FULL PRODUCT VERSION :


A DESCRIPTION OF THE PROBLEM :
I'm working on a small game in JavaFX where I move polygons using a PathTransition. I encountered an issue that I just could not find a fix for: when moving the polygons they sometimes leave a trace of artifacts behind.

It does not always occur and seems to be related to the Duration of the animation (see source code)



STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Use source code and as text.fxml the following:

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.layout.AnchorPane?>

<AnchorPane xmlns:fx="http://javafx.com/fxml/1">
</AnchorPane>


REPRODUCIBILITY :
This bug can be reproduced often.

---------- BEGIN SOURCE ----------
import java.io.IOException;
import javafx.animation.Interpolator;
import javafx.animation.TranslateTransition;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.scene.layout.Pane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Polygon;
import javafx.stage.Stage;
import javafx.util.Duration;

public class Main extends Application{

private Scene testScene;
private FXMLLoader testLoader;
private Pane testPane;
private Polygon polygon;

@Override
public void start(Stage primaryStage) throws Exception {
    testLoader = new FXMLLoader(getClass().getResource("test.fxml"));
    try {
        testPane = (Pane) testLoader.load();
    } catch (IOException e) {
        e.printStackTrace();
    }
    testScene = new Scene(testPane, 500, 500);
    primaryStage.setScene(testScene);

    polygon = new Polygon();
    polygon.setFill(Color.DARKSLATEBLUE);
    polygon.getPoints().setAll(new Double[]{ 50.0, 50.0, 70.0, 50.0, 70.0, 70.0, 50.0, 70.0 });

    TranslateTransition transition = new TranslateTransition();
    transition.setCycleCount(1);
    transition.setDuration(Duration.seconds(3));
    transition.setNode(polygon);
    transition.setFromX(0);
    transition.setToX(0);
    transition.setFromY(0);
    transition.setToY(400);
    transition.play();

    testPane.getChildren().add(polygon);

    primaryStage.show();
}

public static void main(String[] args) {
    launch(args);
 }

}
---------- END SOURCE ----------