unity3d之如何控制人物移动、旋转和动画播放

代码源自噩梦射手，记录一下方便后续使用，顺便将老师的解释给备注上去_(:з」∠)_

 using UnityEngine;
 using UnitySampleAssets.CrossPlatformInput;

 namespace CompleteProject
 {
     public class PlayerMovement : MonoBehaviour
     {
         public float speed = 6f;            // The speed that the player will move at.

         Vector3 movement;                   // The vector to store the direction of the player's movement.
         Animator anim;                      // Reference to the animator component.
         Rigidbody playerRigidbody;          // Reference to the player's rigidbody.
 #if !MOBILE_INPUT
         int floorMask;                      // A layer mask so that a ray can be cast just at gameobjects on the floor layer.
         float camRayLength = 100f;          // The length of the ray from the camera into the scene.
 #endif

         void Awake ()
         {
 #if !MOBILE_INPUT
             // Create a layer mask for the floor layer.
             floorMask = LayerMask.GetMask ("Floor");
 #endif

             // Set up references.
             anim = GetComponent <Animator> ();
             playerRigidbody = GetComponent <Rigidbody> ();
         }

         void FixedUpdate ()
         {
             // Store the input axes.
             float h = CrossPlatformInputManager.GetAxisRaw("Horizontal");
             float v = CrossPlatformInputManager.GetAxisRaw("Vertical");

             // Move the player around the scene.移动物体
             Move (h, v);

             // Turn the player to face the mouse cursor.转动物体
             Turning ();

             // Animate the player.动画物体
             Animating (h, v);
         }

         void Move (float h, float v)
         {
             // Set the movement vector based on the axis input.
             movement.Set (h, 0f, v);

             // Normalise the movement vector and make it proportional to the speed per second.
             //归一化，为了保持在不同cpu上，每秒走的速度是一样的
             movement = movement.normalized * speed * Time.deltaTime;

             // Move the player to it's current position plus the movement.
             playerRigidbody.MovePosition (transform.position + movement);
         }

         void Turning ()
         {
 #if !MOBILE_INPUT
             // Create a ray from the mouse cursor on screen in the direction of the camera.
        　　　　 //知道这一帧鼠标点在哪里
                //怎么从鼠标的屏幕空间点直接得到射线
             Ray camRay = Camera.main.ScreenPointToRay (Input.mousePosition);

             // Create a RaycastHit variable to store information about what was hit by the ray.
             RaycastHit floorHit;

             // Perform the raycast and if it hits something on the floor layer...
             if(Physics.Raycast (camRay, out floorHit, camRayLength, floorMask))
             {
                 // Create a vector from the player to the point on the floor the raycast from the mouse hit.
　　　　　　　　　　　　//得到一条从玩家到鼠标的有方向的射线
                 Vector3 playerToMouse = floorHit.point - transform.position;

                 // Ensure the vector is entirely along the floor plane.
                 playerToMouse.y = 0f;

                 // Create a quaternion (rotation) based on looking down the vector from the player to the mouse.
                    // 得到一个playerToMouse射线的四元数(四元数是啥可以百度一下)
                 Quaternion newRotatation = Quaternion.LookRotation (playerToMouse);

                 // Set the player's rotation to this new rotation.
　　　　　　　　　　　　//就可以将人物转向新的方向了
                 playerRigidbody.MoveRotation (newRotatation);
             }
 #else

             Vector3 turnDir = new Vector3(CrossPlatformInputManager.GetAxisRaw("Mouse X") , 0f , CrossPlatformInputManager.GetAxisRaw("Mouse Y"));

             if (turnDir != Vector3.zero)
             {
                 // Create a vector from the player to the point on the floor the raycast from the mouse hit.
                 Vector3 playerToMouse = (transform.position + turnDir) - transform.position;

                 // Ensure the vector is entirely along the floor plane.
                 playerToMouse.y = 0f;

                 // Create a quaternion (rotation) based on looking down the vector from the player to the mouse.
                 Quaternion newRotatation = Quaternion.LookRotation(playerToMouse);

                 // Set the player's rotation to this new rotation.
                 playerRigidbody.MoveRotation(newRotatation);
             }
 #endif
         }

         void Animating (float h, float v)
         {
             // Create a boolean that is true if either of the input axes is non-zero.
　　　　　　　　　// 创建一个布尔值判断键盘是否有输入值
             bool walking = h != 0f || v != 0f;

             // Tell the animator whether or not the player is walking.
　　　　　　　　　 //告诉animator人物是否在走动，walking为true时，玩家从静止动画到走动动画，为false反之
             anim.SetBool ("IsWalking", walking);
         }
     }
 }

玩家动画状态机设置

创建一个Animator Controller