JavaFX 2 Circle Path For Animation

package arcdemo;

import javafx.animation.PathTransition;

import javafx.animation.PathTransition.OrientationType;

import javafx.animation.PathTransitionBuilder;

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.ArcTo;

import javafx.scene.shape.ClosePath;

import javafx.scene.shape.MoveTo;

import javafx.scene.shape.Path;

import javafx.scene.shape.PathBuilder;

import javafx.scene.shape.Rectangle;

import javafx.stage.Stage;

import javafx.util.Duration;

/**

 *

 * @author Jay.Thakkar

 */

public class ArcDemo extends Application {

    private PathTransition pathTransitionEllipse;

    private PathTransition pathTransitionCircle;

    private void init(Stage primaryStage) {

        Group root = new Group();

        primaryStage.setResizable(false);

        primaryStage.setScene(new Scene(root, 600, 460));

        // Ellipse path example

        Rectangle rect = new Rectangle(0, 0, 40, 40);

        rect.setArcHeight(10);

        rect.setArcWidth(10);

        rect.setFill(Color.ORANGE);

        root.getChildren().add(rect);

        Path path = createEllipsePath(200, 200, 50, 100, 45);

        root.getChildren().add(path);

        pathTransitionEllipse = PathTransitionBuilder.create()

                .duration(Duration.seconds(4))

                .path(path)

                .node(rect)

                .orientation(OrientationType.ORTHOGONAL_TO_TANGENT)

                .cycleCount(Timeline.INDEFINITE)

                .autoReverse(false)

                .build();

        // Cirle path example

        Rectangle rect2 = new Rectangle(0, 0, 20, 20);

        rect2.setArcHeight(10);

        rect2.setArcWidth(10);

        rect2.setFill(Color.GREEN);

        root.getChildren().add(rect2);

        Path path2 = createEllipsePath(400, 200, 150, 150, 0);

        root.getChildren().add(path2);

        pathTransitionCircle = PathTransitionBuilder.create()

                .duration(Duration.seconds(2))

                .path(path2)

                .node(rect2)

                .orientation(OrientationType.ORTHOGONAL_TO_TANGENT)

                .cycleCount(Timeline.INDEFINITE)

                .autoReverse(false)

                .build();

    }

    private Path createEllipsePath(double centerX, double centerY, double radiusX, double radiusY, double rotate) {

        ArcTo arcTo = new ArcTo();

        arcTo.setX(centerX - radiusX + 1); // to simulate a full 360 degree celcius circle.

        arcTo.setY(centerY - radiusY);

        arcTo.setSweepFlag(false);

        arcTo.setLargeArcFlag(true);

        arcTo.setRadiusX(radiusX);

        arcTo.setRadiusY(radiusY);

        arcTo.setXAxisRotation(rotate);

        Path path = PathBuilder.create()

                .elements(

                new MoveTo(centerX - radiusX, centerY - radiusY),

                arcTo,

                new ClosePath()) // close 1 px gap.

                .build();

        path.setStroke(Color.DODGERBLUE);

        path.getStrokeDashArray().setAll(5d, 5d);

        return path;

    }

    @Override

    public void start(Stage primaryStage) throws Exception {

        init(primaryStage);

        primaryStage.show();

        pathTransitionEllipse.play();

        pathTransitionCircle.play();

    }

    public static void main(String[] args) {

        launch(args);

    }

}