oxihuman_morph/
forehead_protrusion_control.rs

1// Copyright (C) 2026 COOLJAPAN OU (Team KitaSan)
2// SPDX-License-Identifier: Apache-2.0
3
4#![allow(dead_code)]
5
6//! Forehead protrusion control: adjusts frontal bossing and forehead slope.
7
8use std::f32::consts::FRAC_PI_3;
9
10#[allow(dead_code)]
11#[derive(Debug, Clone)]
12pub struct ForeheadProtrusionConfig {
13    pub min_protrusion: f32,
14    pub max_protrusion: f32,
15}
16
17#[allow(dead_code)]
18#[derive(Debug, Clone)]
19pub struct ForeheadProtrusionState {
20    pub protrusion: f32,
21    pub slope: f32,
22    pub bossing: f32,
23}
24
25#[allow(dead_code)]
26pub fn default_forehead_protrusion_config() -> ForeheadProtrusionConfig {
27    ForeheadProtrusionConfig {
28        min_protrusion: 0.0,
29        max_protrusion: 1.0,
30    }
31}
32
33#[allow(dead_code)]
34pub fn new_forehead_protrusion_state() -> ForeheadProtrusionState {
35    ForeheadProtrusionState {
36        protrusion: 0.5,
37        slope: 0.5,
38        bossing: 0.3,
39    }
40}
41
42#[allow(dead_code)]
43pub fn fp_set_protrusion(
44    state: &mut ForeheadProtrusionState,
45    cfg: &ForeheadProtrusionConfig,
46    v: f32,
47) {
48    state.protrusion = v.clamp(cfg.min_protrusion, cfg.max_protrusion);
49}
50
51#[allow(dead_code)]
52pub fn fp_set_slope(state: &mut ForeheadProtrusionState, v: f32) {
53    state.slope = v.clamp(0.0, 1.0);
54}
55
56#[allow(dead_code)]
57pub fn fp_set_bossing(state: &mut ForeheadProtrusionState, v: f32) {
58    state.bossing = v.clamp(0.0, 1.0);
59}
60
61#[allow(dead_code)]
62pub fn fp_reset(state: &mut ForeheadProtrusionState) {
63    *state = new_forehead_protrusion_state();
64}
65
66#[allow(dead_code)]
67pub fn fp_slope_angle(state: &ForeheadProtrusionState) -> f32 {
68    state.slope * FRAC_PI_3
69}
70
71#[allow(dead_code)]
72pub fn fp_to_weights(state: &ForeheadProtrusionState) -> Vec<(String, f32)> {
73    vec![
74        ("forehead_protrusion".to_string(), state.protrusion),
75        ("forehead_slope".to_string(), state.slope),
76        ("forehead_bossing".to_string(), state.bossing),
77    ]
78}
79
80#[allow(dead_code)]
81pub fn fp_to_json(state: &ForeheadProtrusionState) -> String {
82    format!(
83        r#"{{"protrusion":{:.4},"slope":{:.4},"bossing":{:.4}}}"#,
84        state.protrusion, state.slope, state.bossing
85    )
86}
87
88#[allow(dead_code)]
89pub fn fp_blend(
90    a: &ForeheadProtrusionState,
91    b: &ForeheadProtrusionState,
92    t: f32,
93) -> ForeheadProtrusionState {
94    let t = t.clamp(0.0, 1.0);
95    ForeheadProtrusionState {
96        protrusion: a.protrusion + (b.protrusion - a.protrusion) * t,
97        slope: a.slope + (b.slope - a.slope) * t,
98        bossing: a.bossing + (b.bossing - a.bossing) * t,
99    }
100}
101
102#[cfg(test)]
103mod tests {
104    use super::*;
105
106    #[test]
107    fn test_default_config() {
108        let cfg = default_forehead_protrusion_config();
109        assert!(cfg.min_protrusion.abs() < 1e-6);
110    }
111
112    #[test]
113    fn test_new_state() {
114        let s = new_forehead_protrusion_state();
115        assert!((s.protrusion - 0.5).abs() < 1e-6);
116    }
117
118    #[test]
119    fn test_set_protrusion_clamps() {
120        let cfg = default_forehead_protrusion_config();
121        let mut s = new_forehead_protrusion_state();
122        fp_set_protrusion(&mut s, &cfg, 5.0);
123        assert!((s.protrusion - 1.0).abs() < 1e-6);
124    }
125
126    #[test]
127    fn test_set_slope() {
128        let mut s = new_forehead_protrusion_state();
129        fp_set_slope(&mut s, 0.8);
130        assert!((s.slope - 0.8).abs() < 1e-6);
131    }
132
133    #[test]
134    fn test_set_bossing() {
135        let mut s = new_forehead_protrusion_state();
136        fp_set_bossing(&mut s, 0.7);
137        assert!((s.bossing - 0.7).abs() < 1e-6);
138    }
139
140    #[test]
141    fn test_reset() {
142        let cfg = default_forehead_protrusion_config();
143        let mut s = new_forehead_protrusion_state();
144        fp_set_protrusion(&mut s, &cfg, 0.9);
145        fp_reset(&mut s);
146        assert!((s.protrusion - 0.5).abs() < 1e-6);
147    }
148
149    #[test]
150    fn test_slope_angle() {
151        let mut s = new_forehead_protrusion_state();
152        s.slope = 1.0;
153        assert!((fp_slope_angle(&s) - FRAC_PI_3).abs() < 1e-6);
154    }
155
156    #[test]
157    fn test_to_weights() {
158        let s = new_forehead_protrusion_state();
159        assert_eq!(fp_to_weights(&s).len(), 3);
160    }
161
162    #[test]
163    fn test_blend() {
164        let a = new_forehead_protrusion_state();
165        let mut b = new_forehead_protrusion_state();
166        b.protrusion = 1.0;
167        let mid = fp_blend(&a, &b, 0.5);
168        assert!((mid.protrusion - 0.75).abs() < 1e-6);
169    }
170
171    #[test]
172    fn test_to_json() {
173        let s = new_forehead_protrusion_state();
174        let j = fp_to_json(&s);
175        assert!(j.contains("protrusion"));
176    }
177}
oxihuman_morph/forehead_protrusion_control.rs

oxihuman_morph/
forehead_protrusion_control.rs
