gemath 0.1.0

Type-safe game math with type-level units/spaces, typed angles, and explicit fallible ops (plus optional geometry/collision).
Documentation 
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use proptest::test_runner::{Config, RngAlgorithm, TestRng, TestRunner};

/// Deterministic proptest runner (fixed seed).
///
/// This ensures tests are reproducible without relying on environment variables.
pub fn deterministic_runner(cases: u32) -> TestRunner {
    // Fixed seed (32 bytes). Changing this changes generated values and shrink paths.
    const SEED: [u8; 32] = [
        0x67, 0x65, 0x6d, 0x61, 0x74, 0x68, 0x2d, 0x70,
        0x72, 0x6f, 0x70, 0x74, 0x65, 0x73, 0x74, 0x2d,
        0x73, 0x65, 0x65, 0x64, 0x2d, 0x76, 0x31, 0x00,
        0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88,
    ];

    let rng = TestRng::from_seed(RngAlgorithm::ChaCha, &SEED);
    let mut cfg = Config::default();
    cfg.cases = cases;
    TestRunner::new_with_rng(cfg, rng)
}