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@EntityPreHook(EntityCondition.equals_entity_classname('player'), 'touch')
def Entity_StartTouch(args):
    entity = make_object(Entity, args[1]) #this is player
    try:
        touching = make_object(Entity, args[0])
    except:
        return
    if entity.classname == "worldspawn": print(entity.classname)
    if touching.classname == "worldspawn": print(touching.classname)

@OnTick
def _tick():
    for player in PlayerIter('alive'):
        if not player.flags & PlayerStates.ONGROUND:
        
            destination = Vector(player.origin[0],player.origin[1],player.origin[2]-1000)

            # Get a new trace instance
            trace = GameTrace()

            # Trace from the player's feet to the destination
            engine_trace.trace_ray(
                # This matches the player's bounding box from his feets to
                # the destination
                Ray(player.origin, destination, player.mins, player.maxs),

                # This collides with everything
                ContentMasks.ALL,

                # This ignore nothing but the player himself
                TraceFilterSimple((player,)),

                # The trace will contains the results
                trace
            )

            # If the trace did hit, that means there was obstruction along the way
            if trace.did_hit():
                if trace.end_position.get_distance(player.origin) >= 0 and trace.end_position.get_distance(player.origin) <= 10:
                # So the end of our trace becomes our destination
                    print('hit')

entity = Entity.from_inthandle(player.ground_entity)

from entities.entity import Entity
from entities.constants import WORLD_ENTITY_INDEX

def is_player_on_world(player):
    try:
        return Entity.from_inthandle(
            player.ground_entity).index == WORLD_ENTITY_INDEX
    except OverflowError:
        return False