How can i assign static mesh to level like unreal editor with C++?

Development Asset Creation
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1

Hello!

I want to assign static mesh to level like unreal editor !

So, How do I write the source code with C++ ?

Please answer about my question.

Thank you :smiley:

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------------------------------------- ADD ---------------------------------------------------------------------

Add ++ that class is UObject … So, I can’t (). always value is “NULL”.

1 Like
2

Hey 4aries17
You could check the SpawnActor Function from the UWorld Class.
My Attempt would be:

UWorld* const World = ();
if (World)
{
    auto Actor = World->SpawnActor<AActorClass>(AActorClass::StaticClass());
    UStaticMeshComponent* ProjectileMesh = NewObject<UStaticMeshComponent>
                                            (Actor,
                                            UStaticMeshComponent::StaticClass());
    ProjectileMesh->RegisterComponent();
    Actor->RootComponent = ProjectileMesh;
    UStaticMesh* Projectile =  //... Some way to load meshes in runtime....//;
    if(Projectile)
        ProjectileMesh->SetStaticMesh(Projectile);
}

I never tried this code, but thats the only way I could think of doing something like this :slight_smile:
If the code doesn’t compile I will look into this again.

Good Luck

Greetings

3

Thank you !
I’ve tried . But I’m a Unreal novice.
I can not access RootComponet.

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Do you know perhaps for this reason?

4

When you drop asset on level it spawn actors and UE4 have ready actor to contain those asset in level, usally just containg component that handles that asset

5

Hey 4Aries
Sry I didn’t know that RootComponent is protected.
Instead of using Actor->RootComponent you use Actor->SetRootComponent(ProjectileMesh);

Greetings

6

Hey . Thats cool :slight_smile:
I didn’t know there were predefined Actors for this

7

Hello,
I wrote some code for you as example.

//Header

#pragma once

#include "Engine/StaticMeshActor.h"
#include "MyStaticMeshActor.generated.h"

UCLASS()
class *PUT_HERE_YOUR_PROJECT_API*_API AMyStaticMeshActor : public AStaticMeshActor
{
	GENERATED_BODY()
public:
	AMyStaticMeshActor();
};

// Source

#include "*PUT_HERE_YOUR_PROJECT_HEADER*.h"
#include "MyStaticMeshActor.h"

AMyStaticMeshActor::AMyStaticMeshActor()
{    
	UStaticMesh* StaticMeshTmp = LoadObject<UStaticMesh>(NULL, TEXT("/Engine/BasicShapes/Sphere.Sphere"));
	if(StaticMeshTmp != nullptr)
	{
		GetStaticMeshComponent()->Mobility = EComponentMobility::Movable;
		GetStaticMeshComponent()->SetStaticMesh(StaticMeshTmp);
	}
}

You can spawn this with AMyStaticMeshActor* MyNewACtor = ()->SpawnActor< AMyStaticMeshActor >();
Also it is possible to drag and drop from content browser.

I hope this was usefull for you.
.

1 Like
8

Note that maybe except BSP, everything needs to be an actor to be in the world. What you see in Overlay is definitly a actor

9

Thank you very much!
It’s very usefull to me!

But I don’t know where input a “AMyStaticMeshActor* MyNewACtor = ()->SpawnActor< AMyStaticMeshActor >();” this code.

And How can i Get a StaticMeshComponent ?
I don’t know that funtion logic “GetStaticMeshComponent()->”

Sorry to my code level …

4aries17.

10

Thank you,
But that class is UObject … So I can’t (). return value is “NULL”… allways …

So, Is there a way to spawn in UObject class? or Is there a way to () in UObject class ?

11

I am glad to hear my first answer was usefull. Don’t forget to mark the acceptable answer, this help to see solution without full story for people from google.

I believe at begining of learning the UE4 YourGameMode::BeginPlay is good place for spawning something, most of time spawning actors is totally up to you.