85 lines
2.4 KiB
Java
85 lines
2.4 KiB
Java
import java.awt.*;
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import static java.lang.Math.*;
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import javax.swing.*;
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public class ArchimedeanSpiral extends JPanel {
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public ArchimedeanSpiral() {
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setPreferredSize(new Dimension(640, 640));
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setBackground(Color.white);
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}
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void drawGrid(Graphics2D g) {
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g.setColor(new Color(0xEEEEEE));
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g.setStroke(new BasicStroke(2));
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double angle = toRadians(45);
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int w = getWidth();
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int center = w / 2;
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int margin = 10;
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int numRings = 8;
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int spacing = (w - 2 * margin) / (numRings * 2);
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for (int i = 0; i < numRings; i++) {
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int pos = margin + i * spacing;
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int size = w - (2 * margin + i * 2 * spacing);
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g.drawOval(pos, pos, size, size);
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double ia = i * angle;
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int x2 = center + (int) (cos(ia) * (w - 2 * margin) / 2);
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int y2 = center - (int) (sin(ia) * (w - 2 * margin) / 2);
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g.drawLine(center, center, x2, y2);
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}
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}
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void drawSpiral(Graphics2D g) {
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g.setStroke(new BasicStroke(2));
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g.setColor(Color.orange);
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double degrees = toRadians(0.1);
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double center = getWidth() / 2;
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double end = 360 * 2 * 10 * degrees;
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double a = 0;
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double b = 20;
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double c = 1;
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for (double theta = 0; theta < end; theta += degrees) {
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double r = a + b * pow(theta, 1 / c);
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double x = r * cos(theta);
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double y = r * sin(theta);
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plot(g, (int) (center + x), (int) (center - y));
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}
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}
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void plot(Graphics2D g, int x, int y) {
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g.drawOval(x, y, 1, 1);
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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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drawGrid(g);
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drawSpiral(g);
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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("Archimedean Spiral");
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f.setResizable(false);
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f.add(new ArchimedeanSpiral(), 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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