LowLevelMesh.PartsCollection An object that holds a mutable collection low-level mesh parts. Declarationstruct PartsCollection TopicsUpdating collection contentsappend(_:)append(contentsOf:)replaceAll(_:)removeAll() RelationshipsConforms ToBidirectionalCollectionCollectionCopyableEscapableMutableCollectionRandomAccessCollectionSequence See AlsoUpdatable meshesIntegrating virtual objects with your environmentCreating a spatial drawing app with RealityKitCreating a plane with low-level meshLowLevelMeshLowLevelMesh.DescriptorLowLevelMesh.PartLowLevelMesh.LayoutLowLevelMesh.AttributeLowLevelMesh.VertexSemanticLowLevelBufferLowLevelInstanceData