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エラー文にある問題のスクリプトの中身を追記しました。両方は入らなかったので、片方だけですが念の為。

2021/09/03 17:49

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@@ -6,6 +6,8 @@
 コメントいただけたらすぐにでも返信いたしますので、どうぞよろしくお願いいたします。
+問題のスクリプトの内容も追記しておきますね。
 ### 発生している問題・エラーメッセージ
 Assets\ML-Agents\Examples\PushBlockWithInput\Scripts\PushBlockWithInputPlayerController.cs(1,33): error CS0234: The type or namespace name 'Input' does not exist in the namespace 'Unity.MLAgents.Extensions' (are you missing an assembly reference?)
@@ -28,6 +30,242 @@
+###スクリプトの内容
+（PushBlockWithInputPlayerController）
+using Unity.MLAgents.Extensions.Input;
+using UnityEngine;
+using UnityEngine.InputSystem;
+/// <summary>
+/// This class handles the input for the PushBlock Cube character in the PushBlock scene.
+/// Note that the only ML-Agents code here is the implementation of the <see cref="IInputActionAssetProvider"/>.
+/// The <see cref="InputActuatorComponent"/> looks for a component that implements that interface in order to
+/// rebind actions to virtual controllers when training agents or running inference.  This means that you can
+/// keep your input handling code separate from ML-Agents, and have your agent's action space defined by the
+/// actions defined in your project's <see cref="GetInputActionAsset"/>.
+///
+/// If you don't implement <see cref="IInputActionAssetProvider"/> the <see cref="InputActuatorComponent"/> will
+/// look for a <see cref="PlayerInput"/> component on the GameObject it live on.  It will rebind the actions of that
+/// instance of the asset.
+///
+/// It is important to note that if you have multiple components on the same GameObject handling input, you will
+/// need to share the instance of the generated C# <see cref="IInputActionCollection2"/> (named <see cref="m_PushBlockActions"/>
+/// here) in order to ensure that all of your actions are bound correctly for ml-agents training and inference.
+/// </summary>
+public class PushBlockWithInputPlayerController : MonoBehaviour, IInputActionAssetProvider
+{
+    PushBlockWithInputSettings m_PushBlockSettings;
+    public float JumpTime = 0.5f;
+    float m_JumpTimeRemaining;
+    Rigidbody m_PlayerRb; //cached on initialization
+    PushBlockActions m_PushBlockActions;
+    float m_JumpCoolDownStart;
+    void Awake()
+    {
+        m_PushBlockSettings = FindObjectOfType<PushBlockWithInputSettings>();
+        LazyInitializeActions();
+        // Cache the agent rigidbody
+        m_PlayerRb = GetComponent<Rigidbody>();
+    }
+    void LazyInitializeActions()
+    {
+        if (m_PushBlockActions != null)
+        {
+            return;
+        }
+        m_PushBlockActions = new PushBlockActions();
+        m_PushBlockActions.Enable();
+        // You can listen to C# events.
+        m_PushBlockActions.Movement.jump.performed += JumpOnperformed;
+    }
+    void JumpOnperformed(InputAction.CallbackContext callbackContext)
+    {
+        InnerJump(gameObject.transform);
+    }
+    void FixedUpdate()
+    {
+        // Or you can poll the action itself like we do here.
+        InnerMove(gameObject.transform, m_PushBlockActions.Movement.movement.ReadValue<Vector2>());
+        if (m_JumpTimeRemaining < 0)
+        {
+            m_PlayerRb.AddForce(-transform.up * (m_PushBlockSettings.agentJumpForce * 3), ForceMode.Acceleration);
+        }
+        m_JumpTimeRemaining -= Time.fixedDeltaTime;
+    }
+    void InnerJump(Transform t)
+    {
+        if (Time.realtimeSinceStartup - m_JumpCoolDownStart > m_PushBlockSettings.agentJumpCoolDown)
+        {
+            m_JumpTimeRemaining = JumpTime;
+            m_PlayerRb.AddForce(t.up * m_PushBlockSettings.agentJumpForce, ForceMode.VelocityChange);
+            m_JumpCoolDownStart = Time.realtimeSinceStartup;
+        }
+    }
+    void InnerMove(Transform t, Vector2 v)
+    {
+        var forward = CreateForwardVector(v);
+        var up = CreateUpVector(v);
+        var dirToGo = t.forward * forward;
+        var rotateDir = t.up * up;
+        t.Rotate(rotateDir, Time.deltaTime * 200f);
+        m_PlayerRb.AddForce(dirToGo * m_PushBlockSettings.agentRunSpeed,
+            ForceMode.VelocityChange);
+    }
+    static float CreateUpVector(Vector2 move)
+    {
+        return Mathf.Abs(move.x) > Mathf.Abs(move.y) ? move.x : 0f;
+    }
+    static float CreateForwardVector(Vector2 move)
+    {
+        return Mathf.Abs(move.y) > Mathf.Abs(move.x) ? move.y : 0f;
+    }
+    /// <summary>
+    /// This is the implementation of the <see cref="IInputActionAssetProvider"/> for this class.  We need
+    /// both the <see cref="GetInputActionAsset"/> and the <see cref="IInputActionCollection2"/> if you are
+    /// listening to C# events, Unity Events, or receiving Messages from the Input System Package as those callbacks
+    /// are set up through the generated <see cref="IInputActionCollection2"/>.
+    /// </summary>
+    /// <returns></returns>
+    public (InputActionAsset, IInputActionCollection2) GetInputActionAsset()
+    {
+        LazyInitializeActions();
+        return (m_PushBlockActions.asset, m_PushBlockActions);
+    }
+}
 ### 試したこと