Hey guys, I’m making a project for Android on Unreal to exhibit 3D models in a room. Right now Im working through a way to load models at runtime, so that I could fill a folder in Android with models and open any of them in the application. Im using Assimp to load the FBXs files (only format tested until now) and I already got the meshes from the model, now Im struggling to get the Material from that file (or at least import the texture so I can kludge something). I understand that Material is not strictly defined to 3D models in general, so there’s no direct way to import through assimp, so does anybody know how I can import this extra info from the model as a Material to Unreal at runtime?
Here’s my importer code until now:
bool UAssimpImporter::Load(const FString& FileDirectoryPath, const FString& FileName)
{
FString FilePath(FileDirectoryPath);
FilePath.Append(FileName);
// getting Model file
Assimp::Importer importer;
const aiScene* scene = importer.ReadFile(TCHAR_TO_ANSI(*FilePath),
aiProcess_CalcTangentSpace |
aiProcess_Triangulate |
aiProcess_JoinIdenticalVertices |
aiProcess_GenSmoothNormals |
aiProcess_FlipWindingOrder |
aiProcess_FlipUVs |
aiProcess_SortByPType );
if (!scene) return false;
// For each mesh
for (unsigned int i = 0; i < scene->mNumMeshes; i++)
{
aiMesh* currentMesh = scene->mMeshes[i];
for (unsigned int j = 0; j < currentMesh->mNumVertices; j++)
{
aiVector3D vertex = currentMesh->mVertices[j];
aiVector3D normal = currentMesh->mNormals[j];
aiVector3D uv = currentMesh->mTextureCoords[0][j];
Vertices.Add(FVector(vertex.x, vertex.y, vertex.z));
Normals.Add(FVector(normal.x, normal.y, normal.z));
UVs.Add(FVector2D(uv.x, uv.y));
}
for (unsigned int k = 0; k < currentMesh->mNumFaces; k++)
{
aiFace face = currentMesh->mFaces[k];
for (unsigned int l = 0; l < face.mNumIndices; l++)
{
Triangles.Add(face.mIndices[l]);
}
}
}
// Is scene contain materials ( Unless no special scene flags are set this will always be true )
if(scene->HasMaterials())
{
UE_LOG(LogTemp, Warning, TEXT("Has material"));
TArray<FString> Files;
// Excluding extension from filename, so I can search for texture with same name, different extension
FString NoExtName = FileName.LeftChop(FileName.Len() - FileName.Find(".", ESearchCase::IgnoreCase, ESearchDir::FromStart, 0));
// Fills 'Files' with the found files with name NoExtName.*
SearchFileName(Files, FileDirectoryPath, NoExtName);
for (unsigned int i = 0; i < scene->mNumMaterials; i++)
{
const aiMaterial* material = scene->mMaterials[i];
int texIndex = 0;
aiString path; // filename
if (material->GetTexture(aiTextureType_DIFFUSE, texIndex, &path) == AI_SUCCESS)
{
FString TextureName = path.data;
FString TexturePath(FileDirectoryPath);
TexturePath.Append(TextureName);
UE_LOG(LogTemp, Warning, TEXT("TexturePath: %s"), *TexturePath);
// Poorly attempt to load file, didn't think it was going to work anyway
Texture = Cast<UTexture>(StaticLoadObject(UTexture::StaticClass(), NULL, *(TexturePath)));
if (Texture)
{
UE_LOG(LogTemp, Warning, TEXT("TEXTURA SHOW DE BOLA"));
}
}
}
}
return true;
}