Problems with iterating over components and using set_editor_property

Development Pipeline & Plugins Editor Scripting
1

Hi,

I am trying to add a tag to SceneComponents with a Script.



import unreal

actors = unreal.EditorLevelLibrary.get_selected_level_actors() 
sceneComponents = actors[0].get_components_by_class(unreal.SceneComponent)
for sceneComponent in sceneComponents:
    name = sceneComponent.get_name()
    print name
    if name.find("@") != -1:
        tag = name.split("@")[1]
        a = unreal.Array(unreal.Name)
        a.insert(0,tag)
        sceneComponent.set_editor_property("component_tags", a)

This works for the first SceneComponent, after that, the whole SceneComponents List seems to be destroyed by the garbage collector…
As you can see at the print out of the name…

So is it not possible to iterate over a list of components and use set_editor_property???



LogPython: DefaultSceneRoot1
LogPython: BillboardComponent_40
LogPython: W672699_H00_GMFuellung_normal_stp
LogPython: W672699_H00
LogPython: W676988_01_Bediengehaeuse_zurGMConfecPROOSu_Mo__701092500_1
LogPython: W381961_H00_W381961_H00_1_mesh
LogPython: W679288_00_Distanzstueck_zumBediengehaeuseGMConfecPRO_5_mesh
LogPython: W679286_00_Halteblech_zuBediengehaeuseGMConfecPRO_1
LogPython: W107084_00_6KT_Schraube_M8X20A2_3_mesh
LogPython: R146927_00_6KT_Schraube_M8X30A2_4_mesh
LogPython: W108633_A00_W108633_A00_4@wasser
LogPython: TRASH_StaticMeshComponent_2055
LogPython: TRASH_StaticMeshComponent_2047
LogPython: TRASH_SceneComponent_2069
LogPython: TRASH_SceneComponent_2071
LogPython: TRASH_StaticMeshComponent_2041
LogPython: TRASH_StaticMeshComponent_2045
LogPython: TRASH_SceneComponent_2064
LogPython: TRASH_SceneComponent_2079
LogPython: TRASH_SceneComponent_2074
LogPython: TRASH_SceneComponent_2065
LogPython: TRASH_StaticMeshComponent_2040
LogPython: TRASH_StaticMeshComponent_2054
LogPython: TRASH_StaticMeshComponent_2048
LogPython: TRASH_StaticMeshComponent_2057
LogPython: TRASH_SceneComponent_2067
LogPython: TRASH_SceneComponent_2072
LogPython: TRASH_StaticMeshComponent_2058
LogPython: TRASH_SceneComponent_2081
LogPython: TRASH_StaticMeshComponent_2051
LogPython: TRASH_SceneComponent_2073
LogPython: TRASH_StaticMeshComponent_2052
LogPython: TRASH_StaticMeshComponent_2061
LogPython: TRASH_SceneComponent_2077
LogPython: TRASH_StaticMeshComponent_2062
LogPython: TRASH_SceneComponent_2070
LogPython: TRASH_SceneComponent_2075
LogPython: TRASH_SceneComponent_2066
LogPython: TRASH_StaticMeshComponent_2059
LogPython: TRASH_SceneComponent_2078
LogPython: TRASH_SceneComponent_2082
LogPython: TRASH_StaticMeshComponent_2053
LogPython: TRASH_SceneComponent_2080
LogPython: TRASH_SceneComponent_2068
LogPython: TRASH_StaticMeshComponent_2049
LogPython: TRASH_StaticMeshComponent_2044
LogPython: TRASH_StaticMeshComponent_2043
LogPython: TRASH_SceneComponent_2085
LogPython: TRASH_SceneComponent_2084
LogPython: TRASH_StaticMeshComponent_2042
LogPython: TRASH_SceneComponent_2083
2

This works… But according to the documentation set_editor_property is rather recommended:



        sceneComponent.component_tags = a
        #sceneComponent.set_editor_property("component_tags", a)
3

This is not what you are looking for, but i had a similar situation and ended up using the “actor” tags



meshActor = unreal.EditorLevelLibrary.spawn_actor_from_class(unreal.StaticMeshActor, [0,0,0], rotation=[0,0,0])
meshActor.tags = "words","2","foo bar"]
print(meshActor.tags)
print(meshActor.tags[1])
4

Anyone knows the reasoning behind why set_editor_property causes consequent components in the array to TRASH_*?

The above mentioned alternatives will not work for all properties as some are read only, and trying to modify these throws an error like Exception: StaticMeshComponent: Property 'CustomDepthStencilValue' for attribute 'custom_depth_stencil_value' on 'StaticMeshComponent' is read-only and cannot be set.

5

I have noticed the exact same thing, and was just about to make a post until I saw this topic :wink:

I will try the workaround suggested, as I only need to edit intensity properties on lights, but it would be good to get to the bottom of it