fbxTest.cpp

void getAssignMaterials(FbxMesh *pMesh)
{
    //参考: https://github.com/cyrillef/FBX-iOS-ImportScene/blob/master/ImportScene/DisplayMesh.cxx
    
    // MaterialAssignが1Mesh1Materialかどうかチェック
    bool isAllSame = true;
    for (int l = 0; l < pMesh->GetElementMaterialCount(); l++){
        FbxGeometryElementMaterial *matElement = pMesh->GetElementMaterial(l);
        if (matElement->GetMappingMode() == FbxGeometryElement::eByPolygon)
        {
            isAllSame = false;
            break;
        }
    }
    if (isAllSame){
        // allSameの場合、1Mesh 1Material    
        // IndexArraの0番目のMaterialIndexを使用する
        FbxGeometryElementMaterial *matElement = pMesh->GetElementMaterial(0);
        if (matElement->GetMappingMode() == FbxGeometryElement::eAllSame)
        {
            int matId = matElement->GetIndexArray().GetAt(0);
            FbxSurfaceMaterial *mat = pMesh->GetNode()->GetMaterial(matId);
            printNode(mat);
        }
    }else{
        //eByPolygonの場合は1poly1Material
        int polyCount = pMesh->GetPolygonCount();
        for (int i = 0; i < polyCount; i++)
        {
            for (int l = 0; l < pMesh->GetElementMaterialCount(); l++)
            {
                FbxGeometryElementMaterial *matElement = pMesh->GetElementMaterial(l);
                FbxSurfaceMaterial *mat = NULL;
                int matId = -1;
                matId = matElement->GetIndexArray().GetAt(i);
                mat = pMesh->GetNode()->GetMaterial(matId);
                printNode(mat);
            }
        }
    }
}

void fbxTest_02()
{
    char *fbxFile = "D:/cube.fbx";

    FbxManager *manager = FbxManager::Create();
    FbxIOSettings *ioSettings = FbxIOSettings::Create(manager, IOSROOT);
    FbxImporter *importer = FbxImporter::Create(manager, "");
    importer->Initialize(fbxFile, -1, manager->GetIOSettings());

    // Fbxにシーンをロード
    FbxScene *scene = FbxScene::Create(manager, "scene");
    importer->Import(scene);
    importer->Destroy();

    FbxNode *rootNode = scene->GetRootNode();
    FbxNode *cube = rootNode->GetChild(0);
    FbxMesh *mesh = cube->GetMesh();

    getAssignMaterials(mesh);
    
    manager->Destroy();
}