gltf_v1_json/extensions/
material.rs

1use std::fmt;
2
3use gltf_v1_derive::Validate;
4use serde::{de, ser};
5use serde_derive::{Deserialize, Serialize};
6
7use crate::validation::Checked;
8
9#[derive(Clone, Debug, PartialEq, Eq, Copy, Default)]
10pub enum Technique {
11    Blinn,
12    Phong,
13    Lambert,
14    #[default]
15    Constant,
16}
17
18impl Technique {
19    pub const VALID_TECHNIQUES: &[&str] = &["LAMBERT", "PHONG", "BLINN", "CONSTANT"];
20}
21
22impl TryFrom<&str> for Technique {
23    type Error = ();
24
25    fn try_from(value: &str) -> Result<Self, Self::Error> {
26        match value {
27            "LAMBERT" => Ok(Technique::Lambert),
28            "PHONG" => Ok(Technique::Phong),
29            "BLINN" => Ok(Technique::Blinn),
30            "CONSTANT" => Ok(Technique::Constant),
31            _ => Err(()),
32        }
33    }
34}
35
36impl From<Technique> for &str {
37    fn from(value: Technique) -> Self {
38        match value {
39            Technique::Lambert => "LAMBERT",
40            Technique::Blinn => "BLINN",
41            Technique::Phong => "PHONG",
42            Technique::Constant => "CONSTANT",
43        }
44    }
45}
46
47impl ser::Serialize for Technique {
48    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
49    where
50        S: ser::Serializer,
51    {
52        serializer.serialize_str(Into::into(*self))
53    }
54}
55impl<'de> de::Deserialize<'de> for Checked<Technique> {
56    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
57    where
58        D: de::Deserializer<'de>,
59    {
60        struct Visitor;
61        impl de::Visitor<'_> for Visitor {
62            type Value = Checked<Technique>;
63
64            fn expecting(&self, f: &mut fmt::Formatter) -> fmt::Result {
65                write!(f, "any of: {:?}", Technique::VALID_TECHNIQUES)
66            }
67
68            fn visit_str<E>(self, value: &str) -> Result<Self::Value, E>
69            where
70                E: de::Error,
71            {
72                Ok(TryInto::try_into(value)
73                    .map(Checked::Valid)
74                    .unwrap_or(Checked::Invalid))
75            }
76        }
77        deserializer.deserialize_str(Visitor)
78    }
79}
80
81fn f32vec4_is_default(value: &[f32; 4]) -> bool {
82    value[0] == 0.0 && value[1] == 0.0 && value[2] == 0.0 && value[3] == 1.0
83}
84
85fn default_f32vec4() -> [f32; 4] {
86    [0.0, 0.0, 0.0, 1.0]
87}
88
89fn f320_default() -> f32 {
90    0.0
91}
92fn f321_default() -> f32 {
93    1.0
94}
95
96#[derive(Clone, Debug, Default, Deserialize, Serialize, Validate)]
97pub struct MaterialValues {
98    #[serde(
99        skip_serializing_if = "f32vec4_is_default",
100        default = "default_f32vec4"
101    )]
102    pub ambient: [f32; 4],
103    #[serde(
104        skip_serializing_if = "f32vec4_is_default",
105        default = "default_f32vec4"
106    )]
107    pub diffuse: [f32; 4],
108    #[serde(rename = "doubleSided")]
109    pub double_sided: bool,
110    #[serde(
111        skip_serializing_if = "f32vec4_is_default",
112        default = "default_f32vec4"
113    )]
114    pub emission: [f32; 4],
115    #[serde(
116        skip_serializing_if = "f32vec4_is_default",
117        default = "default_f32vec4"
118    )]
119    pub specular: [f32; 4],
120    #[serde(default = "f320_default")]
121    pub shininess: f32,
122    #[serde(default = "f321_default")]
123    pub transparency: f32,
124    pub transparent: bool,
125}
126
127#[derive(Clone, Debug, Default, Deserialize, Serialize, Validate)]
128pub struct MaterialCommon {
129    pub technique: Checked<Technique>,
130    pub values: MaterialValues,
131}
132
133#[derive(Clone, Debug, Default, Deserialize, Serialize, Validate)]
134pub struct Material {
135    #[cfg(feature = "KHR_materials_common")]
136    #[serde(rename = "KHR_materials_common")]
137    pub khr_material_common: Option<MaterialCommon>,
138    #[cfg(feature = "extensions")]
139    #[serde(default, flatten)]
140    pub others: Map<String, Value>,
141}
gltf_v1_json/extensions/material.rs

gltf_v1_json/extensions/
material.rs
