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Unlucky-Launcher/crates/design/tests/card_neutral/common.rs
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Unlucky Launcher v0.2.1
2026-11-06 20:47:19 +08:00

28 lines
1.1 KiB
Rust

//! `card_neutral` 测试组共用的帮手:改前路径的复原、模式列表、色相环距离。
//!
//! 拆成子模块是为了单文件 ≤400 行的纪律(`card_neutral.rs` 是 crate 根,`common` / `dump`
//! 只是它的子模块;cargo 只把 `tests/card_neutral.rs` 当一个 test target)。
use unlucky_design::color::{Palettes, Scheme, SchemeFlavor};
use unlucky_design::palette::Card;
/// 改前的路径(M87 及之前):中性调色板跟着种子染色(官方 TonalSpot)。
///
/// 产品代码已经不用它了,但公开 API 仍在(取色路径就靠它逐色染色),所以这里能原样复现「改前」。
pub fn before_d43(card: Card, flavor: SchemeFlavor) -> Scheme {
Scheme::from_palettes(
&Palettes::from_seed_with_neutral_chroma(card.seed, card.neutral_chroma),
flavor,
)
}
pub fn flavors() -> [SchemeFlavor; 2] {
[SchemeFlavor::Light, SchemeFlavor::Dark]
}
/// 色相环上的最短距离(度)。
pub fn hue_gap(a: f64, b: f64) -> f64 {
let raw = (a - b).abs();
raw.min(360.0 - raw)
}