https://bugs.winehq.org/show_bug.cgi?id=55903
--- Comment #1 from Stan aka Xeno xeno@x-s.com.pl --- I've talked with one of the app devs to get some hints what app is doing in this place. To quote what he said:
[...] Essentially, its a pointer trick. Lodidx comes from the object memory address - the first object in the array. its pointer arithmetics, something which is not recommended, but works.
const int lodIdx = static_cast<int>(this - TheObjectLODs);
Theobjectlods is an array of objects. So we take our address and subtract from the array. This should give us our index.
For example, in a very simplified way, if our address is 10 and the array starts at 8, we are index 2 (because 0 is not valid).
Maybe wine changed pointer arithmetic behavior for security reasons
[...]