Hi everyone, I want to be able to read the values from a material that uses the distanceToNearestSurfaceNode, to achieve this my logic is the following:
- Create mesh
- Attach mesh to Actor
- Pass material to that mesh
- Get texture from material
- Save texture data in memory
- Read texture data in an x / y position.
Im new to UE4, but reading the API and lots of forum posts I was able to get to step 4, however I haven’t find a way to save the UTexture to memory. I did find a way to save the data of an UTexture2D, but it didn’t work with my UTexture, so I think I’m missing a step somewhere.
My code is the following
.h
UStaticMeshComponent *DistanceField;
.cpp
Init()
{
DistanceField = NewObject<UStaticMeshComponent>(this, TEXT("Static Mesh"));
const ConstructorHelpers::FObjectFinder<UStaticMesh> MeshObj(TEXT("/Engine/BasicShapes/Cube"));
const ConstructorHelpers::FObjectFinder<UMaterial> MeshMat(TEXT("/Game/Textures/m_DistanceField.m_DistanceField"));
DistanceField->SetStaticMesh(MeshObj.Object);
DistanceField->SetRelativeScale3D(FVector(100.0f, 100.0f, 0.0f));
DistanceField->SetMaterial(0, MeshMat.Object);
DistanceField->AttachTo(RootComponent);
}
Tick()
{
//get mesh material textures
TArray <UTexture * > MyTextures;
DistanceField->GetUsedTextures(MyTextures, EMaterialQualityLevel::High);
//I think this is the missing step or something like this
UTexture2D *aTexture = MyTextures[0];
//save values in memory
FTexture2DMipMap * MyMipMap = &aTexture->PlatformData->Mips[0];
FByteBulkData * RawImageData = &MyMipMap->BulkData;
FColor* FormatedImageData = static_cast<FColor*>(RawImageData->Lock(LOCK_READ_ONLY));
//read pixel (actual)
uint8 PixelX = 5, PixelY = 10;
uint32 TextureWidth = MyMipMap->SizeX, TextureHeight = MyMipMap->SizeY;
FColor PixelColor;
if (PixelX >= 0 && PixelX < TextureWidth && PixelY >= 0 && PixelY < TextureHeight)
{
PixelColor = FormatedImageData[PixelY * TextureWidth + PixelX];
}
Thanks in advance