Server Help :: View topic - Detecting Mines

Server Help

ASSS Questions - Detecting Mines

Initrd.gz - Wed Feb 11, 2009 1:04 pm
Post subject: Detecting Mines

How do I detect laid mines? (preferably in python)

Also, is there a way to detect if a mine has gone off?

D1st0rt - Wed Feb 11, 2009 3:46 pm
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Mines are sent with the weapon fired information of a position packet. You'll want to have a callback for C2S_POSITION using net->AddPacket. Then you would need to check the pkt->weapon->type for being W_BOMB or W_PROXBOMB and pkt->weapon->alternate for being 1.

The only way I know for sure to detect if a mine has gone off would be to turn on watchdamage for everyone, which is in general not a good idea. A less reliable method would be to keep track of where all mines have been laid and see if any player comes close to them. You would obviously then have to monitor for players going into safes, changing ships, etc for that as well.

Samapico - Wed Feb 11, 2009 9:46 pm
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Mine alive time expiring too

Could it be possible to turn on watchdamage temporarily for people who come within X pixels of the mine, and turning it off again if they go away?

That could give you the "accuracy" of the watchdamage, without the massive server lag for watching everyone.
The only thing you need to keep track of is changing ship, going in safety and mine alive time.
Oh, and enemy repels

Also, if you have wormholes and if they affect bombs, a mine will instantly turn into a bomb if laid close to it, so you'd have to check for that too.

Dr Brain - Thu Feb 12, 2009 9:18 am
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watchdamage isn't quite enough to detect a unique mine hit anyway. For example, if someone laid a bunch of prox mines close together, and a player hit just one... which one did he hit? You'd still need to do some position and prox checking.

JoWie - Thu Feb 12, 2009 11:51 am
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You would also need to factor in lag. A player could have hit the mine on one one screen, but not on another.

Samapico - Thu Feb 12, 2009 12:36 pm
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Dr Brain wrote:

Well, you could do the prox checking 'after' the hit though. Player gets hit by a mine, check where he is, scroll through the list of known mines and check which one is more likely to have blown up

But yeah, because of lag, everything gets tricky, because the same mine could hit/kill more than one player at different times, as JoWiE said.
So you'd still have to keep mines that you consider as 'blown up' in the list until they expire (safety, alive time, ship change) and conclude they were blown up a second time if someone in the area blows up because of a mine by the same person and there were not any other mines laid near...

Yeah it gets pretty tricky :S

D1st0rt - Thu Feb 12, 2009 3:59 pm
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What you might want to do, if mines are a 1 hit-kill is have a command (or if you wanted to get really fancy, use brick drops) to lay a "mine" which would be a region with an lvz image on the map. Then if a player entered that region you could use a fake player, say <mine>, that you use to kill that person off and then give +1 on the kill stat to whoever laid the mine. You could even get into things like, if they have above a certain energy level you just prize them an energy depleted, otherwise you go on with the killing bit.

Dr Brain - Thu Feb 12, 2009 6:49 pm
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D1st0rt wrote:

Even simpler, you can hijack the player that laid the mine for the kill, rather than dealing with a fake.

But yes, a server side solution will be much easier to implement, though it can be a bit limiting.

D1st0rt - Thu Feb 12, 2009 8:26 pm
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That was my first impulse but I didn't want that player to potentially jump around from the spoofed position. I suppose if that player is the only one you're sending it to and he's dying anyway it doesn't much matter though.

Initrd.gz - Sun Feb 15, 2009 1:13 pm
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I dont really _need_ to detect mines going off. I just wanted to prevent abuse (making the fake absorb some bullets/bombs).

Thanks for your help. Now read my other post on fake turrets please