automatically find free node numbers?

[LuMaul]

I would like to create several lines for my polygons via a for-loop. Is it possible to automatically find free node numbers for my “OFFSET” variable? For example, by checking all the node numbers already assigned in my model? Is there a more elegant way?

Reduced example code:

def to_rfem_nodes(polygon:Polygon) -> dict:
    OFFSET = 100 # To Do: automate available node nr recognition

    polygon_node_nrs_xy = dict(enumerate(polygon._xy, start=OFFSET))

    for node_nr, (x, y) in polygon_node_nrs_xy.items():
        Node(no=node_nr, coordinate_X=x, coordinate_Y=y)
        pass

    return polygon_node_nrs_xy


def to_rfem_lines(polygon:Polygon) -> dict:
    OFFSET = 100 # To Do: automate available node nr recognition

    node_nrs = list(to_rfem_nodes(polygon))
    start_end_node_nrs = list(zip(node_nrs, node_nrs[1:] + node_nrs[:1]))
    line_nrs_sta_end_node_nrs = dict(enumerate(start_end_node_nrs, start=OFFSET))

    for line_nr, (start_nr, end_nr) in line_nrs_sta_end_node_nrs.items():
        Line(no=line_nr, nodes_no=f'{start_nr} {end_nr}')
        pass

    return line_nrs_sta_end_node_nrs


for polygon in list_of_my_polygon_objects:
    to_rfem_lines(polygon)

My own created polygon class can be found here.

Thank you for your help!

[LuMaul]

Found the solution myself:

from RFEM.enums import ObjectTypes

def _get_max_obj_nr(obj_type:ObjectTypes) -> int:
    nrs = GetObjectNumbersByType(obj_type)
    nrs_arr = np.array(nrs).flatten()
    if not nrs_arr.size == 0:
        return int(max(nrs_arr)) + 1
    return 1

node_no_start = _get_max_obj_nr(ObjectTypes.E_OBJECT_TYPE_NODE)

Sometimes the GetObjectNumbersByType(obj_type) returns lists ins lists, e.g. [[val2, val2]] - thats why i used np.flatten().