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package sample;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.canvas.Canvas;
import javafx.scene.canvas.GraphicsContext;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;
public class _rasen_en extends Application {
public static void main(String... args) {
Application.launch(args);
}
private static final int VIEW_W = 400, VIEW_H = 300;
private GraphicsContext gc;
@Override
public void start(Stage stage) throws Exception {
BorderPane pane = new BorderPane();
stage.setScene(new Scene(pane));
Canvas view = new Canvas(VIEW_W, VIEW_H);
gc = view.getGraphicsContext2D();
pane.setCenter(view);
draw();
stage.show();
}
private void draw() {
gc.setTransform(1, 0, 0, 1, VIEW_W / 2, VIEW_H / 2);
double x, y, r, t;
for (int deg = 100; deg < 2600; deg += 20) {
t = deg * Math.PI / 180;
r = 2 * Math.exp(0.1 * t);
x = r * Math.cos(t);
y = r * Math.sin(t);
r /= 5;
gc.strokeOval(x - r, y - r, 2 * r, 2 * r);
}
}
}