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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 _bara_kyokusen 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;
gc.beginPath();
for (int deg = 0; deg <= 1080; deg += 4) {
t = deg * Math.PI / 180;
r = 150 * Math.sin(t * 4 / 3);
x = r * Math.cos(t);
y = r * Math.sin(t);
if (deg == 0) gc.moveTo(x, y);
else gc.lineTo(x, y);
}
gc.stroke();
}
}