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Hello java3D people.
I have been discovering this java3D mature API.
I like it.
Nevertheless I have been strugling for over a week (shame on me) to
add in front of my 'Camera' of little shape/avatar that will pretent to be the guy walking along
the 3D Scene.
I Tried a few thing (thanks Rolf for the code) but it seems I can't never see my shape/avatar
I have the Semlman book but I can't sem to find a good and simple example
with the 'avatar' issue.
Has someone a code example to help me ?
thanks
Thierry, Paris, France
-------Original Message-------
Hi Thierry,
to 1.) thats what I meant...imagine any shooter, independent of the
direction you see the cross-hairs (graticule...)
...that cross hair is (could be) a shape3d which is added to
the ViewBranchGraph...->2.)
2.) eg a built (and the adding of the shape3D) of a viewBranch is in
that Method:
private BranchGroup buildViewBranch(Canvas3D can3D, float backClip){
BranchGroup viewBG=new BranchGroup();
Transform3D setStartPos=new Transform3D();
setStartPos.set(new Vector3d(0.0,0.0,0.0));
viewTG=new TransformGroup(setStartPos);
viewTG.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
viewTG.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
ViewPlatform vpf=new ViewPlatform();
viewTG.addChild(vpf);
viewBG.addChild(viewTG);
View view=new View();
PhysicalBody pBody=new PhysicalBody();
PhysicalEnvironment umgebung=new PhysicalEnvironment();
view.setPhysicalBody(pBody);
view.setPhysicalEnvironment(umgebung);
view.addCanvas3D(can3D);
view.setBackClipDistance(backClip);
view.attachViewPlatform(vpf);
return viewBG;
}
//[in the most j3d examples the building of the viewBranchGraph is done
by using of SimpleUniverse, but this is a bit too limited...]
in the initializing Method is written:
virtUniverse=new VirtualUniverse();
locale=new Locale(virtUniverse);
viewPosition=new BranchGroup();
viewPosition=buildViewBranch(c,viewRange);
viewTG.addChild(CROSSHAIR_SHAPE3D);
viewPosition.compile();
locale.addBranchGraph(viewPosition);
this could explain what I meant....
if you talking about "Buch" you maybe mean a german-tongued book...
the onliest I know is CliXX a good one for starting up with j3d
in english tongue there loads more! For starting I would adwise the
sun tutorial which absolutley exact explain how to use j3d..starting with
nice and tiny examples.....and also explaining exactly what a
ViewBranchGraph is
so in the hope I had helped you,
best regards
rolf
PS I am absolutley a non proffesional j3d user !!! just a hobby...so
there're could
be some better explanations, solutions than mine....
Thierry Milard (free) wrote:
> Rolf,
> I am relativeny new to java3D (2 months) [and the 3D].
> I find this API very nice and ... surprisingly quite mature.
>
> I am _also_ looking for a way to *detect* some specific *shapes*
> are in the *camera* "view Frustrum"(I think this is the name....).
> I am interested in your solution.
>
> Please could you be more "beginer understandable".
> When you say you are" adding the containing Branchgroup to the view
> BranchGraph":
> 1) By the word "Branchgroup"do you mean the BG witch contains the shapes
> you want to detects ?
> 2) What exactly do you mean by 'adding *to* the *ViewBranchGraph*' ?
> This code is what you meant ?
> theviewBranchGraph.addChild(theBranchGrouptodetect ); ??
> Thanks Rolf for your time.
> By the way if you know of a buch of code please don't hesitate to give
> the url.
> Thierry
> /-------Original Message-------/
>
> /*From:*/ Discussion list for Java 3D API
> /*Date:*/ mercredi 10 mars 2004 20:33:12
> /*Subject:*/ Re: [JAVA3D] can you tell if an object is in the current
> view?
>
> Hi Kevin,
> I'd managed this in adding the containing Branchgroup to the view
> BranchGraph, so everey transform, which change the vieplatform is also
> made for the "Corne-Object" I did it for an arrow to show the direction
> to the desired target.
> best regards
> rolf
>
> Kevin wrote:
>
> >All,
> >
> >Is there a way to find out if an object is in the current View or not?
> >I have an object that I would like to stay on the edge of the screen no
> >matter how I resize the window or move the viewpoint. Is there a better
> >or different way to do what I am wanting to do?
> >
> >Any help would be much appreciated.
> >
> >kddubb
> >
> >===========================================================================
> >of the message "signoff JAVA3D-INTEREST". For general help, send email to
> include in the body of the message "help".
> >
> >
> >
>
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>
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--
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c/o
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