Blueprint: Click to change Levels?

BernhardRieder · August 2, 2022, 10:37pm

Persistent Scene with multiple Levels:

Persistent
→ Level_001
→ Level_002
–>Level_003
→ etc.

I want a simple button, whenever you click that button, it rotates through the different levels. Starting from Level_001 and until the last Level is reached, and then start over again.

Not sure how to construct the blueprint for completion.
Any little help is highly appreciated, thank you so much!

anonymous_user_b04a32c1 · August 2, 2022, 11:17pm

You’d need a widget blueprint. And use a game Instance.

Just have the widget blueprint created in begin play of all your levels, and add it to viewport, you can find tutorials on how to do this ez.

When the button gets pressed “get game instance” and cast it to your game instance. And use that to store the list of levels in any way you want, could be a number, an array.

The point is that game instance isn’t reset when you change levels.

Astrotronic · August 3, 2022, 1:35am

Hi Bernhard,

Buckle up because I’m about to drop some knowledge about MODULO on you.

(Initialize indexvar to -1 )

The cool thing about this, is that you can add/remove levels from the array and it will automagically loop back to the first once it hits the end.

Let us know if you have any problems with implementation!

BernhardRieder · August 3, 2022, 5:26am

ohh man, that’s super awesome and I do appreciate your help! This is mega.
However, I am not able to rebuild the event graph as shown.

And you know why? Because I don’t know what actions you are using.

I would need to know each action name. The action names for each node I have to enter into the search box.

I am curious, where I could find a full list of all actions and practical video tutorials that would explain all those actions, and how to use them with examples.

In general, I was always wondering where to start if you want to understand the full library of all the existing actions.

I guess, in this case, it might be easiest, to record a video while building the graph. Then I can see what actions you’ve been using.

A download link from that blueprint would be also helpful. This would allow me to migrate it into my project.

Thank you soooo much for all your help, I really do appreciate that!!!

Astrotronic · August 3, 2022, 5:26pm

Glad to be of help,

Getting the increment int (++) and modulo (%) nodes are as easy as keying in those symbols in the search box.

The other thing that might not be self-evident is creating a ‘Name’ variable type and then converting that variable into an array. (Any tutorial video on arrays will show how to do this)

You’d then ‘get’ the array, and from that getter drag out functions like ‘Length’ and ‘Get Index’

It would be best to create the variables and construct the graph yourself, but here is the blueprint that you could copy-paste into the graph that will place some of the nodes. (GET and LENGTH nodes might need to be recreated, they can get finnicky since they need a very specific variable reference)

About videos to understand the ‘library of actions’ - Matthew , Wadstein created many videos explaining each function/action

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   CustomProperties Pin (PinId=04D87DCE43DF720B985B259E4206140E,PinName="bMakeVisibleAfterLoad",PinType.PinCategory="bool",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,DefaultValue="false",AutogeneratedDefaultValue="false",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=7B9C20244054928EE6D461B862B334C8,PinName="bShouldBlockOnLoad",PinType.PinCategory="bool",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,DefaultValue="false",AutogeneratedDefaultValue="false",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=69178F754DC8F3B90832D69160FFF1A2,PinName="LatentInfo",PinType.PinCategory="struct",PinType.PinSubCategory="",PinType.PinSubCategoryObject=ScriptStruct'"/Script/Engine.LatentActionInfo"',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,DefaultValue="(Linkage=-1,UUID=-1,ExecutionFunction=\"\",CallbackTarget=None)",AutogeneratedDefaultValue="LatentInfo",PersistentGuid=00000000000000000000000000000000,bHidden=True,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
End Object
Begin Object Class=/Script/BlueprintGraph.K2Node_VariableGet Name="K2Node_VariableGet_4"
   VariableReference=(MemberName="LevelArray",MemberGuid=FF719A114959909398020B963E33FCE8,bSelfContext=True)
   NodePosX=624
   NodePosY=368
   NodeGuid=63A7E1B84F4478BACAD011BFE038A314
   CustomProperties Pin (PinId=CAE6775F4273A3E09C8EDCA70D9D357D,PinName="LevelArray",Direction="EGPD_Output",PinType.PinCategory="name",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=Array,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,LinkedTo=(K2Node_CallArrayFunction_0 8C0EEBCA495FC3FF1C291E9ED0C55E2D,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=87848AFC476A55D0EA496B8248B9EB24,PinName="self",PinFriendlyName=NSLOCTEXT("K2Node", "Target", "Target"),PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=BlueprintGeneratedClass'"/Game/IndexBP.IndexBP_C"',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,PersistentGuid=00000000000000000000000000000000,bHidden=True,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
End Object
Begin Object Class=/Script/BlueprintGraph.K2Node_VariableGet Name="K2Node_VariableGet_5"
   VariableReference=(MemberName="LevelArray",MemberGuid=FF719A114959909398020B963E33FCE8,bSelfContext=True)
   NodePosX=1040
   NodePosY=160
   NodeGuid=F44DA35B4832521A42F6DA969BF3048B
   CustomProperties Pin (PinId=85C3F8B246CEF0246B0828A7321B5634,PinName="LevelArray",Direction="EGPD_Output",PinType.PinCategory="name",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=Array,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,LinkedTo=(K2Node_GetArrayItem_1 F9B2F55946D30AD65FC1CAAF11F1F7F0,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=ACAB13E2433C0F6BBF35539345A1630A,PinName="self",PinFriendlyName=NSLOCTEXT("K2Node", "Target", "Target"),PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=BlueprintGeneratedClass'"/Game/IndexBP.IndexBP_C"',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,PersistentGuid=00000000000000000000000000000000,bHidden=True,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
End Object
Begin Object Class=/Script/BlueprintGraph.K2Node_GetArrayItem Name="K2Node_GetArrayItem_1"
   bReturnByRefDesired=False
   NodePosX=1248
   NodePosY=160
   NodeGuid=A26BEFB64308E6C5922415B8DE5F8906
   CustomProperties Pin (PinId=F9B2F55946D30AD65FC1CAAF11F1F7F0,PinName="Array",PinType.PinCategory="name",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=Array,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,LinkedTo=(K2Node_VariableGet_5 85C3F8B246CEF0246B0828A7321B5634,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=0C203EFE4A9C4B5BD7E59880E021BC96,PinName="Dimension 1",PinType.PinCategory="int",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,DefaultValue="0",AutogeneratedDefaultValue="0",LinkedTo=(K2Node_CallFunction_2 5E376C0E4A7BA98F252F2BBDFB1C4E60,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=0FF68E4243F7B76B38679F858BECAC91,PinName="Output",Direction="EGPD_Output",PinType.PinCategory="name",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,LinkedTo=(K2Node_CallFunction_5 19F70A6A40002E4AB95A6FA838BFBFD3,K2Node_CallFunction_4 772F1AC8491A5D7435857BB76DA6DE10,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
End Object
Begin Object Class=/Script/BlueprintGraph.K2Node_CallFunction Name="K2Node_CallFunction_5"
   bIsPureFunc=True
   FunctionReference=(MemberParent=Class'"/Script/Engine.KismetStringLibrary"',MemberName="Conv_NameToString")
   NodePosX=1440
   NodePosY=64
   NodeGuid=0AB717DF426B31FEE30A2D9D6FD8372F
   CustomProperties Pin (PinId=454522AD487FE889F2BE7091945EE18B,PinName="self",PinFriendlyName=NSLOCTEXT("K2Node", "Target", "Target"),PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=Class'"/Script/Engine.KismetStringLibrary"',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,DefaultObject="/Script/Engine.Default__KismetStringLibrary",PersistentGuid=00000000000000000000000000000000,bHidden=True,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=19F70A6A40002E4AB95A6FA838BFBFD3,PinName="InName",PinType.PinCategory="name",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,DefaultValue="None",AutogeneratedDefaultValue="None",LinkedTo=(K2Node_GetArrayItem_1 0FF68E4243F7B76B38679F858BECAC91,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=3BA80B5948EBFDF65C3C5DB6AD41D3E9,PinName="ReturnValue",Direction="EGPD_Output",PinType.PinCategory="string",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,LinkedTo=(K2Node_CallFunction_3 3461DF3E4EEAD7C7E4ECA289CBD122C1,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
End Object

Cheers

BernhardRieder · August 4, 2022, 7:20am

Thank you so much. I made some progress tonight.
I was able to setup two buttons, and each button loads one specific level.

But… I can also load two different levels at the same time.
That’s something I would like to avoid.

I would need something like…
if Level_001 is loaded… other levels can’t be loaded.
If Level_002 is loaded… other levels can’t be loaded.
etc.

my current setup looks like the screenshot below. But again, I can load two levels at the same time, but want to make sure that shouldn’t be possible. What you think could I add to make this work?

Astrotronic · August 8, 2022, 5:32pm

Hi again,

Good question, as long as the list of levels contains only the levels you want to load/unload (No levels that need to be loaded all the time) Looping through the list of levels and finding/unloading all the levels that are NOT EQUAL (!=) to the level index you just loaded is the idea that comes first to me.

Cheers

anonymous_user_ec07103d · August 15, 2022, 9:46am

each button loads one specific level.