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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