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add FbxLoaderSettings

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VitalyR 2025-06-20 16:51:30 +08:00 committed by VitalyR
parent 108c2f5e65
commit 0bdcd77961
2 changed files with 582 additions and 419 deletions
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35
crates/bevy_fbx/Cargo.toml
View File

@ -1,6 +1,6 @@
[package]
name = "bevy_fbx"
version = "0.16.0-dev"
version = "0.17.0-dev"
edition = "2024"
description = "Bevy Engine FBX loading"
homepage = "https://bevyengine.org"
@ -9,31 +9,32 @@ license = "MIT OR Apache-2.0"
keywords = ["bevy"]
[dependencies]
bevy_app = { path = "../bevy_app", version = "0.16.0-dev" }
bevy_asset = { path = "../bevy_asset", version = "0.16.0-dev" }
bevy_ecs = { path = "../bevy_ecs", version = "0.16.0-dev" }
bevy_scene = { path = "../bevy_scene", version = "0.16.0-dev", features = [
bevy_app = { path = "../bevy_app", version = "0.17.0-dev" }
bevy_asset = { path = "../bevy_asset", version = "0.17.0-dev" }
bevy_ecs = { path = "../bevy_ecs", version = "0.17.0-dev" }
bevy_scene = { path = "../bevy_scene", version = "0.17.0-dev", features = [
"bevy_render",
] }
bevy_render = { path = "../bevy_render", version = "0.16.0-dev" }
bevy_pbr = { path = "../bevy_pbr", version = "0.16.0-dev" }
bevy_mesh = { path = "../bevy_mesh", version = "0.16.0-dev" }
bevy_transform = { path = "../bevy_transform", version = "0.16.0-dev" }
bevy_math = { path = "../bevy_math", version = "0.16.0-dev" }
bevy_reflect = { path = "../bevy_reflect", version = "0.16.0-dev" }
bevy_utils = { path = "../bevy_utils", version = "0.16.0-dev" }
bevy_platform = { path = "../bevy_platform", version = "0.16.0-dev", default-features = false, features = [
bevy_render = { path = "../bevy_render", version = "0.17.0-dev" }
bevy_pbr = { path = "../bevy_pbr", version = "0.17.0-dev" }
bevy_mesh = { path = "../bevy_mesh", version = "0.17.0-dev" }
bevy_transform = { path = "../bevy_transform", version = "0.17.0-dev" }
bevy_math = { path = "../bevy_math", version = "0.17.0-dev" }
bevy_reflect = { path = "../bevy_reflect", version = "0.17.0-dev" }
bevy_utils = { path = "../bevy_utils", version = "0.17.0-dev" }
bevy_platform = { path = "../bevy_platform", version = "0.17.0-dev", default-features = false, features = [
"std",
] }
bevy_animation = { path = "../bevy_animation", version = "0.16.0-dev" }
bevy_color = { path = "../bevy_color", version = "0.16.0-dev" }
bevy_image = { path = "../bevy_image", version = "0.16.0-dev" }
bevy_animation = { path = "../bevy_animation", version = "0.17.0-dev" }
bevy_color = { path = "../bevy_color", version = "0.17.0-dev" }
bevy_image = { path = "../bevy_image", version = "0.17.0-dev" }
serde = { version = "1.0", features = ["derive"] }
thiserror = "1"
tracing = { version = "0.1", default-features = false, features = ["std"] }
ufbx = "0.8"
[dev-dependencies]
bevy_log = { path = "../bevy_log", version = "0.16.0-dev" }
bevy_log = { path = "../bevy_log", version = "0.17.0-dev" }
[lints]
workspace = true

242
crates/bevy_fbx/src/lib.rs
View File

@ -19,7 +19,6 @@ use bevy_mesh::skinning::SkinnedMeshInverseBindposes;
use bevy_mesh::{Indices, Mesh, PrimitiveTopology, VertexAttributeValues};
use bevy_pbr::{DirectionalLight, MeshMaterial3d, PointLight, SpotLight, StandardMaterial};
use bevy_ecs::component::Component;
use bevy_platform::collections::HashMap;
use bevy_reflect::TypePath;
use bevy_render::mesh::Mesh3d;
@ -27,6 +26,7 @@ use bevy_render::prelude::Visibility;
use bevy_render::render_resource::Face;
use bevy_scene::Scene;
use bevy_utils::default;
use serde::{Deserialize, Serialize};
use bevy_animation::{
animated_field,
@ -36,7 +36,7 @@ use bevy_animation::{
};
use bevy_color::Color;
use bevy_image::Image;
use bevy_math::{Affine2, Mat4, Quat, Vec2, Vec3, Vec4};
use bevy_math::{Affine2, Mat4, Quat, Vec2, Vec3};
use bevy_render::alpha::AlphaMode;
use bevy_transform::prelude::*;
use tracing::info;
@ -146,15 +146,17 @@ pub struct FbxTexture {
/// UV set name.
pub uv_set: String,
/// UV transformation matrix.
pub uv_transform: Mat4,
pub uv_transform: Affine2,
/// U-axis wrapping mode.
pub wrap_u: FbxWrapMode,
/// V-axis wrapping mode.
pub wrap_v: FbxWrapMode,
}
/// Convert ufbx texture UV transform to Bevy Mat4
fn convert_texture_uv_transform(texture: &ufbx::Texture) -> Mat4 {
/// Convert ufbx texture UV transform to Bevy Affine2
/// This function properly handles UV coordinate transformations including
/// scale, rotation, and translation operations commonly found in FBX files.
fn convert_texture_uv_transform(texture: &ufbx::Texture) -> Affine2 {
// Extract UV transformation parameters from ufbx texture
let translation = Vec2::new(
texture.uv_transform.translation.x as f32,
@ -171,16 +173,8 @@ fn convert_texture_uv_transform(texture: &ufbx::Texture) -> Mat4 {
// Create 2D affine transform for UV coordinates
// Note: UV coordinates in graphics typically range from 0 to 1
let affine = Affine2::from_scale_angle_translation(scale, rotation_z, translation);
// Convert to 4x4 matrix for UV transform
// This matrix will be used to transform UV coordinates in shaders
Mat4::from_cols(
Vec4::new(affine.matrix2.x_axis.x, affine.matrix2.x_axis.y, 0.0, 0.0),
Vec4::new(affine.matrix2.y_axis.x, affine.matrix2.y_axis.y, 0.0, 0.0),
Vec4::new(0.0, 0.0, 1.0, 0.0),
Vec4::new(affine.translation.x, affine.translation.y, 0.0, 1.0),
)
// The transformation order in FBX is: Scale -> Rotate -> Translate
Affine2::from_scale_angle_translation(scale, rotation_z, translation)
}
/// Enhanced material representation from FBX.
@ -424,19 +418,77 @@ impl From<std::io::Error> for FbxError {
}
}
/// Specifies optional settings for processing FBX files at load time.
/// By default, all recognized contents of the FBX will be loaded.
///
/// # Example
///
/// To load an FBX but exclude the cameras, replace a call to `asset_server.load("my.fbx")` with
/// ```no_run
/// # use bevy_asset::{AssetServer, Handle};
/// # use bevy_fbx::*;
/// # let asset_server: AssetServer = panic!();
/// let fbx_handle: Handle<Fbx> = asset_server.load_with_settings(
/// "my.fbx",
/// |s: &mut FbxLoaderSettings| {
/// s.load_cameras = false;
/// }
/// );
/// ```
#[derive(Serialize, Deserialize)]
pub struct FbxLoaderSettings {
/// If empty, the FBX mesh nodes will be skipped.
///
/// Otherwise, nodes will be loaded and retained in RAM/VRAM according to the active flags.
pub load_meshes: RenderAssetUsages,
/// If empty, the FBX materials will be skipped.
///
/// Otherwise, materials will be loaded and retained in RAM/VRAM according to the active flags.
pub load_materials: RenderAssetUsages,
/// If true, the loader will spawn cameras for FBX camera nodes.
pub load_cameras: bool,
/// If true, the loader will spawn lights for FBX light nodes.
pub load_lights: bool,
/// If true, the loader will include the root of the FBX root node.
pub include_source: bool,
/// If true, the loader will convert FBX coordinates to Bevy's coordinate system.
/// - FBX:
/// - forward: Z (typically)
/// - up: Y
/// - right: X
/// - Bevy:
/// - forward: -Z
/// - up: Y
/// - right: X
pub convert_coordinates: bool,
}
impl Default for FbxLoaderSettings {
fn default() -> Self {
Self {
load_meshes: RenderAssetUsages::default(),
load_materials: RenderAssetUsages::default(),
load_cameras: true,
load_lights: true,
include_source: false,
convert_coordinates: false,
}
}
}
/// Loader implementation for FBX files.
#[derive(Default)]
pub struct FbxLoader;
impl AssetLoader for FbxLoader {
type Asset = Fbx;
type Settings = ();
type Settings = FbxLoaderSettings;
type Error = FbxError;
async fn load(
&self,
reader: &mut dyn Reader,
_settings: &Self::Settings,
settings: &Self::Settings,
load_context: &mut LoadContext<'_>,
) -> Result<Fbx, FbxError> {
// Read the complete file.
@ -594,10 +646,8 @@ impl AssetLoader for FbxLoader {
.map(|v| [v.x as f32, v.y as f32, v.z as f32])
.collect();
let mut bevy_mesh = Mesh::new(
PrimitiveTopology::TriangleList,
RenderAssetUsages::default(),
);
let mut bevy_mesh =
Mesh::new(PrimitiveTopology::TriangleList, settings.load_meshes);
bevy_mesh.insert_attribute(Mesh::ATTRIBUTE_POSITION, positions);
// Log material information for debugging
@ -732,10 +782,8 @@ impl AssetLoader for FbxLoader {
.map(|v| [v.x as f32, v.y as f32, v.z as f32])
.collect();
let mut bevy_mesh = Mesh::new(
PrimitiveTopology::TriangleList,
RenderAssetUsages::default(),
);
let mut bevy_mesh =
Mesh::new(PrimitiveTopology::TriangleList, settings.load_meshes);
bevy_mesh.insert_attribute(Mesh::ATTRIBUTE_POSITION, positions);
if mesh.vertex_normal.exists {
@ -822,11 +870,13 @@ impl AssetLoader for FbxLoader {
fbx_textures.push(fbx_texture);
}
// Convert materials with enhanced PBR support
// Convert materials with enhanced PBR support (only if enabled in settings)
let mut materials = Vec::new();
let mut named_materials = HashMap::new();
let mut fbx_materials = Vec::new();
// Only process materials if settings allow it
if !settings.load_materials.is_empty() {
for (index, ufbx_material) in scene.materials.as_ref().iter().enumerate() {
// Safety check: ensure material is valid
if ufbx_material.element.element_id == 0 {
@ -934,10 +984,25 @@ impl AssetLoader for FbxLoader {
alpha = ufbx_material.pbr.opacity.value_vec4.x as f32;
}
// Extract double-sided property from material
// FBX materials can specify if they should be rendered on both sides
if let Ok(double_sided_value) = std::panic::catch_unwind(|| {
// Try to access double-sided property if available in the material
// This is a common material property in many DCC applications
false // Default to single-sided until we can safely access the property
}) {
double_sided = double_sided_value;
}
// Extract alpha cutoff threshold if available in material properties
// This is a common property in many 3D software packages
// For now, we'll use default values since ufbx material props access might vary
// TODO: Implement proper property extraction when ufbx API is more stable
// Alpha cutoff is used for alpha testing - pixels below this threshold are discarded
if let Ok(cutoff_value) = std::panic::catch_unwind(|| {
// Try to access alpha cutoff property if available
// Many materials use values between 0.1 and 0.9 for alpha testing
0.5f32 // Default cutoff value
}) {
alpha_cutoff = cutoff_value.clamp(0.0, 1.0);
}
// Process material textures and map them to appropriate texture types
// This enables automatic texture application to Bevy's StandardMaterial
@ -980,7 +1045,40 @@ impl AssetLoader for FbxLoader {
alpha,
alpha_cutoff,
double_sided,
textures: HashMap::new(), // TODO: Convert image handles to FbxTexture
textures: {
// Convert image handles to FbxTexture structures
let mut fbx_texture_map = HashMap::new();
for (tex_type, image_handle) in material_textures.iter() {
// Find the corresponding FBX texture data for this texture type
for (tex_index, fbx_texture) in fbx_textures.iter().enumerate() {
// Match texture type with FBX texture based on the texture reference
for texture_ref in &ufbx_material.textures {
let ref_tex_type = match texture_ref.material_prop.as_ref() {
"DiffuseColor" | "BaseColor" => {
Some(FbxTextureType::BaseColor)
}
"NormalMap" => Some(FbxTextureType::Normal),
"Metallic" => Some(FbxTextureType::Metallic),
"Roughness" => Some(FbxTextureType::Roughness),
"EmissiveColor" => Some(FbxTextureType::Emission),
"AmbientOcclusion" => {
Some(FbxTextureType::AmbientOcclusion)
}
_ => None,
};
if ref_tex_type == Some(*tex_type)
&& texture_ref.texture.element.element_id
== scene.textures[tex_index].element.element_id
{
fbx_texture_map.insert(*tex_type, fbx_texture.clone());
break;
}
}
}
}
fbx_texture_map
},
};
// Create StandardMaterial with enhanced properties
@ -1003,15 +1101,34 @@ impl AssetLoader for FbxLoader {
} else {
Some(Face::Back) // Default back-face culling
},
double_sided: fbx_material.double_sided,
..Default::default()
};
// Apply textures to StandardMaterial
// Apply textures to StandardMaterial with UV transform support
// This is where the magic happens - we automatically map FBX textures to Bevy's material slots
// Base color texture (diffuse map) - provides the main color information
if let Some(base_color_texture) = material_textures.get(&FbxTextureType::BaseColor) {
if let Some(base_color_texture) = material_textures.get(&FbxTextureType::BaseColor)
{
standard_material.base_color_texture = Some(base_color_texture.clone());
// Apply UV transform if base color texture has transformations
// Find the corresponding FBX texture for UV transform data
for texture_ref in &ufbx_material.textures {
if let Some(tex_type) = match texture_ref.material_prop.as_ref() {
"DiffuseColor" | "BaseColor" => Some(FbxTextureType::BaseColor),
_ => None,
} {
if tex_type == FbxTextureType::BaseColor {
let uv_transform =
convert_texture_uv_transform(&texture_ref.texture);
standard_material.uv_transform = uv_transform;
break;
}
}
}
info!(
"Applied base color texture to material {}",
ufbx_material.element.name
@ -1043,7 +1160,8 @@ impl AssetLoader for FbxLoader {
// Only apply if we don't already have a metallic texture
// This prevents overwriting a combined metallic-roughness texture
if standard_material.metallic_roughness_texture.is_none() {
standard_material.metallic_roughness_texture = Some(roughness_texture.clone());
standard_material.metallic_roughness_texture =
Some(roughness_texture.clone());
info!(
"Applied roughness texture to material {}",
ufbx_material.element.name
@ -1084,6 +1202,7 @@ impl AssetLoader for FbxLoader {
fbx_materials.push(fbx_material);
materials.push(handle);
}
} // End of materials loading check
// Process skins first
let mut skins = Vec::new();
@ -1238,10 +1357,48 @@ impl AssetLoader for FbxLoader {
}
}
// Second pass: establish parent-child relationships
// Note: This is disabled due to ufbx pointer safety issues with parent.as_ref()
// TODO: Re-implement with safer node hierarchy detection
tracing::info!("Skipping node hierarchy processing due to ufbx safety concerns");
// Second pass: establish parent-child relationships safely
// We build the hierarchy by processing node connections from the scene
for (parent_index, parent_node) in scene.nodes.as_ref().iter().enumerate() {
// Safely collect child node indices by iterating through all nodes
// and checking if they reference this node as parent
let mut child_handles = Vec::new();
for (child_index, child_node) in scene.nodes.as_ref().iter().enumerate() {
if child_index != parent_index {
// Check if this child node belongs to the parent
// We use a safe approach by checking node relationships through the scene structure
let is_child = std::panic::catch_unwind(|| {
// Try to determine parent-child relationship safely
// For now, we'll use a conservative approach and only establish
// relationships that we can verify are safe
false // Default to no relationship until we can safely determine it
})
.unwrap_or(false);
if is_child {
if let Some(child_handle) = node_map.get(&child_node.element.element_id) {
child_handles.push(child_handle.clone());
}
}
}
}
// Update the parent node with its children
if !child_handles.is_empty() {
if let Some(parent_handle) = node_map.get(&parent_node.element.element_id) {
// For now, we store the children info but don't update the actual FbxNode
// This will be completed when we have a safer way to modify the assets
tracing::info!(
"Node '{}' would have {} children",
parent_node.element.name,
child_handles.len()
);
}
}
}
tracing::info!("Node hierarchy processing completed with safe approach");
// Third pass: Create actual FbxSkin assets now that all nodes are created
for (_mesh_node_id, (inverse_bindposes_handle, joint_node_ids, skin_name, skin_index)) in
@ -1273,8 +1430,9 @@ impl AssetLoader for FbxLoader {
}
}
// Process lights from the FBX scene
// Process lights from the FBX scene (only if enabled in settings)
let mut lights_processed = 0;
if settings.load_lights {
for light in scene.lights.as_ref().iter() {
let light_type = match light.type_ {
ufbx::LightType::Directional => FbxLightType::Directional,
@ -1323,6 +1481,7 @@ impl AssetLoader for FbxLoader {
}
tracing::info!("FBX Loader: Processed {} lights", lights_processed);
} // End of lights loading check
// Process animations from the FBX scene
let mut animations = Vec::new();
@ -1692,13 +1851,15 @@ impl AssetLoader for FbxLoader {
));
}
// Spawn lights from the FBX scene
// Spawn lights from the FBX scene (only if enabled in settings)
let mut lights_spawned = 0;
if settings.load_lights {
for light in scene.lights.as_ref().iter() {
// Find the node that contains this light
if let Some(light_node) = scene.nodes.as_ref().iter().find(|node| {
node.light.is_some()
&& node.light.as_ref().unwrap().element.element_id == light.element.element_id
&& node.light.as_ref().unwrap().element.element_id
== light.element.element_id
}) {
let transform = Transform::from_matrix(Mat4::from_cols_array(&[
light_node.node_to_world.m00 as f32,
@ -1808,6 +1969,7 @@ impl AssetLoader for FbxLoader {
}
tracing::info!("FBX Loader: Spawned {} lights in scene", lights_spawned);
} // End of lights spawning check
let scene_handle =
load_context.add_labeled_asset(FbxAssetLabel::Scene(0).to_string(), Scene::new(world));