I would also like to mention that I feel that Java3D encourages a more holistic approach to performance optimisation in the context of the rest of the software development process.
I say this because I believe that Java3D and its relevant APIs allow cleaner working code to be written, such that the normal software development process can continue as scheduled. Then the system can be analyzed for performance bottlenecks, and they can be cleanly fixed or improved. By contrast, typical OpenGL code, and probably GL4Java code probably suffers from the fact that it is written in a less than highly structured c'ish way. (no effense to c coders, seriously). Perhaps this is simply an argument for more structured 3d software, but it is still relevant. Sincerely, Ian On Wed, 26 Feb 2003, Florin Herinean wrote: > Moving to GL4Java because of memory issues will not solve anything. I > thought also some time before that j3d is a huge memory hog, with models > needing for up to 250mb of memory, but after I saw that for the same models, > a bare-bones native (opengl/c) viewer was using the same amount of memory > made me change my mind. > > Bottom line: it's all about how you structure your scene! You can always eat > the memory if you know how ;) > > Cheers, > > Florin > > -----Ursprüngliche Nachricht----- > Von: Nitin.Jain [mailto:[EMAIL PROTECTED] > Gesendet: Mittwoch, 26. Februar 2003 10:28 > An: [EMAIL PROTECTED] > Betreff: Re: [JAVA3D] Java 3D or GL4Java > > > Aren't you mentioning more benefits of GL4Java than Java3D..."optimazation", > "GL Extension..", etc. So except for the support aspect is there any other > negative point of GL4Java. > > One thing is true that it is like reinventing the wheel if somebody uses > GL4Java and build his own OO scenegraph. But then, there is no choice, as > Java3D doesn't provide any interfaces to enable one to customize/optimize it > to his needs. > > After being LOYAL to java3D for past one and a half years, I'm now planning > to shift to GL4Java because of serious memeory and performance issues. > > nitin > > -----Original Message----- > From: Kevin Glass [mailto:[EMAIL PROTECTED] > Sent: Wednesday, February 26, 2003 2:44 PM > To: [EMAIL PROTECTED] > Subject: Re: [JAVA3D] Java 3D or GL4Java > > > With respect, I don't think its quite that simple. > > The Java3D vs GL4Java discussion is much like any other argument in > computing, pros and cons. > > Ease of use: > > Java 3D is, for most people, easier to use, although you have to deal > with an interpretation of 3d programming (SUN's) which may not be as > tried and tested as GL. However, for simple tasks, you may find that > GL4Java is easier simply because you don't have the infrastructure stuff > to set up before getting going (e.g. Universe, View). There are also far > more tutorials based around pure OpenGL than Java 3D, which is a shame. > Maybe some of the more vocal people on this list could spare some time > to put some together. > > Performance: > > GL4Java allows much lower level access and hence you can make > optimisations that you can't in Java 3D. I suppose this is like most OO > APIs, you have to generalise solutions to make things more "rounded". > This means that often you get a more general solution to something that > could have been quite exact. However, as things get more and more > complicated Java 3D comes into its own. Most GL projects end up having > some form of scene graph. If you implement your own in GL4Java you'll > probably find its less efficient and harder to use than the one provided > in Java 3D. So, again, I suppose it depends on the complexity of your > project. > > Hardware compatability: > > There are two aspects here. Firstly, both Java 3D and GL4Java support > OpenGL so they should both be happily compatiable with the hardware > avaiable at the moment (platforms and cards). However, the extensions to > GL (the cool features that you see in games) will appear in Java 3D much > more slowly than in GL4Java. GL4Java simply follows the GL spec. Java 3D > has to find an abstract way of supporting the new features without > breaking their current "model". I don't envy the developers this task :) > > Sorry for the long winded email but I hear this discussion all the time > and I think its one really worth considering properly. > > For my opinion, Java 3D is great, and performance is good for more > complicated projects. It also has the added benefit of good development > support and big (getting bigger) community of users. GL4Java, as useful > as it may be, is a step in the wrong direction. > > Kev > > Kevin J. Duling wrote: > > >Answers below.... > > > >----- Original Message ----- > >From: "Hong Cao" <[EMAIL PROTECTED]> > >To: <[EMAIL PROTECTED]> > >Sent: Tuesday, February 25, 2003 2:15 PM > >Subject: [JAVA3D] Java 3D or GL4Java > > > > > > > > > >>Hi, All, > >> > >>Anyone ever used both Java3D and GL4Java from > >>http://www.jausoft.com/gl4java/. Which one is better in performance? > >> > >> > > > >Java3D > > > > > > > >>Which one is easy to write code? > >> > >> > > > >Java3D > > > > > > > >>Which one is better in hardware compatibility? > >> > >> > > > >Java3D > > > >Now, did you really expect a different answer from people on a Java3D list? > >I could probably find websites to back up my statements, but it's not worth > >the time. You've got access to Google just as I do. > > > > > > > >>Thanks. > >> > >> > >>Hong > >> > >> > >> > >> > >=========================================================================== > > > > > >>To unsubscribe, send email to [EMAIL PROTECTED] and include in the > >> > >> > >body > > > > > >>of the message "signoff JAVA3D-INTEREST". For general help, send email to > >>[EMAIL PROTECTED] and include in the body of the message "help". > >> > >> > >> > > > >=========================================================================== > >To unsubscribe, send email to [EMAIL PROTECTED] and include in the body > >of the message "signoff JAVA3D-INTEREST". For general help, send email to > >[EMAIL PROTECTED] and include in the body of the message "help". > > > > > > > -- > Jose UML - http://www.newdawnsoftware.com/jose > Pondering RPG - http://pondering.newdawnsoftware.com > > =========================================================================== > To unsubscribe, send email to [EMAIL PROTECTED] and include in the body > of the message "signoff JAVA3D-INTEREST". For general help, send email to > [EMAIL PROTECTED] and include in the body of the message "help". > > =========================================================================== > To unsubscribe, send email to [EMAIL PROTECTED] and include in the body > of the message "signoff JAVA3D-INTEREST". For general help, send email to > [EMAIL PROTECTED] and include in the body of the message "help". > > =====================================To unsubscribe, send email to [EMAIL PROTECTED] > and include in the body > of the message "signoff JAVA3D-INTEREST". For general help, send email to > [EMAIL PROTECTED] and include in the body of the message "help". > > =========================================================================== To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff JAVA3D-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help".
