Finding the "thrower" of a molo/incin for inferno_startburn events

[n1c]

Hey Saul; thanks so much for the awesome lib and all the effort you put in!

I've been working on something to parse demos and get all the he/smoke/flash/molo/incin data. For all the others it's been relatively straight forward to match up the start & end locations (of a throw) by getting the event userid on weapon_fire and then matching it up when seeing the corresponding event like flashbang_detonate or hegrenade_detonate.

From what I can tell though there is no userid in the inferno_startburn event? Have I missed something or is there some special trick to finding out who threw a moly/incin in the startburn event?

Thanks in advance!
Nic.

[saul]

Grab the entity of the grenade from the entityid event variable. You can then do .owner to get the player that threw the grenade. This may be null if the player threw a grenade then disconnected before it detonated.

[n1c]

Thanks for the quick response!

If I have demo d and event e of type inferno_startburn, should I be able to d.entities.getByHandle(e.entityid)?

I've tried a few and just seem to be getting nulls, while there is a value for e.entityid.

[saul]

It’s not a handle - it’s an index. Try d.entities.entities[e.entityid]

[n1c]

Ah that did the trick, I'd tried d.entities[e.entityid] but guess the entities.entities eluded me. Thanks!

[saul]

No problem @n1c

[madsboending]

Hey @n1c

If you don't mind me asking - how do you "link" the two events hedetonate and weapon_fire?
I'm a complete beginner regarding Node and JS in general, so I apologize for what I fear is a simple question. This is my current approach:

`const demofile = require('demofile');
const fs = require('fs');

fs.readFile('C:/Users/Gamer/Desktop/2018/csgo_demo_parser/match730_003301150011605123236_1345725134_136.dem', function (err, buffer) {
let demoFile = new demofile.DemoFile();

demoFile.gameEvents.on('hegrenade_detonate', e => {

let currentTick = demoFile.currentTick;
let thrower = demoFile.entities.getByUserId(e.userid);
let throwerName = thrower ? thrower.name : 'unnamed';
let eventName = 'hegrenade_detonate';
let detonatePosition = { x: e.x, y: e.y, z: e.z };
let userid = e.userid;

console.log(${currentTick}, ${userid} ,${eventName}, ${detonatePosition.x}, ${detonatePosition.y}, ${throwerName} );
});

demoFile.gameEvents.on('weapon_fire', d => {

let currentTick = demoFile.currentTick;
let thrower = demoFile.entities.getByUserId(d.userid);
let userID = d.userid;
let throwerName = thrower ? thrower.name : 'unnamed';
let throwerPositionX = thrower ? thrower.position.x : 'unnamed';
let throwerPositionY = thrower ? thrower.position.y : 'unnamed';

console.log(${currentTick}, ${userID}, ${d.weapon}, ${throwerPositionX}, ${throwerPositionY}, ${throwerName});
});

demoFile.parse(buffer);
});
`
It has several issues(prints every weapon_fire event and not just HE), but I can't figure out how to link the two events and e.g. just write one line to a file that contains the position of the player when he throws the grenade and the position of the grenade when it detonates.

[n1c]

Hey @madsboending; I kinda scrapped this together quickly so hopefully it makes sense: https://gist.github.com/n1c/27dc159ad09740953ea760d7dc1f4ace (also it's in TS hopefully that's still useful)

Maybe Saul can confirm 😉

[madsboending]

That helps ALOT! Thank you so much @n1c ! But I'm a bit unsure what you achieve by listening for "round_officially_ended"?

I'm still struggling with figuring out how deep in a round the HEs were thrown, I know I need to substract currentTime of the round_start from the currentTime of the throw, but can't seem to wrap my head around it.

[n1c]

The grenades hash it used for tracking which grenades have been thrown in the round, and in round_officially_ended it's cleared out, this is just to make sure that anything that didn't get caught in the current round doesn't go over and cause bugs. It'd probably be fine to remove that but Safety First! :)

For the time you can probably do something like listen for the round_start event, and put that currentTime value into a variable. Then in the throw even roundStartCurrentTime - throw tick currentTime will be what you want,

[saul]

Thanks for this @n1c - looks perfect!