[UE4]C++代码操作SplineMesh

转自：http://aigo.iteye.com/blog/2279503

void ARaceSpline::OnConstruction(const FTransform& Transform)
{
    for (int32 i = ; i < mSplineComponent->GetNumSplinePoints() - ; i++)
    {
        USplineMeshComponent* SplineMesh = ConstructObject<USplineMeshComponent>(USplineMeshComponent::StaticClass(), this);  

        SplineMesh->bCreatedByConstructionScript = true;
        SplineMesh->SetMobility(EComponentMobility::Movable);
        SplineMesh->AttachParent = mSplineComponent;  

        //Set the color!
        UMaterialInstanceDynamic* dynamicMat = UMaterialInstanceDynamic::Create(mSplineMeshMaterial, NULL);
        dynamicMat->SetVectorParameterValue(TEXT("Color"), FLinearColor(mSegments[i].mColor));  

        SplineMesh->bCastDynamicShadow = false;
        SplineMesh->SetStaticMesh(mGridMesh);
        SplineMesh->SetMaterial(, dynamicMat);  

        //Width of the mesh
        SplineMesh->SetStartScale(FVector2D(, ));
        SplineMesh->SetEndScale(FVector2D(, ));  

        FVector pointLocationStart, pointTangentStart, pointLocationEnd, pointTangentEnd;
        mSplineComponent->GetLocalLocationAndTangentAtSplinePoint(i, pointLocationStart, pointTangentStart);
        mSplineComponent->GetLocalLocationAndTangentAtSplinePoint(i + , pointLocationEnd, pointTangentEnd);  

        SplineMesh->SetStartAndEnd(pointLocationStart, pointTangentStart, pointLocationEnd, pointTangentEnd);
    }  

    RegisterAllComponents();
}