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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 _fill_rect 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);
_turtle turtle = new _turtle(gc);
gc.beginPath();
double len = 300, a = Math.atan(1 / Math.sqrt(2));
double cosa = Math.cos(a), sina = Math.sin(a);
turtle.position(-len * sina, len * cosa / 2);
turtle.angle(-90);
a *= 180 / Math.PI;
while (len > 5) {
turtle.turn(a); turtle.line(len);
turtle.turn(180 - a); turtle.line(len * cosa);
turtle.turn(90); turtle.line(len * sina);
turtle.turn(90); turtle.line(len * cosa);
turtle.turn(90); turtle.line(len * sina);
len /= Math.sqrt(2);
}
gc.stroke();
}
}