oxihuman-morph 0.1.2

Parametric morphology engine for human body generation — targets, blendshapes, FACS
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
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140

// Copyright (C) 2026 COOLJAPAN OU (Team KitaSan)
// SPDX-License-Identifier: Apache-2.0
#![allow(dead_code)]

//! Femur length/angle morph — controls thigh bone proportions and neck angle.

/// Femur morph configuration.
#[derive(Debug, Clone)]
pub struct FemurMorph {
    pub length: f32,
    pub neck_angle: f32,
    pub anteversion: f32,
    pub condyle_width: f32,
}

impl FemurMorph {
    pub fn new() -> Self {
        Self {
            length: 0.5,
            neck_angle: 0.5,
            anteversion: 0.5,
            condyle_width: 0.5,
        }
    }
}

impl Default for FemurMorph {
    fn default() -> Self {
        Self::new()
    }
}

/// Create a new femur morph.
pub fn new_femur_morph() -> FemurMorph {
    FemurMorph::new()
}

/// Set femur length (relative to lower limb).
pub fn fem_set_length(m: &mut FemurMorph, v: f32) {
    m.length = v.clamp(0.0, 1.0);
}

/// Set neck-shaft angle (0 = varus, 0.5 = neutral ~130°, 1 = valgus).
pub fn fem_set_neck_angle(m: &mut FemurMorph, v: f32) {
    m.neck_angle = v.clamp(0.0, 1.0);
}

/// Set femoral anteversion (forward torsion of neck, 0 = retroversion, 1 = max anteversion).
pub fn fem_set_anteversion(m: &mut FemurMorph, v: f32) {
    m.anteversion = v.clamp(0.0, 1.0);
}

/// Set medial/lateral condyle width.
pub fn fem_set_condyle_width(m: &mut FemurMorph, v: f32) {
    m.condyle_width = v.clamp(0.0, 1.0);
}

/// Knee Q-angle contribution from neck and anteversion.
pub fn fem_q_angle(m: &FemurMorph) -> f32 {
    (m.neck_angle * 0.6 + m.anteversion * 0.4).clamp(0.0, 1.0)
}

/// Serialize to JSON-like string.
pub fn femur_morph_to_json(m: &FemurMorph) -> String {
    format!(
        r#"{{"length":{:.4},"neck_angle":{:.4},"anteversion":{:.4},"condyle_width":{:.4}}}"#,
        m.length, m.neck_angle, m.anteversion, m.condyle_width
    )
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_defaults() {
        let m = new_femur_morph();
        assert!((m.length - 0.5).abs() < 1e-6);
        assert!((m.neck_angle - 0.5).abs() < 1e-6);
    }

    #[test]
    fn test_length_clamp() {
        let mut m = new_femur_morph();
        fem_set_length(&mut m, 3.0);
        assert_eq!(m.length, 1.0);
    }

    #[test]
    fn test_neck_angle_clamp() {
        let mut m = new_femur_morph();
        fem_set_neck_angle(&mut m, -0.5);
        assert_eq!(m.neck_angle, 0.0);
    }

    #[test]
    fn test_anteversion_set() {
        let mut m = new_femur_morph();
        fem_set_anteversion(&mut m, 0.8);
        assert!((m.anteversion - 0.8).abs() < 1e-6);
    }

    #[test]
    fn test_condyle_set() {
        let mut m = new_femur_morph();
        fem_set_condyle_width(&mut m, 0.7);
        assert!((m.condyle_width - 0.7).abs() < 1e-6);
    }

    #[test]
    fn test_q_angle_range() {
        let m = new_femur_morph();
        let q = fem_q_angle(&m);
        assert!((0.0..=1.0).contains(&q));
    }

    #[test]
    fn test_q_angle_increases() {
        let mut m = new_femur_morph();
        let q0 = fem_q_angle(&m);
        fem_set_neck_angle(&mut m, 1.0);
        fem_set_anteversion(&mut m, 1.0);
        let q1 = fem_q_angle(&m);
        assert!(q1 > q0);
    }

    #[test]
    fn test_json_keys() {
        let m = new_femur_morph();
        let s = femur_morph_to_json(&m);
        assert!(s.contains("anteversion"));
    }

    #[test]
    fn test_clone() {
        let m = new_femur_morph();
        let m2 = m.clone();
        assert!((m2.condyle_width - m.condyle_width).abs() < 1e-6);
    }
}