JAVA - Ease Movement Object

 

package animatedobjectpanel;

import javax.swing.*;

import java.awt.*;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

public class AnimatedObjectPanel extends JPanel implements ActionListener {

    private int objectX = 50;

    private int objectY = 50;

    private int targetX = 300;

    private int animationDuration = 1000; // milliseconds

    private long startTime;

    private Timer timer;

    public AnimatedObjectPanel() {

        timer = new Timer(15, this); // 15ms delay for ~60fps

        timer.start();

        startTime = System.currentTimeMillis();

    }

    @Override

    protected void paintComponent(Graphics g) {

        super.paintComponent(g);

        Graphics2D g2d = (Graphics2D) g;

        g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

        g2d.setColor(Color.BLUE);

        g2d.fillRect(objectX, objectY, 50, 50); // Draw the animated object

    }

    @Override

    public void actionPerformed(ActionEvent e) {

        long currentTime = System.currentTimeMillis();

        long elapsedTime = currentTime - startTime;

        if (elapsedTime < animationDuration) {

            double progress = (double) elapsedTime / animationDuration;

            // Apply an easing function (e.g., ease-out quadratic)

            double easedProgress = 1 - Math.pow(1 - progress, 2); 

            objectX = (int) (50 + (targetX - 50) * easedProgress);

        } else {

            objectX = targetX; // Ensure it reaches the final position

            timer.stop(); // Stop the timer when animation is complete

        }

        repaint(); // Request a redraw

    }

    public static void main(String[] args) {

        JFrame frame = new JFrame("2D Animation with Easing");

        AnimatedObjectPanel panel = new AnimatedObjectPanel();

        frame.add(panel);

        frame.setSize(400, 300);

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.setVisible(true);

    }

}