/*
* 修改：因为unity中绕某一轴（例如X轴，X轴指向自己）顺时针旋转为正角度，逆时针旋转为负角度，
* 所以改为verticalV = Vector3.Cross(axis, projV).normalized
* 其中要指出的是Vector3.Cross(a, b)相当于百度百科中叉乘的bxa
*/
//向量绕着某个平面的法线旋转角度 axis可以看作某个平面的法线
public static Vector3 RotateAroundAxis(Vector3 v, Vector3 axis, float angle)
{
Vector3 projV = PreDefScrp.ComputeProjection(axis, v); //投影向量
Vector3 verticalV = Vector3.Cross(axis, projV).normalized; //新得投影向量垂直于旧投影向量的向量，方向指向新向量
verticalV *= projV.magnitude * Mathf.Sin(angle * Mathf.Deg2Rad);
Vector3 sectionProjV = projV.normalized * projV.magnitude * Mathf.Cos(angle * Mathf.Deg2Rad);//旧投影向量的一截
Vector3 newProjV = verticalV + sectionProjV;
return(newProjV + (v - projV));
}
public void UIRecenterControl(Vector3 dir)
{
if (IsInLockAngle && IsFirstInLockAngle)
{
IsFirstInLockAngle = false;
return;
}
if (!IsInFocus)//重置UI位置，跟随鼠标点击
{
Vector3 yDir = PreDefScrp.ComputeProjection(Vector3.up, dir);
float angle = Vector3.Angle(OldUIDir, yDir);
//Debug.Log("角度" + angle);
if (!IsPointerEnterVideoPlayerUI)
{
if (angle <= 10)
{
if (SwitchVideoPlayerUIVisionCallback != null)
{
SwitchVideoPlayerUIVisionCallback();
}
}
else
{
if (ResetUIDirCallback != null)
{
ResetUIDirCallback();
}
}
OldUIDir = yDir;
}
else
{
Debug.Log("已经进入VideoPlayerUI，所以没法动态切换显影");
}
}
else //视角回正
{
if (!IsPointerEnterVideoPlayerUI && FocusCompleteCallback != null)
{
FocusCompleteCallback();
}
else
{
Debug.Log("已经进入VideoPlayerUI，所以没法视角调整");
}
}
}
void ResetUIDir()
{
Vector3 dir = Camera.main.transform.forward;
Vector3 yDir = PreDefScrp.ComputeProjection(Vector3.up, dir);
float angle = Vector3.Angle(OldUIDir, yDir);
if (angle > 2)
{
Vector3 valueDir = Vector3.Cross(Vector3.forward, yDir);
float valueAngle = Vector3.Angle(Vector3.forward, yDir);
Vector3 cToUVector = PreDefScrp.RotateAroundAxis(CameraToUIVector, valueDir, valueAngle);
this.transform.forward = yDir;
this.transform.position = Camera.main.transform.position + cToUVector;
OldUIDir = yDir;
}
}