//! File import loaders — each behind a feature flag.
//!
//! | Feature | Function | Format |
//!|---------|----------|--------|
//!| `import-obj` | `load_obj(path)` | Wavefront OBJ |
//!| `import-gltf` | `load_gltf(path)` | glTF 2.0 / GLB |

#[cfg(feature = "import-obj")]
pub mod obj;
#[cfg(feature = "import-gltf")]
#[path = "gltf.rs"]
pub mod gltf_loader;

#[cfg(feature = "import-obj")]
pub use obj::{load_obj, parse_obj};
#[cfg(feature = "import-gltf")]
pub use gltf_loader::load_gltf;

/// Error type for mesh file import.
#[derive(thiserror::Error, Debug)]
pub enum MeshImportError {
    /// The file could not be read (I/O error).
    #[error("IO error: {0}")]
    Io(#[from] std::io::Error),
    /// The file content is malformed or cannot be parsed.
    #[error("parse error: {0}")]
    Parse(String),
    /// The file uses features not supported by this loader.
    #[error("unsupported format: {0}")]
    Unsupported(String),
}