How to use dynamic materials in c++?

anonymous_user_7b25a447 · January 20, 2015, 10:05pm

Hello community

I’m currently doing this to make changes to the material of my decal from c++ :

toAdd->Decal->SetDecalMaterial(Material);
auto dynamic = toAdd->CreateDynamicMaterialInstance();
dynamic->SetScalarParameterValue(TEXT(“Rotator”), FRandomStream().RandHelper(360));
dynamic->SetVectorParameterValue(“Color”, FLinearColor(0, 0, 1));

But it has no effect. What am I doing wrong ?

Thanks for your answers !

Shadowriver · January 20, 2015, 11:48pm

Just creating is not enouth, you need to set that instance as one currently active, so use CreateAndSetMaterialInstanceDynamic instead

CreateAndSetMaterialInstanceDynamicFromMaterial if you want to use 2nd argument

anonymous_user_7b25a447 · January 21, 2015, 1:18pm

The problem is that I want to use it with a decal. So I can’t use the function found in UPrimitiveComponent.

But you where right about setting the instance. So what I did is :

auto dynamic = toAdd->CreateDynamicMaterialInstance();
dynamic->SetScalarParameterValue(TEXT(“Rotator”), FRandomStream().RandHelper(360));
dynamic->SetVectorParameterValue(“Color”, FLinearColor(0, 0, 1));
toAdd->SetMaterial(0, dynamic);

Thank you