oxihuman-viewer 0.2.1

wgpu/WebGPU rendering adapter for OxiHuman
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

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

//! Indirect lighting and global illumination approximation.

use std::f32::consts::PI;

/// Configuration for indirect light.
#[allow(dead_code)]
#[derive(Debug, Clone)]
pub struct IndirectLightConfig {
    pub bounce_intensity: f32,
    pub falloff: f32,
    pub max_distance: f32,
    pub color_bleed: f32,
    pub quality: f32,
}

#[allow(dead_code)]
pub fn default_indirect_light() -> IndirectLightConfig {
    IndirectLightConfig { bounce_intensity: 0.5, falloff: 2.0, max_distance: 10.0, color_bleed: 0.3, quality: 0.5 }
}

#[allow(dead_code)]
pub fn set_indirect_light_bounce_intensity(cfg: &mut IndirectLightConfig, value: f32) {
    cfg.bounce_intensity = value.clamp(0.0_f32, 1.0_f32);
}

#[allow(dead_code)]
pub fn set_indirect_light_falloff(cfg: &mut IndirectLightConfig, value: f32) {
    cfg.falloff = value.clamp(0.1_f32, 10.0_f32);
}

#[allow(dead_code)]
pub fn set_indirect_light_max_distance(cfg: &mut IndirectLightConfig, value: f32) {
    cfg.max_distance = value.clamp(0.1_f32, 10000.0_f32);
}

#[allow(dead_code)]
pub fn set_indirect_light_color_bleed(cfg: &mut IndirectLightConfig, value: f32) {
    cfg.color_bleed = value.clamp(0.0_f32, 1.0_f32);
}

#[allow(dead_code)]
pub fn set_indirect_light_quality(cfg: &mut IndirectLightConfig, value: f32) {
    cfg.quality = value.clamp(0.0_f32, 1.0_f32);
}

#[allow(dead_code)]
pub fn indirect_light_weight(cfg: &IndirectLightConfig) -> f32 {
    (cfg.bounce_intensity * (PI * 0.25).sin()).clamp(0.0, 1.0)
}

#[allow(dead_code)]
pub fn blend_indirect_light(a: &IndirectLightConfig, b: &IndirectLightConfig, t: f32) -> IndirectLightConfig {
    let t = t.clamp(0.0, 1.0);
    IndirectLightConfig {
        bounce_intensity: a.bounce_intensity + (b.bounce_intensity - a.bounce_intensity) * t,
        falloff: a.falloff + (b.falloff - a.falloff) * t,
        max_distance: a.max_distance + (b.max_distance - a.max_distance) * t,
        color_bleed: a.color_bleed + (b.color_bleed - a.color_bleed) * t,
        quality: a.quality + (b.quality - a.quality) * t,
    }
}

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

    #[test]
    fn test_default() {
        let cfg = default_indirect_light();
        assert!((cfg.bounce_intensity - 0.5_f32).abs() < 1e-3);
    }

    #[test]
    fn test_set_bounce_intensity() {
        let mut cfg = default_indirect_light();
        set_indirect_light_bounce_intensity(&mut cfg, 0.7);
        assert!((cfg.bounce_intensity - 0.7).abs() < 1e-6);
    }

    #[test]
    fn test_set_falloff() {
        let mut cfg = default_indirect_light();
        set_indirect_light_falloff(&mut cfg, 0.8);
        assert!((cfg.falloff - 0.8).abs() < 1e-6);
    }

    #[test]
    fn test_set_max_distance() {
        let mut cfg = default_indirect_light();
        set_indirect_light_max_distance(&mut cfg, 0.6);
        assert!((cfg.max_distance - 0.6).abs() < 1e-6);
    }

    #[test]
    fn test_set_color_bleed() {
        let mut cfg = default_indirect_light();
        set_indirect_light_color_bleed(&mut cfg, 0.5);
        assert!((cfg.color_bleed - 0.5).abs() < 1e-6);
    }

    #[test]
    fn test_set_quality() {
        let mut cfg = default_indirect_light();
        set_indirect_light_quality(&mut cfg, 0.4);
        assert!((cfg.quality - 0.4).abs() < 1e-6);
    }

    #[test]
    fn test_weight() {
        let cfg = default_indirect_light();
        let w = indirect_light_weight(&cfg);
        assert!((0.0..=1.0).contains(&w));
    }

    #[test]
    fn test_blend() {
        let a = default_indirect_light();
        let mut b = default_indirect_light();
        b.bounce_intensity = 1.0;
        let mid = blend_indirect_light(&a, &b, 0.5);
        assert!((mid.bounce_intensity - 0.75_f32).abs() < 1e-3);
    }

    #[test]
    fn test_blend_zero() {
        let a = default_indirect_light();
        let b = default_indirect_light();
        let r = blend_indirect_light(&a, &b, 0.0);
        assert!((r.bounce_intensity - a.bounce_intensity).abs() < 1e-6);
    }

    #[test]
    fn test_blend_one() {
        let a = default_indirect_light();
        let b = default_indirect_light();
        let r = blend_indirect_light(&a, &b, 1.0);
        assert!((r.bounce_intensity - b.bounce_intensity).abs() < 1e-6);
    }

    #[test]
    fn test_blend_clamp() {
        let a = default_indirect_light();
        let b = default_indirect_light();
        let r = blend_indirect_light(&a, &b, 2.0);
        assert!((r.bounce_intensity - b.bounce_intensity).abs() < 1e-6);
    }
}