衝突円コード
46145 ワード
package zhang.start;
import javax.swing.*;
import java.awt.*;
//
public class AlgoFrame extends JFrame {
private final int canvasWidth;
private final int canvasHeight;
public AlgoFrame(String title) {
this(title, 1024, 768);
}
public AlgoFrame(String title, int canvasWidth, int canvasHeight) { //canvas
super(title);
this.canvasWidth = canvasWidth;
this.canvasHeight = canvasHeight;
AlgoCanvas canvas = new AlgoCanvas();
setContentPane(canvas); // canvas
pack(); // ,
setResizable(false); //
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // X
setVisible(true); //
}
public int getCanvasWidth() {
return canvasWidth;
}
public int getCanvasHeight() {
return canvasHeight;
}
private Circle[] circles;
//
public void render(Circle[] circles) {
this.circles = circles; //
this.repaint(); // JFrame
//AlgoCanvas paintComponent
}
// JFrame Content Pane
private class AlgoCanvas extends JPanel { //
//
public AlgoCanvas() {
super(true);
}
@Override
protected void paintComponent(Graphics g) { //
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g; //
// :
RenderingHints renderingHints = new RenderingHints(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g2d.addRenderingHints(renderingHints);
//
AlgoVisHelper.setStrokeWidth(g2d, 1);
AlgoVisHelper.setColor(g2d, Color.magenta);
for (Circle circle : circles) {
if (!circle.isFilled)
AlgoVisHelper.strokeCircle(g2d, circle.x, circle.y, circle.getR());
else
AlgoVisHelper.fillCircle(g2d, circle.x, circle.y, circle.getR());
}
//
// AlgoVisHelper.setStrokeWidth(g2d,5);
//
// AlgoVisHelper.setColor(g2d,Color.magenta);
// AlgoVisHelper.fillCircle(g2d,canvasWidth/2,canvasHeight/2,200); //
//
// AlgoVisHelper.setColor(g2d,Color.green);
// AlgoVisHelper.strokeCircle(g2d,canvasWidth/2,canvasHeight/2,200);
}
@Override
public Dimension getPreferredSize() {
return new Dimension(canvasWidth, canvasHeight); //
}
}
}
package zhang.start;
import java.awt.*;
import java.awt.geom.Ellipse2D;
public class AlgoVisHelper {
private AlgoVisHelper() {
} //
public static void setStrokeWidth(Graphics2D g2d,int w){
g2d.setStroke(new BasicStroke(w,BasicStroke.CAP_ROUND,BasicStroke.JOIN_ROUND)); // 、
}
public static void strokeCircle(Graphics2D g2d,int x,int y ,int r){
Ellipse2D circle = new Ellipse2D.Float(x-r,y-r,2*r,2*r);
g2d.draw(circle);
}
public static void fillCircle(Graphics2D g2d,int x,int y ,int r){
Ellipse2D circle = new Ellipse2D.Float(x-r,y-r,2*r,2*r);
g2d.fill(circle);
}
public static void setColor(Graphics2D g2d,Color color){
g2d.setColor(color);
}
public static void pause(int t){
try {
Thread.sleep(t);
} catch (InterruptedException e) {
System.out.println("Error is sleeping");
}
}
}
package zhang.start;
import java.awt.*;
import java.awt.event.*;
//
public class AlgoVisializer {
private final Circle[] circles;
private AlgoFrame frame ;
private boolean isAnimated = true ;
public AlgoVisializer(int sceneWidth,int sceneHeight , int N) {
//
circles = new Circle[N];
int R = 50; //
for (int i = 0; i < circles.length; i++) {
int x = (int) (Math.random() * (sceneWidth - 2 * R)) + R;
int y = (int) (Math.random() * (sceneHeight - 2 * R)) + R;
int vx = (int) (Math.random() * 11) - 5; // -5~5
int vy = (int) (Math.random() * 11) - 5; // -5~5
circles[i] = new Circle(x, y, R, vx, vy);
}
//
// Gui 、
EventQueue.invokeLater(
() -> {
frame = new AlgoFrame("Wlcome", sceneWidth, sceneHeight);
frame.addKeyListener(new AlgoKeyListener()); //
frame.addMouseListener(new AlgoMouseListener());
//The Event Dispatch Thred
// ,
// Tasks on the event dispatch thread must finish quickly
//
new Thread(
() -> {
run();
}
).start();
}
);
}
//
public void run(){
while (true) {
//
frame.render(circles);
AlgoVisHelper.pause(20); //
//
if (isAnimated){
for (Circle circle : circles) {
circle.move(0, 0, frame.getCanvasWidth(), frame.getCanvasHeight());
}
}
}
}
// implements KeyListener | extends KeyAdapter
private class AlgoKeyListener extends KeyAdapter {
@Override
public void keyReleased(KeyEvent e) {
if (e.getKeyChar() == ' '){ //
isAnimated = !isAnimated ;
}
}
}
//
private class AlgoMouseListener extends MouseAdapter{
@Override
public void mousePressed(MouseEvent e) {
e.translatePoint(0,-(frame.getBounds().height - frame.getCanvasHeight()) );
for(Circle circle : circles) {
if (circle.contain(e.getPoint()))
circle.isFilled = !circle.isFilled ;
}
}
}
public static void main(String[] args) {
int sceneWidth = 800;
int sceneHeight = 800;
int N = 10; //
AlgoVisializer algoVisializer = new AlgoVisializer(sceneWidth, sceneHeight, N);
}
}
package zhang.start;
import java.awt.*;
//
public class Circle {
public int x , y ;
public Boolean isFilled = false ;
private int r ;
private int vx , vy ;
public Circle(int x, int y, int r, int vx, int vy) {
this.x = x;
this.y = y;
this.r = r;
this.vx = vx;
this.vy = vy;
}
public int getR() {
return r;
}
public void move(int minx,int miny,int maxx,int maxy){
x += vx ;
y += vy ;
checkCollision(minx, miny, maxx, maxy);
}
private void checkCollision(int minx,int miny,int maxx,int maxy){
if (x - r < minx) {
x = r;
vx = -vx;
}
if (x + r >= maxx) {
x = maxx - r;
vx = -vx;
}
if (y - r < miny) {
y = r;
vy = -vy;
}
if (y + r >= maxy) {
y = maxy - r;
vy = -vy;
}
}
public boolean contain(Point point) {
return (x - point.x) * (x - point.x) + (y - point.y) * (y - point.y) <= r * r ;
}
}