Struct MeshData 

pub struct MeshData {
    pub name: Option<String>,
    pub positions: Vec<[f32; 3]>,
    pub normals: Vec<[f32; 3]>,
    pub uvs: Vec<Vec<[f32; 2]>>,
    pub submeshes: Vec<SubmeshData>,
}

A Unity-shaped mesh ready for export. All data is in Unity’s left-handed coordinate system; the build step inverts handedness to produce right-handed glTF output.

Fields

name: Option<String>

Mesh name, or None to omit from the glTF output.

positions: Vec<[f32; 3]>

Vertex positions. Tightly packed [x, y, z] floats (Unity space, X negated vs glTF).

normals: Vec<[f32; 3]>

Vertex normals, same length as positions. Empty if the mesh has no normals.

uvs: Vec<Vec<[f32; 2]>>

UV channels. uvs[k] holds all vertices for TEXCOORD_k (Unity bottom-left origin, V will be flipped during the build step).

submeshes: Vec<SubmeshData>

One sub-mesh per glTF primitive.