    sliderRotateX = setSlider(subPanel, JSlider.HORIZONTAL, 0, 300, 150,
        150, 50);

    sliderRotateY = setSlider(subPanel, JSlider.HORIZONTAL, 0, 300, 150,
        150, 50);
    controlPanel.add(subPanel);

    // To control scaling
    controlPanel.add(new JLabel("Scale(sx,sy)x10E-2:"));

    sliderScaleX = setSlider(controlPanel, JSlider.HORIZONTAL, 0, 200, 100,
        100, 10);

    sliderScaleY = setSlider(controlPanel, JSlider.HORIZONTAL, 0, 200, 100,
        100, 10);

    // To control width of line segments
    JLabel label4 = new JLabel("Width Control:", JLabel.RIGHT);
    sliderWidth = new JSlider(JSlider.HORIZONTAL, 0, 20, 1);
    sliderWidth.setPaintTicks(true);
    sliderWidth.setMajorTickSpacing(5);
    sliderWidth.setMinorTickSpacing(1);
    sliderWidth.setPaintLabels(true);
    sliderWidth.addChangeListener(new ChangeListener() {
      public void stateChanged(ChangeEvent e) {
        width = sliderWidth.getValue();
        canvas.repaint();
      }
    });
    JPanel widthPanel = new JPanel();
    widthPanel.setLayout(new GridLayout(1, 2));
    widthPanel.add(label4);
    widthPanel.add(sliderWidth);
    add(widthPanel, BorderLayout.SOUTH);

    canvas = new MyCanvas();
    add(canvas, "Center");
  }

  public JSlider setSlider(JPanel panel, int orientation, int minimumValue,
      int maximumValue, int initValue, int majorTickSpacing,
      int minorTickSpacing) {
    JSlider slider = new JSlider(orientation, minimumValue, maximumValue,
        initValue);
    slider.setPaintTicks(true);
    slider.setMajorTickSpacing(majorTickSpacing);
    slider.setMinorTickSpacing(minorTickSpacing);
    slider.setPaintLabels(true);
    slider.addChangeListener(new ChangeListener() {
      public void stateChanged(ChangeEvent e) {
        JSlider tempSlider = (JSlider) e.getSource();

        if (tempSlider.equals(sliderTransX)) {
          transX = sliderTransX.getValue() - 150.0;
          canvas.repaint();
        } else if (tempSlider.equals(sliderTransY)) {
          transY = sliderTransY.getValue() - 150.0;
          canvas.repaint();
        } else if (tempSlider.equals(sliderRotateTheta)) {
          rotateTheta = sliderRotateTheta.getValue() * Math.PI / 180;
          canvas.repaint();
        } else if (tempSlider.equals(sliderRotateX)) {
          rotateX = sliderRotateX.getValue();
          canvas.repaint();
        } else if (tempSlider.equals(sliderRotateY)) {
          rotateY = sliderRotateY.getValue();
          canvas.repaint();
        } else if (tempSlider.equals(sliderScaleX)) {
          if (sliderScaleX.getValue() != 0.0) {
            scaleX = sliderScaleX.getValue() / 100.0;
            canvas.repaint();
          }
        } else if (tempSlider.equals(sliderScaleY)) {
          if (sliderScaleY.getValue() != 0.0) {
            scaleY = sliderScaleY.getValue() / 100.0;
            canvas.repaint();
          }
        }
      }
    });
    panel.add(slider);

    return slider;
  }

  class MyCanvas extends Canvas {
    public void paint(Graphics g) {
      Graphics2D g2D = (Graphics2D) g;

      g2D.translate(transX, transY);
      g2D.rotate(rotateTheta, rotateX, rotateY);
      g2D.scale(scaleX, scaleY);

      BasicStroke stroke = new BasicStroke(width);
      g2D.setStroke(stroke);

      drawHome(g2D);
    }

    public void drawHome(Graphics2D g2D) {
      Line2D line1 = new Line2D.Float(100f, 200f, 200f, 200f);
      Line2D line2 = new Line2D.Float(100f, 200f, 100f, 100f);
      Line2D line3 = new Line2D.Float(100f, 100f, 150f, 50f);
      Line2D line4 = new Line2D.Float(150f, 50f, 200f, 100f);
      Line2D line5 = new Line2D.Float(200f, 100f, 200f, 200f);
      Line2D line6 = new Line2D.Float(140f, 200f, 140f, 150f);
      Line2D line7 = new Line2D.Float(140f, 150f, 160f, 150f);
      Line2D line8 = new Line2D.Float(160f, 150f, 160f, 200f);

      g2D.draw(line1);
      g2D.draw(line2);
      g2D.draw(line3);
      g2D.draw(line4);
      g2D.draw(line5);
      g2D.draw(line6);
      g2D.draw(line7);
      g2D.draw(line8);
    }
  }

  public static void main(String[] a) {
    JFrame f = new JFrame();
    f.getContentPane().add(new House());
    f.setDefaultCloseOperation(1);
    f.setSize(700, 550);
    f.setVisible(true);
  }
}

           
         
    
    
  

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