Node *XMLScene::getNodebyID(string id) {
	if (root->getId() == id) return root;

	for (vector<Node *>::iterator it = sceneNodes.begin(); it != sceneNodes.end(); it++ )
		if (id == (*it)->getId()) return (*it);

	Node * empty = new Node("empty");
	cout << "ERRO : o no " << id << " nao existe.\n";
	return empty;
}

void XMLScene::loadNode(Node *node) {
	if (node->getId() == "empty") return;

	glPushMatrix();
	glMultMatrixf(node->getTransforMatrix());

	map<string, CGFappearance *>::iterator it = appearanceMap.find(node->getAppearance());
	if (it != appearanceMap.end())
		it->second->apply();

	for (unsigned int i = 0; i < node->getPrimitives().size(); i++)
		node->getPrimitives()[i]->draw();

	for (unsigned int i = 0; i < node->getChildren().size(); i++) {
		loadNode(getNodebyID(node->getChildren()[i]));
	} glPopMatrix();
}