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 # Sensor

 Last update: 16.07.2026 

<a id="compolyx.Sensor"></a>

### *class* compolyx.Sensor(graph, obj, parent=None)

Sensor object for measuring areas, prices, weights, and centers of gravity.

### Attributes

NameDescription[`Sensor.active`](compolyx.Sensor.active.md#compolyx.Sensor.active)Whether the sensor is computed on update or not.[`Sensor.area`](compolyx.Sensor.area.md#compolyx.Sensor.area)Area covered by all Entities of the Sensor.[`Sensor.center_of_gravity`](compolyx.Sensor.center_of_gravity.md#compolyx.Sensor.center_of_gravity)Center of Gravity over all Entities of the Sensor.[`Sensor.enabled`](compolyx.Sensor.enabled.md#compolyx.Sensor.enabled)Indicates whether the object is enabled.[`Sensor.entities`](compolyx.Sensor.entities.md#compolyx.Sensor.entities)Entities of the Sensor.[`Sensor.id`](compolyx.Sensor.id.md#compolyx.Sensor.id)ID of the object.[`Sensor.is_dict_item`](compolyx.Sensor.is_dict_item.md#compolyx.Sensor.is_dict_item)Indicates whether the object is an item in a dictionary.[`Sensor.is_list_item`](compolyx.Sensor.is_list_item.md#compolyx.Sensor.is_list_item)Indicates whether the object is an item of a list.[`Sensor.link_path`](compolyx.Sensor.link_path.md#compolyx.Sensor.link_path)Root path of the current node in the tree for links to this object.[`Sensor.locked`](compolyx.Sensor.locked.md#compolyx.Sensor.locked)Sensor cut was imported and cannot be changed.[`Sensor.modeling_ply_area`](compolyx.Sensor.modeling_ply_area.md#compolyx.Sensor.modeling_ply_area)Cumulated area of all modeling-plies involved.[`Sensor.name`](compolyx.Sensor.name.md#compolyx.Sensor.name)Name of the object.[`Sensor.parent`](compolyx.Sensor.parent.md#compolyx.Sensor.parent)Parent object in the tree.[`Sensor.price`](compolyx.Sensor.price.md#compolyx.Sensor.price)Price over all Entities of the Sensor.[`Sensor.production_ply_area`](compolyx.Sensor.production_ply_area.md#compolyx.Sensor.production_ply_area)Cumulated area of all production-plies involved.[`Sensor.root_path`](compolyx.Sensor.root_path.md#compolyx.Sensor.root_path)Root path of the current node in the tree.[`Sensor.sensor_type`](compolyx.Sensor.sensor_type.md#compolyx.Sensor.sensor_type)Sensor type.[`Sensor.status`](compolyx.Sensor.status.md#compolyx.Sensor.status)Status of the object.[`Sensor.status_changed`](compolyx.Sensor.status_changed.md#compolyx.Sensor.status_changed)Boolean flag which is set to true in C++ when up-to-date status of object changes.[`Sensor.uid`](compolyx.Sensor.uid.md#compolyx.Sensor.uid)UID of the object.[`Sensor.vertex`](compolyx.Sensor.vertex.md#compolyx.Sensor.vertex)Raises an error if the object has been removed from the graph.[`Sensor.weight`](compolyx.Sensor.weight.md#compolyx.Sensor.weight)Weight over all Entities of the Sensor.### Methods

NameDescription[`Sensor.add_entity`](compolyx.Sensor.add_entity.md#compolyx.Sensor.add_entity)(entity)Add entity to sensor.[`Sensor.clear_entities`](compolyx.Sensor.clear_entities.md#compolyx.Sensor.clear_entities)()Clear all entities of this sensor.[`Sensor.find_parent`](compolyx.Sensor.find_parent.md#compolyx.Sensor.find_parent)(type)Steps up the tree and returns the first parent with given type.[`Sensor.obj_exists`](compolyx.Sensor.obj_exists.md#compolyx.Sensor.obj_exists)()Checks if \_\_obj still references the c++ object (has not been reset to None by self.\_delete) and exists in the graph.[`Sensor.remove_entity`](compolyx.Sensor.remove_entity.md#compolyx.Sensor.remove_entity)(entity)Remove entity from sensor.[`Sensor.serialize`](compolyx.Sensor.serialize.md#compolyx.Sensor.serialize)()[`Sensor.serialize_name_and_id`](compolyx.Sensor.serialize_name_and_id.md#compolyx.Sensor.serialize_name_and_id)()Serializes the name and ID.[`Sensor.update`](compolyx.Sensor.update.md#compolyx.Sensor.update)()[`Sensor.visit`](compolyx.Sensor.visit.md#compolyx.Sensor.visit)(visitor)Walk through the tree and let the visitor perform action on every descendant node.