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[Merged by Bors] - Validate vertex attribute format on insert #5259

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[Merged by Bors] - Validate vertex attribute format on insert #5259

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ab6d82f
Validate attributes format on insert
IceSentry Jul 9, 2022
832cae1
Update crates/bevy_render/src/mesh/mesh/mod.rs
IceSentry Jul 9, 2022
108a178
add panics section to docstring
IceSentry Jul 9, 2022
3e796b2
Update crates/bevy_render/src/mesh/mesh/mod.rs
IceSentry Jul 9, 2022
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35 changes: 27 additions & 8 deletions crates/bevy_render/src/mesh/mesh/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -13,7 +13,7 @@ use bevy_derive::EnumVariantMeta;
use bevy_ecs::system::{lifetimeless::SRes, SystemParamItem};
use bevy_math::*;
use bevy_reflect::TypeUuid;
use bevy_utils::Hashed;
use bevy_utils::{tracing::error, Hashed};
use std::{collections::BTreeMap, hash::Hash, iter::FusedIterator};
use thiserror::Error;
use wgpu::{
Expand Down Expand Up @@ -107,13 +107,19 @@ impl Mesh {
attribute: MeshVertexAttribute,
values: impl Into<VertexAttributeValues>,
) {
self.attributes.insert(
attribute.id,
MeshAttributeData {
attribute,
values: values.into(),
},
);
let values: VertexAttributeValues = values.into();

let values_format = VertexFormat::from(&values);
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Kinda weird that this is a From impl instead of a .format() getter, and funnily enough this is going to be the only place it is used.
Ignore this comment, that's for another PR.

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That's fair, but why not add it to this PR? It would make that code clearer and it seems directly related.

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Ah, I just didn't want to push it onto you, could've worded that differently.
Feel free to :)

if values_format != attribute.format {
error!(
"Invalid attribute format for {} given format is {:?} but expected {:?}",
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attribute.name, values_format, attribute.format
);
panic!("Failed to insert attribute");
}

self.attributes
.insert(attribute.id, MeshAttributeData { attribute, values });
}

/// Removes the data for a vertex attribute
Expand Down Expand Up @@ -994,3 +1000,16 @@ fn generate_tangents_for_mesh(mesh: &Mesh) -> Result<Vec<[f32; 4]>, GenerateTang

Ok(mikktspace_mesh.tangents)
}

#[cfg(test)]
mod tests {
use super::Mesh;
use wgpu::PrimitiveTopology;

#[test]
#[should_panic]
fn panic_invalid_format() {
let mut mesh = Mesh::new(PrimitiveTopology::TriangleList);
mesh.insert_attribute(Mesh::ATTRIBUTE_UV_0, vec![[0.0, 0.0, 0.0]]);
}
}