Class VectorSensor

A sensor implementation for vector observations.

Inheritance
Object
VectorSensor
Inherited Members
Namespace: Unity.MLAgents.Sensors
Syntax
public class VectorSensor : ISensor

Constructors

VectorSensor(Int32, String)

Initializes the sensor.

Declaration
public VectorSensor(int observationSize, string name = null)
Parameters
Type Name Description
Int32 observationSize

Number of vector observations.
String name

Name of the sensor.

Methods

AddObservation(Boolean)

Adds a boolean observation to the vector observation of the agent.

Declaration
public void AddObservation(bool observation)
Parameters
Type Name Description
Boolean observation

Observation.

AddObservation(IEnumerable<Single>)

Adds a collection of float observations to the vector observations of the agent.

Declaration
public void AddObservation(IEnumerable<float> observation)
Parameters
Type Name Description
IEnumerable<Single> observation

Observation.

AddObservation(Int32)

Adds an integer observation to the vector observations of the agent.

Declaration
public void AddObservation(int observation)
Parameters
Type Name Description
Int32 observation

Observation.

AddObservation(Single)

Adds a float observation to the vector observations of the agent.

Declaration
public void AddObservation(float observation)
Parameters
Type Name Description
Single observation

Observation.

AddObservation(Quaternion)

Adds a quaternion observation to the vector observations of the agent.

Declaration
public void AddObservation(Quaternion observation)
Parameters
Type Name Description
Quaternion observation

Observation.

AddObservation(Vector2)

Adds an Vector2 observation to the vector observations of the agent.

Declaration
public void AddObservation(Vector2 observation)
Parameters
Type Name Description
Vector2 observation

Observation.

AddObservation(Vector3)

Adds an Vector3 observation to the vector observations of the agent.

Declaration
public void AddObservation(Vector3 observation)
Parameters
Type Name Description
Vector3 observation

Observation.

AddOneHotObservation(Int32, Int32)

Adds a one-hot encoding observation.

Declaration
public void AddOneHotObservation(int observation, int range)
Parameters
Type Name Description
Int32 observation

The index of this observation.
Int32 range

The max index for any observation.

GetCompressedObservation()

Return a compressed representation of the observation. For small observations, this should generally not be implemented. However, compressing large observations (such as visual results) can significantly improve model training time.

Declaration
public virtual byte[] GetCompressedObservation()
Returns
Type Description
Byte[]

Compressed observation.
Implements

GetCompressionType()

Return the compression type being used. If no compression is used, return None.

Declaration
public virtual SensorCompressionType GetCompressionType()
Returns
Type Description
SensorCompressionType

Compression type used by the sensor.
Implements

GetName()

Get the name of the sensor. This is used to ensure deterministic sorting of the sensors on an Agent, so the naming must be consistent across all sensors and agents.

Declaration
public string GetName()
Returns
Type Description
String

The name of the sensor.
Implements

GetObservationShape()

Returns the size of the observations that will be generated. For example, a sensor that observes the velocity of a rigid body (in 3D) would return new {3}. A sensor that returns an RGB image would return new [] {Height, Width, 3}

Declaration
public int[] GetObservationShape()
Returns
Type Description
Int32[]

Size of the observations that will be generated.
Implements

Reset()

Resets the internal state of the sensor. This is called at the end of an Agent's episode. Most implementations can leave this empty.

Declaration
public void Reset()
Implements

Update()

Update any internal state of the sensor. This is called once per each agent step.

Declaration
public void Update()
Implements

Write(ObservationWriter)

Write the observation data directly to the ObservationWriter. Note that this (and GetCompressedObservation()) may be called multiple times per agent step, so should not mutate any internal state.

Declaration
public int Write(ObservationWriter writer)
Parameters
Type Name Description
ObservationWriter writer

Where the observations will be written to.
Returns
Type Description
Int32

The number of elements written.
Implements

Extension Methods