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Handle empty morph weights when loading gltf (#9867)

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# Objective

Fixes https://github.com/bevyengine/bevy/issues/9863.

## Solution

Spawn `MorphWeights` after we handle `MeshMorphWeights` for the
children.
This commit is contained in:
floppyhammer 2023-09-21 01:40:00 +08:00 committed by GitHub
parent 038d11329c
commit 354a5b7933
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 13 additions and 12 deletions
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25
crates/bevy_gltf/src/loader.rs
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@ -810,18 +810,7 @@ fn load_node(
// Map node index to entity
node_index_to_entity_map.insert(gltf_node.index(), node.id());
if let Some(mesh) = gltf_node.mesh() {
if let Some(weights) = mesh.weights() {
let first_mesh = if let Some(primitive) = mesh.primitives().next() {
let primitive_label = primitive_label(&mesh, &primitive);
let handle: Handle<Mesh> = load_context.get_label_handle(&primitive_label);
Some(handle)
} else {
None
};
node.insert(MorphWeights::new(weights.to_vec(), first_mesh)?);
}
};
let mut morph_weights = None;
node.with_children(|parent| {
if let Some(mesh) = gltf_node.mesh() {
@ -853,6 +842,11 @@ fn load_node(
Some(weights) => weights.to_vec(),
None => vec![0.0; target_count],
};
if morph_weights.is_none() {
morph_weights = Some(weights.clone());
}
// unwrap: the parent's call to `MeshMorphWeights::new`
// means this code doesn't run if it returns an `Err`.
// According to https://registry.khronos.org/glTF/specs/2.0/glTF-2.0.html#morph-targets
@ -972,6 +966,13 @@ fn load_node(
}
}
});
if let (Some(mesh), Some(weights)) = (gltf_node.mesh(), morph_weights) {
let primitive_label = mesh.primitives().next().map(|p| primitive_label(&mesh, &p));
let first_mesh = primitive_label.map(|label| load_context.get_label_handle(label));
node.insert(MorphWeights::new(weights, first_mesh)?);
}
if let Some(err) = gltf_error {
Err(err)
} else {