ERA / WOG - сетевая игра и проблемы с ней

Berserker Offline

Posts: 16624

Post: #206

ZVS, в сборке, что daemon_n ещё не довыпустил, должно уже быть последнее обновление Эры на сетевую игру. Мы один раз потестировали её с Димой, уже гораздо стабильнее всё работает и эмуляция случайности лучше.

Code:

[+] Rewrote game random number generator (RNG) engine.

  Main changes:

  - All RNGs are not thread safe now. They should be used in the main thread only.

  - There are two main RNGs: the global one (rand/srand/VR:R) and the unique one (VR:T).

  - ERA uses 3 different engines for the global RNG and switches them dynamically to provide qualitative outputs, the same battle obstacles, as they are in original Heroes 3, and network PvP battles stability.

  - VR:T generator cannot be seeded anymore. It serves as the source of unpredictable randomness.

  - At the start of game process, all generators are seeded with cryptographically safe random seeds.

  - Most of the time Xoroshiro128** engine is used for global RNG. It has both excellent speed and qualitative output.

  - The global generator engine is switched to native C rand implementation only for the phase of placing battle obstacles.

  - In network PvP battles the global generator is switched to deterministic one. Deterministic generator uses only the following information: unique battle ID, combat round ID, combat action ID, minimum and maximum value to generate. Thus any attempt to generate a sequence of numbers in the same range will produce the same result for each generation. It's recommended to replace dwarf-style resistence mechanics with golem-style resistence mechanics.

  - Global RNG is seeded with unique value at battle start/replay, thus the first action and autocasted spells are not deterministic anymore.

  - Using random functions in before battle and before battlefield visible phases does not influence battle obstacles placing anymore.

  - Extended "Debug.Rng" setting in "heroes 3.ini". 0 means no debugging, 1 is for seeding, 2 is for seeding and random_range, 3 enables debugging of all rand/srand/random_range calls.

  - rand() is guaranteed to return 0..32767 value, as it does in original Heroes 3. But random_range (VR:R/VR:T) call can return any value in int32 range (-2147483648..2147483647).

  - ERA intercepts all rand/srand calls. Previously a few functions were not tracked.

  - Deterministic RNG for network PvP battles is enabled for the whole battle (excluding obstacles placing stage). Bad morale probability and magic resistence additionaly depend on stack ID, thus producing different results for different stacks. Stack damage calculation additionally depends on iteration counter (game generates up to 10 random values for each stack damage event).

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15.06.2022 03:46

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