/// <summary>
///得到ReflectionPoint节点,并加入child节点的子节点List中
/// </summary>
private void SetReflectionChildNode(Node fatherNode, Node reNode, Terrain ter, City cityBuilding, ReceiveBall rxBall, double rayBeamAngle, List <FrequencyBand> txFrequencyBand)
{
reNode.LayNum = fatherNode.LayNum + 1;
reNode.DiffractionNum = fatherNode.DiffractionNum;
reNode.IsReceiver = false;
reNode.UAN = rxBall.UAN;
reNode.RayTracingDistance = fatherNode.RayTracingDistance;
reNode.RayTracingDistance += reNode.DistanceToFrontNode;
reNode.RayIn = new RayInfo(fatherNode.Position, reNode.Position);
//当新节点的层数加绕射次数不小于4或者绕射次数大于2，说明该路径已经过三次反射（或两次反射一次绕射）或者两次绕射，舍弃并追踪下一条射线
//将该节点设为end
if ((reNode.DiffractionNum >= 2) || ((reNode.LayNum + reNode.DiffractionNum) >= 4))
{
reNode.IsEnd = true;
// reNode.NodeStyle = NodeStyle.FinalNode;
fatherNode.ChildNodes.Add(reNode);
}
//否则，递归调用该函数继续追踪射线
else
{
reNode.IsEnd = false;
fatherNode.ChildNodes.Add(reNode);
RayInfo ReflectionRay = reNode.RayIn.GetReflectionRay(reNode.ReflectionFace, reNode.Position);
PunctiformPath newPath = new PunctiformPath(ReflectionRay, ter);
newPath.SetPunctiformRayPathNodes(reNode, ter, rxBall, cityBuilding, rayBeamAngle, txFrequencyBand);
}
}