63 lines
1.7 KiB
Java
63 lines
1.7 KiB
Java
import java.awt.*;
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import java.awt.event.ActionEvent;
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import javax.swing.*;
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public class PolySpiral extends JPanel {
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double inc = 0;
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public PolySpiral() {
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setPreferredSize(new Dimension(640, 640));
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setBackground(Color.white);
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new Timer(40, (ActionEvent e) -> {
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inc = (inc + 0.05) % 360;
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repaint();
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}).start();
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}
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void drawSpiral(Graphics2D g, int len, double angleIncrement) {
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double x1 = getWidth() / 2;
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double y1 = getHeight() / 2;
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double angle = angleIncrement;
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for (int i = 0; i < 150; i++) {
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g.setColor(Color.getHSBColor(i / 150f, 1.0f, 1.0f));
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double x2 = x1 + Math.cos(angle) * len;
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double y2 = y1 - Math.sin(angle) * len;
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g.drawLine((int) x1, (int) y1, (int) x2, (int) y2);
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x1 = x2;
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y1 = y2;
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len += 3;
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angle = (angle + angleIncrement) % (Math.PI * 2);
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}
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}
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@Override
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public void paintComponent(Graphics gg) {
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super.paintComponent(gg);
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Graphics2D g = (Graphics2D) gg;
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g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
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RenderingHints.VALUE_ANTIALIAS_ON);
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drawSpiral(g, 5, Math.toRadians(inc));
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}
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public static void main(String[] args) {
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SwingUtilities.invokeLater(() -> {
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JFrame f = new JFrame();
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f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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f.setTitle("PolySpiral");
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f.setResizable(true);
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f.add(new PolySpiral(), BorderLayout.CENTER);
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f.pack();
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f.setLocationRelativeTo(null);
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f.setVisible(true);
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});
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}
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}
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