Rotation and coordinate translation : Transform « 2D Graphics GUI « Java

Rotation and coordinate translation


import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;

import javax.swing.JFrame;
import javax.swing.JPanel;

public class Rotate extends JPanel {

  public void paint(Graphics g) {
    Graphics2D g2d = (Graphics2D) g;
    g2d.setColor(new Color(150, 150, 150));
    g2d.fillRect(20, 20, 80, 50);
    g2d.translate(180, -150);
    g2d.rotate(Math.PI / 4);
    g2d.fillRect(20, 20, 80, 50);

  public static void main(String[] args) {
    JFrame frame = new JFrame("Rotation");
    frame.add(new Rotate());
    frame.setSize(300, 200);


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