bevy_ufbx

A Bevy plugin for loading FBX files using the ufbx library.

Features

• Load FBX files directly into Bevy
• Support for meshes with multiple materials
• PBR material support with textures
• Skeletal animation with skinning
• Scene hierarchy preservation
• Support for lights and cameras
• Flexible loading options

Installation

Add to your Cargo.toml:

[dependencies]
bevy_ufbx = "0.17"
bevy = "0.17"

Versioning

The crate minor version matches Bevy's version.

Usage

Basic Setup

use bevy::prelude::*;
use bevy_ufbx::FbxPlugin;

fn main() {
    App::new()
        .add_plugins(DefaultPlugins)
        .add_plugins(FbxPlugin)
        .run();
}

Loading FBX Files

use bevy::prelude::*;
use bevy_ufbx::{Fbx, FbxAssetLabel};

fn load_fbx(
    mut commands: Commands,
    asset_server: Res<AssetServer>,
) {
    // Load the entire FBX file
    let fbx_handle = asset_server.load::<Fbx>("models/character.fbx");

    // Or load specific sub-assets with labels
    let scene = asset_server.load::<Scene>("models/character.fbx#Scene0");
    let mesh = asset_server.load::<Mesh>("models/character.fbx#Mesh0");
    let material = asset_server.load::<StandardMaterial>("models/character.fbx#Material0");

    // Spawn the scene
    commands.spawn(SceneRoot(scene));
}

Custom Loading Settings

use bevy::prelude::*;
use bevy_ufbx::FbxLoaderSettings;

fn load_with_settings(asset_server: Res<AssetServer>) {
    asset_server.load_with_settings::<Fbx, FbxLoaderSettings>(
        "models/environment.fbx",
        |settings: &mut FbxLoaderSettings| {
            settings.load_cameras = false;
            settings.load_lights = false;
            settings.convert_coordinates = true;
        }
    );
}

Asset Labels

The plugin uses labeled sub-assets to allow loading specific parts of an FBX file:

• Scene{N} - Scene hierarchy (N is the scene index)
• Node{N} - Individual nodes
• Mesh{N} - Mesh data
• Material{N} - Materials
• Texture{N} - Textures
• Animation{N} - Animations
• Skin{N} - Skinning data
• DefaultMaterial - Default material when none is specified

Supported Features

Geometry

• Triangle meshes
• Multi-material meshes (face groups)
• Vertex positions, normals, UVs
• Vertex colors
• Tangents

Materials

• PBR materials (base color, metallic, roughness)
• Texture mapping
• Normal maps
• Emission
• Alpha blending

Animation

• Skeletal animation
• Skinning with bone weights
• Transform animations

(Animations are a planned feature, not yet forwarded to Bevy)

Scene Elements

• Node hierarchy
• Lights (directional, point, spot)
• Cameras

Limitations

• Requires FBX files to have been exported with triangulated meshes
• NURBS and subdivision surfaces are not directly supported
• Some advanced material features may not be fully supported

Examples

See the examples/ directory for more detailed usage examples.

License

Licensed under either of:

• Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.