Those bryar bolts were a lot more work than it looks.

What was difficult about it?

Modern physics packages aren't designed for firing physical projectiles through space like that. Basically, they detect potential collisions by allowing objects to interpenetrate, and then correct the simulation by rewinding. Small, fast-moving objects can pass completely through level geometry.

Bullet has optional continuous collision detection, but unfortunately the implementation ignores the callback I was using to handle overlapping sectors and thing flags. I had to rewrite that component. I also had to scale up the entire game world, because Bullet has a hard-coded threshold under which nearby contacts are treated as a single contact.

Does that mean you could use a regular hitscan for projectiles with absurdly high velocities like used by mods? I recall many mods having odd collision behavior in attempting to emulate instant hit projectiles.

It shouldn't be a problem anymore. That said, I'm not interested in making the emulation accurate enough for mods in general.

Projectile speed in JK always drove me crazy. I mean you are literally firing lasers and bolts of energy yet ancient gunpowder weapons fire faster...

Hooray for projectiles!

(And on a mostly unrelated note, if you want JK to have some nicer muzzle flashes you should get the 2013 Patch and darthbabe96's muzzle flash mod. Link-tastic!)

Anybody know what controls the SPR framerate?

Does it ever vary?

It seems to, yes.

Ugh. You might try ZeqMacaw, I see him on Steam frequently. But I don't know if he's interested in helping with anything JK related these days.

Edit: Might it be related to the thing lifetime as specified in the template? Duration/number of frames? Maybe try adding or removing frames on an existing sprite in JK and see how the change is handled.

Yes, that's how it works. It plays the entire animation over the course of the explosion lifetime.

I don't have JK installed.

I'm impressed you're doing this from memory.

LIKE A BOSS

So here's some bad news.

The reason I had to write a new collision dispatcher is because Bullet was detecting collisions between projectiles and adjoins. I was previously filtering collisions using a broadphase filter callback, but Bullet continuous collision detection doesn't call it. In spite of this work, Bullet is still sometimes (non-deterministically?) detecting and responding to these collisions, which means Bullet ccd sometimes (non-deterministically?) handles its own dispatch. After reading the Bullet code it's still not obvious where and how ccd is implemented, just a few dozen references scattered throughout the codebase. A big ball of spaghetti heaped up right on top there. Unfortunately it won't work at all without ccd, so my options are to either keep excising chunks out of Bullet until it sorta works, or give up and write something that fits from the start.

I think it's time to admit defeat here. Bullet is really only designed for things that are close to the human experience: physically accurate, roughly human-sized objects bumping into other roughly human-sized objects, moving at roughly human walking speeds. JK's physics needs are already so far outside of what these physics libraries are designed to provide, like space that folds in on itself, and angular velocity defined using Euler angles over time (what). The next step is to get rid of it.

yeah, i like them computers

Have you tried contacting the Bullet devs? Even if Bullet is unsuitable they may have general insight into the problem?

I've read a lot of Erwin Coumans' posts on the physics simulation forum, and pretty much what I said. Honestly I was always going to have to replace it.

I actually got an opportunity to chat with Ray Gresko, and I mentioned this site and how you had made several posts criticizing how poorly many of the cog verbs were implemented. He was visibly upset.

Just thought you'd like to know this little fun fact.

I don't know why he'd be upset; the standard rule in software is that if you aren't embarrassed by code you wrote 6 months ago, you're doing something wrong.

Cog is bad, and provably so. The decision to avoid even trivial semantic analysis introduced literally thousands of defects, all unfixed by time of release, and several operators were implemented incorrectly. (The verbs themselves are fine, the language is what's the problem.)

I wish you'd spent the time asking him for details about JK physics and collision response instead.

Probably because this was in 2009 and he was having a grand time talking about how great Diablo 3 was going to be, and I jammed a stick in his spokes with my autistic criticisms of his work from the 90's. But hey, the group was a size of about 8.

amazing!

if you still need that hosted mediawiki let me know. i could probably set it up tonight

I think GBK's hosting it.

I come back to visit Massassi after years and see this. I'm floored. I never thought the project would be continued/forked/whatever. Good to see you on it, Jon'C. I have an old original Xbox and JTAG 360 I could send you someday if you want to do eventual console ports. There are non-DX wrapper modules out there for the original Xbox if you're using something like OpenGL, but I have no idea about Bullet. I don't know if anyone has the library running on the old Xbox.

Anyway, if either of those ever interest you let me know and I'll see what I can do about getting them up and running again/shipping them to you.

For some reason, mingw-make doesn't seem to support partial builds. This is amazingly time-consuming.

Special treat! Windows build for all you uncool non-Linux/OSX users who can't try it yourself with one terminal command.

Works for me. Dunno if it'll work for you.

Plz don't report bugs. But tell me if it doesn't work at all and I can try to fix it.

Installation:

• Put your episode and resource folders in the game sub-directory. Inside it. Not in the same directory as game.exe, in the sub-directory named game which is included in the zip.
• (Optional) Rip CD 1 audio to game\restricted\music\1, name the tracks 1.ogg up to 7.ogg. Must be ogg format.
• (Optional) Rip CD 2 audio to game\restricted\music\2, name the tracks 1.ogg up to 11.ogg. Must be ogg format.
• (Optional) Copy the ripped CD audio somewhere safe, because you'll need it again for later builds.

When you're done, it should look like this:


Usage:
run game.exe with the episode name and the name of the JKL file you want to play.

Examples:

• game "The Force Within" 06abarons.jkl
• game "Jedi Training" m10.jkl

Controls:

• W,A,S,D - movement
• Space - jump
• Left mouse - shoot bryarbolt.
• E - activate thing/surface
• G - give all inventory bins
• F1 - activate field light (if you have batteries)
• R - teleport to next walkplayer (if you get stuck or fall down somewhere)
• Esc - quit

Oh also contains a bunch of compiled GPL software. For licensing purposes: ask me here for the source code and I'll be glad to link you, or just Google the libraries because I didn't change them.

And, of course, what I've spent the last ~3 months doing:

Procrastinating Bullet is completely gone now, replaced with a bespoke artisanal hand-crafted physics simulation that's (probably?) more accurate to JK. Picked up path movetype blocking and the blocked message along the way, which would have been very difficult to get working with Bullet (getting a door slammed on you tended to eject you from the level before). New physics still needs a lot of tweaking, and there are a bunch of magic values I'm missing somewhere in this vast ocean of templates, but it's good enough for now. I can finally get back to more interesting things.

Mind uploading the copy of libstdc++-6.dll you used?

WOW!!!! One of the lost shadow lurking souls checking in!! this is crazy cool!! good work Jon'C

Updated with new zip.

confirmed working by gbk.

Apparently there are still a bunch of DLLs missing that nobody told me about.

EDIT: The last missing DLLs are in this download: http://sourceforge.net/projects/mingw/files/MinGW/Base/gcc/Version4/gcc-4.8.1-4/gcc-core-4.8.1-4-mingw32-dll.tar.lzma/download

I think. Someone let me know if there's still something missing.

(install ubuntu)

Crashes on Win7 x64. Tried on two different systems.

Problem signature:
Problem Event Name: APPCRASH
Application Name: game.exe
Application Version: 0.0.0.0
Application Timestamp: 527ef932
Fault Module Name: libstdc++-6.dll
Fault Module Version: 0.0.0.0
Fault Module Timestamp: 525049a5
Exception Code: 40000015
Exception Offset: 000159ff
OS Version: 6.1.7601.2.1.0.256.48
Locale ID: 1033
Additional Information 1: cb9d
Additional Information 2: cb9df02a872968e952cd9d58118b981d
Additional Information 3: 274b
Additional Information 4: 274b74b99511d7a85f8bc32881763048

Run it from a terminal (cmd.exe). It will tell you that it can't find files.

Make sure your episode and resource folders are in the "game" subfolder. Also make sure you don't have any non-LEC episode gobs or resource overloads in there.

I am running it from a terminal, using the same exact line you typed above;

• game "The Force Within" 06abarons.jkl

Here are the files I've got. I haven't had a JK CD in eons. Just a zipped backup I made a looooong time ago. So hopefully these are right. I removed what seemed like the add-on files.

drag Episode and Resource into the 'game' folder.

That did the trick. Thanks!

Wow! This is fantastic I don't suppose there is anyway to invert mouse yet is there?

Not yet. That sort of thing is polish.

Note to community: colormap headers contain three floating point values which are used to premultiply vertex colors in hardware mode. JK supports colored lighting.

yw.