3

// Importing mesh
bool importer(RTCScene &main_scene) {
    Assimp::Importer importer;
    const char * path = "model.obj";
    auto scene = importer.ReadFile(path, aiProcess_Triangulate
                               | aiProcess_GenSmoothNormals | aiProcess_FlipUVs | aiProcess_JoinIdenticalVertices);


    // Keeping the data here for now
    unsigned int num_of_vertices = 0;
    unsigned int num_of_faces = 0;

    if (!scene) {
        return false;
    }
    else {

        //int k;
        auto pmesh = scene -> mMeshes;
        auto mesh = *pmesh;

        auto num_of_mashes = scene -> mNumMeshes;
        auto meshes = scene -> mMeshes;
        for (; pmesh < meshes + num_of_mashes; pmesh++) {
            Buff.push_back(Buffer()); // creates buffer for each new mesh;
            auto k = Buff.size() - 1;
            auto geomID = rtcNewTriangleMesh(main_scene, RTC_GEOMETRY_STATIC, mesh->mNumFaces, mesh->mNumVertices);

            auto mesh = *pmesh;
            auto vertices = mesh->mVertices;
            num_of_vertices = mesh->mNumVertices;
            //auto num_of_faces = mesh->mNumFaces;
            Buff[Buff.size() - 1].vertices.insert(Buff[Buff.size() - 1].vertices.end(), vertices, vertices + num_of_vertices); // inserting vertices;
            //Buff[k].vertices.insert(Buff[k].vertices.end(), vertices, vertices + num_of_vertices); // inserting vertices;
            num_of_faces = mesh->mNumFaces;
            auto faces = mesh->mFaces;
            for (auto face = faces; face < faces + num_of_faces; face++) {
                auto idx = face->mIndices;
                auto p1 = vertices[idx[0]];
                auto p2 = vertices[idx[1]];
                auto p3 = vertices[idx[2]];
                Buff[Buff.size() - 1].indices.insert(Buff[Buff.size() - 1].indices.end(), idx, idx + 3); // inserting indices;
                printf("%u : {%.2f, %.2f, %.2f}, %u : {%.2f, %.2f, %.2f}, %u : {%.2f, %.2f, %.2f}\n",
                       idx[0], p1.x, p1.y, p1.z, idx[1], p2.x, p2.y, p2.z, idx[2], p3.x, p3.y, p3.z);
            }

            rtcSetBuffer(main_scene, geomID, RTC_VERTEX_BUFFER, Buff[Buff.size() - 1].vertices.data(), 0, sizeof(Buff[Buff.size() - 1].vertices[0]));
            rtcSetBuffer(main_scene, geomID, RTC_INDEX_BUFFER, Buff[Buff.size() - 1].indices.data(), 0, sizeof(Buff[Buff.size() - 1].indices[0]));
        }
    }
    return true;
}