【Unity3D】Unity自带组件—完成第一人称人物控制

1.导入unity自带的Character Controllers包

　　

2.可以看到First Person Controller组件的构成

　　

　　Mouse Look() : 随鼠标的移动而使所属物体发生旋转

　　FPSInput Controller() : 控制物体的移动

3.同样的，我们为自己的模型添加以上四个组件

　　

　　其中Mouse Look() 中的Axes属性，是调整围绕的旋转轴

　　所谓第一人称就是，鼠标左右晃动则模型以X为轴进行旋转

　　鼠标上下晃动则模型的腰关节以Z轴进行旋转

4.找到模型的腰关节，同样添加Mouse Look()，Axes的值为Y，修改Mouse Look()

using UnityEngine;
using System.Collections;

/// MouseLook rotates the transform based on the mouse delta.
/// Minimum and Maximum values can be used to constrain the possible rotation

/// To make an FPS style character:
/// - Create a capsule.
/// - Add the MouseLook script to the capsule.
///   -> Set the mouse look to use LookX. (You want to only turn character but not tilt it)
/// - Add FPSInputController script to the capsule
///   -> A CharacterMotor and a CharacterController component will be automatically added.

/// - Create a camera. Make the camera a child of the capsule. Reset it's transform.
/// - Add a MouseLook script to the camera.
///   -> Set the mouse look to use LookY. (You want the camera to tilt up and down like a head. The character already turns.)
[AddComponentMenu("Camera-Control/Mouse Look")]
public class MouseLook : MonoBehaviour {

    public enum RotationAxes { MouseXAndY = 0, MouseX = 1, MouseY = 2 }
    public RotationAxes axes = RotationAxes.MouseXAndY;
    public float sensitivityX = 15F;
    public float sensitivityY = 15F;

    public float minimumX = -360F;
    public float maximumX = 360F;

    public float minimumY = -60F;
    public float maximumY = 60F;

    private Vector3 eulerAngles;

    float rotationY = 0F;

    void LateUpdate ()
    {
        if (axes == RotationAxes.MouseXAndY)
        {
            float rotationX = transform.localEulerAngles.y + Input.GetAxis("Mouse X") * sensitivityX;
            
            rotationY += Input.GetAxis("Mouse Y") * sensitivityY;
            rotationY = Mathf.Clamp (rotationY, minimumY, maximumY);
            
            transform.localEulerAngles = new Vector3(-rotationY, rotationX, 0);
        }
        else if (axes == RotationAxes.MouseX)
        {
            transform.Rotate(0, Input.GetAxis("Mouse X") * sensitivityX, 0);
        }
        else
        {
            rotationY += Input.GetAxis("Mouse Y") * sensitivityY;
            rotationY = Mathf.Clamp (rotationY, minimumY, maximumY);
            //----------********使Z轴旋转相应的鼠标偏移********----------//
            transform.localEulerAngles = new Vector3(eulerAngles.x,eulerAngles.y,eulerAngles.z + rotationY);
        }
    }
    
    void Start ()
    {
        // Make the rigid body not change rotation
        if (GetComponent<Rigidbody>())
            GetComponent<Rigidbody>().freezeRotation = true;
        //----------********获得初始的旋转********----------//
        eulerAngles = transform.localEulerAngles;
    }
}

　　上面代码中，值得注意的是LateUpdate()，原始的为Update()，因为模型默认会有动画在不停播放，

那么播放动画的Update()也会调用模型全身的骨骼，那么就会产生冲突，也就使腰部无法上下旋转。

所以将Update()改为LateUpdate()，后于动画播放的调用，即可。

　　此时就可以将Main camera添加在模型腰部组件下

　

模型的左右旋转、观察上下的视野就完成了。