Hey Thomas,
Thanks for the info. I'd already seen "SimpleUniverse vs
VirtualUniverse" and the link you said but I was still a bit confused.
So, does it mean that to have a Ortho Projection I'll have to be in
Compatible Mode or is there any alternative to "setLeftProjection" ?
I'll like to do everything without the Compatible mode as this is the
better way to keep thing working in most places, I suppose!
If it isn't possible in my case, this means that I'll have to create my
own pickshape, right ? Do you know any place where I can learn to do
this in ortho, if needed ?
Once again, thanks :D
Take care,
Tiago Cardoso
Thomas Partsch wrote:
> Hi Tiago!
>
> I know that problem. It is discussed before in that newsgroup under the
> title "SimpleUniverse vs VirtualUniverse". I had the same idea as you
> had, that it would be a problem with the universe. But it isn't.
>
> The problem is that you activated the View's compatibility mode. That is
> to apply camera based options to the View model as you did (
> setLeftProjection(t3d) ). But this is not the original intention of the
> Java 3D View Model. The Java 3D View Model works different (see
> PhysicalBody and PhysicalEnvironment).
>
> Fact is, that the PickBehaviors don't work in compatibility mode. I just
> wrote a dissertation about an application using that compatibility mode
> (and the camera based model) and I used a frustum. I found no way to
> make the pickbehaviors work. So I implemented a key control.
>
> You'll find further information at
>
download.java.net/media/java3d/javadoc/1.4.0-latest/javax/media/j3d/doc-files/ViewModel.html
> I would recommend read that do***ent. It can probably explain the things
> better than I can at the moment ;)
>
> hth
> Thomas Partsch
>
> tiago.cardoso schrieb:
> > Hello,
> >
> > I made a simple app with a simpleUniverse. After testing it and using
> > picking (worked fine).
> >
> > I decided to implement the real app. The real app has to be in Ortho
> > projection and have tranformations on the viewbranch.
> >
> > So, I implemented the a class extending virtualuniverse. I did
> > everything "by the book" I think and everything worked fine as for the
> > visual aspect, object showed up in the right place and the view was
> > right.
> >
> > Now, I'm trying to use pickcanvas but it doesn't work at all :(
> > I've search a lot on the web and I already saw that there some kind of
> > problem with the pickcanvas pickshape for the customized
> > virtualuniverse.
> > In fact, the PickShape orign point, direction and start point don't
> > seem to make any sense at all.
> > (my objects have about 100 of size and the camera is ver faraway, and
> > the pickshape point is about (-0.07767107179733918,
> > -0.2967893129673346, 0.4174332443807395) although it changes - though
I
> > don't understand how and why)
> >
> > My universe has only a Locale. A world branch where I have my objects
> > and a view branch with my viewplataform and where I apply my
> > tranformgroup to change the camera point of view.
> > I use...
> >
> > projection2.ortho(0, _width, 0, _height, -BACK_CLIP_DISTANCE,
> > BACK_CLIP_DISTANCE);
> >
> > Transform3D cameratransf= new Transform3D();
> > this.getTransformGroup().getTransform(cameratransf);
> > projection2.mul(cameratransf);
> > view.setLeftProjection(projection2);
> >
> > ... to have a ortho projection.
> >
> > Any tips.. plz ?? :D
> >
> > Thanks!
> >
> > Tiago Cardoso
> >
|
