Unity 无论角色低头抬头，始终保持朝着自身物体正前方向

角色低头抬头，始终保持朝着自身物体正前方向

public class Test : MonoBehaviour
{Vector3 v33;// Start is called before the first frame updatevoid Start(){if (transform.position.z==0){v33 = -Vector3.Cross(transform.right, Vector3.up);}else{Vector3 v3 = Vector3.Cross(transform.forward, Vector3.up);//v3.Normalize();v33 = -Vector3.Cross(v3, Vector3.up);}}// Update is called once per framevoid Update(){//transform.Translate(0,0,1/*,Space.World*/);transform.Translate(v33*Time.deltaTime,Space.World);}
}

向左向右，计算旋转角度

  var v = uiObjs["Camera (eye)"].transform.position - uiObjs["SK_BaoAn"].transform.position;//方//v.y = 0;var angle = Mathf.Acos(Vector3.Dot(v.normalized, uiObjs["SK_BaoAn"].transform.forward)) *     Mathf.Rad2Deg;//计算转的角度var s = Vector3.Cross(v, uiObjs["SK_BaoAn"].transform.forward);//向左转向右转angle *= s.y < 0 ? 1 : -1;Debug.Log(angle);uiObjs["SK_BaoAn"].transform.DORotate(new Vector3(0,angle,0), 1f);

物体正前方，平滑转动

  public void fn_showUI(Transform tf){Vector3 v3_1 = Vector3.Cross(tf.forward, Vector3.up);Vector3 v3_2 = Vector3.Cross(v3_1, Vector3.up).normalized;if (distance != 0) transform.position = tf.position - v3_2 * distance;transform.forward = -v3_2;//transform.position = Vector3.Lerp(transform.position, tf.position - v3_2 * distance,0.2f);}

地图小图标跟随VR相机视角角度

 private void Update() {Vector3 v3 = Vector3.Cross(eyes.forward, Vector3.up);v33 = Vector3.Cross(v3, Vector3.up);float dot = Vector3.Angle(-v33, Vector3.forward);//转的角度float dd = Vector3.Dot(-v33, Vector3.right);//判断向左向右if (dd < 0) {Debug.Log("向左"+ dot);point.eulerAngles = new Vector3(0, 0, dot);}else {Debug.Log("向右" + dot);point.eulerAngles = new Vector3(0, 0, -dot);}}

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