So, this means no Java3D 1.2 release?
regards,
On Sun, 14 May 2000, Jim Schatzman wrote:
> We have observed some real show-stopper problems with all versions of J3D 1.2
> to the point where we find it unusable. Specific problems with Beta 2 include:
>
> 1. Performance. Although in some cases static compiled scenes give higher
> frame rates (about 2x) vs J3D 1.1.3, dynamically changing scenes (primarily
> making heavy use of point arrays) run about TEN TO TWENTY TIMES SLOWER
> than J3D 1.1.3.
>
> 2. Lightweight popups. J3D 1.2 Beta 2 does not fix the lightweight popup
> problem
> where Swing popups are hidden by a Canvas 3D. Furthermore, with SOME
> video drivers, turning the lightweight popup off results in MASSIVE FLICKERING
> which makes the final product nearly unusable. For example, we see severe
> flickering with NT4.0/Creative Annihilator Pro (GeForce256) but none with
> NT4.0/Diamond Fire GL 1 - all with JDK 1.3. Flickering also occurs in J3D 1.1.3
> but is much less severe. Letting the lightweight popup default kills the
> flickering
> but results in invisible popups.
>
> 3. When a Shape3D is removed from a live tree in J3D 1.1.3 and earlier it can
> then be modified. In all versions of J3D 1.2, Java throws an exception claiming
> that the Shape3D is still live. A go-around is to place the Shape3D in a
> BranchGroup
> before adding it to the tree, and then removing the BranchGroup from the tree.
> This appears to work, but why is it necessary? It is hard to tell what is
> causing
> the performance problem (above) but this may be part of it.
>
> 4. Behaviors use SUBSTANTIAL CPU TIME when they should be idle. For example,
> when a RotationInterpolator is added to a live tree CPU usage goes to
> nearly 100%
> on a very fast Wintel machine even though the RotationInterpolator is disabled,
> and therefore should not be doing anything. Under J3D 1.1.3 and earlier,
> CPU is 0%
> under this circumstance.
>
> ANY IDEAS, WORK AROUNDS, PATCHES?????
>
> Thank you!!
>
> Jim Schatzman
>
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