def create_pose_node(stereo_image_pair_id):
global session
global initial_node_set
global is_debug
node = Graph_Nodes()
node.stereo_image_pair_id = stereo_image_pair_id
node.node_type = 'pose'
session.add(node)
session.commit()
#if we're debugging, set the first node to global coordinates
if(is_debug and not initial_node_set):
initial_node_set = True
T = get_identity_transform()
filepath = save_global_transform(T, node)
node.global_transformation_filepath = filepath
session.commit()
return node
