UseItem parameters

[namreeb]

Does anyone know what the parameters are to UseItem? The first one seems to be a pointer, but I have no idea to what. When I use a conjured water, the pointer points to 0x001EFAA8, when I use a "Tough Hunk of Bread" it points to 0x001EFAA0.

The assembly of the functions which call UseItem are very confusing to me. I can't figure out ultimately where the value comes from. My best guess is it may be a pointer to the client cache db or something.

The second parameter seems to always be NULL, and ecx points to the object structure.

Any insights?

Also, to temporarily bypass this issue I thought I would use Lua_DoString("UseItemByName(...."), but that crashes WoW. Are the Blizzard-ui-only restrictions enforced on calls to Lua_DoString?

[lanman92]

Try updating TLS and make sure you're using the right params, etc. for DoString(). I'll look at it and see if I can provide any insight

[ramey]

First, the blizzard ui only aren't enforced on DoString, so you're calling it wrong somehow.

Um... Not sure at all but perhaps its a pointer to the CGItem_C. I could be completely wrong, just a guess.

I'll let you guess about the ecx bit, dunno about 2nd param being null

[Jadd]

Watery-bread lives in between at 0x001EFAA4.

:P

[Gorzul]

Which offset do you use for Lua_DoString? Lua_DoString("UseItemByName(...)") works perfectly fine for me.

[namreeb]

First, the blizzard ui only aren't enforced on DoString, so you're calling it wrong somehow.

Um... Not sure at all but perhaps its a pointer to the CGItem_C. I could be completely wrong, just a guess.

I'll let you guess about the ecx bit, dunno about 2nd param being null

ecx is the object in question (the "CGItem_C"). The 1st param is not an object (that is, casting it to one and calling GetObjectName crashes the app).

Which offset do you use for Lua_DoString? Lua_DoString("UseItemByName(...)") works perfectly fine for me.

[11:10:59]: 0x0049AB60 -> Lua_DoString

Casting spells works fine with Lua_DoString