Unity 机器学习代理工具包 (ML-Agents) 是一个开源项目,它使游戏和模拟能够作为训练智能代理的环境。
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using NUnit.Framework;
using System;
using System.Linq;
using Unity.MLAgents.Actuators;
using Unity.MLAgents.Policies;
using UnityEngine;
using Unity.MLAgents.Sensors;
using Unity.MLAgents.Utils.Tests;
namespace Unity.MLAgents.Tests
{
public class StackingSensorTests
{
[SetUp]
public void SetUp()
{
if (Academy.IsInitialized)
{
Academy.Instance.Dispose();
}
Academy.Instance.AutomaticSteppingEnabled = false;
}
[Test]
public void TestCtor()
{
ISensor wrapped = new VectorSensor(4);
ISensor sensor = new StackingSensor(wrapped, 4);
Assert.AreEqual("StackingSensor_size4_VectorSensor_size4", sensor.GetName());
Assert.AreEqual(sensor.GetObservationSpec().Shape, new InplaceArray<int>(16));
}
[Test]
public void AssertStackingReset()
{
var agentGo1 = new GameObject("TestAgent");
var bp1 = agentGo1.AddComponent<BehaviorParameters>();
bp1.BrainParameters.NumStackedVectorObservations = 3;
bp1.BrainParameters.ActionSpec = ActionSpec.MakeContinuous(1);
var aca = Academy.Instance;
var agent1 = agentGo1.AddComponent<TestAgent>();
var policy = new TestPolicy();
agent1.SetPolicy(policy);
StackingSensor sensor = null;
foreach (ISensor s in agent1.sensors)
{
if (s is StackingSensor)
{
sensor = s as StackingSensor;
}
}
Assert.NotNull(sensor);
for (int i = 0; i < 20; i++)
{
agent1.RequestDecision();
aca.EnvironmentStep();
}
policy.OnRequestDecision = () => SensorTestHelper.CompareObservation(sensor, new[] { 18f, 19f, 21f });
agent1.EndEpisode();
SensorTestHelper.CompareObservation(sensor, new[] { 0f, 0f, 0f });
}
[Test]
public void TestVectorStacking()
{
VectorSensor wrapped = new VectorSensor(2);
ISensor sensor = new StackingSensor(wrapped, 3);
wrapped.AddObservation(new[] { 1f, 2f });
SensorTestHelper.CompareObservation(sensor, new[] { 0f, 0f, 0f, 0f, 1f, 2f });
sensor.Update();
wrapped.AddObservation(new[] { 3f, 4f });
SensorTestHelper.CompareObservation(sensor, new[] { 0f, 0f, 1f, 2f, 3f, 4f });
sensor.Update();
wrapped.AddObservation(new[] { 5f, 6f });
SensorTestHelper.CompareObservation(sensor, new[] { 1f, 2f, 3f, 4f, 5f, 6f });
sensor.Update();
wrapped.AddObservation(new[] { 7f, 8f });
SensorTestHelper.CompareObservation(sensor, new[] { 3f, 4f, 5f, 6f, 7f, 8f });
sensor.Update();
wrapped.AddObservation(new[] { 9f, 10f });
SensorTestHelper.CompareObservation(sensor, new[] { 5f, 6f, 7f, 8f, 9f, 10f });
// Check that if we don't call Update(), the same observations are produced
SensorTestHelper.CompareObservation(sensor, new[] { 5f, 6f, 7f, 8f, 9f, 10f });
}
[Test]
public void TestVectorStackingReset()
{
VectorSensor wrapped = new VectorSensor(2);
ISensor sensor = new StackingSensor(wrapped, 3);
wrapped.AddObservation(new[] { 1f, 2f });
SensorTestHelper.CompareObservation(sensor, new[] { 0f, 0f, 0f, 0f, 1f, 2f });
sensor.Update();
wrapped.AddObservation(new[] { 3f, 4f });
SensorTestHelper.CompareObservation(sensor, new[] { 0f, 0f, 1f, 2f, 3f, 4f });
sensor.Reset();
wrapped.AddObservation(new[] { 5f, 6f });
SensorTestHelper.CompareObservation(sensor, new[] { 0f, 0f, 0f, 0f, 5f, 6f });
}
class Dummy3DSensor : ISensor
{
public SensorCompressionType CompressionType = SensorCompressionType.PNG;
public int[] Mapping;
public ObservationSpec ObservationSpec;
public float[,,] CurrentObservation;
internal Dummy3DSensor()
{
}
public ObservationSpec GetObservationSpec()
{
return ObservationSpec;
}
public int Write(ObservationWriter writer)
{
for (var h = 0; h < ObservationSpec.Shape[0]; h++)
{
for (var w = 0; w < ObservationSpec.Shape[1]; w++)
{
for (var c = 0; c < ObservationSpec.Shape[2]; c++)
{
writer[h, w, c] = CurrentObservation[h, w, c];
}
}
}
return ObservationSpec.Shape[0] * ObservationSpec.Shape[1] * ObservationSpec.Shape[2];
}
public byte[] GetCompressedObservation()
{
var writer = new ObservationWriter();
var flattenedObservation = new float[ObservationSpec.Shape[0] * ObservationSpec.Shape[1] * ObservationSpec.Shape[2]];
writer.SetTarget(flattenedObservation, ObservationSpec.Shape, 0);
Write(writer);
byte[] bytes = Array.ConvertAll(flattenedObservation, (z) => (byte)z);
return bytes;
}
public void Update() { }
public void Reset() { }
public CompressionSpec GetCompressionSpec()
{
return new CompressionSpec(CompressionType, Mapping);
}
public string GetName()
{
return "Dummy";
}
}
[Test]
public void TestStackingMapping()
{
// Test grayscale stacked mapping with CameraSensor
var cameraSensor = new CameraSensor(new Camera(), 64, 64,
true, "grayscaleCamera", SensorCompressionType.PNG);
var stackedCameraSensor = new StackingSensor(cameraSensor, 2);
Assert.AreEqual(stackedCameraSensor.GetCompressionSpec().CompressedChannelMapping, new[] { 0, 0, 0, 1, 1, 1 });
// Test RGB stacked mapping with RenderTextureSensor
var renderTextureSensor = new RenderTextureSensor(new RenderTexture(24, 16, 0),
false, "renderTexture", SensorCompressionType.PNG);
var stackedRenderTextureSensor = new StackingSensor(renderTextureSensor, 2);
Assert.AreEqual(stackedRenderTextureSensor.GetCompressionSpec().CompressedChannelMapping, new[] { 0, 1, 2, 3, 4, 5 });
// Test mapping with number of layers not being multiple of 3
var dummySensor = new Dummy3DSensor();
dummySensor.ObservationSpec = ObservationSpec.Visual(2, 2, 4);
dummySensor.Mapping = new[] { 0, 1, 2, 3 };
var stackedDummySensor = new StackingSensor(dummySensor, 2);
Assert.AreEqual(stackedDummySensor.GetCompressionSpec().CompressedChannelMapping, new[] { 0, 1, 2, 3, -1, -1, 4, 5, 6, 7, -1, -1 });
// Test mapping with dummy layers that should be dropped
var paddedDummySensor = new Dummy3DSensor();
paddedDummySensor.ObservationSpec = ObservationSpec.Visual(2, 2, 4);
paddedDummySensor.Mapping = new[] { 0, 1, 2, 3, -1, -1 };
var stackedPaddedDummySensor = new StackingSensor(paddedDummySensor, 2);
Assert.AreEqual(stackedPaddedDummySensor.GetCompressionSpec().CompressedChannelMapping, new[] { 0, 1, 2, 3, -1, -1, 4, 5, 6, 7, -1, -1 });
}
[Test]
public void Test3DStacking()
{
var wrapped = new Dummy3DSensor();
wrapped.ObservationSpec = ObservationSpec.Visual(2, 1, 2);
var sensor = new StackingSensor(wrapped, 2);
// Check the stacking is on the last dimension
wrapped.CurrentObservation = new[, ,] { { { 1f, 2f } }, { { 3f, 4f } } };
SensorTestHelper.CompareObservation(sensor, new[, ,] { { { 0f, 0f, 1f, 2f } }, { { 0f, 0f, 3f, 4f } } });
sensor.Update();
wrapped.CurrentObservation = new[, ,] { { { 5f, 6f } }, { { 7f, 8f } } };
SensorTestHelper.CompareObservation(sensor, new[, ,] { { { 1f, 2f, 5f, 6f } }, { { 3f, 4f, 7f, 8f } } });
sensor.Update();
wrapped.CurrentObservation = new[, ,] { { { 9f, 10f } }, { { 11f, 12f } } };
SensorTestHelper.CompareObservation(sensor, new[, ,] { { { 5f, 6f, 9f, 10f } }, { { 7f, 8f, 11f, 12f } } });
// Check that if we don't call Update(), the same observations are produced
SensorTestHelper.CompareObservation(sensor, new[, ,] { { { 5f, 6f, 9f, 10f } }, { { 7f, 8f, 11f, 12f } } });
// Test reset
sensor.Reset();
wrapped.CurrentObservation = new[, ,] { { { 13f, 14f } }, { { 15f, 16f } } };
SensorTestHelper.CompareObservation(sensor, new[, ,] { { { 0f, 0f, 13f, 14f } }, { { 0f, 0f, 15f, 16f } } });
}
[Test]
public void TestStackedGetCompressedObservation()
{
var wrapped = new Dummy3DSensor();
wrapped.ObservationSpec = ObservationSpec.Visual(1, 1, 3);
var sensor = new StackingSensor(wrapped, 2);
wrapped.CurrentObservation = new[, ,] { { { 1f, 2f, 3f } } };
var expected1 = sensor.CreateEmptyPNG();
expected1 = expected1.Concat(Array.ConvertAll(new[] { 1f, 2f, 3f }, (z) => (byte)z)).ToArray();
Assert.AreEqual(sensor.GetCompressedObservation(), expected1);
sensor.Update();
wrapped.CurrentObservation = new[, ,] { { { 4f, 5f, 6f } } };
var expected2 = Array.ConvertAll(new[] { 1f, 2f, 3f, 4f, 5f, 6f }, (z) => (byte)z);
Assert.AreEqual(sensor.GetCompressedObservation(), expected2);
sensor.Update();
wrapped.CurrentObservation = new[, ,] { { { 7f, 8f, 9f } } };
var expected3 = Array.ConvertAll(new[] { 4f, 5f, 6f, 7f, 8f, 9f }, (z) => (byte)z);
Assert.AreEqual(sensor.GetCompressedObservation(), expected3);
// Test reset
sensor.Reset();
wrapped.CurrentObservation = new[, ,] { { { 10f, 11f, 12f } } };
var expected4 = sensor.CreateEmptyPNG();
expected4 = expected4.Concat(Array.ConvertAll(new[] { 10f, 11f, 12f }, (z) => (byte)z)).ToArray();
Assert.AreEqual(sensor.GetCompressedObservation(), expected4);
}
[Test]
public void TestStackingSensorBuiltInSensorType()
{
var dummySensor = new Dummy3DSensor();
dummySensor.ObservationSpec = ObservationSpec.Visual(2, 2, 4);
dummySensor.Mapping = new[] { 0, 1, 2, 3 };
var stackedDummySensor = new StackingSensor(dummySensor, 2);
Assert.AreEqual(stackedDummySensor.GetBuiltInSensorType(), BuiltInSensorType.Unknown);
var vectorSensor = new VectorSensor(4);
var stackedVectorSensor = new StackingSensor(vectorSensor, 4);
Assert.AreEqual(stackedVectorSensor.GetBuiltInSensorType(), BuiltInSensorType.VectorSensor);
}
}
}