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
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176

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

//! Brow ridge morphology control for character faces.

/// Brow ridge parameters.
#[allow(dead_code)]
#[derive(Debug, Clone)]
pub struct BrowRidgeParams {
    pub prominence: f32,
    pub width: f32,
    pub height: f32,
    pub asymmetry: f32,
}

/// Result of brow ridge evaluation.
#[allow(dead_code)]
#[derive(Debug, Clone)]
pub struct BrowRidgeResult {
    pub left_weight: f32,
    pub right_weight: f32,
    pub prominence_weight: f32,
    pub width_weight: f32,
}

/// Default brow ridge parameters.
#[allow(dead_code)]
pub fn default_brow_ridge() -> BrowRidgeParams {
    BrowRidgeParams {
        prominence: 0.5,
        width: 0.5,
        height: 0.5,
        asymmetry: 0.0,
    }
}

/// Clamp a value to morph range.
#[allow(dead_code)]
pub fn clamp_morph(v: f32) -> f32 {
    v.clamp(0.0, 1.0)
}

/// Evaluate brow ridge morph weights.
#[allow(dead_code)]
pub fn evaluate_brow_ridge(params: &BrowRidgeParams) -> BrowRidgeResult {
    let p = clamp_morph(params.prominence);
    let w = clamp_morph(params.width);
    let asym = params.asymmetry.clamp(-1.0, 1.0);
    let base = p * 0.7 + w * 0.3;
    BrowRidgeResult {
        left_weight: (base + asym * 0.5).clamp(0.0, 1.0),
        right_weight: (base - asym * 0.5).clamp(0.0, 1.0),
        prominence_weight: p,
        width_weight: w,
    }
}

/// Blend two brow ridge params.
#[allow(dead_code)]
pub fn blend_brow_ridge(a: &BrowRidgeParams, b: &BrowRidgeParams, t: f32) -> BrowRidgeParams {
    let t = t.clamp(0.0, 1.0);
    BrowRidgeParams {
        prominence: a.prominence + (b.prominence - a.prominence) * t,
        width: a.width + (b.width - a.width) * t,
        height: a.height + (b.height - a.height) * t,
        asymmetry: a.asymmetry + (b.asymmetry - a.asymmetry) * t,
    }
}

/// Set prominence and clamp.
#[allow(dead_code)]
pub fn set_prominence(params: &mut BrowRidgeParams, value: f32) {
    params.prominence = clamp_morph(value);
}

/// Set width and clamp.
#[allow(dead_code)]
pub fn set_ridge_width(params: &mut BrowRidgeParams, value: f32) {
    params.width = clamp_morph(value);
}

/// Compute combined intensity.
#[allow(dead_code)]
pub fn ridge_intensity(params: &BrowRidgeParams) -> f32 {
    (params.prominence * 0.6 + params.width * 0.4).clamp(0.0, 1.0)
}

/// Check if ridge is in valid range.
#[allow(dead_code)]
pub fn is_valid_ridge(params: &BrowRidgeParams) -> bool {
    (0.0..=1.0).contains(&params.prominence)
        && (0.0..=1.0).contains(&params.width)
        && (0.0..=1.0).contains(&params.height)
        && (-1.0..=1.0).contains(&params.asymmetry)
}

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

    #[test]
    fn test_default_brow_ridge() {
        let p = default_brow_ridge();
        assert!((p.prominence - 0.5).abs() < 1e-6);
        assert!((p.asymmetry).abs() < 1e-6);
    }

    #[test]
    fn test_clamp_morph() {
        assert!((clamp_morph(-0.5)).abs() < 1e-6);
        assert!((clamp_morph(1.5) - 1.0).abs() < 1e-6);
    }

    #[test]
    fn test_evaluate_brow_ridge() {
        let p = default_brow_ridge();
        let r = evaluate_brow_ridge(&p);
        assert!((0.0..=1.0).contains(&r.left_weight));
        assert!((0.0..=1.0).contains(&r.right_weight));
    }

    #[test]
    fn test_blend_brow_ridge() {
        let a = default_brow_ridge();
        let mut b = default_brow_ridge();
        b.prominence = 1.0;
        let c = blend_brow_ridge(&a, &b, 0.5);
        assert!((c.prominence - 0.75).abs() < 1e-6);
    }

    #[test]
    fn test_set_prominence() {
        let mut p = default_brow_ridge();
        set_prominence(&mut p, 0.8);
        assert!((p.prominence - 0.8).abs() < 1e-6);
    }

    #[test]
    fn test_set_ridge_width() {
        let mut p = default_brow_ridge();
        set_ridge_width(&mut p, 0.3);
        assert!((p.width - 0.3).abs() < 1e-6);
    }

    #[test]
    fn test_ridge_intensity() {
        let p = default_brow_ridge();
        let v = ridge_intensity(&p);
        assert!((0.0..=1.0).contains(&v));
    }

    #[test]
    fn test_is_valid_ridge() {
        let p = default_brow_ridge();
        assert!(is_valid_ridge(&p));
    }

    #[test]
    fn test_asymmetry_effect() {
        let mut p = default_brow_ridge();
        p.asymmetry = 1.0;
        let r = evaluate_brow_ridge(&p);
        assert!(r.left_weight > r.right_weight);
    }

    #[test]
    fn test_invalid_ridge() {
        let p = BrowRidgeParams {
            prominence: 2.0,
            width: 0.5,
            height: 0.5,
            asymmetry: 0.0,
        };
        assert!(!is_valid_ridge(&p));
    }
}