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fix(obj): assign correct type to textures that have already been loaded. implement .mtl transparency keyword

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Illusion
2023-11-05 01:03:20 +02:00
parent 8decddbf14
commit b5430822c6
2 changed files with 13 additions and 3 deletions
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src/importer/obj.rs
+12 -3
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@@ -48,6 +48,7 @@ enum MtlToken {
SpecularExponent,
Refraction,
Opacity,
Transparency,
AmbientTexture,
DiffuseTexture,
SpecularTexture,
@@ -70,6 +71,7 @@ impl MtlToken {
"Ns" => Some(MtlToken::SpecularExponent),
"Ni" => Some(MtlToken::Refraction),
"d" => Some(MtlToken::Opacity),
"Tr" => Some(MtlToken::Transparency),
"map_Ka" => Some(MtlToken::AmbientTexture),
"map_Kd" => Some(MtlToken::DiffuseTexture),
"map_Ks" => Some(MtlToken::SpecularTexture),
@@ -142,6 +144,10 @@ fn parse_mtl(path: &PathBuf, obj_textures: &mut HashMap<String, Texture>) -> Res
Some(MtlToken::Opacity) => {
opacity = iter.next().unwrap().parse::<f32>().unwrap();
}
Some(MtlToken::Transparency) => {
// it's just opposite of opacity so we subtract it from 1.0
opacity = 1.0 - iter.next().unwrap().parse::<f32>().unwrap();
}
Some(MtlToken::DiffuseTexture)
| Some(MtlToken::AmbientTexture)
| Some(MtlToken::SpecularTexture)
@@ -149,8 +155,11 @@ fn parse_mtl(path: &PathBuf, obj_textures: &mut HashMap<String, Texture>) -> Res
let tex_type = TextureType::from_material_str(token).unwrap();
let name = iter.next().unwrap().to_string();
let mat = if obj_textures.contains_key(&name) {
obj_textures.get(&name).unwrap().clone()
let tex = if obj_textures.contains_key(&name) {
let mut tex = obj_textures.get(&name).unwrap().clone();
tex.typ = tex_type;
tex
} else {
let path = path.parent().unwrap().join(&name);
let tex = match Texture::new(path, tex_type) {
@@ -165,7 +174,7 @@ fn parse_mtl(path: &PathBuf, obj_textures: &mut HashMap<String, Texture>) -> Res
tex
};
mat_textures.push(mat);
mat_textures.push(tex);
}
_ => { warn!("Unhandled material token: {}", token) },
}