To swim, or not to swim...

[John Adams]

Zcoretri (or anyone who knows),

When a player leaves solid ground and goes into water, the animation changes to swimming. Same is true for climbing ladders, and probably a few other non-Land animations.

My question is, is there any kind of packet that is set from client->server to tell the World your character is now swimming? Ie., you are drowning... it knows to track this only if you are underwater, not breathing.


What I am getting at is how to keep fish from coming on land. If we know when a player hits water, do you think we can know when a fish hits land, and to stop them?

Found this old thread: http://eq2emulator.net/phpBB3/viewtopic.php?f=3&t=434

[Scatman]

Yes, it's actually the client who tells the server when they've reached water and is drowning, reached water and is not drowning, or left the water. In Player::ProcessMovementData it is processed. That function is called from Client::HandlePacket in case OP_UpdatePositionMsg at player->PrepareIncomingMovementPacket.

Since this is the client (eg. not a computer spawn), this code won't get hit for NPCs.

[John Adams]

Thanks Scatto. Yeah I knew about ProcessMovement and the drowning, but the client doesn't start "drowning" the toon til air has expired, right? I mean, I can swim around all day and the server has no idea I am on land, in the air, or under water... til my breath bar runs out. Correct? Soon as I am out of breath, the opcode for Drowning gets sent and the server starts whittling away my HPs til I'm dead?

I haven't thrown myself into a lake of fire lately, but I'll try that tonight, see if I get Breath, or Burning - client-side.

So, if we wanted to process NPCs movements, we'd have to write that still, huh?

[Scatman]

Not exactly. A character flag gets sent from the client to tell a status of whether you're in the water or not too, just not for drowning. Some #defines:

UPDATE_ACTIVITY_RUNNING
UPDATE_ACTIVITY_IN_WATER_ABOVE
UPDATE_ACTIVITY_DROWNING
UPDATE_ACTIVITY_DROWNING2

[John Adams]

Hmm, I don't think I've ever seen those getting sent when I was obsessing over why DoV clients drowned almost instantly.

But this really is about Bladefin, chasing me out of the lagoon onto the solid ground. He needs to stay in the damn water!

[xinux]

[TILT]

That's funny lol

[John Adams]

FYI, I got ahold of Andrew (from the original HIT post) and luckily, his email was still hooked up. He sent me back a link to where his latest work is stored, on GoogleCode.

http://code.google.com/p/openzone2/

Check it out, see if this helps make sense of our terrain mapping issues.


Thank you, Andrew!