Heal Other Players Using OnComponentBeginOverlap

• Unreal Version: 5.0.0
• Template: Third Person
• Project Name: MyProject

In this example the player will create a sphere by holding the left mouse button and every character that overlaps the sphere will trigger their heal method. The characters healing will have their material pulsate green.This example is a little weird, character's don't actually have health that increases, but it has a lot of useful snippets that I think can help in the future or be extended.

Some of the things the code uses.

• UMaterialInstanceDynamic
• OnComponentBeginOverlap
• Cast to Character type
• SetScalarParameterValue
• SetWorldScale3D
• Update inputs

1. Add an input method. I added an Input action called Heal and bound it to the left mouse button. Edit->Project Settings->Input

2. Update the M_Male_Body Material to have an if statement. See image below Content/Mannequin/Character/Materials/M_Male_Body

3. Create A new material to use for the healing sphere or use whatever you want. I made a simple translucent material, see image below

4. Add other ThirdPersonCharacter Blueprints to your Scene. *Content->ThirdPersonCPP->Blueprints->ThirdPersonCharacter

5. After the code compiles add the sphere mesh and material to the player character.

6. Update the sphere's collision presets to only overlap Pawns.

Notable Line Changes

MyProjectCharacter.h

• lines 9-10
• lines 38-65

MyProjectCharacter.cpp

• lines 11-12
• lines 51-72
• lines 84-85
• lines 169-240

Helpful Links

• OnComponentBeginOverlap
• FComponentBeginOverlapSignature
• UMaterialInstanceDynamic
• GetMaterial
• UMaterialInterface
• SetScalarParameterValue
• Good thread on creating dynamic materials
• Good Thread on IsA
• IsA

Helpful Signatures

OnComponentBeginOverlap /Engine/Source/Runtime/Engine/Classes/Components/PrimitiveComponent.h Line 165

DECLARE_DYNAMIC_MULTICAST_SPARSE_DELEGATE_SixParams( FComponentBeginOverlapSignature, UPrimitiveComponent, OnComponentBeginOverlap, UPrimitiveComponent*, OverlappedComponent, AActor*, OtherActor, UPrimitiveComponent*, OtherComp, int32, OtherBodyIndex, bool, bFromSweep, const FHitResult &, SweepResult);

OnComponentEndOverlap /Engine/Source/Runtime/Engine/Classes/Components/PrimitiveComponent.h Line 167

DECLARE_DYNAMIC_MULTICAST_SPARSE_DELEGATE_FourParams( FComponentEndOverlapSignature, UPrimitiveComponent, OnComponentEndOverlap, UPrimitiveComponent*, OverlappedComponent, AActor*, OtherActor, UPrimitiveComponent*, OtherComp, int32, OtherBodyIndex);