How to use the ursina.scene.entities function in ursina

def find_collision(self):
        self.collisions = list()
        self.collision = None
        if not self.raycast or self._pq.get_num_entries() == 0:
            self.unhover_everything_not_hit()
            return False

        self._pq.sortEntries()

        for entry in self._pq.getEntries():
            for entity in scene.entities:
                if entry.getIntoNodePath().parent == entity and entity.collision:
                    if entity.collision:
                        hit = HitInfo(
                            hit = entry.collided(),
                            entity = entity,
                            distance = distance(entry.getSurfacePoint(scene), camera.getPos()),
                            point = entry.getSurfacePoint(entity),
                            world_point = entry.getSurfacePoint(scene),
                            normal = entry.getSurfaceNormal(entity),
                            world_normal = entry.getSurfaceNormal(scene),
                            )
                        self.collisions.append(hit)
                        break

        if self.collisions:
            self.collision = self.collisions[0]

def unhover_everything_not_hit(self):
        for e in scene.entities:
            if e == self.hovered_entity:
                continue

            if e.hovered:
                e.hovered = False
                if hasattr(e, 'on_mouse_exit'):
                    e.on_mouse_exit()
                for s in e.scripts:
                    if hasattr(s, 'on_mouse_exit'):
                        s.on_mouse_exit()

def _destroy(entity):
    if not entity:
        print('entity is None')
        return
    if entity in scene.entities:
        scene.entities.remove(entity)

    if hasattr(entity, 'on_destroy'):
        entity.on_destroy()

    if hasattr(entity, 'scripts'):
        for s in entity.scripts:
            del s

    if hasattr(entity, 'animations'):
        for anim in entity.animations:
            anim.finish()
            anim.kill()

    if hasattr(entity, 'tooltip'):
        destroy(entity.tooltip)

self.collision = self.entries[0]
        nP = self.collision.get_into_node_path().parent
        point = self.collision.get_surface_point(nP)
        # point = Vec3(point[0], point[2], point[1])
        point = Vec3(point[0], point[1], point[2])
        world_point = self.collision.get_surface_point(render)
        # world_point = Vec3(world_point[0], world_point[2], world_point[1])
        world_point = Vec3(world_point[0], world_point[1], world_point[2])
        hit_dist = self.distance(self.world_position, world_point)

        if nP.name.endswith('.egg'):
            nP = nP.parent

        self.hit = HitInfo(hit=True)
        for e in scene.entities:
            if e == nP:
                # print('cast nP to Entity')
                self.hit.entity = e

        self.hit.point = point
        self.hit.world_point = world_point
        self.hit.distance = hit_dist

        normal = self.collision.get_surface_normal(self.collision.get_into_node_path().parent)
        # self.hit.normal = (normal[0], normal[2], normal[1])
        self.hit.normal = (normal[0], normal[1], normal[2])

        normal = self.collision.get_surface_normal(render)
        # self.hit.world_normal = (normal[0], normal[2], normal[1])
        self.hit.world_normal = (normal[0], normal[1], normal[2])
        return self.hit

def __init__(self, add_to_scene_entities=True, **kwargs):
        super().__init__(self.__class__.__name__)

        self.name = camel_to_snake(self.type)
        self.enabled = True     # disabled entities wil not be visible nor run code
        self.visible = True
        self.ignore = False     # if True, will not try to run code
        self.eternal = False    # eternal entities does not get destroyed on scene.clear()
        self.ignore_paused = False
        self.ignore_input = False

        self.parent = scene
        self.add_to_scene_entities = add_to_scene_entities # set to False to be ignored by the engine, but still get rendered.
        if add_to_scene_entities:
            scene.entities.append(self)

        self.model = None       # set model with model='model_name' (without file type extention)
        self.color = color.white
        self.texture = None     # set model with texture='texture_name'. requires a model to be set beforehand.
        self.reflection_map = scene.reflection_map
        self.reflectivity = 0
        self.render_queue = 0
        self.double_sided = False
        # self.always_on_top = False

        self.collision = False  # toggle collision without changing collider.
        self.collider = None    # set to 'box'/'sphere'/'mesh' for auto fitted collider.
        self.scripts = list()   # add with add_script(class_instance). will assign an 'entity' variable to the script.
        self.animations = list()
        self.hovered = False    # will return True if mouse hovers entity.

    def generate_cube_map(self, size=512, name=f'cube_map_{len(scene.entities)}'):
        from ursina import camera
        _name = 'textures/' + name
        org_pos = camera.position
        camera.position = self.position
        base.saveCubeMap(_name+'.jpg', size=size)
        camera.position = org_pos

        print('saved cube map:', name + '.jpg')
        self.model.setTexGen(TextureStage.getDefault(), TexGenAttrib.MWorldCubeMap)
        self.reflection_map = _name + '#.jpg'
        self.model.setTexture(loader.loadCubeMap(_name + '#.jpg'), 1)

self._pickerNode.addSolid(ray)


        if debug:
            self._pickerNP.show()
        else:
            self._pickerNP.hide()

        self._picker.traverse(traverse_target)

        if self._pq.get_num_entries() == 0:
            self.hit = HitInfo(hit=False)
            return self.hit

        ignore += tuple([e for e in scene.entities if not e.collision])

        self._pq.sort_entries()
        self.entries = [        # filter out ignored entities
            e for e in self._pq.getEntries()
            if e.get_into_node_path().parent not in ignore
            ]

        if len(self.entries) == 0:
            self.hit = HitInfo(hit=False)
            return self.hit

        self.collision = self.entries[0]
        nP = self.collision.get_into_node_path().parent
        point = self.collision.get_surface_point(nP)
        # point = Vec3(point[0], point[2], point[1])
        point = Vec3(point[0], point[1], point[2])

def display_mode(self, value):
        self._display_mode = value
        print('display mode:', value)
        base.wireframeOff()

        # disable collision display mode
        if hasattr(self, 'original_colors'):
            for i, e in enumerate([e for e in scene.entities if hasattr(e, 'color')]):
                e.color = self.original_colors[i]
                if e.collider:
                    e.collider.visible = False

        for e in [e for e in scene.entities if e.model and e.alpha]:
            e.setShaderAuto()

        if value == 'wireframe':
            base.wireframeOn()

        if value == 'colliders':
            self.original_colors = [e.color for e in scene.entities if hasattr(e, 'color')]
            for e in scene.entities:
                e.color = color.clear
                if e.collider:
                    # e.visible = False