static bool load_material(Scene *scn, Material *mat, const aiMaterial *aimat);
static SceneNode *load_node(Scene *scn, const aiScene *aiscn, unsigned int flags, const aiNode *ainode);
static bool load_material(Scene *scn, Material *mat, const aiMaterial *aimat);
static SceneNode *load_node(Scene *scn, const aiScene *aiscn, unsigned int flags, const aiNode *ainode);