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The tutorial cave is finished and some '''This Blog Post was part of the immediate follow-up content is also doneElder Game blog. I’m still adding a few more bits of contentIt was posted by Citan on April 16, but mostly it’s polish at this point2012.''' : Previous Post: [[Elder Game: Still Developing!]]: Next Post: [[Elder Game: Cows]]'''Additional Blog entries can be found on the [[Developers]] page or in [[:Category:Game Blogs]] '''
Since the last First up, news for pre-alpha version, I’ve changed a lot of the enginetesters: the database, the way items are handled, the way effects are generated, and on and on. So there’s a lot of under-the-hood improvements… and a lot of new bugs as a result, of course. But I’m starting to feel happier about the newbie experience, at least.
I’ve got three or four reusable puzzle componentsPre-Alpha testers: the server is back up for a couple of days! If you have an hour, please log in with a new character and have been dumping some extra content into test out the post-newbie cave newbie area . I would love to get your feedback on the density game from the start point up to where you leave that first cave. You can email me ([email protected]) or post on the target levelforum. (The other zonesLet me know what you liked, “Castle” and “Dungeon”what you hated, are basically untouched… that’ll what should be a different updateadded to make it more fun or more intuitive. Anything, really.)
SoIf you had an old character, yeah… still working at it’s been pseudo-wiped: itwon’t show up in your list, but if you make a new character with the same name, it will be partially restored. It’s taking too damned longDon’t make a character with an old name to test the newbie experience! You’ll appear in whatever area you used to be in, but and you’ll completely miss the new starting cave. Once you’ve done the newbie experience , though, feel free to reclaim your old character names if you want. The pseudo-restoration feature will have some cool stuff:only be available for a week or so, so reclaim ‘em if you want ‘em! Only a handful of characters had earned significant levels already, so it’s not a big deal for most people.
PuzzlesIf you emailed me to get into the pre-alpha and I haven’t replied, I’m sorry. I was waiting to have a server up and running to direct you to. I’ll be emailing you back soon!
Surprising Weather Phenomena!Server Instability
StrangelyOne of the things that’s been keeping me from putting the pre-colored crystalsalpha server back up is that it’s no longer as stable as it used to be.There’s a nasty memory leak in Unity 3.5, somewhere in the guts of the engine. and monsters!
New Tragic Curses To Befall Unwary Heroes! (This I’ve been trying to find the memory leak, but it’s very hard. It’s not caused by my code — that would be much easier to find. Instead, the game just slowly leaks heap memory, and the Unity profiler doesn’t show any new object allocations actually happening, so it’s happening somewhere deep inside. My best guess is a skill icon for it’s some subtle bug in the new pathfinding system — something about the Cowway I’m using it is causing it to leak. But I can’t find any solid clues.)
And lots So I’ve been doing the old programmer’s voodoo dance: “If I remove this, does it stop leaking? No… how about if I change this? No… how about…” Just randomly flailing to try to find clues about what causes the leak. I’ve wasted a lot of other stuff, tootime on this and still no luck.
Good News Players might get this crash it if they stay logged in for enough hours, but it’s not a super fast leak, so I don’t even really care about that right now. It’s a much bigger deal on the Money Frontserver. Since the server is up 24/7, a memory leak will eventually crash it. (It stays up between 2 and 6 hours. What determines how long it stays up? I don’t know!)
I don’t think I mentioned it yet, but my colleagues Adam and Chris (fellow co“The Server” vs. Sub-owners of FlashGameLicense.com) have agreed to help pay for the artwork on the game. It’s not a ton of money, but it’s a big push in the right direction, hopefully enough to get the basic customizations I need: playable races, a couple of custom monsters, and several scenery sets. Woohoo!Servers
I would love to have actual Myconians to go with The main game logic is written in Java and runs in SmartFoxServer 2X. This part is still very stable. But the Java code doesn’t understand the paranoid elves’ conspiracy theories about themphysical 3D world. I’d love to have It knows how many Hit Points everybody has, and all their other stats, and it knows their x,y,z world location, but it doesn’t know what’s really at that location. Is it on the squid-like demons from my novelization. And actually having ground? In the crazy Council buildings in water? On the game would be amazing… as opposed to just using whatever buildings I can findedge of a cliff? In a tiny house? It doesn’t know.
More custom art would be great… if I had more moneyTo answer those questions, there are separate sub-servers that interpret the 3D world.These sub-servers are written in Unity, and run in Unity’s “headless” mode (meaning they have no graphics output). They just quietly sit there moving NPCs around at the beck and call of the Java server. The Java server calls them “puppeteers”. It tells them, in effect, “Hey, drive Skeleton #511 around. He wants to kill Bob and his AI routines are a, b, and c. Let me know when he’s close enough to attack Bob.”
Kickstarter for More MoneyA player is talking to some NPCs. How does the server "see" this same scene?
On This is what the one hand, my plan has always been to make this game on server "sees". Those three white capsules are actually the cheap, elves and if it starts to attract users who pay, I can put that money back into the game. But on the other hand, it would be really nice to have competent art direction cow from the start, as opposed to going back after people are already playing and retrofitting the whole world to not look like crapprevious scene. So Everybody's a capsule on the idea of a Kickstarter campaign starts to seem pretty interestingserver.
Unlike some There’s a separate puppeteer sub-server for each area of the other MMO kickstarters out thereworld, I have an actual engine and controlling all the ability monsters in that area. It also spot-checks player behavior to do what I say I’m gonna do. Unfortunately, even see if I’m successful, the typical Kickstarter “success story” for games is earning $10,000. Which is great, and I’d put that to good use… but it’s not $100,000they’re cheating. (If it’s just $10k, maybe I should wait a while so that I have more concrete stuff. But if there’s player teleports through a gold rush nowwall, maybe I need to act fast…it can tell.)
So I’m still mulling all of this over. I really want to have this new playable version done soon so that I can polish it and let people try it. I suspect What Happens When There’s a Kickstarter campaign that included the line “and you can play a very early version RIGHT NOW” would be a neat thing to try… but honestly I’d need yet more content before I could do that. But with just the content in the newbie experience now, I should be able to get some decent gameplay movies, at least… so back to debugging I go!Server Crash
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But suddenly I’m thinking about what when I could do with even more money — a dozen custom monsters! Unique set pieces from the back story! That would be say “the server” crashes, that’s not really amazing to seeright. The server is actually pretty complex (surprise?) and has lots of parts, and only one part is crashing. But it’s an important part.
Unfortunately, these sub-servers are the ones that are running out of memory and crashing. And when they crash, the Java server is blind.
Players can still move around, but the server can no longer tell if they’re cheating. (They could be using wall hacks or teleport exploits and it won’t know.) But more importantly, all monsters suddenly stop moving. They just stand there, and you can stab them to death and take their stuff. They are puppets without puppeteers.
But the Java server has a pretty good backup plan when this happens. It deputizes players’ computers to act as puppeteers! It looks for a player in that area with a good ping rate, and secretly tells that player’s computer, “okay, now make Skeleton #52 move around. It has these powers and this AI routine. Tell me where it moves to!”
I’m pretty happy with this emergency backup system. When bugs have caused sub-servers to crash, testers mostly haven’t noticed. The monsters just stop moving for a few seconds, then start right back up again.
However, players do perceive this as lag. The monsters seem to get dumber and have more trouble chasing after players. That’s because there’s extra network latency now: instead of the server talking to a sub-server right next door, it has to talk to some computer in who-knows-where.
Plus, the server has to trust that the player’s client isn’t hacked. An evil player could take advantage of this and fling those monsters off a cliff, or into space, or whatever they wanted.
It’s a pretty cool backup system, but it’s not something I want to happen when the game is finished. (But I’ll still use it for some things, like modeling the insides of player housing, where cheating isn’t a concern. I don’t much care if you use wall hacks in your house. There’s nothing to fight!)
Watchdog!
But what I really need to do is get those crashed sub-servers running again. My first thought was to just use one of the many 3rd-party watchdog programs that check to see if your app suddenly dies, and if so, restart it. But I couldn’t use those.
The problem is that the sub-servers don’t just crash and die. Unity wrote special code to avoid that. Instead, they stay alive, but stop working, and they bring up a special message box asking the user to send a crash report to the developer. That’s a pretty nice feature for the game client… but it’s really weird when it happens on a remote computer running with graphics turned off!
So the regular 3rd-party watchdog programs can’t tell when the sub-server crashes because technically it’s still running, showing that special message. I had to write my own custom watchdog app that can detect when the sub-servers are crashed like that and shut them down. Then it starts them up again.
So now when a sub-server crashes, it comes right back up again within a minute.
Damn You, Memory Leak
The watchdog app is something I needed to have done anyway, so it’s not wasted work. But it’s not what I’d planned to be working on. And I sure didn’t plan on spending 30+ hours looking for a leak that isn’t even in my code.
But it is what it is. I’ll keep looking for it, but at least now it’s not a super huge issue. The game will keep running, more or less.
Next time: cows, pets, and the eventual consequences of death.
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