Thank you very much for answering me. I have downloaded Jbuilder Foundation 3.5
for Windows and for Linux, now I have to learn how to use it but it seems not to
be very hard and also i have already used C++ Builder and its very similar....
Just a simple question: To insert a Canvas 3D in JBuilder... I have to do it by
hand or I can add it like a Bean or something like that... sorry but i just
beginning and maybe my question is stupid...
Fabio Roberto de Miranda wrote:
> Based on your main requirement (portability) I'd suggest you to use
> JBuilder Foundation. It is free (www.inprise.com/jbuilder) and, as far as
> I know, is the most portable of the full-featured Java IDEs (Windows,
> Solaris and Linux). There's no JBuilder for the SGI, you could develop in
> any one of the first mentioned platforms and test it at the SGI throught
> the standard JDK.
> If you really need to develop (and not only deploy) for all the
> forementioned platforms, I guess the only solution I know is using Emacs
> plus and add-in module called JDE (you can find the link at
> www.blackdown.org). Although nice, Emacs+JDE are FAR more limited than
> JBuilder, or VisualAge, or others (for example, there's no GUI Builder).
> Regarding the second question (changing the axis of rotation), one
> suggestion I might give you is: instead of applying the rotation directly
> to the object you want not rotated around its center, try to create an
> auxiliary TransformGroup above the object's TransformGroup, and rotate the
> auxiliaty TransformGroup. At the object's true TransformGroup you apply
> the displacement you want for the center.
> In ASCII diagrams:
>
> What you had:
>
> TransformGroup myObjTG
> |
> |
> ----Shape3D
>
> My suggestion:
>
> TransformGroup auxiliaryTG
> |
> |
> ----TransformGroup myObjTG
> |
> |
> ----Shape3D
>
> Apply the rot/trans at the auxliary TG.
>
> Maybe this way it gets easier to see:
>
> Suppose this is a Shape3D and it has a TransformGroup right above it. If
> you apply a rotation at the TransformGroup, this Shape will be rotated
> around the "O" point.
>
> __________
> | |
> | |
> | + | +
> | O | X
> |_________|
>
> But, instead of rotating around that axis that contains the "O" point what
> you really wanted was rotating it around the "X" point, how would you do
> that?
> My suggestion is just add a TranformGroup above the TransformGroup you
> already have, and apply at your current TransformGroup a translation that
> equals (O-X) vector. This way, when applying translations at the auxiliary
> TransformGroup, your object will be rotated around that "X" point.
>
> Hope this helps
> Fabio de Miranda
>
> On Thu, 9 Mar 2000, luigi wrote:
>
> > Hello, I'm begining in the world of Java 3D and a i have a few
> > questions:
> > I'm going to develop an application to simulate a robot so i will need
> > Java 3D in order to represent it, and I will also need AWT/Swing
> > components for the interface. I'm writting here to ask what tool can I
> > use to do this work. I tried Visual Age (IBM) and JBuilder (Borland) but
> > i'm not sure if these are the best. I will need portability because i
> > will need to work with Windows, Linux and SGI...
> > Another question is if there is a way in Java 3D to change the axis of
> > rotation of an objet or i have to make a translation then the rotation
> > and then the inverse translation every time i want to rotate the
> > object...
> > Sorry if my questions are too basic, but i'm beginning in this...
> >
> > Thank you.
> >
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>
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