IK还是一个很神奇和实用的东西啊，起码可以用代码来控制人物骨骼位置还是很爽的。因为不是动画师~

这篇可能跟Animator没啥关系了哈，都是代码层的。

看了一官方的案例，老的，有些问题，自己修改了一下，达到了效果。

官方建议把所有的IK操作放在OnAnimatorIK中进行。

如果我们要进行IK操作，先要绑定IK位置。IK能控制的官方都给了enum

 

然后我们要设置权重Weight，范围为0~1，这里都设成1

1             avatar.SetIKPositionWeight(AvatarIKGoal.LeftFoot, 1.0f);2             avatar.SetIKRotationWeight(AvatarIKGoal.LeftFoot, 1.0f);3             avatar.SetIKPositionWeight(AvatarIKGoal.LeftHand, 1.0f);4             avatar.SetIKRotationWeight(AvatarIKGoal.LeftHand, 1.0f);5             avatar.SetIKPositionWeight(AvatarIKGoal.RightFoot, 1.0f);6             avatar.SetIKRotationWeight(AvatarIKGoal.RightFoot, 1.0f);7             avatar.SetIKPositionWeight(AvatarIKGoal.RightHand, 1.0f);8             avatar.SetIKRotationWeight(AvatarIKGoal.RightHand, 1.0f);9             avatar.SetLookAtWeight(1.0f, 0.3f, 1.0f, 0.5f);

如果我们把LeftFoot的权重设为0，则会出现以下情况

在官方给的脚本中IK的绑定并没有在OnAnimatorIK中，而放到了Update中，然后就出现了绑定失败的问题。

所以我把他们都放到了OnAnimatorIK中。就可以了。

关于IK的操作~，给的少。

1     //设置右手IK位置2     avatar.SetIKPosition(AvatarIKGoal.RightHand, rightHandObj.position);3     //设置右手IK旋转4     avatar.SetIKRotation(AvatarIKGoal.RightHand, rightHandObj.rotation);5     //获取右手IK位置6     rightHandObj.position = avatar.GetIKPosition(AvatarIKGoal.RightHand);7     //获取右手IK旋转8     rightHandObj.rotation = avatar.GetIKRotation(AvatarIKGoal.RightHand);

上完整代码~ （ikActive）没开启时球跟随人，开启时人跟随球。

1 using UnityEngine;  2 using System.Collections;  3   4 public class MyIK : MonoBehaviour {  5   6     public Transform bodyObj = null;  7     public Transform leftFootObj = null;              8     public Transform rightFootObj = null;  9     public Transform leftHandObj = null; 10     public Transform rightHandObj = null; 11     public Transform lookAtObj = null; 12     private Animator avatar; 13     public bool ikActive = false; 14  15     void Start() 16     { 17         avatar = GetComponent
     
      (); 18     } 19  20     void OnAnimatorIK(int layerIndex) 21     { 22         if (avatar == null) return; 23  24         if (ikActive) 25         { 26             avatar.SetIKPositionWeight(AvatarIKGoal.LeftFoot, 0.0f); 27             avatar.SetIKRotationWeight(AvatarIKGoal.LeftFoot, 1.0f); 28             avatar.SetIKPositionWeight(AvatarIKGoal.LeftHand, 1.0f); 29             avatar.SetIKRotationWeight(AvatarIKGoal.LeftHand, 1.0f); 30             avatar.SetIKPositionWeight(AvatarIKGoal.RightFoot, 1.0f); 31             avatar.SetIKRotationWeight(AvatarIKGoal.RightFoot, 1.0f); 32             avatar.SetIKPositionWeight(AvatarIKGoal.RightHand, 1.0f); 33             avatar.SetIKRotationWeight(AvatarIKGoal.RightHand, 1.0f); 34             avatar.SetLookAtWeight(1.0f, 0.3f, 1.0f, 0.5f); 35  36             if (bodyObj != null) 37             { 38                 avatar.bodyPosition = bodyObj.position; 39                 avatar.bodyRotation = bodyObj.rotation; 40             } 41  42             if (leftHandObj != null) 43             { 44                 avatar.SetIKPosition(AvatarIKGoal.LeftHand, leftHandObj.position); 45                 avatar.SetIKRotation(AvatarIKGoal.LeftHand, leftHandObj.rotation); 46             } 47             if (rightFootObj != null) 48             { 49                 avatar.SetIKPosition(AvatarIKGoal.RightFoot, rightFootObj.position); 50                 avatar.SetIKRotation(AvatarIKGoal.RightFoot, rightFootObj.rotation); 51             } 52             if (leftFootObj != null) 53             { 54                 avatar.SetIKPosition(AvatarIKGoal.LeftFoot, leftFootObj.position); 55                 avatar.SetIKRotation(AvatarIKGoal.LeftFoot, leftFootObj.rotation); 56             } 57             if (rightHandObj != null) 58             { 59                 avatar.SetIKPosition(AvatarIKGoal.RightHand, rightHandObj.position); 60                 avatar.SetIKRotation(AvatarIKGoal.RightHand, rightHandObj.rotation); 61             } 62  63             if (lookAtObj != null) 64                 avatar.SetLookAtPosition(lookAtObj.position); 65         } 66         else 67         { 68             if (bodyObj != null) 69             { 70                 bodyObj.position = avatar.bodyPosition; 71                 bodyObj.rotation = avatar.bodyRotation; 72             } 73  74             if (leftFootObj != null) 75             { 76                 leftFootObj.position = avatar.GetIKPosition(AvatarIKGoal.LeftFoot); 77                 leftFootObj.rotation = avatar.GetIKRotation(AvatarIKGoal.LeftFoot); 78             } 79  80             if (rightFootObj != null) 81             { 82                 rightFootObj.position = avatar.GetIKPosition(AvatarIKGoal.RightFoot); 83                 rightFootObj.rotation = avatar.GetIKRotation(AvatarIKGoal.RightFoot); 84             } 85  86             if (leftHandObj != null) 87             { 88                 leftHandObj.position = avatar.GetIKPosition(AvatarIKGoal.LeftHand); 89                 leftHandObj.rotation = avatar.GetIKRotation(AvatarIKGoal.LeftHand); 90             } 91  92             if (rightHandObj != null) 93             { 94                 rightHandObj.position = avatar.GetIKPosition(AvatarIKGoal.RightHand); 95                 rightHandObj.rotation = avatar.GetIKRotation(AvatarIKGoal.RightHand); 96             } 97  98             if (lookAtObj != null) 99             {100                 lookAtObj.position = avatar.bodyPosition + avatar.bodyRotation * new Vector3(0, 0.5f, 1);101             }102             avatar.SetIKPositionWeight(AvatarIKGoal.LeftFoot, 0);103             avatar.SetIKRotationWeight(AvatarIKGoal.LeftFoot, 0);104             avatar.SetIKPositionWeight(AvatarIKGoal.LeftHand, 0);105             avatar.SetIKRotationWeight(AvatarIKGoal.LeftHand, 0);106             avatar.SetIKPositionWeight(AvatarIKGoal.RightFoot, 0);107             avatar.SetIKRotationWeight(AvatarIKGoal.RightFoot, 0);108             avatar.SetIKPositionWeight(AvatarIKGoal.RightHand, 0);109             avatar.SetIKRotationWeight(AvatarIKGoal.RightHand, 0);110             avatar.SetLookAtWeight(0.0f);111         }112     }113 114 }
     

附一个彩蛋，IK有意思~~呵呵~ o(*￣▽￣*)ブ