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Development Discussion Blueprint Visual Scripting
#1

Hello UE Community!

I’ve just started learning BP yesterday and I’m running into a small issue. I’m hoping someone here can point me in the right direction.

I was following one of the BP quick startup videos: “How to Make a Simple Conveyor Volume”](https://www.youtube.com/watch?v=aqRUe7pm4Ok&feature=youtu.be) and I’ve got it working as shown in the video. My issue is that when the actor leaves the volume, it loses all momentum and stops dead in it’s track. I would like to have it stop gaining speed when it leaves the volume, instead of losing all of its momentum instantly (Sorta identical to the Trigger_Push in the source engine). I’ve attempted a few different things(AddForce, AddImpulse) but I couldn’t seem to get those working either.

Here is the tutorial code:


Begin Object Class=K2Node_Event Name="K2Node_Event_144"
   Begin Object Class=EdGraphPin Name="EdGraphPin_4363"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_4362"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_4361"
   End Object
   Begin Object Name="EdGraphPin_4363"
      PinName="DeltaSeconds"
      PinToolTip="Delta Seconds
Float"
      Direction=EGPD_Output
      PinType=(PinCategory="float")
      DefaultValue="0.0"
      AutogeneratedDefaultValue="0.0"
      LinkedTo(0)=EdGraphPin'K2Node_CommutativeAssociativeBinaryOperator_50.EdGraphPin_15448'
   End Object
   Begin Object Name="EdGraphPin_4362"
      PinName="then"
      Direction=EGPD_Output
      PinType=(PinCategory="exec")
      LinkedTo(0)=EdGraphPin'K2Node_MacroInstance_27.EdGraphPin_4479'
   End Object
   Begin Object Name="EdGraphPin_4361"
      PinName="OutputDelegate"
      Direction=EGPD_Output
      PinType=(PinCategory="delegate",PinSubCategoryMemberReference=(MemberParentClass=Class'/Script/Engine.Actor',MemberName="ReceiveTick"))
   End Object
   EventSignatureName="ReceiveTick"
   EventSignatureClass=Class'/Script/Engine.Actor'
   bOverrideFunction=True
   Pins(0)=EdGraphPin'EdGraphPin_4361'
   Pins(1)=EdGraphPin'EdGraphPin_4362'
   Pins(2)=EdGraphPin'EdGraphPin_4363'
   NodePosX=-80
   NodePosY=128
   NodeGuid=43B6B46149A0923A332DF1B345A99485
End Object
Begin Object Class=K2Node_CallFunctionOnMember Name="K2Node_CallFunctionOnMember_18"
   Begin Object Class=EdGraphPin Name="EdGraphPin_4374"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_4373"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_4372"
   End Object
   Begin Object Name="EdGraphPin_4374"
      PinName="ClassFilter"
      PinToolTip="Class Filter
Object Class

[optional] If set, only returns actors of this class or subclasses"
      PinType=(PinCategory="class",PinSubCategoryObject=Class'/Script/CoreUObject.Object')
   End Object
   Begin Object Name="EdGraphPin_4373"
      PinName="OverlappingActors"
      PinToolTip="Overlapping Actors
Array of Actor References

[out] Returned list of overlapping actors"
      Direction=EGPD_Output
      PinType=(PinCategory="object",PinSubCategoryObject=Class'/Script/Engine.Actor',bIsArray=True)
      LinkedTo(0)=EdGraphPin'K2Node_MacroInstance_27.EdGraphPin_4480'
   End Object
   Begin Object Name="EdGraphPin_4372"
      PinName="self"
      PinFriendlyName="Target"
      PinToolTip="Target
Trigger Push Reference"
      PinType=(PinCategory="object",PinSubCategoryObject=BlueprintGeneratedClass'/Game/Blueprints/TriggerPush.TriggerPush_C')
   End Object
   MemberVariableToCallOn=(MemberParentClass=BlueprintGeneratedClass'/Game/Blueprints/TriggerPush.TriggerPush_C',MemberName="Box")
   bIsPureFunc=True
   bIsConstFunc=True
   FunctionReference=(MemberParentClass=Class'/Script/Engine.PrimitiveComponent',MemberName="GetOverlappingActors")
   Pins(0)=EdGraphPin'EdGraphPin_4372'
   Pins(1)=EdGraphPin'EdGraphPin_4373'
   Pins(2)=EdGraphPin'EdGraphPin_4374'
   NodePosX=-80
   NodePosY=272
   NodeGuid=79D09A474886FDC3E1095AAD2436E3D7
End Object
Begin Object Class=K2Node_MacroInstance Name="K2Node_MacroInstance_27"
   Begin Object Class=EdGraphPin Name="EdGraphPin_4484"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_4483"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_4482"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_4481"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_4480"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_4479"
   End Object
   Begin Object Name="EdGraphPin_4484"
      PinName="Completed"
      Direction=EGPD_Output
      PinType=(PinCategory="exec")
   End Object
   Begin Object Name="EdGraphPin_4483"
      PinName="Array Index"
      Direction=EGPD_Output
      PinType=(PinCategory="int")
   End Object
   Begin Object Name="EdGraphPin_4482"
      PinName="Array Element"
      Direction=EGPD_Output
      PinType=(PinCategory="object",PinSubCategoryObject=Class'/Script/Engine.Actor')
      LinkedTo(0)=EdGraphPin'K2Node_CallFunction_2442.EdGraphPin_4434'
   End Object
   Begin Object Name="EdGraphPin_4481"
      PinName="LoopBody"
      Direction=EGPD_Output
      PinType=(PinCategory="exec")
      LinkedTo(0)=EdGraphPin'K2Node_CallFunction_2442.EdGraphPin_4432'
   End Object
   Begin Object Name="EdGraphPin_4480"
      PinName="Array"
      PinType=(PinCategory="object",PinSubCategoryObject=Class'/Script/Engine.Actor',bIsArray=True)
      LinkedTo(0)=EdGraphPin'K2Node_CallFunctionOnMember_18.EdGraphPin_4373'
   End Object
   Begin Object Name="EdGraphPin_4479"
      PinName="Exec"
      PinType=(PinCategory="exec")
      LinkedTo(0)=EdGraphPin'K2Node_Event_144.EdGraphPin_4362'
   End Object
   MacroGraphReference=(MacroGraph=EdGraph'/Engine/EditorBlueprintResources/StandardMacros.StandardMacros:ForEachLoop',GraphBlueprint=Blueprint'/Engine/EditorBlueprintResources/StandardMacros.StandardMacros',GraphGuid=99DBFD5540A796041F72A5A9DA655026)
   ResolvedWildcardType=(PinCategory="object",PinSubCategoryObject=Class'/Script/Engine.Actor',bIsArray=True)
   Pins(0)=EdGraphPin'EdGraphPin_4479'
   Pins(1)=EdGraphPin'EdGraphPin_4480'
   Pins(2)=EdGraphPin'EdGraphPin_4481'
   Pins(3)=EdGraphPin'EdGraphPin_4482'
   Pins(4)=EdGraphPin'EdGraphPin_4483'
   Pins(5)=EdGraphPin'EdGraphPin_4484'
   NodePosX=320
   NodePosY=240
   NodeGuid=92C454FE406F9F31E53467B20B6D5563
End Object
Begin Object Class=K2Node_VariableGet Name="K2Node_VariableGet_101"
   Begin Object Class=EdGraphPin Name="EdGraphPin_4400"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_4399"
   End Object
   Begin Object Name="EdGraphPin_4400"
      PinName="self"
      PinFriendlyName="Target"
      PinType=(PinCategory="object",PinSubCategoryObject=BlueprintGeneratedClass'/Game/Blueprints/TriggerPush.TriggerPush_C')
      bHidden=True
   End Object
   Begin Object Name="EdGraphPin_4399"
      PinName="Speed"
      Direction=EGPD_Output
      PinType=(PinCategory="float")
      DefaultValue="0.0"
      AutogeneratedDefaultValue="0.0"
      LinkedTo(0)=EdGraphPin'K2Node_CommutativeAssociativeBinaryOperator_50.EdGraphPin_15449'
   End Object
   VariableReference=(MemberName="Speed",bSelfContext=True)
   Pins(0)=EdGraphPin'EdGraphPin_4399'
   Pins(1)=EdGraphPin'EdGraphPin_4400'
   NodePosX=32
   NodePosY=560
   NodeGuid=36A6B5C240E72A72270C6992A693F11D
End Object
Begin Object Class=K2Node_CallFunction Name="K2Node_CallFunction_2169"
   Begin Object Class=EdGraphPin Name="EdGraphPin_4406"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_4405"
   End Object
   Begin Object Name="EdGraphPin_4406"
      PinName="ReturnValue"
      PinToolTip="Return Value
Rotator "
      Direction=EGPD_Output
      PinType=(PinCategory="struct",PinSubCategoryObject=ScriptStruct'/Script/CoreUObject.Object:Rotator')
      DefaultValue="0, 0, 0"
      AutogeneratedDefaultValue="0, 0, 0"
      LinkedTo(0)=EdGraphPin'K2Node_CallFunction_2170.EdGraphPin_4412'
   End Object
   Begin Object Name="EdGraphPin_4405"
      PinName="self"
      PinFriendlyName="Target"
      PinToolTip="Target
Actor Reference"
      PinType=(PinCategory="object",PinSubCategoryObject=Class'/Script/Engine.Actor')
   End Object
   bIsPureFunc=True
   bIsConstFunc=True
   FunctionReference=(MemberName="K2_GetActorRotation",bSelfContext=True)
   Pins(0)=EdGraphPin'EdGraphPin_4405'
   Pins(1)=EdGraphPin'EdGraphPin_4406'
   NodePosX=112
   NodePosY=656
   NodeGuid=9C50425449D1C72229731EBEB6419E79
End Object
Begin Object Class=K2Node_CallFunction Name="K2Node_CallFunction_2170"
   Begin Object Class=EdGraphPin Name="EdGraphPin_4413"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_4412"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_4411"
   End Object
   Begin Object Name="EdGraphPin_4413"
      PinName="ReturnValue"
      PinToolTip="Return Value
Vector "
      Direction=EGPD_Output
      PinType=(PinCategory="struct",PinSubCategoryObject=ScriptStruct'/Script/CoreUObject.Object:Vector')
      DefaultValue="0, 0, 0"
      AutogeneratedDefaultValue="0, 0, 0"
      LinkedTo(0)=EdGraphPin'K2Node_CallFunction_2240.EdGraphPin_16126'
   End Object
   Begin Object Name="EdGraphPin_4412"
      PinName="InRot"
      PinToolTip="In Rot
Rotator "
      PinType=(PinCategory="struct",PinSubCategoryObject=ScriptStruct'/Script/CoreUObject.Object:Rotator')
      DefaultValue="0, 0, 0"
      AutogeneratedDefaultValue="0, 0, 0"
      LinkedTo(0)=EdGraphPin'K2Node_CallFunction_2169.EdGraphPin_4406'
   End Object
   Begin Object Name="EdGraphPin_4411"
      PinName="self"
      PinFriendlyName="Target"
      PinToolTip="Target
Kismet Math Library Reference"
      PinType=(PinCategory="object",PinSubCategoryObject=Class'/Script/Engine.KismetMathLibrary')
      DefaultObject=Default__KismetMathLibrary
      bHidden=True
   End Object
   bIsPureFunc=True
   FunctionReference=(MemberParentClass=Class'/Script/Engine.KismetMathLibrary',MemberName="GetForwardVector")
   Pins(0)=EdGraphPin'EdGraphPin_4411'
   Pins(1)=EdGraphPin'EdGraphPin_4412'
   Pins(2)=EdGraphPin'EdGraphPin_4413'
   NodePosX=368
   NodePosY=672
   NodeGuid=F4811F3C4FF344D179982897F363B251
End Object
Begin Object Class=K2Node_CallFunction Name="K2Node_CallFunction_2442"
   Begin Object Class=EdGraphPin Name="EdGraphPin_4437"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_4436"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_4435"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_4434"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_4433"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_4432"
   End Object
   Begin Object Name="EdGraphPin_4437"
      PinName="SweepHitResult"
      PinToolTip="Sweep Hit Result
Hit Result Structure

The hit result from the move if swept."
      Direction=EGPD_Output
      PinType=(PinCategory="struct",PinSubCategoryObject=ScriptStruct'/Script/Engine.EngineTypes:HitResult')
   End Object
   Begin Object Name="EdGraphPin_4436"
      PinName="bSweep"
      PinToolTip="Sweep
Boolean

Whether to sweep to the destination location, triggering overlaps along the way and stopping at the first blocking hit."
      PinType=(PinCategory="bool")
      DefaultValue="false"
      AutogeneratedDefaultValue="false"
   End Object
   Begin Object Name="EdGraphPin_4435"
      PinName="DeltaLocation"
      PinToolTip="Delta Location
Vector 

The change in location."
      PinType=(PinCategory="struct",PinSubCategoryObject=ScriptStruct'/Script/CoreUObject.Object:Vector')
      DefaultValue="0, 0, 0"
      AutogeneratedDefaultValue="0, 0, 0"
      LinkedTo(0)=EdGraphPin'K2Node_CallFunction_2240.EdGraphPin_16128'
   End Object
   Begin Object Name="EdGraphPin_4434"
      PinName="self"
      PinFriendlyName="Target"
      PinToolTip="Target
Actor Reference"
      PinType=(PinCategory="object",PinSubCategoryObject=Class'/Script/Engine.Actor')
      LinkedTo(0)=EdGraphPin'K2Node_MacroInstance_27.EdGraphPin_4482'
   End Object
   Begin Object Name="EdGraphPin_4433"
      PinName="then"
      Direction=EGPD_Output
      PinType=(PinCategory="exec")
   End Object
   Begin Object Name="EdGraphPin_4432"
      PinName="execute"
      PinType=(PinCategory="exec")
      LinkedTo(0)=EdGraphPin'K2Node_MacroInstance_27.EdGraphPin_4481'
   End Object
   FunctionReference=(MemberName="K2_AddActorWorldOffset",bSelfContext=True)
   Pins(0)=EdGraphPin'EdGraphPin_4432'
   Pins(1)=EdGraphPin'EdGraphPin_4433'
   Pins(2)=EdGraphPin'EdGraphPin_4434'
   Pins(3)=EdGraphPin'EdGraphPin_4435'
   Pins(4)=EdGraphPin'EdGraphPin_4436'
   Pins(5)=EdGraphPin'EdGraphPin_4437'
   NodePosX=560
   NodePosY=224
   NodeGuid=DC736897493E347DA7F313B61BAD4E05
End Object
Begin Object Class=K2Node_CommutativeAssociativeBinaryOperator Name="K2Node_CommutativeAssociativeBinaryOperator_50"
   Begin Object Class=EdGraphPin Name="EdGraphPin_15450"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_15449"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_15448"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_15447"
   End Object
   Begin Object Name="EdGraphPin_15450"
      PinName="ReturnValue"
      PinToolTip="Return Value
Float"
      Direction=EGPD_Output
      PinType=(PinCategory="float")
      DefaultValue="0.0"
      AutogeneratedDefaultValue="0.0"
      LinkedTo(0)=EdGraphPin'K2Node_CallFunction_2240.EdGraphPin_16127'
   End Object
   Begin Object Name="EdGraphPin_15449"
      PinName="B"
      PinToolTip="B
Float"
      PinType=(PinCategory="float")
      DefaultValue="0.0"
      AutogeneratedDefaultValue="0.0"
      LinkedTo(0)=EdGraphPin'K2Node_VariableGet_101.EdGraphPin_4399'
   End Object
   Begin Object Name="EdGraphPin_15448"
      PinName="A"
      PinToolTip="A
Float"
      PinType=(PinCategory="float")
      DefaultValue="0.0"
      AutogeneratedDefaultValue="0.0"
      LinkedTo(0)=EdGraphPin'K2Node_Event_144.EdGraphPin_4363'
   End Object
   Begin Object Name="EdGraphPin_15447"
      PinName="self"
      PinFriendlyName="Target"
      PinToolTip="Target
Kismet Math Library Reference"
      PinType=(PinCategory="object",PinSubCategoryObject=Class'/Script/Engine.KismetMathLibrary')
      DefaultObject=Default__KismetMathLibrary
      bHidden=True
   End Object
   bIsPureFunc=True
   FunctionReference=(MemberParentClass=Class'/Script/Engine.KismetMathLibrary',MemberName="Multiply_FloatFloat")
   Pins(0)=EdGraphPin'EdGraphPin_15447'
   Pins(1)=EdGraphPin'EdGraphPin_15448'
   Pins(2)=EdGraphPin'EdGraphPin_15449'
   Pins(3)=EdGraphPin'EdGraphPin_15450'
   NodePosX=256
   NodePosY=512
   NodeGuid=22EAA0624CC01F6EEA1FDDB44155FED0
End Object
Begin Object Class=K2Node_CallFunction Name="K2Node_CallFunction_2240"
   Begin Object Class=EdGraphPin Name="EdGraphPin_16128"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_16127"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_16126"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_16125"
   End Object
   Begin Object Name="EdGraphPin_16128"
      PinName="ReturnValue"
      PinToolTip="Return Value
Vector "
      Direction=EGPD_Output
      PinType=(PinCategory="struct",PinSubCategoryObject=ScriptStruct'/Script/CoreUObject.Object:Vector')
      DefaultValue="0, 0, 0"
      AutogeneratedDefaultValue="0, 0, 0"
      LinkedTo(0)=EdGraphPin'K2Node_CallFunction_2442.EdGraphPin_4435'
   End Object
   Begin Object Name="EdGraphPin_16127"
      PinName="B"
      PinToolTip="B
Float"
      PinType=(PinCategory="float")
      DefaultValue="0.0"
      AutogeneratedDefaultValue="0.0"
      LinkedTo(0)=EdGraphPin'K2Node_CommutativeAssociativeBinaryOperator_50.EdGraphPin_15450'
   End Object
   Begin Object Name="EdGraphPin_16126"
      PinName="A"
      PinToolTip="A
Vector "
      PinType=(PinCategory="struct",PinSubCategoryObject=ScriptStruct'/Script/CoreUObject.Object:Vector')
      DefaultValue="0, 0, 0"
      AutogeneratedDefaultValue="0, 0, 0"
      LinkedTo(0)=EdGraphPin'K2Node_CallFunction_2170.EdGraphPin_4413'
   End Object
   Begin Object Name="EdGraphPin_16125"
      PinName="self"
      PinFriendlyName="Target"
      PinToolTip="Target
Kismet Math Library Reference"
      PinType=(PinCategory="object",PinSubCategoryObject=Class'/Script/Engine.KismetMathLibrary')
      DefaultObject=Default__KismetMathLibrary
      bHidden=True
   End Object
   bIsPureFunc=True
   FunctionReference=(MemberParentClass=Class'/Script/Engine.KismetMathLibrary',MemberName="Multiply_VectorFloat")
   Pins(0)=EdGraphPin'EdGraphPin_16125'
   Pins(1)=EdGraphPin'EdGraphPin_16126'
   Pins(2)=EdGraphPin'EdGraphPin_16127'
   Pins(3)=EdGraphPin'EdGraphPin_16128'
   NodePosX=464
   NodePosY=512
   NodeGuid=36AB1E284B16C2738001E684D6E8CFCE
End Object

Any help is appreciated!

#2

Just extend it past the conveyor belt a bit and you should get it. Or try boosting the speed of the conveyor belt and you will see objects get thrown a bit further depending on their weight and shape

#3

Thanks for the response ZoltanJr, but that’s not working in my scenario :frowning:

I’m currently trying to launch the object up into the air but it just stops on top of the volume, even with a high speed set.

Here is an example of what I’m working with:

I have tried adjusting the mass and the speed but I get around the same result. Any suggestions?

#4

Because this is just changing the actual position of the object it’s not actually imparting any momentum on it so yeah it wont continue to move. With the horizontal 1 once it moves outside of the zone then gravity kicks in and starts affecting the object. You will want to look at applying a thruster or a force to the object instead so that it’s a physical force moving it.

#5

Thanks for the response but I’m still struggling with this issue. Currently I have a trigger set that when a certain actor overlaps it, it can change the offset. I do not know how to use the add force into this equation though.

This is my current blueprint that changes the offset:

This is what I’d like to accomplish:

Am I on the right track by doing it this way?

I attempted to read about Add Radial Force Component but I’m not really sure where to go with it. I saw I could fire the impulse but I have no idea where to set the speed or direction.

Any help is appreciated!