void Object::calcNormals()
{
    for (unsigned int i = 0; i < Indices.size(); i += 3) {
        unsigned int Index0 = Indices[i];
        unsigned int Index1 = Indices[i + 1];
        unsigned int Index2 = Indices[i + 2];
        glm::vec3 v1 = Vertices[Index1].Pos - Vertices[Index0].Pos;
        glm::vec3 v2 = Vertices[Index2].Pos - Vertices[Index0].Pos;
        glm::vec3 Normal = glm::normalize(glm::cross(v2, v1));

        Vertices[Index0].Normal += Normal;
        Vertices[Index1].Normal += Normal;
        Vertices[Index2].Normal += Normal;
    }

    for (unsigned int i = 0; i < Vertices.size(); i++) {
        Vertices[i].Normal = glm::normalize(Vertices[i].Normal);
    }
}