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
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191

//! Neck morphology controls for character customization.

#[allow(dead_code)]
#[derive(Debug, Clone)]
pub struct NeckConfig {
    pub neck_length: f32,
    pub neck_width: f32,
    pub neck_tilt: f32,
    pub adam_apple: f32,
}

#[allow(dead_code)]
#[derive(Debug, Clone)]
pub struct NeckState {
    pub length: f32,
    pub width: f32,
    pub tilt: f32,
    pub adam_apple: f32,
    pub muscle_tone: f32,
}

#[allow(dead_code)]
#[derive(Debug, Clone)]
pub struct NeckMorphWeights {
    pub long: f32,
    pub short: f32,
    pub wide: f32,
    pub narrow: f32,
    pub tilt: f32,
    pub adam_apple: f32,
}

#[allow(dead_code)]
pub fn default_neck_config() -> NeckConfig {
    NeckConfig {
        neck_length: 0.5,
        neck_width: 0.5,
        neck_tilt: 0.0,
        adam_apple: 0.0,
    }
}

#[allow(dead_code)]
pub fn new_neck_state() -> NeckState {
    NeckState {
        length: 0.5,
        width: 0.5,
        tilt: 0.0,
        adam_apple: 0.0,
        muscle_tone: 0.3,
    }
}

#[allow(dead_code)]
pub fn set_neck_length(state: &mut NeckState, length: f32) {
    state.length = length.clamp(0.0, 1.0);
}

#[allow(dead_code)]
pub fn set_neck_width(state: &mut NeckState, width: f32) {
    state.width = width.clamp(0.0, 1.0);
}

#[allow(dead_code)]
pub fn set_neck_tilt(state: &mut NeckState, tilt: f32) {
    state.tilt = tilt.clamp(-1.0, 1.0);
}

#[allow(dead_code)]
pub fn set_adam_apple(state: &mut NeckState, amount: f32) {
    state.adam_apple = amount.clamp(0.0, 1.0);
}

#[allow(dead_code)]
pub fn compute_neck_weights(state: &NeckState, cfg: &NeckConfig) -> NeckMorphWeights {
    let len_bias = cfg.neck_length;
    let wid_bias = cfg.neck_width;
    let long = (state.length * len_bias).clamp(0.0, 1.0);
    let short = ((1.0 - state.length) * len_bias).clamp(0.0, 1.0);
    let wide = (state.width * wid_bias).clamp(0.0, 1.0);
    let narrow = ((1.0 - state.width) * wid_bias).clamp(0.0, 1.0);
    let tilt = (state.tilt.abs() * cfg.neck_tilt.abs().max(state.tilt.abs())).clamp(0.0, 1.0);
    let adam_apple = (state.adam_apple * (cfg.adam_apple + 0.001)).clamp(0.0, 1.0);
    NeckMorphWeights { long, short, wide, narrow, tilt, adam_apple }
}

#[allow(dead_code)]
pub fn blend_neck(a: &NeckState, b: &NeckState, t: f32) -> NeckState {
    let t = t.clamp(0.0, 1.0);
    let u = 1.0 - t;
    NeckState {
        length: a.length * u + b.length * t,
        width: a.width * u + b.width * t,
        tilt: a.tilt * u + b.tilt * t,
        adam_apple: a.adam_apple * u + b.adam_apple * t,
        muscle_tone: a.muscle_tone * u + b.muscle_tone * t,
    }
}

#[allow(dead_code)]
pub fn reset_neck(state: &mut NeckState) {
    *state = new_neck_state();
}

#[allow(dead_code)]
pub fn neck_state_to_json(state: &NeckState) -> String {
    format!(
        r#"{{"length":{:.4},"width":{:.4},"tilt":{:.4},"adam_apple":{:.4},"muscle_tone":{:.4}}}"#,
        state.length, state.width, state.tilt, state.adam_apple, state.muscle_tone
    )
}

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

    #[test]
    fn test_default_neck_config() {
        let cfg = default_neck_config();
        assert!((cfg.neck_length - 0.5).abs() < 1e-6);
        assert!(cfg.adam_apple.abs() < 1e-6);
    }

    #[test]
    fn test_new_neck_state() {
        let s = new_neck_state();
        assert!((s.length - 0.5).abs() < 1e-6);
        assert!(s.tilt.abs() < 1e-6);
    }

    #[test]
    fn test_set_neck_length_clamp() {
        let mut s = new_neck_state();
        set_neck_length(&mut s, 2.5);
        assert!((s.length - 1.0).abs() < 1e-6);
        set_neck_length(&mut s, -0.5);
        assert!(s.length.abs() < 1e-6);
    }

    #[test]
    fn test_set_neck_tilt_clamp() {
        let mut s = new_neck_state();
        set_neck_tilt(&mut s, -5.0);
        assert!((s.tilt + 1.0).abs() < 1e-6);
        set_neck_tilt(&mut s, 5.0);
        assert!((s.tilt - 1.0).abs() < 1e-6);
    }

    #[test]
    fn test_set_adam_apple() {
        let mut s = new_neck_state();
        set_adam_apple(&mut s, 0.6);
        assert!((s.adam_apple - 0.6).abs() < 1e-6);
    }

    #[test]
    fn test_blend_neck_midpoint() {
        let a = new_neck_state();
        let mut b = new_neck_state();
        b.length = 1.0;
        let mid = blend_neck(&a, &b, 0.5);
        assert!((mid.length - 0.75).abs() < 1e-5);
    }

    #[test]
    fn test_reset_neck() {
        let mut s = new_neck_state();
        s.adam_apple = 1.0;
        s.width = 0.9;
        reset_neck(&mut s);
        assert!(s.adam_apple.abs() < 1e-6);
        assert!((s.width - 0.5).abs() < 1e-6);
    }

    #[test]
    fn test_neck_state_to_json() {
        let s = new_neck_state();
        let j = neck_state_to_json(&s);
        assert!(j.contains("length"));
        assert!(j.contains("muscle_tone"));
    }

    #[test]
    fn test_compute_neck_weights() {
        let s = new_neck_state();
        let cfg = default_neck_config();
        let w = compute_neck_weights(&s, &cfg);
        assert!(w.long >= 0.0 && w.long <= 1.0);
        assert!(w.wide >= 0.0 && w.wide <= 1.0);
    }
}