| channel | UV 通道，处于 [0..7] 范围内。 |
| outUVs | The destination texture coordinates array. |
Populates an array with the UVs from the MeshData.
The destination array must have at least vertexCount elements. The UV at each index corresponds to the vertex with the same index. Texture coordinate data will be converted into Vector2, Vector3 or Vector4 format as needed. See Also: Mesh.GetUVs, HasVertexAttribute, Mesh.AcquireReadOnlyMeshData.