parthia_lib/
fegame.rs

1//! This file defines an enumeration that accounts for the different ways games
2//! handle basic mechanics that can't be compartmentalized into units or
3//! weapons. For example, different games use different level-up systems,
4//! different hit rate systems, and different critical damage calculations. The
5//! hit rate systems are dealt with by the `rng` module but encapsulated here as
6//! well.
7
8use crate::rng::RNSystem;
9use strum_macros::{Display, EnumString, EnumIter};
10use serde::{Deserialize, Serialize};
11
12#[derive(Copy, Clone, Eq, PartialEq, Hash, Debug, Display, EnumString, EnumIter,
13         Deserialize, Serialize)]
14pub enum FEGame {
15    FE1,
16    FE2,
17    FE3,
18    FE4,
19    FE5,
20    FE6,
21    FE7,
22    FE8,
23    FE9,
24    FE10,
25    FE11,
26    FE12,
27    FE13,
28    FE14,
29    FE15,
30    SoV,
31}
32
33
34impl FEGame {
35    /// Converts listed hit, what the game tells you the hit rate is, to true
36    /// hit, the actual hit probability. Most of the games lie to you about
37    /// this: the full details are in the `rng` module.
38    pub fn true_hit(&self, listed_hit: u32) -> f64 {
39        match self {
40            FEGame::FE1 | FEGame::FE2 | FEGame::FE3 | FEGame::FE4 |
41             FEGame::FE5 => RNSystem::OneRN.true_hit(listed_hit),
42            FEGame::FE14 | FEGame::SoV =>
43                RNSystem::FatesRN.true_hit(listed_hit),
44            _ => RNSystem::TwoRN.true_hit(listed_hit)
45        }
46    }
47
48    /// Computes critical damage: this is done by doubling Atk in FE4 and FE5,
49    /// but done by tripling damage (Atk - Def) in the other games.
50    pub fn crit_damage(&self, atk: u32, def: u32) -> u32 {
51        match self {
52            FEGame::FE4 | FEGame::FE5 => atk * 2 - def,
53            _ => (atk - def) * 3
54        }
55    }
56}
parthia_lib/fegame.rs

parthia_lib/
fegame.rs
