JavaFX 动画 - 路径动画示例

import javafx.animation.PathTransition;
import javafx.animation.Timeline;
import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.scene.shape.CubicCurveTo;
import javafx.scene.shape.MoveTo;
import javafx.scene.shape.Path;
import javafx.stage.Stage;
import javafx.util.Duration;

public class Main extends Application {

  @Override
  public void start(final Stage stage) throws Exception {
    final Group group = new Group();
    final Scene scene = new Scene(group, 600, 400, Color.GHOSTWHITE);
    stage.setScene(scene);
    stage.setTitle("JavaFX 2 Animations");
    stage.show();
    final Circle circle = new Circle(20, 20, 15);
    circle.setFill(Color.DARKRED);

    final Path path = new Path();
    path.getElements().add(new MoveTo(20, 20));
    path.getElements().add(new CubicCurveTo(30, 10, 380, 120, 200, 120));
    path.getElements().add(new CubicCurveTo(200, 1120, 110, 240, 380, 240));
    path.setOpacity(0.5);

    group.getChildren().add(path);
    group.getChildren().add(circle);
    final PathTransition pathTransition = new PathTransition();

    pathTransition.setDuration(Duration.seconds(8.0));
    pathTransition.setDelay(Duration.seconds(.5));
    pathTransition.setPath(path);
    pathTransition.setNode(circle);
    pathTransition
        .setOrientation(PathTransition.OrientationType.ORTHOGONAL_TO_TANGENT);
    pathTransition.setCycleCount(Timeline.INDEFINITE);
    pathTransition.setAutoReverse(true);
    pathTransition.play();
  }

  public static void main(final String[] arguments) {
    Application.launch(arguments);
  }
}