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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 _billiard 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();
Scene scene = new Scene(pane);
stage.setScene(scene);
Canvas view = new Canvas(VIEW_W, VIEW_H);
pane.setCenter(view);
gc = view.getGraphicsContext2D();
draw();
stage.show();
}
private static final double BALL_R = 35, STEP_X = 70, STEP_Y = 60;
private void draw() {
gc.setTransform(1, 0, 0, -1, VIEW_W / 2, VIEW_H / 2);
// 10個のボールを描く
double y = (STEP_X - STEP_Y) / 2;
for (int n = 1; n <= 4; n++) {
for (int i = 0; i < n; i++)
gc.strokeOval((i - n / 2.0) * STEP_X,
(2 - n) * STEP_Y - y,
STEP_X, STEP_X);
}
// ボールを収める3角形のラックを描く
for (double r = BALL_R + 5; r <= (BALL_R + 15); r += 10) {
gc.beginPath();
gc.arc(0, 1.5 * STEP_Y, r, r, -30, -120);
gc.arc(-1.5 * STEP_X, -1.5 * STEP_Y, r, r, -150, -120);
gc.arc(1.5 * STEP_X, -1.5 * STEP_Y, r, r, -270, -120);
gc.closePath();
gc.stroke();
}
}
}