Paul:
Problem #1 is fixed in the soon to be released Java3d 1.2.1 Beta. Do you
have a test case for the other 2 bugs? You also mention that you filed a
bug - do you have the bug id?
Thanks
Uma
Java3D Team
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> Date: Fri, 6 Oct 2000 14:34:03 +0200
> From: "Dipl. Ing. Paul Szawlowski" <[EMAIL PROTECTED]>
> Subject: [JAVA3D] Bug(s) in class ModelClip ?
> To: [EMAIL PROTECTED]
>
> Hello Java 3D users !
>
> i've noticed (a) Bug(s) in class ModelClip (same behavior when using
> java3d 1.2 running on WIN NT and Linux).
>
> I have several objcts in my scene which can be made visible/invisible by
> detaching or adding the appropriate Branchgroup to the scenegraph. This
> worked fine.
> In the next step I introduced a clipping plane using an object of type
> ModelClip (only one of the six possible clipping planes is enabled;
> clipping planes parallel the xy, xz, yz planes through the origin - this
> is not the default !).
> I want to select which of my objects shall be clipped by the plane. This
> is done using the ModelClip.addScope( ) and ModelClip.removeScope( )
> methods. If the list of scopes is empty the subgraph including the
> ModelClip was detached or the clipping plane was disabled (I tried both
> variants).
>
> 1) However after I added one object to the scope I got the following
> exception when detaching the BranchGroup to make the object invisible
> (even when I removed it from the scope of the ModelClip class before) I
> got the following exception:
>
> Exception occurred during event dispatching:
> java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
> at java.util.ArrayList.RangeCheck(ArrayList.java:491)
> at java.util.ArrayList.remove(ArrayList.java:375)
> at javax.media.j3d.GroupRetained.clearLive(GroupRetained.java:1756)
> at javax.media.j3d.GroupRetained.checkClearLive(GroupRetained.java:1142)
>
> at javax.media.j3d.GroupRetained.checkClearLive(GroupRetained.java:1104)
>
> at javax.media.j3d.GroupRetained.doRemoveChild(GroupRetained.java:301)
> at
>
javax.media.j3d.BranchGroupRetained.do_detach(BranchGroupRetained.java:78)
>
> at
> javax.media.j3d.BranchGroupRetained.detach(BranchGroupRetained.java:65)
> at javax.media.j3d.BranchGroup.detach(BranchGroup.java:97)
>
> (only the relevant stacktrace, without the function calls in my source
> code, is printed)
>
> 2) I use 3 cameras. One can be rotated around the origin (looking always
> to the origin) using a MouseBehavior object. If all objects are clipped
> (i.e. all unclipped objects are invisible) then the clipping plane does
> rotate with the camera ( it's of course not situated in the subgraph of
> the camera, i.e. not influenced of the camera's TransformGroup). The
> views of the static cameras remain correct.
> Only if both unclipped and clipped objects are visible the plane does
> not rotate with the camera (as it should be).
>
> 3) Sometimes objects stay clipped when removed from the scope list or
> will not be clipped if added to the scope list of the ModelClip object.
> I could not find a pattern with that.
>
> PS:
> ad 1) and 2): Possible reason could be a synchronisation problem between
> 2 concurrent threads of Java3d (see c) and ad c) ) ?
>
> I tried the following: I have to checkboxes for each object: one to
> add/remove it to the scope list of class ModelClip and one to add/detach
> it from the scenegraph. Furthermore a dummy BranchGroup is added to the
> scope list of class ModelClip with no children, so that it is not empty
> (i.e. global clipping is prevented).
>
> a) Both checkboxs unchecked. Check the Visibility-Checkbox: object
> appears. Check the Clipping-Checkbox: nothing happens (should be
> clipped).
>
> b) Both checkboxs unchecked. Check Clipping-Checkbox. Check
> Visibility-Checkbox: object appears and is clipped.
>
> c) first b) Uncheck Clipping-Checkbox: Nothing happens (should not be
> clipped). Uncheck Visibility-Checkbox: object disappears. Check
> Visibility-Checkbox: object appears unclipped.
>
> d) Both checkboxes checked. Uncheck Visibility-Checkbox: exception see
> 1).
>
> e) 2 objects. All checkboxes unchecked. For one object first d). Check
> Visibility-Checkbox of second object: object appears but clipped (should
> not be clipped).
>
> ad c) I further noticed: if removing from scope list and detaching from
> scene graph follows immediately (i. e. immediate function calls without
> user interaction through checkboxes) then an exception see 1) occurrs.
>
> I've already added this to the bug database.
>
> But I found out only 2 days ago that this mailing list exists and hope
> to get an answer earlier.
> Thanks in advance !
>
>
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