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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 _rotate_line extends Application {
public static void main(String... args) {
Application.launch(args);
}
private static final int VIEW_W = 400, VIEW_H = 300;
@Override
public void start(Stage stage) throws Exception {
BorderPane pane = new BorderPane();
Scene scene = new Scene(pane);
stage.setScene(scene);
Canvas view = new Canvas(VIEW_W, VIEW_H);
pane.setCenter(view);
draw(view.getGraphicsContext2D());
stage.show();
}
private void draw(GraphicsContext gc) {
gc.setTransform(1, 0, 0, 1, VIEW_W / 2, VIEW_H / 2);
double x1, y1, x2, y2;
double t;
for (int deg = 0; deg < 360; deg += 5) {
t = deg * Math.PI / 180;
x1 = 150 * Math.cos(t);
y1 = 150 * Math.sin(t);
t = (deg + 120) * Math.PI / 180;
x2 = 150 * Math.cos(t);
y2 = 150 * Math.sin(t);
gc.beginPath();
gc.moveTo(x1, y1);
gc.lineTo(x2, y2);
gc.stroke();
}
}
}