Re: [sdljava-users] Getting the lay of the land

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--- "Ivan Z. Ganza" <iva...@ya...> wrote:

> Greetings John and Welcome,
> 
> I'll try to answer your questions as well as possible. 
>

Thanks for the quick reply Ivan.

> |1. It looks like sdljava has recently removed it's J2SDK 1.5
> |dependencies. Was this done for compatibility with GCJ &
> |Classpath?
> 
> The main reason was because there were concerns with the performance of JDK
> 1.5 as well as others reasons I can't currently remember.     I think we
> should try to remain compatible with GCJ and Classpath if possible so I am
> glad it currently is.

The docs page http://sdljava.sourceforge.net/documentation.html
could probably use a tutorial as well as a faq. FWIW, I'm moving
my own sdljava notes here:
http://www.simisen.com/jmg/pmwiki/pmwiki.php?n=Main.Sdljava

> |2. I noticed that there's a gljava page:
> |http://gljava.sourceforge.net/ . Is there currently an
> |effort going on to compartmentalize the OpenGL part out
> |of sdljava? Can I use gljava without sdljava?
> 
> The open gl part was designed so that it doesn't know anything about the sdl
> part.  So you can use the open package on it own.  The problem is you need to
> initialize opengl somehow.  I actually have code that uses glut to initialize
> the display but I never was able to get it to work.  So the only option is to
> initialize the display with calls to sdl.
> 
> |3. I'd originally started my search looking for a simple
> |Java wrapper around freeglut. Is there such a beast roaming
> |the countryside? :) *That* plus gljava would probably be
> |just what I'm looking for...
> 
> I'm not sure if a java wrapper exists.  Looking at the API it shouldn't be
> too difficult to make one though.  Following the same pattern as sdljava with
> SWIG...
>
>
> |4. How do I open a window for drawing in with sdljava?
> |Do I need to use JOGL? AWT? Swing? (Again, maybe this
> |is back to freeglut).
> 
> Have a look at testsrc/org/gljava/opengl/OpenGLTest3.java

Ahh. Thanks! Just what I needed. A faq on the docs page of the
sdljava site would very likely be useful. Here's an item to
kick it off:

"Q. I'm not familiar with SDL and would rather use freeglut
with Java. Can you point me in the right direction?

A. Using SDL instead of freeglut (the free version of GLUT)
isn't as bad as you think. Have a quick look at the example
code in sdljava-0.9.1/testsrc/org/gljava/opengl/ to see what
we mean. :)"

> |5. Why no sdljava-specific group at
> |http://www.javagaming.org/ ?
> 
> I wonder if sdljava has enough traction for this...?

I asked about it here:
http://192.18.37.44/forums/index.php?topic=10531.0
http://192.18.37.44/forums/index.php
in the LWJGL section.

IMO, excellent docs *make* a project. I bet that after
you've got a faq and a tutorial up, you'll gain even
more momemtum.

If I can get sdljava running nicely on FC4 with the
GNU Java tools, I may be able to help out with some docs.

---John

> -Ivan/
> 
> John M. Gabriele wrote:
> 
> >Hi,
> >
> >I'm just dipping my toes into doing some Java 3D stuff,
> >and it looks like I've got about three options:
> >
> >JOGL,
> >LWJGL, and
> >sdljava
> >
> >I'm hoping someone can fill me in on some of the pros and
> >cons of the different toolkits, and why I might want to
> >use sdljava. I'm mostly interested in small physics
> >simulations (hobbyist stuff).
> >
> >I'm running Fedora Core 4, and trying to go with an all-
> >free software setup. I want to natively compile with GCJ
> >and run with libgcj + Classpath.
> >
> >So, here goes:
> >
> >1. It looks like sdljava has recently removed it's J2SDK 1.5
> >dependencies. Was this done for compatibility with GCJ &
> >Classpath?
> >
> >2. I noticed that there's a gljava page:
> >http://gljava.sourceforge.net/ . Is there currently an
> >effort going on to compartmentalize the OpenGL part out
> >of sdljava? Can I use gljava without sdljava?
> >
> >3. I'd originally started my search looking for a simple
> >Java wrapper around freeglut. Is there such a beast roaming
> >the countryside? :) *That* plus gljava would probably be
> >just what I'm looking for...
> >
> >4. How do I open a window for drawing in with sdljava?
> >Do I need to use JOGL? AWT? Swing? (Again, maybe this
> >is back to freeglut).
> >
> >5. Why no sdljava-specific group at
> >http://www.javagaming.org/ ?
> >
> >By the way, I'm starting to keep a small info page on
> >this stuff here:
> >http://www.simisen.com/jmg/pmwiki/pmwiki.php?n=Main.JavaOpenGL
> >Maybe it'll turn into something useful.
> >
> >Thanks,
> >---John
> >
> >
> >
> >		
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