private void PatchAppearance()

in MREUnityRuntimeLib/Core/Actor.cs [1124:1203]
65 lines of code
19 McCabe index (conditional complexity)

		private void PatchAppearance(AppearancePatch appearance)
		{
			if (appearance == null)
			{
				return;
			}

			bool forceUpdateRenderer = false;

			// update renderers
			if (appearance.MaterialId != null || appearance.MeshId != null)
			{
				// patch mesh
				if (appearance.MeshId != null)
				{
					MeshId = appearance.MeshId.Value;
				}

				// apply mesh/material to game object
				if (MeshId != Guid.Empty)
				{
					// guarantee renderer component
					if (renderer == null)
					{
						renderer = gameObject.AddComponent<MeshRenderer>();
						renderer.sharedMaterial = MREAPI.AppsAPI.DefaultMaterial;
						forceUpdateRenderer = true;
					}
					// guarantee mesh filter (unless it has a skinned mesh renderer)
					if (renderer is MeshRenderer && meshFilter == null)
					{
						meshFilter = gameObject.AddComponent<MeshFilter>();
					}

					// look up and assign mesh
					var updatedMeshId = MeshId;
					App.AssetManager.OnSet(MeshId, sharedMesh =>
					{
						if (!this || MeshId != updatedMeshId) return;
						UnityMesh = (Mesh)sharedMesh.Asset;
						if (Collider != null && Collider.Shape == ColliderType.Auto)
						{
							SetCollider(new ColliderPatch()
							{
								Geometry = new AutoColliderGeometry()
							});
						}
					});

					// patch material
					if (appearance.MaterialId != null)
					{
						MaterialId = appearance.MaterialId.Value;
					}
				}
				// clean up unused components
				else
				{
					Destroy(Renderer);
					Destroy(MeshFilter);
					if (Collider != null && Collider.Shape == ColliderType.Auto)
					{
						Destroy(_collider);
						Destroy(Collider);
						_collider = null;
						Collider = null;
					}
				}
			}

			// apply visibility after renderer updated
			if (appearance.Enabled != null || forceUpdateRenderer)
			{
				if (appearance.Enabled != null)
				{
					appearanceEnabled = appearance.Enabled.Value;
				}
				ApplyVisibilityUpdate(this);
			}
		}