Assign material to a mesh in C++ not working

Development Rendering
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1

Hi,
I try to assign a material to a mesh, but it doesnt work (no material visible). Here is my code :

.h
UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = Default)
UMaterialInterface* TheMaterials;

.cpp
static ConstructorHelpers::FObjectFinder SphereVisualAsset(TEXT(“/Game/StarterContent/Shapes/Shape_Cube.Shape_Cube”));
UStaticMeshComponent* SphereVisual = CreateDefaultSubobject(FName(*s));
SphereVisual->SetStaticMesh(SphereVisualAsset.Object);
SphereVisual->SetMaterial(0, TheMaterials);

I set TheMaterials in the editor and I can confirm it’s not NULL.

2

If you restart editor does the selected material apper?

3

Apart from restarting the editor have you tried to set it in OnConstruct?

4

The problem you’ve having here is that you’re using the constructor. The variable, in the constructor, IS null, unless you set it in the constructor (which you should, to null - you should always initialise variables.)

To fix your problem, you need to move the SetMaterial line to a different function. Override either PostInitProperties (which is run after bp props have been loaded, I believe) or PostInitializeComponents and set the material there. Or OnConstruct as somebody else said.

You probably want to add a UPROPERTY variable for your sphere, too, if you haven’t, so you can easily access it in the other method.

5

I’ll resolve the issue to keep track of it

6

THANK YOU, this is exactly what I was facing. For any future Googlers, this is relevant to everything, including assigning a StaticMesh to your StaticMeshComponent programmatically