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 System.Collections.Generic;
using System;
namespace Unity.MLAgents.SideChannels
{
/// <summary>
/// Side channel that is comprised of a collection of float variables.
/// </summary>
public class FloatPropertiesChannel : SideChannel
{
Dictionary<string, float> m_FloatProperties = new Dictionary<string, float>();
Dictionary<string, Action<float>> m_RegisteredActions = new Dictionary<string, Action<float>>();
const string k_FloatPropertiesDefaultId = "60ccf7d0-4f7e-11ea-b238-784f4387d1f7";
/// <summary>
/// Initializes the side channel with the provided channel ID.
/// </summary>
/// <param name="channelId">ID for the side channel.</param>
public FloatPropertiesChannel(Guid channelId = default(Guid))
{
if (channelId == default(Guid))
{
ChannelId = new Guid(k_FloatPropertiesDefaultId);
}
else
{
ChannelId = channelId;
}
}
/// <inheritdoc/>
protected override void OnMessageReceived(IncomingMessage msg)
{
var key = msg.ReadString();
var value = msg.ReadFloat32();
m_FloatProperties[key] = value;
Action<float> action;
m_RegisteredActions.TryGetValue(key, out action);
action?.Invoke(value);
}
/// <summary>
/// Sets one of the float properties of the environment. This data will be sent to Python.
/// </summary>
/// <param name="key"> The string identifier of the property.</param>
/// <param name="value"> The float value of the property.</param>
public void Set(string key, float value)
{
m_FloatProperties[key] = value;
using (var msgOut = new OutgoingMessage())
{
msgOut.WriteString(key);
msgOut.WriteFloat32(value);
QueueMessageToSend(msgOut);
}
Action<float> action;
m_RegisteredActions.TryGetValue(key, out action);
action?.Invoke(value);
}
/// <summary>
/// Get an Environment property with a default value. If there is a value for this property,
/// it will be returned, otherwise, the default value will be returned.
/// </summary>
/// <param name="key"> The string identifier of the property.</param>
/// <param name="defaultValue"> The default value of the property.</param>
/// <returns></returns>
public float GetWithDefault(string key, float defaultValue)
{
float valueOut;
bool hasKey = m_FloatProperties.TryGetValue(key, out valueOut);
return hasKey ? valueOut : defaultValue;
}
/// <summary>
/// Registers an action to be performed everytime the property is changed.
/// </summary>
/// <param name="key"> The string identifier of the property.</param>
/// <param name="action"> The action that ill be performed. Takes a float as input.</param>
public void RegisterCallback(string key, Action<float> action)
{
m_RegisteredActions[key] = action;
}
/// <summary>
/// Returns a list of all the string identifiers of the properties currently present.
/// </summary>
/// <returns> The list of string identifiers </returns>
public IList<string> Keys()
{
return new List<string>(m_FloatProperties.Keys);
}
}
}