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  1. JDK
  2. JDK-8178805

PathTransition jitter

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    • generic

    Description

      FULL PRODUCT VERSION :
      JDK 8_64 u121

      ADDITIONAL OS VERSION INFORMATION :
      Microsoft Windows [Version 10.0.14393]

      EXTRA RELEVANT SYSTEM CONFIGURATION :
      cpu: 6th gen i7

      A DESCRIPTION OF THE PROBLEM :
      A long time ago I complained about jittery PathTransition animation.  A bug was openned and I was provided a workaround. This is the old bug: https://bugs.openjdk.java.net/browse/JDK-8126829  This was with Java 7.  I revisited the old project that lead to that initial complain, this time with Java 8.  The problem seems to be back.  I could not find the old bug report, since I think the JavaFX team is not using the same bug tracking site.

      Below is the test code to reproduce.  I tried it using JDK 8_64 u5, u11, u25, u112, u121 and the problem occurs with all of them.  The ImageView stutters through the PathTransition.  I have a new laptop with 6th gen I7 and plenty of ram.  I do not think it is the hardware.  This used to be smooth like butter.  Anyone else experiencing this or can make any suggestions?



      REGRESSION. Last worked in version 7u80

      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      @Override
          public void start(Stage primaryStage) {

              Circle circle = new Circle(40, Color.RED);
              Path path = new Path();
              path.getElements().add(new MoveTo(100, 100));
              path.getElements().add(new LineTo(500, 100));
              path.getElements().add(new LineTo(500, 500));
              path.getElements().add(new LineTo(100, 500));
              path.getElements().add(new LineTo(100, 100));

              PathTransition pathTransition = new PathTransition(Duration.seconds(6), path, circle);
              pathTransition.setCycleCount(Animation.INDEFINITE);
              pathTransition.setOrientation(PathTransition.OrientationType.ORTHOGONAL_TO_TANGENT);
              pathTransition.playFromStart();

              Group root = new Group();
              root.getChildren().add(circle);
              Scene scene = new Scene(root, 600, 600);
              primaryStage.setTitle("Hello World!");
              primaryStage.setScene(scene);
              primaryStage.show();
          }

      EXPECTED VERSUS ACTUAL BEHAVIOR :
      EXPECTED -
      Smooth animation.
      ACTUAL -
      Jitter

      REPRODUCIBILITY :
      This bug can be reproduced always.

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              Unassigned Unassigned
              webbuggrp Webbug Group
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                Created:
                Updated: