oxihuman_viewer/
gi_debug_view.rs

1// Copyright (C) 2026 COOLJAPAN OU (Team KitaSan)
2// SPDX-License-Identifier: Apache-2.0
3#![allow(dead_code)]
4
5pub struct GiDebugView {
6    pub show_irradiance: bool,
7    pub show_radiance: bool,
8    pub show_probes: bool,
9    pub exposure: f32,
10}
11
12pub fn new_gi_debug_view() -> GiDebugView {
13    GiDebugView {
14        show_irradiance: true,
15        show_radiance: false,
16        show_probes: false,
17        exposure: 1.0,
18    }
19}
20
21pub fn gi_irradiance_color(irradiance: [f32; 3], exposure: f32) -> [f32; 3] {
22    [
23        (irradiance[0] * exposure).clamp(0.0, 1.0),
24        (irradiance[1] * exposure).clamp(0.0, 1.0),
25        (irradiance[2] * exposure).clamp(0.0, 1.0),
26    ]
27}
28
29pub fn gi_probe_color(probe_weight: f32) -> [f32; 3] {
30    let w = probe_weight.clamp(0.0, 1.0);
31    [w, w * 0.5, 1.0 - w]
32}
33
34pub fn gi_radiance_to_ldr(radiance: [f32; 3], exposure: f32) -> [f32; 3] {
35    /* Reinhard tone mapping */
36    [
37        (radiance[0] * exposure) / (1.0 + radiance[0] * exposure),
38        (radiance[1] * exposure) / (1.0 + radiance[1] * exposure),
39        (radiance[2] * exposure) / (1.0 + radiance[2] * exposure),
40    ]
41}
42
43pub fn gi_is_converged(variance: f32, threshold: f32) -> bool {
44    variance < threshold
45}
46
47#[cfg(test)]
48mod tests {
49    use super::*;
50
51    #[test]
52    fn test_new_gi_debug_view() {
53        /* exposure defaults to 1 */
54        let v = new_gi_debug_view();
55        assert!((v.exposure - 1.0).abs() < 1e-6);
56    }
57
58    #[test]
59    fn test_gi_irradiance_color() {
60        /* irradiance clamped to [0,1] */
61        let c = gi_irradiance_color([2.0, 0.5, 0.1], 1.0);
62        assert!((c[0] - 1.0).abs() < 1e-6);
63    }
64
65    #[test]
66    fn test_gi_probe_color() {
67        /* weight=0 -> [0,0,1] */
68        let c = gi_probe_color(0.0);
69        assert!((c[2] - 1.0).abs() < 1e-6);
70    }
71
72    #[test]
73    fn test_gi_radiance_to_ldr() {
74        /* reinhard maps high radiance below 1 */
75        let c = gi_radiance_to_ldr([100.0, 0.0, 0.0], 1.0);
76        assert!(c[0] < 1.0 && c[0] > 0.9);
77    }
78
79    #[test]
80    fn test_gi_is_converged() {
81        assert!(gi_is_converged(0.001, 0.01));
82        assert!(!gi_is_converged(0.1, 0.01));
83    }
84}
oxihuman_viewer/gi_debug_view.rs

oxihuman_viewer/
gi_debug_view.rs
