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

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

//! Quad renderer for screen-space quads and sprites.

/// A screen-space quad.
#[allow(dead_code)]
#[derive(Debug, Clone, Copy)]
pub struct ScreenQuad {
    pub x: f32,
    pub y: f32,
    pub width: f32,
    pub height: f32,
    pub uv_min: [f32; 2],
    pub uv_max: [f32; 2],
}

/// Quad batch state.
#[allow(dead_code)]
#[derive(Debug, Clone)]
pub struct QuadBatch {
    pub quads: Vec<ScreenQuad>,
    pub blend_enabled: bool,
}

#[allow(dead_code)]
pub fn new_screen_quad(x: f32, y: f32, width: f32, height: f32) -> ScreenQuad {
    ScreenQuad { x, y, width, height, uv_min: [0.0, 0.0], uv_max: [1.0, 1.0] }
}

#[allow(dead_code)]
pub fn fullscreen_quad() -> ScreenQuad {
    ScreenQuad { x: -1.0, y: -1.0, width: 2.0, height: 2.0, uv_min: [0.0, 0.0], uv_max: [1.0, 1.0] }
}

#[allow(dead_code)]
pub fn new_quad_batch() -> QuadBatch {
    QuadBatch { quads: Vec::new(), blend_enabled: true }
}

#[allow(dead_code)]
pub fn add_quad(batch: &mut QuadBatch, quad: ScreenQuad) {
    batch.quads.push(quad);
}

#[allow(dead_code)]
pub fn quad_count(batch: &QuadBatch) -> usize {
    batch.quads.len()
}

#[allow(dead_code)]
pub fn clear_quads(batch: &mut QuadBatch) {
    batch.quads.clear();
}

#[allow(dead_code)]
pub fn quad_area(quad: &ScreenQuad) -> f32 {
    quad.width * quad.height
}

#[allow(dead_code)]
pub fn set_quad_uv(quad: &mut ScreenQuad, u_min: f32, v_min: f32, u_max: f32, v_max: f32) {
    quad.uv_min = [u_min, v_min];
    quad.uv_max = [u_max, v_max];
}

#[allow(dead_code)]
pub fn quad_center(quad: &ScreenQuad) -> [f32; 2] {
    [quad.x + quad.width * 0.5, quad.y + quad.height * 0.5]
}

#[allow(dead_code)]
pub fn is_batch_empty(batch: &QuadBatch) -> bool {
    batch.quads.is_empty()
}

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

    #[test]
    fn test_new_screen_quad() {
        let q = new_screen_quad(0.0, 0.0, 100.0, 50.0);
        assert!((q.width - 100.0).abs() < 1e-6);
    }

    #[test]
    fn test_fullscreen_quad() {
        let q = fullscreen_quad();
        assert!((q.width - 2.0).abs() < 1e-6);
    }

    #[test]
    fn test_new_batch() {
        let b = new_quad_batch();
        assert!(is_batch_empty(&b));
    }

    #[test]
    fn test_add_quad() {
        let mut b = new_quad_batch();
        add_quad(&mut b, new_screen_quad(0.0, 0.0, 10.0, 10.0));
        assert_eq!(quad_count(&b), 1);
    }

    #[test]
    fn test_clear_quads() {
        let mut b = new_quad_batch();
        add_quad(&mut b, new_screen_quad(0.0, 0.0, 10.0, 10.0));
        clear_quads(&mut b);
        assert!(is_batch_empty(&b));
    }

    #[test]
    fn test_quad_area() {
        let q = new_screen_quad(0.0, 0.0, 10.0, 20.0);
        assert!((quad_area(&q) - 200.0).abs() < 1e-6);
    }

    #[test]
    fn test_set_quad_uv() {
        let mut q = new_screen_quad(0.0, 0.0, 10.0, 10.0);
        set_quad_uv(&mut q, 0.25, 0.25, 0.75, 0.75);
        assert!((q.uv_min[0] - 0.25).abs() < 1e-6);
    }

    #[test]
    fn test_quad_center() {
        let q = new_screen_quad(10.0, 20.0, 100.0, 50.0);
        let c = quad_center(&q);
        assert!((c[0] - 60.0).abs() < 1e-6);
        assert!((c[1] - 45.0).abs() < 1e-6);
    }

    #[test]
    fn test_multiple_quads() {
        let mut b = new_quad_batch();
        add_quad(&mut b, new_screen_quad(0.0, 0.0, 10.0, 10.0));
        add_quad(&mut b, new_screen_quad(20.0, 20.0, 10.0, 10.0));
        assert_eq!(quad_count(&b), 2);
    }

    #[test]
    fn test_blend_enabled_default() {
        let b = new_quad_batch();
        assert!(b.blend_enabled);
    }
}