rosu-pp 4.0.1

Difficulty and performance calculation for osu!
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120

use std::cmp;

use crate::{
    Difficulty,
    any::{HitResultPriority, InspectablePerformance},
    osu::{Osu, OsuDifficultyAttributes, OsuScoreOrigin},
};

/// Inspectable [`OsuPerformance`] to expose all of its internal details.
///
/// [`OsuPerformance`]: crate::osu::performance::OsuPerformance
#[derive(Clone, Debug)]
pub struct InspectOsuPerformance<'a> {
    pub attrs: &'a OsuDifficultyAttributes,
    pub difficulty: &'a Difficulty,
    pub acc: Option<f64>,
    pub combo: Option<u32>,
    pub large_tick_hits: Option<u32>,
    pub small_tick_hits: Option<u32>,
    pub slider_end_hits: Option<u32>,
    pub n300: Option<u32>,
    pub n100: Option<u32>,
    pub n50: Option<u32>,
    pub misses: Option<u32>,
    pub hitresult_priority: HitResultPriority,
}

impl InspectOsuPerformance<'_> {
    pub fn total_hits(&self) -> u32 {
        cmp::min(
            self.difficulty.get_passed_objects() as u32,
            self.attrs.n_objects(),
        )
    }

    pub fn misses(&self) -> u32 {
        self.misses.map_or(0, |n| cmp::min(n, self.total_hits()))
    }

    pub fn lazer(&self) -> bool {
        self.difficulty.get_lazer()
    }

    pub fn using_classic_slider_acc(&self) -> bool {
        self.difficulty.get_mods().no_slider_head_acc(self.lazer())
    }

    pub fn origin(&self) -> OsuScoreOrigin {
        match (self.lazer(), self.using_classic_slider_acc()) {
            (false, _) => OsuScoreOrigin::Stable,
            (true, false) => OsuScoreOrigin::WithSliderAcc {
                max_large_ticks: self.attrs.n_large_ticks,
                max_slider_ends: self.attrs.n_sliders,
            },
            (true, true) => OsuScoreOrigin::WithoutSliderAcc {
                max_large_ticks: self.attrs.n_sliders + self.attrs.n_large_ticks,
                max_small_ticks: self.attrs.n_sliders,
            },
        }
    }

    /// Returns the number of slider end hits, large tick hits, and small tick
    /// hits.
    pub fn tick_hits(&self) -> (u32, u32, u32) {
        let lazer = self.lazer();
        let using_classic_slider_acc = self.using_classic_slider_acc();

        match (lazer, using_classic_slider_acc) {
            (false, _) => (0, 0, 0),
            (true, false) => {
                let slider_end_hits = self
                    .slider_end_hits
                    .map_or(self.attrs.n_sliders, |n| cmp::min(n, self.attrs.n_sliders));

                let large_tick_hits = self.large_tick_hits.map_or(self.attrs.n_large_ticks, |n| {
                    cmp::min(n, self.attrs.n_large_ticks)
                });

                (slider_end_hits, large_tick_hits, 0)
            }
            (true, true) => {
                let small_tick_hits = self
                    .small_tick_hits
                    .map_or(self.attrs.n_sliders, |n| cmp::min(n, self.attrs.n_sliders));

                let large_tick_hits = self
                    .large_tick_hits
                    .map_or(self.attrs.n_sliders + self.attrs.n_large_ticks, |n| {
                        cmp::min(n, self.attrs.n_sliders + self.attrs.n_large_ticks)
                    });

                (0, large_tick_hits, small_tick_hits)
            }
        }
    }
}

impl InspectablePerformance for Osu {
    type InspectPerformance<'a> = InspectOsuPerformance<'a>;

    fn inspect_performance<'a>(
        perf: &'a Self::Performance<'_>,
        attrs: &'a Self::DifficultyAttributes,
    ) -> Self::InspectPerformance<'a> {
        InspectOsuPerformance {
            attrs,
            difficulty: &perf.difficulty,
            acc: perf.acc,
            combo: perf.combo,
            large_tick_hits: perf.large_tick_hits,
            small_tick_hits: perf.small_tick_hits,
            slider_end_hits: perf.slider_end_hits,
            n300: perf.n300,
            n100: perf.n100,
            n50: perf.n50,
            misses: perf.misses,
            hitresult_priority: perf.hitresult_priority,
        }
    }
}