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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174

// Copyright (C) 2026 COOLJAPAN OU (Team KitaSan)
// SPDX-License-Identifier: Apache-2.0

//! GPU instanced rendering state.

#![allow(dead_code)]

/// Configuration for instanced rendering.
#[allow(dead_code)]
#[derive(Debug, Clone)]
pub struct InstancedConfig {
    pub max_instances: usize,
    pub dynamic: bool,
}

/// Per-instance data for the GPU.
#[allow(dead_code)]
#[derive(Debug, Clone)]
pub struct InstanceData {
    pub transform: [f32; 16],
    pub color: [f32; 4],
}

/// Instanced renderer state.
#[allow(dead_code)]
#[derive(Debug, Clone)]
pub struct InstancedRenderer {
    pub mesh_id: u32,
    pub instances: Vec<InstanceData>,
    pub config: InstancedConfig,
}

#[allow(dead_code)]
pub fn default_instanced_config() -> InstancedConfig {
    InstancedConfig {
        max_instances: 1024,
        dynamic: true,
    }
}

#[allow(dead_code)]
pub fn new_instanced_renderer(mesh_id: u32) -> InstancedRenderer {
    InstancedRenderer {
        mesh_id,
        instances: Vec::new(),
        config: default_instanced_config(),
    }
}

#[allow(dead_code)]
pub fn ir_add_instance(renderer: &mut InstancedRenderer, data: InstanceData) -> bool {
    if renderer.instances.len() >= renderer.config.max_instances {
        return false;
    }
    renderer.instances.push(data);
    true
}

#[allow(dead_code)]
pub fn ir_remove_instance(renderer: &mut InstancedRenderer, index: usize) -> bool {
    if index >= renderer.instances.len() {
        return false;
    }
    renderer.instances.remove(index);
    true
}

#[allow(dead_code)]
pub fn ir_instance_count(renderer: &InstancedRenderer) -> usize {
    renderer.instances.len()
}

#[allow(dead_code)]
pub fn ir_clear(renderer: &mut InstancedRenderer) {
    renderer.instances.clear();
}

#[allow(dead_code)]
pub fn ir_get_instance(renderer: &InstancedRenderer, index: usize) -> Option<&InstanceData> {
    renderer.instances.get(index)
}

#[allow(dead_code)]
pub fn ir_to_json(renderer: &InstancedRenderer) -> String {
    format!(
        r#"{{"mesh_id":{},"instance_count":{}}}"#,
        renderer.mesh_id,
        renderer.instances.len()
    )
}

#[allow(dead_code)]
pub fn ir_is_full(renderer: &InstancedRenderer) -> bool {
    renderer.instances.len() >= renderer.config.max_instances
}

fn identity_transform() -> [f32; 16] {
    [
        1.0, 0.0, 0.0, 0.0,
        0.0, 1.0, 0.0, 0.0,
        0.0, 0.0, 1.0, 0.0,
        0.0, 0.0, 0.0, 1.0,
    ]
}

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

    #[test]
    fn test_default_config() {
        let cfg = default_instanced_config();
        assert_eq!(cfg.max_instances, 1024);
        assert!(cfg.dynamic);
    }

    #[test]
    fn test_new_renderer_empty() {
        let r = new_instanced_renderer(1);
        assert_eq!(r.mesh_id, 1);
        assert_eq!(ir_instance_count(&r), 0);
    }

    #[test]
    fn test_add_instance() {
        let mut r = new_instanced_renderer(1);
        let d = InstanceData { transform: identity_transform(), color: [1.0; 4] };
        assert!(ir_add_instance(&mut r, d));
        assert_eq!(ir_instance_count(&r), 1);
    }

    #[test]
    fn test_remove_instance() {
        let mut r = new_instanced_renderer(1);
        let d = InstanceData { transform: identity_transform(), color: [1.0; 4] };
        ir_add_instance(&mut r, d);
        assert!(ir_remove_instance(&mut r, 0));
        assert_eq!(ir_instance_count(&r), 0);
    }

    #[test]
    fn test_remove_out_of_bounds() {
        let mut r = new_instanced_renderer(1);
        assert!(!ir_remove_instance(&mut r, 5));
    }

    #[test]
    fn test_clear() {
        let mut r = new_instanced_renderer(1);
        let d = InstanceData { transform: identity_transform(), color: [1.0; 4] };
        ir_add_instance(&mut r, d.clone());
        ir_add_instance(&mut r, d);
        ir_clear(&mut r);
        assert_eq!(ir_instance_count(&r), 0);
    }

    #[test]
    fn test_to_json_contains_fields() {
        let r = new_instanced_renderer(42);
        let j = ir_to_json(&r);
        assert!(j.contains("mesh_id"));
        assert!(j.contains("instance_count"));
    }

    #[test]
    fn test_is_full() {
        let mut r = new_instanced_renderer(1);
        r.config.max_instances = 1;
        let d = InstanceData { transform: identity_transform(), color: [1.0; 4] };
        ir_add_instance(&mut r, d.clone());
        assert!(ir_is_full(&r));
        assert!(!ir_add_instance(&mut r, d));
    }
}