【JAVA】重力模拟

骑猪看日落 2024-02-05 15:04 1阅读 0赞

import javax.swing.*;
    import java.awt.*;
    
    class Base
    {
        private int x;
        private int y;
        private int displayWidth;
        private int displayHeight;
        private final Image image;
    
        public Base(int x, int y, int displayWidth, int displayHeight, String fileName) {
            this.x = x;
            this.y = y;
            this.displayWidth = displayWidth;
            this.displayHeight = displayHeight;
            this.image = Toolkit.getDefaultToolkit().getImage( "resources\\images\\" + fileName);
        }
    
        Base(Image image) {
            this.image = image;
        }
    
        public int getX() {
            return x;
        }
    
        public void setX(int x) {
            this.x = x;
        }
    
        public int getY() {
            return y;
        }
    
        public void setY(int y) {
            this.y = y;
        }
    
        public int getDisplayWidth() {
            return displayWidth;
        }
    
        public void setDisplayWidth(int displayWidth) {
            this.displayWidth = displayWidth;
        }
    
        public int getDisplayHeight() {
            return displayHeight;
        }
    
        public void setDisplayHeight(int displayHeight) {
            this.displayHeight = displayHeight;
        }
    
        public Image getImage() {
            return image;
        }
    }
    
    class Bullet extends Base
    {
        public Bullet(int x, int y, int displayWidth, int displayHeight, String fileName)
        {
            super(x, y, displayWidth, displayHeight, fileName);
        }
    }
    
    
    public class GameFrame3 extends JFrame implements Runnable {
    
        private long timerClick;
        private final Graphics graphics; //画笔
        private final Bullet bullet;
        private  int t ;
        private int v0;
        private int vt;
        private int g;
    
        public GameFrame3() {
            //画板的宽度
            int windowWidth = 629;
            //画板的高度
            int windowHeight = 990;
            setLayout(null);
            setSize(windowWidth, windowHeight);
            setLocationRelativeTo(null);
            setVisible(true);
            timerClick = 0;
            v0 = 100;
            g = 10;
            graphics = getContentPane().getGraphics();
            bullet = new Bullet(0, 600, 64, 64, "bullet_01.png");
        }
    
        /**
         * 速度-时间公式：v=gt
         * 位移-时间公式; h=gt^2/2
         * 速度-位移公式：v^2=2gh
         */
        @Override
        public void run() {
            while (true)
            {
                timerClick++;
                graphics.drawImage(bullet.getImage(), bullet.getX(), bullet.getY(),bullet.getDisplayWidth(),bullet.getDisplayHeight(),this);
    
                if (timerClick % 100 == 0)
                {
                    t += 1;
                    vt = v0 - g * t;
                    int h = (int) (v0 * t -1 / 2.0 * g * t * t);
                    bullet.setX(t * 10);
                    bullet.setY(600 - h);
    
                    System.out.println(bullet.getX() + " " + bullet.getY());
                }
    
                try {
                    Thread.sleep(10);
                } catch (InterruptedException e) {
                    throw new RuntimeException(e);
                }
            }
        }
    
        public static void main(String[] args) {
            GameFrame3 gameFrame3 = new GameFrame3();
            Thread thread = new Thread(gameFrame3);
            thread.start();
        }
    }

运行效果：

![47f05bfab123403fa9ca2abe3d0b70ed.png][]

[47f05bfab123403fa9ca2abe3d0b70ed.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/05/a5bb7db58f9b45a88c26dfca3de28125.png