1) Does the openGL render works with Linux and other operating systems?

It should. There are binaries of LWJGL for Linux or you have to compile it yourself. Have a look at the LWJGL homepage at  http://www.lwjgl.org I never tried it though because i don't have a system running Linux (just FreeBSD... :wink: ).

2) Is there a set-method to change the samplingmode?

You mean switching between under-/over- and normal sampling without constructing a new FrameBuffer? No, there isn't because each change of the used mode actually requires the construction of a new FrameBuffer (because the backbuffer as well as some minor things are different everytime). Encapsulating this in a innocently looking setXXXX()-method doesn't express this well enough IMO. I promise to have a second look at this decision though.

You can't. All that's supported is to add texture names behind each triangle definition but that's close to being useless. Support for JAW in jPCT is a relic and unless you are looking for a dead simple format to read a bunch of untextured triangles, it's NOT the format of choice. ASC and/or 3DS should be much better and if size is not an issue, maybe the XML-format is an option too.
Hope this helps.

Edit: I've uploaded all the meshes i have in JAW-format...http://www.jpct.net/download/jaw.zip

0.94 is out (see the News-section for more details).

I decided to release it today, albeit i haven't managed to include all the things i wanted to. Anyway, there always another version... :wink:

Changes can be found here: http://www.jpct.net/changes.html

In addition, i added a small chapter about optimizations to the manual and a new example is in that shows how to do something first person shooter like with jPCT.

Have fun!

The display mode selection of this demo is very basic to keep the code simple, so i just barks when it can't find one instead of trying another one.  Maybe your cards can't do the requested 800*600*16*24 in OpenGL for whatever reason. Or try fullscreen with "refresh=0" instead. Which card are you using?
I've uploaded a new version that should be a bit faster and supports some more command line switches.
Anyway, here's an overview of the switches it supports:

-fullscreen
-mipmap
-trilinear
-16bit
-width=xxx
-heigth=yyy
-refresh=rrr
-zbuffer=zzz

I hope it's possible to find a mode that works by combining those switches.

I'm still working on the sources...the collision detection is driving me nuts... :?

Ok, i've added support for a wireframe mode for both, software- and GL-renderer. It will be included in the next release (0.94) which isn't too far away if everythings goes as planned (maybe in a week, maybe tomorrow...who knows...).

Your idea with the VertexController is something i came up with too, but it would require a complete construction of a transformation matrix for EVERY VERTEX if the method to do the projection would be as simple as project3D2D(SimpleVector...). Another option would be to transform a whole bunch of vertices with one call but this isn't cheap nor very elegant either. That, and the VertexController doesn't give you information about how the vertices are connected. So you are ending up with a soup of projected vertices but you wouldn't know how to connect them to form triangles.
To make you understand why there is no wireframe support in jPCT: There is no line-algorithm in jPCT...simply because you don't need one for the things jPCT is doing. However, there is one in Java, but i can't use it because it can't be used on a MemoryImageSource and therefor i would break 1.1 compatibility if i would use it. Another point is, that the OpenGL wireframe mode draws something like textured and lit outlines of the polygons and not just simple "white lines". To emulate this behaviour in software, i would have to use the texturemapper with a kind of degenerated triangles...i tried this once, but it didn't work too well on flat edges.
As you can see, there are some problems with wireframe... :wink:
How important is wireframe mode for your project  :?:

Edit: Would it be sufficient to draw the whole scene in wireframe or are you talking about "wireframing" certain objects only?

it's called 3d exploration, it's about 2 years old.  I downloaded it from some guys web page.   I found out later that it has become 'Deep Exploration' .   Which is a commercial product.    I don't know if the version I have is a freeware/shareware, a crack or what.   I haven't tried it yet, but I will in the next couple of days.  I'll let you know how it works.

Deep Exploration can load Half-Life maps?  :shock:
I know that it can load Half-Life models but i'm unsure about the map-format itself...
Too bad that i don't have any Half-Life maps ATM to try that, because i do own Deep Exploration (but only 2.0...3.0 is current). It's a GREAT tool...i just love it.