RotateTransition ImageView Error

Question

hi i have a problem with the Rotation in JavaFX i have install JavaFX 2.0.1. When i try the following Code example i only see the half picture but i dont know why. Without the Rotate i see the complete picture(its a "png" Image). When i Rotate the picture on the Z.AXIS the picture is also complete but on X.AXIS and Y.AXIS i have the Problem with the picture
ImageView  imagePos = (ImageView) levelItems.getChildren().get(0);
RotateTransition rotateTransition = new RotateTransition(Duration.seconds(2), imagePos);
rotateTransition.setAxis(Rotate.Y_AXIS);
rotateTransition.setFromAngle(0);
rotateTransition.setToAngle(360);
rotateTransition.setCycleCount(Timeline.INDEFINITE);
rotateTransition.play();     

Answer 1

The standard parallel camera is unkind to animations on the rotations around the y axis.
For the parallel camera, the user's eye is at z axis point 0, so any -ve z axis values will be clipped. When you rotate your image, half of it immediately goes negative and is clipped. You can somewhat get around this by setting translateZ for the node to a positive value. But, if you set translateZ too large or the node is a big node, when you do the rotation your node will still get clipped because the parallel camera does not support an infinite z clip distance, and in fact the z clip distance is really short (only a couple of hundred units). This latter issue perhaps may be bug, I'm not really sure, it certainly seems really annoying.
Place a perspective camera on the scene and you will get better results (as long as your Platform supports the ConditionalFeature.SCENE3D). The perspective camera places the viewer at a -ve co-ordinate on the z axis rather than at a zero co-ordinate and the range of z values accepted by it is far greater.
See this thread for further info: Re: How far is the eye from the z=0 plane,when using the PerspectiveCamera?
Or compile and play with the following program to get a better feel for it: http://jewelsea.wordpress.com/2011/11/16/rotation-transform-example/
Edited by: jsmith on Dec 2, 2011 4:23 PM
Fixed link to relevant thread.