[Matheus28]

Can I give the mappers, the ability to create a custom entity like func_nobuildfw (brush entity)?

How Can I detect these entities in my plugin?

[bl4nk]

Custom entities can't be made without some serious extension work.

[Matheus28]

But if I just want to make a brush entity (no keyvalues, nothing, just a brush entity), I'll need to make a extension?

[rhelgeby]

It's possible to modify entities in a map before it loads (modifying BSP loaded in memory). Stripper: Soruce do this, so maybe it's possible to add stuff too.

But this is not for beginners.

[p3tsin]

Originally Posted by Matheus28 Can I give the mappers, the ability to create a custom entity like func_nobuildfw (brush entity)?

Supply the mappers with a custom .fgd file containing the properties and whatnot of your entity.

Originally Posted by Matheus28 How Can I detect these entities in my plugin?

Originally Posted by rhelgeby It's possible to modify entities in a map before it loads (modifying BSP loaded in memory). Stripper: Soruce do this, so maybe it's possible to add stuff too.

You got 2 chances on reading (and modifying) bsp data.
1) hook CBaseEntity::KeyValue() and parse the input given to detect your custom classname. You then need to rename the classname to something valid or else your entity will be dropped upon reaching the engine (since its of invalid entity class)
2) the SDK Hooks extension exposes raw bsp data in its OnLevelInit forward. Have fun manipulating it.

Personally I think #1 is easier to manage but since theres no extension available for public that hooks the function, you're pretty much left with #2.

Originally Posted by rhelgeby But this is not for beginners.

[MockingBird]

What do you need it for? There is probably an easier way to do what ever your thinking of doing

[pRED*]

CEntity can hook entities being created and will switch the classname out for one that actually exists.

Adding hooks for keyvalues wouldn't be hard, it's on my todo list but I haven't had a need yet.

[Matheus28]

I need to make a area that the players cannot create props (In my plugin, you can create props)