enumerate gltf materials in rust

To enumerate the materials in a glTF file in Rust, you can use the gltf crate, which provides a convenient way to load and manipulate glTF files.

Here's an example code snippet that demonstrates how to enumerate the materials in a glTF file using the gltf crate:

main.rs
use gltf::Gltf;

// Load the glTF file
let gltf = Gltf::open("path/to/gltf/file.gltf").unwrap();

// Enumerate the materials in the glTF file
for material in gltf.materials() {
    println!("Material: {}", material.name().unwrap_or("<unnamed>"));
}
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In this code snippet, we load the glTF file using the Gltf::open method, which returns a Result containing a Gltf struct if the file is successfully loaded. Then, we enumerate the materials in the glTF file using the gltf::iter::Materials iterator, which allows us to iterate over the materials in the file.

For each material, we print its name using the material.name() method. Note that some materials may not have names, so we use the unwrap_or method to provide a default name ("<unnamed>") if the material's name is None.

Overall, using the gltf crate makes it relatively easy to load and work with glTF files in Rust.