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
use gltf::json;
use json::validation::Checked::Valid;
use serde::Deserialize;
#[derive(Copy, Clone, Debug, PartialEq, Deserialize)]
#[serde(untagged)]
pub enum TextureRef {
Some { index: u32, texcoord: u32 },
None,
}
impl TextureRef {
fn into_option(self) -> Option<(u32, u32)> {
self.into()
}
}
impl From<TextureRef> for Option<(u32, u32)> {
fn from(tr: TextureRef) -> Option<(u32, u32)> {
match tr {
TextureRef::Some { index, texcoord } => Some((index, texcoord)),
TextureRef::None => None,
}
}
}
impl Default for TextureRef {
fn default() -> Self {
TextureRef::None
}
}
fn default_base_color() -> [f32; 4] {
[0.5, 0.5, 0.5, 1.0]
}
fn default_metallic() -> f32 {
0.0
}
fn default_roughness() -> f32 {
0.5
}
#[derive(Clone, Debug, PartialEq, Deserialize)]
pub struct MaterialInfo {
#[serde(default)]
pub name: String,
#[serde(default = "default_base_color")]
pub base_color: [f32; 4],
#[serde(default)]
pub base_texture: TextureRef,
#[serde(default = "default_metallic")]
pub metallic: f32,
#[serde(default = "default_roughness")]
pub roughness: f32,
}
impl Default for MaterialInfo {
fn default() -> Self {
MaterialInfo {
name: "Default".to_owned(),
base_color: default_base_color(),
base_texture: TextureRef::None,
metallic: default_metallic(),
roughness: default_roughness(),
}
}
}
impl std::str::FromStr for MaterialInfo {
type Err = ron::de::Error;
fn from_str(input: &str) -> Result<MaterialInfo, Self::Err> {
ron::de::from_str::<MaterialInfo>(input)
}
}
impl From<MaterialInfo> for json::Material {
fn from(mi: MaterialInfo) -> json::Material {
let MaterialInfo {
name,
base_color,
base_texture,
metallic,
roughness,
} = mi;
json::Material {
name: if name.is_empty() { None } else { Some(name) },
alpha_cutoff: None,
alpha_mode: Valid(json::material::AlphaMode::Opaque),
double_sided: false,
pbr_metallic_roughness: json::material::PbrMetallicRoughness {
base_color_factor: json::material::PbrBaseColorFactor(base_color),
base_color_texture: base_texture.into_option().map(|(index, texcoord)| {
json::texture::Info {
index: json::Index::new(index),
tex_coord: texcoord,
extensions: Default::default(),
extras: Default::default(),
}
}),
metallic_factor: json::material::StrengthFactor(metallic),
roughness_factor: json::material::StrengthFactor(roughness),
metallic_roughness_texture: None,
extensions: Default::default(),
extras: Default::default(),
},
normal_texture: None,
occlusion_texture: None,
emissive_texture: None,
emissive_factor: json::material::EmissiveFactor([0.0, 0.0, 0.0]),
extensions: Default::default(),
extras: Default::default(),
}
}
}