Template talk:O

Empirically determining !activator and !caller

It's easy enough to guess oftentimes, but I was wondering if there was a more error-proof way of determining them (be it reading source code or setting up an I/O chain).
— SirYodaJedi (talk) 09:23, 24 April 2025 (PDT)

Reading the source code is mostly error proof by just checking what parameters is .FireOutput or .Set called with for example. Checking out activator and caller in IO can be done like this

Example with checking activator and caller of OnTakeDamage output of prop_physics. I aimed at it and used !picker to target it and addoutput to it first in this case. Then paused the IO. Shot the prop_physics and checked with dumpeventqueue command.

] ent_fire !picker addoutput "OnTakeDamage whatever"
] ent_pause 
Pausing entity I/O events
] dumpeventqueue 
Dumping event queue. Current time is: 941.23
   (940.83) Target: 'whatever', Input: 'Use', Parameter ''. Activator: 'Nescius', Caller 'prop_physics'.  

Or also in games with vscript can use something like ent_fire !picker AddOutput "OnSomething !caller:RunScriptCode:printl(self)" which will print the caller

Example of checking OnUser1 output.

] ent_fire !picker addoutput "OnUser1 whatever"
] ent_pause 
Pausing entity I/O events
] ent_fire !picker fireuser1
] dumpeventqueue 
Dumping event queue. Current time is: 955.63
   (955.63) Target: '!picker', Input: 'fireuser1', Parameter ''. Activator: 'Nescius', Caller 'Nescius'.  
Finished dump.
] ent_step 1
] dumpeventqueue 
Dumping event queue. Current time is: 955.63
   (955.63) Target: 'whatever', Input: 'Use', Parameter ''. Activator: 'Nescius', Caller 'prop_physics'.  
Finished dump.

--Nescius (talk) 09:55, 24 April 2025 (PDT)

Reading the source code is mostly error proof by just checking what parameters is .FireOutput or .Set called with for example.

Okay, if I'm reading CBaseEntityOutput::FireOutput() correctly, it looks like it's .FireOutput(value,!activator,!caller,delay), with value and delay being optional. If I remember C correctly, "this" should be !self.
— SirYodaJedi (talk) 11:08, 24 April 2025 (PDT)