unity角色控制器修改（鼠标右键按住旋转视角）

using System;
using UnityEngine;
using UnityStandardAssets.CrossPlatformInput;
using UnityStandardAssets.Utility;
using Random = UnityEngine.Random;

namespace UnityStandardAssets.Characters.FirstPerson
{
    [RequireComponent(typeof (CharacterController))]
    [RequireComponent(typeof (AudioSource))]
    public class FirstPersonController : MonoBehaviour
    {
        [SerializeField]
        private bool m_IsWalking;
        public float m_WalkSpeed;
        [SerializeField]
        private float m_RunSpeed;
        [SerializeField]
        [Range(0f, 1f)]
        private float m_RunstepLenghten;
        [SerializeField]
        private float m_JumpSpeed;
        [SerializeField]
        private float m_StickToGroundForce;
        [SerializeField]
        private float m_GravityMultiplier;
        [SerializeField]
        private MouseLook m_MouseLook;
        [SerializeField]
        private bool m_UseFovKick;
        [SerializeField]
        private FOVKick m_FovKick = new FOVKick();
        [SerializeField]
        private bool m_UseHeadBob;
        [SerializeField]
        private CurveControlledBob m_HeadBob = new CurveControlledBob();
        [SerializeField]
        private LerpControlledBob m_JumpBob = new LerpControlledBob();
        [SerializeField]
        private float m_StepInterval;
        [SerializeField]
        private AudioClip[] m_FootstepSounds;    // an array of footstep sounds that will be randomly selected from.
        [SerializeField]
        private AudioClip m_JumpSound;           // the sound played when character leaves the ground.
        [SerializeField]
        private AudioClip m_LandSound;           // the sound played when character touches back on ground.

        private Camera m_Camera;
        private bool m_Jump;
        private float m_YRotation;
        private Vector2 m_Input;
        private Vector3 m_MoveDir = Vector3.zero;
        private CharacterController m_CharacterController;
        private CollisionFlags m_CollisionFlags;
        private bool m_PreviouslyGrounded;
        //private Vector3 m_OriginalCameraPosition;
        private float m_StepCycle;
        private float m_NextStep;
        private bool m_Jumping;
        private AudioSource m_AudioSource;

        // Use this for initialization
        private void Start()
        {
            m_CharacterController = GetComponent();
            m_Camera = Camera.main;
            //m_OriginalCameraPosition = m_Camera.transform.localPosition;
            m_FovKick.Setup(m_Camera);
            m_HeadBob.Setup(m_Camera, m_StepInterval);
            m_StepCycle = 0f;
            m_NextStep = m_StepCycle / 2f;
            m_Jumping = false;
            m_AudioSource = GetComponent();
            m_MouseLook.Init(transform, m_Camera.transform);
        }


        // Update is called once per frame
        private void Update()
        {
            RotateView();
            // the jump state needs to read here to make sure it is not missed
            if (!m_Jump)
            {
                m_Jump = CrossPlatformInputManager.GetButtonDown("Jump");
            }

            if (!m_PreviouslyGrounded && m_CharacterController.isGrounded)
            {
                StartCoroutine(m_JumpBob.DoBobCycle());
                PlayLandingSound();
                m_MoveDir.y = 0f;
                m_Jumping = false;
            }
            if (!m_CharacterController.isGrounded && !m_Jumping && m_PreviouslyGrounded)
            {
                m_MoveDir.y = 0f;
            }

            m_PreviouslyGrounded = m_CharacterController.isGrounded;
        }


        private void PlayLandingSound()
        {
            m_AudioSource.clip = m_LandSound;
            m_AudioSource.Play();
            m_NextStep = m_StepCycle + .5f;
        }


        private void LateUpdate()
        {
            float speed;
            GetInput(out speed);
            if (m_Input.x != 0 || m_Input.y != 0)
            {
                transform.GetChild(0).localPosition = new Vector3(0, 0.8f, 0);
            }
            // always move along the camera forward as it is the direction that it being aimed at
            Vector3 desiredMove = transform.forward * m_Input.y + transform.right * m_Input.x;

            // get a normal for the surface that is being touched to move along it
            RaycastHit hitInfo;
            Physics.SphereCast(transform.position, m_CharacterController.radius, Vector3.down, out hitInfo,
                               m_CharacterController.height / 2f, ~0, QueryTriggerInteraction.Ignore);
            desiredMove = Vector3.ProjectOnPlane(desiredMove, hitInfo.normal).normalized;

            m_MoveDir.x = desiredMove.x * speed;
            m_MoveDir.z = desiredMove.z * speed;


            if (m_CharacterController.isGrounded)
            {
                m_MoveDir.y = -m_StickToGroundForce;

                if (m_Jump)
                {
                    m_MoveDir.y = m_JumpSpeed;
                    PlayJumpSound();
                    m_Jump = false;
                    m_Jumping = true;
                }
            }
            else
            {
                m_MoveDir += Physics.gravity * m_GravityMultiplier * Time.fixedDeltaTime;
            }
            m_CollisionFlags = m_CharacterController.Move(m_MoveDir * Time.fixedDeltaTime);

            ProgressStepCycle(speed);
            UpdateCameraPosition(speed);

        }


        private void PlayJumpSound()
        {
            m_AudioSource.clip = m_JumpSound;
            m_AudioSource.Play();
        }


        private void ProgressStepCycle(float speed)
        {
            if (m_CharacterController.velocity.sqrMagnitude > 0 && (m_Input.x != 0 || m_Input.y != 0))
            {
                m_StepCycle += (m_CharacterController.velocity.magnitude + (speed * (m_IsWalking ? 1f : m_RunstepLenghten))) *
                             Time.fixedDeltaTime;
            }

            if (!(m_StepCycle > m_NextStep))
            {
                return;
            }

            m_NextStep = m_StepCycle + m_StepInterval;

            PlayFootStepAudio();
        }


        private void PlayFootStepAudio()
        {
            if (!m_CharacterController.isGrounded)
            {
                return;
            }
            // pick & play a random footstep sound from the array,
            // excluding sound at index 0
            int n = Random.Range(1, m_FootstepSounds.Length);
            m_AudioSource.clip = m_FootstepSounds[n];
            m_AudioSource.PlayOneShot(m_AudioSource.clip);
            // move picked sound to index 0 so it's not picked next time
            m_FootstepSounds[n] = m_FootstepSounds[0];
            m_FootstepSounds[0] = m_AudioSource.clip;
        }


        private void UpdateCameraPosition(float speed)
        {
            //Vector3 newCameraPosition;
            //if (!m_UseHeadBob)
            //{
            //    return;
            //}
            //if (m_CharacterController.velocity.magnitude > 0 && m_CharacterController.isGrounded)
            //{
            //    m_Camera.transform.localPosition =
            //        m_HeadBob.DoHeadBob(m_CharacterController.velocity.magnitude +
            //                          (speed*(m_IsWalking ? 1f : m_RunstepLenghten)));
            //    newCameraPosition = m_Camera.transform.localPosition;
            //    newCameraPosition.y = m_Camera.transform.localPosition.y - m_JumpBob.Offset();
            //}
            //else
            //{
            //    newCameraPosition = m_Camera.transform.localPosition;
            //    newCameraPosition.y = m_OriginalCameraPosition.y - m_JumpBob.Offset();
            //}
            //m_Camera.transform.localPosition = newCameraPosition;
        }



        private void GetInput(out float speed)
        {
            // Read input
            float horizontal = CrossPlatformInputManager.GetAxis("Horizontal");
            float vertical = CrossPlatformInputManager.GetAxis("Vertical");

            bool waswalking = m_IsWalking;

#if !MOBILE_INPUT
            // On standalone builds, walk/run speed is modified by a key press.
            // keep track of whether or not the character is walking or running
            m_IsWalking = !Input.GetKey(KeyCode.LeftShift);
#endif
            // set the desired speed to be walking or running
            speed = m_IsWalking ? m_WalkSpeed : m_RunSpeed;
            m_Input = new Vector2(horizontal, vertical);

            // normalize input if it exceeds 1 in combined length:
            if (m_Input.sqrMagnitude > 1)
            {
                m_Input.Normalize();
            }

            // handle speed change to give an fov kick
            // only if the player is going to a run, is running and the fovkick is to be used
            if (m_IsWalking != waswalking && m_UseFovKick && m_CharacterController.velocity.sqrMagnitude > 0)
            {
                StopAllCoroutines();
                StartCoroutine(!m_IsWalking ? m_FovKick.FOVKickUp() : m_FovKick.FOVKickDown());
            }
        }


        private void RotateView()
        {
            m_MouseLook.LookRotation(transform, m_Camera.transform);
        }


        private void OnControllerColliderHit(ControllerColliderHit hit)
        {
            Rigidbody body = hit.collider.attachedRigidbody;
            //dont move the rigidbody if the character is on top of it
            if (m_CollisionFlags == CollisionFlags.Below)
            {
                return;
            }

            if (body == null || body.isKinematic)
            {
                return;
            }
            body.AddForceAtPosition(m_CharacterController.velocity * 0.1f, hit.point, ForceMode.Impulse);
        }
    }
}

using System;
using UnityEngine;
using UnityStandardAssets.CrossPlatformInput;

namespace UnityStandardAssets.Characters.FirstPerson
{
    [Serializable]
    public class MouseLook
    {
        public float XSensitivity = 2f;
        public float YSensitivity = 2f;
        public bool clampVerticalRotation = true;
        public float MinimumX = -90F;
        public float MaximumX = 90F;
        public bool smooth;
        public float smoothTime = 5f;


        //private Quaternion m_CharacterTargetRot;
        //private Quaternion m_CameraTargetRot;

        public void Init(Transform character, Transform camera)
        {
            //m_CharacterTargetRot = character.localRotation;
            //m_CameraTargetRot = camera.localRotation;
        }


        public void LookRotation(Transform character, Transform camera)
        {
            if (!Input.GetMouseButton(1))
                return;
            //float yRot = CrossPlatformInputManager.GetAxis("Mouse X") * XSensitivity;
            //float xRot = CrossPlatformInputManager.GetAxis("Mouse Y") * YSensitivity;

            //m_CharacterTargetRot *= Quaternion.Euler(0f, yRot, 0f);
            //m_CameraTargetRot *= Quaternion.Euler(-xRot, 0f, 0f);

            //if (clampVerticalRotation)
            //    m_CameraTargetRot = ClampRotationAroundXAxis(m_CameraTargetRot);

            //if (smooth)
            //{
            //    character.localRotation = Quaternion.Slerp(character.localRotation, m_CharacterTargetRot, smoothTime * Time.deltaTime);
            //    camera.localRotation = Quaternion.Slerp(camera.localRotation, m_CameraTargetRot, smoothTime * Time.deltaTime);
            //    Debug.Log("跳转旋转----------》》》》 X");
            //}
            //else
            //{
            //    character.localRotation = m_CharacterTargetRot;
            //    camera.localRotation = m_CameraTargetRot;
            //    Debug.Log("---------- ++++ Y");
            //}
            float yRot = Input.GetAxis("Mouse X") * XSensitivity;
            float xRot = Input.GetAxis("Mouse Y") * YSensitivity;
            Vector3 yEuler = character.localEulerAngles + new Vector3(0, yRot, 0);
            Vector3 xEuler = camera.localEulerAngles - new Vector3(xRot, 0, 0);
            xEuler = ClampRotate(xEuler);
            character.localEulerAngles = yEuler;
            camera.localEulerAngles = xEuler;
        }

        Vector3 ClampRotate(Vector3 rotate)
        {
            if (rotate.x < 180)
            {
                rotate.x = Mathf.Clamp(rotate.x, -45, 45);
            }
            else
            {
                rotate.x = Mathf.Clamp(rotate.x, 315, 360);
            }
            return rotate;
        }

        Quaternion ClampRotationAroundXAxis(Quaternion q)
        {
            q.x /= q.w;
            q.y /= q.w;
            q.z /= q.w;
            q.w = 1.0f;

            float angleX = 2.0f * Mathf.Rad2Deg * Mathf.Atan(q.x);

            angleX = Mathf.Clamp(angleX, MinimumX, MaximumX);

            q.x = Mathf.Tan(0.5f * Mathf.Deg2Rad * angleX);

            return q;
        }

    }
}