Succesfully reversing LUA functions

[Jokur]

Been looking at this for a couple days. Trying to determine the direction of 'Eclipse' arrow on a Druid Boomkin. The LUA function;

local direction = GetEclipseDirection()
if direction == "moon" then
    DEFAULT_CHAT_FRAME:AddMessage("Cast Nature spells to move toward a Lunar eclipse!")
elseif direction == "sun" then
    DEFAULT_CHAT_FRAME:AddMessage("Cast Arcane spells to move toward a Solar eclipse!")
end

Returns sun, moon or none correctly. But after finding the GetEcpliseDirection script via IDA, there is not any clear distinction of direction around its memory / offset address.

I am sure someone has tried to do something similar.

Any suggestions or help would be appreciated.

J

[Xelper]

Looks like it is calling CGUnit_C__HasAura to check for a spell aura, and based on if you have that aura it determines direction.
Auras:
http://www.wowhead.com/spell=67483
http://www.wowhead.com/spell=67484

IDA Pseudocode:

void *__cdecl Script_GetEclipseDirection(int a1)
{
  void *result; // eax@1
  __int64 v2; // qax@1


  v2 = ClntObjMgrGetActivePlayer();
  result = ClntObjMgrObjectPtr(v2, TYPEMASK_PLAYER);
  if ( result )
  {
    if ( (unsigned __int8)CGUnit_C__HasAura(67483, 0, 0) )
    {
      lua_pushstring(a1, "sun");
      result = (void *)1;
    }
    else
    {
      if ( (unsigned __int8)CGUnit_C__HasAura(67484, 0, 0) )
      {
        lua_pushstring(a1, "moon");
        result = (void *)1;
      }
      else
      {
        lua_pushstring(a1, "none");
        result = (void *)1;
      }
    }
  }
  return result;
}

[Jokur]

This was my first thought as well, but it has 1 problem. We can detect which aura we have (Solar or Lunar) without issue.

But the direction of the eclipse pointer is misleading if you base it off of the aura.

Example: You finish combat and the pointer is returning from Solar (which = 100 when the pointer is all the way to the right) and heading to Lunar (which is -100).

You lose your aura around -20 to +20 but the direction of the arrow remains the same (if its heading to Lunar, you can NOT head back to Solar and vise versa).

So when you re enter combat and within the -20 to +20 on the eclipse bar, all bets are off as far as trying to determine whether to lead of with Moon or Sun spells.

Hopefully that makes sense ?

[Bananenbrot]

Did you try some logging/debugging with those auras? http://wowhead.com/spell=67483 seems to be checked for the direction. Note that this is not the actual eclipse aura. I mean, the lua API cant possibly do the wrong thing :O

[TOM_RUS]

Did you try some logging/debugging with those auras? http://wowhead.com/spell=67483 seems to be checked for the direction. Note that this is not the actual eclipse aura. I mean, the lua API cant possibly do the wrong thing :O

Blizzard uses a lot of hidden auras.

[Jokur]

Seems that without either of the auras, it is in flux (as if you just logged in and it has no direction). You can move it either way when it has not been activated yet. Once its committed to one side or the other, you will either have one or the other aura (until you log out).

Thanks guys, this made a ton of sense;

J

EDIT - And to Tom's point, Yeah.. Tons..



Thanks again for the help.