BD-J flight demo

[Nuclear Bit]

Hi

I reworked some of my old terrain rendering stuff I used to play around with in the PDA days. It used to be in C on the PDA, now I just did a very quick port to java (not using fixed point arithmetic but floats in stead).
I don't get it as snappy as I want, could be optimized a lot further.

extract the AVCHD folder to some USB storage device and run it
Use the arrow keys to turn and control the speed, use the square and X to change the altitude of the player's view.


the flight2 directory has the source, see how small the actual render routine is. It is a ray caster based on this article : http://www.tecgraf.puc-rio.br/public..._rendering.pdf

I uploaded the file to rapidshare, since attachments in this forum do not seem to be working for me (quota exceeded)

link : http://rapidshare.de/files/40209903/flight3D.rar.html

have fun

[Cooguy1212]

How did you port C to java?

[Nuclear Bit]

Originally Posted by Cooguy1212

How did you port C to java?

rewriting it may have been a better word choice than 'porting' it.
The render routine in C used a lot of pointer arithmetic in order to directly write to the video backbuffer, all of this had to be replaced by buffered image operations in java (making it slower of course) . I also removed the fixed point operations, since I had no fixed point lib for java available. Sure it would be faster with a decent fixed point lib, I guess they do exist, but I didn't bother searching for one yet (or implementing one).
However apart from the memory addressing the routine stayed pretty much the same.

I also wonder why the MemoryImageSource is not working which I tried to use first, it seems that this is not supported in BD-J. As an alternative I found the DVBBufferedImage which has a setRGB() where you can pass an array of rgb pixels. This results in an extra copy from the renderbuffer to the backbuffer ... all causing loss in speed of course.
hope that someone finds a better or faster way to blit pixels so we can go full screen at 25fps
-=Double Post Merge =-
btw the terrain texture and heightfield were created with L3DT http://www.bundysoft.com/L3DT/ great software and free version available, you can easily recompile and provide a new land.jpg and height.jpg file, the size of both files is 512x512

[Sir_Axxewraith]

Any screens ?

[Nuclear Bit]

in attachment a screenshot from the pc version which is basically the same but coded as an applet in stead of an xlet

[Sir_Axxewraith]

Don't worry about it. It looks fantastic to be honest. I'll try it later on tonight.

[ct-boy]

Awesome dude I will try it later is it 3d? Cos if it is then finally it shows the true power of BD-J homebrew that some people said we may never go further than snake.

[Nuclear Bit]

yes it is 3D, not polygon based but voxel based

[ct-boy]

hey Nuclear I was wondering if it's actually you on ps3hax.net that has posted this too look here:

http://www.ps3hax.net/showthread.php?t=6136

[Nuclear Bit]

yes that was me.
I just finished a fixed point version which is a lot faster and runs really smooth,
download and try it from:
http://rapidshare.de/files/40207470/flight3D.rar.html

basically it looks like the JVM used in the PS3 has no hardware accelerated float/double support, so you'll need to use fixed point if you want speed

[nvidiaman]

Very nice work! Thanks a lot!

[Nuclear Bit]

Originally Posted by nvidiaman

Very nice work! Thanks a lot!

wait until you see the version with distance fog, even better...

done:
fog has been added + new map

[arnookie]

Can't wait to see the version with distance fog,
Could you make a game like humanoid alert or galaxians?

[Nuclear Bit]

Originally Posted by arnookie

Can't wait to see the version with distance fog,
Could you make a game like humanoid alert or galaxians?

Distance fog has been added, just download the rar again from the top post and have a look

[arnookie]

Hope we see some good stuff come from this, The main problem I can forsee is that only one app can be run off a memory stick at a time.
Expecially as the bj exploit won't allow access to other folders.
Good work though keep it up.

[dragula96]

Originally Posted by arnookie

Hope we see some good stuff come from this, The main problem I can forsee is that only one app can be run off a memory stick at a time.
Expecially as the bj exploit won't allow access to other folders.
Good work though keep it up.

that's not true, the problem is that no one has taken the time to crate a launcher.

[arnookie]

Bj Exploit dose not allow reading and wrighting to folders. This makes a loader very hard to make.

[pcostabel]

Originally Posted by arnookie

Bj Exploit dose not allow reading and wrighting to folders. This makes a loader very hard to make.

Couldn't the Blu-Ray menus be used for this? Since the memstick basically mimicks a Blu-Ray disc, it should be possible to choose the application to launch this way.

[Iconic_187]

does this app take advantage of the sixaxis feature on the ps3 controller...

[Nuclear Bit]

Originally Posted by Iconic_187

does this app take advantage of the sixaxis feature on the ps3 controller...

No, it doesn't : control is very basic now,
sixaxis control would be great, but since BD-J is basically a spec for all blu-ray devices it is not very likely we can capture that input...
-=Double Post Merge =-

Originally Posted by pcostabel

Couldn't the Blu-Ray menus be used for this? Since the memstick basically mimicks a Blu-Ray disc, it should be possible to choose the application to launch this way.

yes I think so too, you'll need a BD authoring tool to do this

[zmathue]

Originally Posted by arnookie

Hope we see some good stuff come from this, The main problem I can forsee is that only one app can be run off a memory stick at a time.
Expecially as the bj exploit won't allow access to other folders.
Good work though keep it up.

Originally Posted by arnookie

Bj Exploit dose not allow reading and wrighting to folders. This makes a loader very hard to make.

Originally Posted by Savagefreak

It isn't. a damn. exploit.

And if you permissions are right then according to the BluRay Spec. (That's what allows bd-java not an "exploit") you should be allowed the ability to read, write and launch other xlets from any storage medium.

[arnookie]

Sounds as though this could turn out quite sweet for ps3 owners.
Lets hope for a leap in what can be done with this. Yes you are quite right about it not being an exploit. Sony should be cool about this and not try to block it, it is after all a feture of the ps3. Not sure about the fact that it is not running from a blue ray disk though, Although sony left it open to run off memory card / stick anyhow so can't see it as a problem.

[Savagefreak]

Originally Posted by arnookie

Bj Exploit dose not allow reading and wrighting to folders. This makes a loader very hard to make.

IT ISN'T A GODFORSAKEN EXPLOIT!
Anyway, very nice.

[dragula96]

Originally Posted by arnookie

Bj Exploit dose not allow reading and wrighting to folders. This makes a loader very hard to make.

what i ment by loader is: a menu to select different bd-j applications off the same usb stick.

what i did not mean: a loader to load ps3 games off the hard drive.

THANK YOU.