Question: How is the limit of turrets for the engineer set?

[countnoobula]

Hi all,

I truly appreciate all of recent opensourcing of code, and it's an incredible dive into a history of gaming.
I've only just begun to look through the code, and I'll be honest that C++ is not my forte, but it's a part I've always wanted to know/been curious about, and unfortunately I don't see discussions tab so I opted to open an issue.

I have always wondered since TF2 had the one event (I think it was defending against robot invasion?) of where the engineer could build two sentry guns, how/where is that limit defined, and then overriden for the game mode?

That particular change of gameplay mechanics, and the awe of it always stuck with me and I've always wondered where it is defined.

If someone would be so kind as to help, or if I find it I'll comment to this. I am incredibly curious to finally answer the near decade long question of how it was done.

I appreciate all of the help, efforts and sharing 🙏

---

Update:

So far, I have tracked there is a use count that is incremented and decremented at

source-sdk-2013/src/game/server/tf/tf_obj_sentrygun.cpp

Line 2080 in 0759e2e

sentryHint->DecrementUseCount();

but I have yet to fully understand it

[beachbagging]

Might be this -
// Maximum number of a type of objects on a single resource zone

source-sdk-2013/src/game/server/tf/tf_obj.cpp

Line 116 in 0759e2e

#define MAX_OBJECTS_PER_ZONE 1

[DevGeah]

It is not the second one. Looking for it currently.