Dear all:
i understand everything you saying, but how do i set the User Data ? at the
point of creating the cone ?
this is what i have:
SceneGraphPath []Path = branchGroup.pickAllSorted(pickRay);
if(Path!=null)
{
for (int b=0;b<Path.length;b++)
{
System.out.println("path[i]="+Path[b]);
Node node = Path[b].getObject();
Protein protein = (Protein) node.getUserData();
System.out.println("protein="+protein);
}
}
but it says the protein is null , does that mean that i did not set the user
data ? this is what the compiler prints out. why is printing protein=null
when infact it is not ?
path[i]=javax.media.j3d.Locale@1c7980c : com.sun.j3d.utils.geometry.Cone,
Protein@1568fb5 :
javax.media.j3d.Shape3Djavax.media.j3d.TriangleFanArray@1f4bcf7
protein=null
any Ideas ??
thanks,
Isaac
-----Original Message-----
From: greg baboolal
To: Brobbey,Isaac (neuron)
Sent: 2/6/03 4:00 AM
Subject: RE: [JAVA3D] scene graph object
Hi,
ID is an arbitrary Object where (i) is an argument in
it's constructor.
it is part of the demo examples for j3d:
C:\j2sdk1.4.0_02\demo\java3d\FourByFour\ID.java
By setting a reference to a corresponding Object in
the userData, for example, one could then do something
like this:
Protein protein = (Protein) node.getUserData();
Sys.out.print( protein.name );
(assuming that for example 'name' is a var in the
Protein Object class )
Got to go, but can discuss later.
Greg.
--- "Brobbey,Isaac (neuron)"
<[EMAIL PROTECTED]> wrote:
> Greg:
>
> thanks, for the insight.
> one little thing to know is, how does ID id = new
> ID(i); gets created ?
> where is the i coming from ? which package is the ID
> coming from?
>
> thanks once again
>
>
> Isaac
>
> -----Original Message-----
> From: greg baboolal
> To: [EMAIL PROTECTED]
> Sent: 2/5/03 10:08 PM
> Subject: Re: [JAVA3D] scene graph object
>
> Dear Isaac,
>
> It is not very clear how or why the TriangleFanArray
> is being displayed in the scene path.
>
> As a test I used the Four by Four example in the j3d
> example and changed the spheres to Cones, when
> printing out the scene path it shows:
>
> path[0]=javax.media.j3d.Locale@f297e7 :
> com.sun.j3d.utils.geometry.Cone, ID@d2fc36 :
> javax.media.j3d.Shape3D, ID@d2fc36
> LocalToVworld Transform:
> 1.0, 0.0, 0.0, 10.0
> 0.0, 1.0, 0.0, -10.0
> 0.0, 0.0, 1.0, 30.0
> 0.0, 0.0, 0.0, 1.0
>
> FOUND:javax.media.j3d.Shape3D@19e15c
> ID:ID@d2fc36
>
> which makes no reference to a 'tfa'?
>
> In the Positions file i set the Cones userData with
> it's corresponding ID object which is detected and
> is
> retrievable as demo'd in the above snippet.
>
> the code to do this was:
>
> ID id = new ID(i);
> posCone[i].setUserData(id);
>
> The retrieval would then be:
>
> ID posID = (ID) node.getUserData();
>
> This is irrespective of whether, for example, your
> Protein extends a Shape3D. I have found it easiest
> to
> retrieve a reference to an object that is associated
> with a geometrical j3d shape by setting a reference
> to
> that object in the shape3D's userData.
>
> Maybe someone can clarify this. As I too am in
> development of j3d experience I have been following
> your postings with interest ( there are similiar
> traits to the stuff I have been working with ) thats
> why it's nice to see solutions too!
>
> Anyway hope this helps.
>
> Greg.
>
>
>
>
>
>
>
>
>
> --- "Brobbey,Isaac (neuron)"
> <[EMAIL PROTECTED]> wrote:
> > Dear all:
> >
> > consider the snippet below:
> >
> > int x = ((MouseEvent)event[i]).getX();
> > int y =
> > ((MouseEvent)event[i]).getY();
> > System.out.println("x="+"
> > "+x);
> > PickRay pickRay =
> > generatePickRay(x,y);
> > SceneGraphPath []Path =
> > branchGroup.pickAll(pickRay);
> > for (int
> b=0;b<Path.length;b++)
> > {
> >
> > System.out.println("path[b]="+Path[b]);
> > }
> >
> > the following print below shows the result of the
> > path, i want to retrieve
> > the object Protein which i used to make the
> > cone.something like
> >
> > Protein tein =(Protein)Path[0].getObject();
> >
> > but that throws an exception, any ideas on how
> > really get to this object ?
> >
> > path[i]=javax.media.j3d.Locale@1fe571f :
> > com.sun.j3d.utils.geometry.Cone,
> > Protein@109ea96 :
> >
>
javax.media.j3d.Shape3Djavax.media.j3d.TriangleFanArray@83b1b
> >
> > LocalToVworld Transform:
> > 0.0375749076740305, -0.005965948985267853,
> > -0.012350453208999744,
> > 0.285124270664246 0.0, 0.03601788328904463,
> > -0.017398620975559716,
> > 0.12078290366391121 0.013715911991643523,
> > 0.01634378978561484,
> > 0.033834216736250124, 0.6479161499920172
> > 0.0, 0.0, 0.0, 1.0
> >
> >
> > this is what i really want to process
> >
> > path[i]=javax.media.j3d.Locale@1fe571f :
> > com.sun.j3d.utils.geometry.Cone,
> > Protein@109ea96 :
> >
>
javax.media.j3d.Shape3Djavax.media.j3d.TriangleFanArray@83b1b
> >
> > and get to the protein object.
> >
> > any Ideas ?
> >
> >
> > thanks,
> >
> > Isaac
> >
> >
>
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