public void Update()
{
Vector2 circlePos = GetV2(_circlePosTrans);
//float rectX = _rect.x;
//float rectY = _rect.y;
//float rectWidth = _rect.width;
//float rectHeight = _rect.height;
//float circleX = circlePos.x;
//float circleY = circlePos.y;
//float nearestX = Mathf.Max(rectX, Mathf.Min(circleX, rectX + rectWidth));
//float nearestY = Mathf.Max(rectY, Mathf.Min(circleY, rectY + rectHeight));
//_nearestPos = new Vector2(nearestX, nearestY);
_nearestPos = Math2d.GetNearestRectPoint(circlePos, _rect);
_isOverlap = Math2d.IsCircleRectOverlap(circlePos, _radius, _rect);
_nearestPosTrans.position = new Vector3(_nearestPos.x, 0, _nearestPos.y);
}