Commit e46a9c3f authored by Keiko Katsuragawa's avatar Keiko Katsuragawa

add 2-7-Graphics

parent 0271a291
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class SimpleDraw {
public static void main(String[] args) {
JFrame f = new JFrame("SimpleDraw");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setSize(300, 300);
f.setContentPane(new Canvas());
f.setVisible(true);
}
}
// JComponent is a base class for custom components
class Canvas extends JComponent {
Point M = new Point(); // mouse point
Point C = new Point(150, 150); // click point
Canvas(){
super();
this.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e){
C.x = e.getX();
C.y = e.getY();
repaint();
}
});
this.addMouseMotionListener(new MouseAdapter(){
public void mouseMoved(MouseEvent e){
M.x = e.getX();
M.y = e.getY();
repaint();
}
});
}
// custom graphics drawing
public void paintComponent(Graphics g) {
super.paintComponent(g);
// cast to get 2D drawing methods
Graphics2D g2 = (Graphics2D) g;
g2.setColor(Color.BLACK);
g2.setStroke(new BasicStroke(2));
g2.drawLine(C.x, C.y, M.x, M.y);
g2.fillOval(M.x - 5, M.y - 5, 10, 10);
g2.setColor(Color.RED);
g2.fillOval(C.x - 5, C.y - 5, 10, 10);
g2.drawString(String.format("%d,%d", C.x, C.y), C.x + 10, C.y + 10);
g2.setColor(Color.BLACK);
g2.drawString(String.format("%d,%d", M.x, M.y), M.x + 10, M.y + 10);
}
}
/*
* CS 349 Java Code Examples
*
* Transform1 Shows how to "manually" transform a shape model. NOTE: in practice,
you don't want do this. Use Graphics2D matrix tranformations instead.
*
*/
import javax.swing.JFrame;
import javax.swing.JComponent;
import javax.swing.JButton;
import java.awt.*;
import java.awt.geom.*;
import java.util.ArrayList;
import javax.vecmath.*;
import java.lang.Math.*;
import java.util.Random;
import java.awt.event.*;
// create the window and run the demo
public class Transform1 {
public static void main(String[] args) {
// create the window
Canvas canvas = new Canvas();
JFrame f = new JFrame("Transform1"); // jframe is the app window
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setSize(400, 400); // window size
f.setContentPane(canvas); // add canvas to jframe
f.setVisible(true); // show the window
}
}
class Canvas extends JComponent {
// the house shape model (position is centred at top left corner)
private Polygon shape =
new Polygon(new int[] { -50, 50, 50, 0, -50},
new int[] { 75, 75, -25, -75, -25}, 5);
Point2d M = new Point2d();
Canvas() {
// events
this.addMouseMotionListener(new MouseAdapter(){
public void mouseMoved(MouseEvent e){
M.x = e.getX();
M.y = e.getY();
repaint();
}});
}
// custom graphics drawing
public void paintComponent(Graphics g) {
super.paintComponent(g); // JPanel paint
Graphics2D g2 = (Graphics2D)g;
// the shape will get transformed into "world" coordinates
// transform by hand
// get copy of shape
Polygon transShape =
new Polygon(shape.xpoints, shape.ypoints, shape.npoints);
rotate(transShape, 45);
scale(transShape, 2, 1);
translate(transShape, M.x, M.y);
g2.setStroke(new BasicStroke(3));
g2.drawPolygon(transShape.xpoints, transShape.ypoints, transShape.npoints);
}
// non-matrix translate
void translate(Polygon s, double tx, double ty) {
for (int i = 0; i < s.npoints; i++) {
s.xpoints[i] += tx;
s.ypoints[i] += ty;
}
}
// non-matrix scale
void scale(Polygon s, double sx, double sy) {
for (int i = 0; i < s.npoints; i++) {
s.xpoints[i] *= sx;
s.ypoints[i] *= sy;
}
}
// no-matrix rotate
void rotate(Polygon s, double theta) {
double rad = Math.toRadians(theta);
for (int i = 0; i < s.npoints; i++) {
int x = s.xpoints[i];
int y = s.ypoints[i];
s.xpoints[i] = (int)((double)x * Math.cos(rad) - y * Math.sin(rad));
s.ypoints[i] = (int)((double)x * Math.sin(rad) + y * Math.cos(rad));
}
}
}
# super simple makefile
# call it using 'make NAME=name_of_code_file_without_extension'
# (assumes a .java extension)
NAME = SimpleDraw
# you may need to pass OS=win to run on windows
OS =
# HACK: vecmath is included regardless if needed
all:
@echo "Compiling..."
javac -cp vecmath.jar $(NAME).java
run: all
# windows needs a semicolon
ifeq ($(OS),win)
@echo "Running on windows ..."
java -cp "vecmath.jar;." $(NAME)
# everyone else likes a colon
else
@echo "Running ..."
java -cp "vecmath.jar:." $(NAME)
endif
clean:
rm -rf *.class
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