Facing the target check mechanism

[citrot]

Hi!

It is checked on client side, when player starts a casting or finishes one, it should face the target, or action fails. Looking for some tips, how to find the mechanism, where client checks it (32-bit client, gonna test it only on private servers).

[Filint]

I've not done this personally, but... My first thought is that to deduce whether you are facing the target it will need to know the direction you are facing (angle). So it might be a good idea to have a look for functions referencing that.

A good idea is to grab an old named idb and Poke around in Ida, see if you can find it there, then find the same thing in the latest version.

Good luck

[LogicWin]

Here ya go:

http://www.ownedcore.com/forums/worl...ml#post1605894 (Click to move?)

[Jadd]

I believe Spell_C_IsUsableAction checks for everything you could want before casting a spell, including facing requirements, distance requirements, and so on.

__cdecl bool Spell_C_IsUsableAction(CGUnit_C *unit, SpellRec *spellSource, SmartGuid &spellTarget, ItemRecSparse *itemSource, bool ignoreControlState, bool includePetSpells, bool ignoreSpellTokens, bool ignoreShapeshiftRules)

If you want to check if a spell is castable, itemSource may be null. ignoreControlState determines whether we should ignore stuns etc. when determining the outcome. Other bool values should be false generally.

[citrot]

Hi!

In nutshell, have no clue, what to do with info written on that topic

Checked the whole topic. Probably i do not understand it fully. Somewhere in time of wow patch 3.1.3 9947 there was a tool named "BhTool", and with that loaded into the memory, extra functionality was possible to trigger. Or something like that. Now that tool is gone long time ago, and even if i can obtain a copy of that from folks around (minimal chance i guess, as its a 6+ years old story), there is no private server i found with that version to check control flow, how it did work in respect of facing the target. Also, there is 6.x time now, even for private servers, and wow got many upgrades in design too. Of cource i will search around bhtool, however that path seems pretty cold already. If you have relevant code snippets / control flow docs of native client from those days (still a chance to recognize it in ida), let me know.

[Filint]

Jadd has given you the name of the function to investigate:

Spell_C_IsUsableAction

So with that and a named idb you should easily be able to figure out what's happening. A Named idb can be found with a simple search. You can then check the recent info dumps and go from there.

If using Ida and reversing it yourself is too difficult at the moment, I would suggest that perhaps it's not yet time to approach this project. If so, practice a bit first, read some other material, and come back to this in a few months time.

Good luck.

[citrot]

If i had history for that functionality from older versions, there will be no problem. I am searching in this question first time, this is the very beginning. If you have the point, which function name to check, please, let me know. I will find it on version dump thread topic, and i will be fine from that point on.