/// <summary>
///得到DiffractionPoint节点,并加入child节点的子节点List中
/// </summary>
/// <param name="fatherNode">父节点</param>
/// <param name="cylinderCrossNode">绕射相交点</param>
/// <param name="ter">地形</param>
/// <param name="reArea">态势区域</param>
/// <param name="cityBuilding">建筑物</param>
/// <param name="TxFrequencyBand">发射机频段信息</param>
/// <returns></returns>
private void SetDiffractionNode(Node fatherNode, Node cylinderCrossNode, Terrain ter, City cityBuilding, ReceiveArea reArea, List <FrequencyBand> txFrequencyBand)
{
Node diffractionNode = new Node();
diffractionNode.Position = cylinderCrossNode.DiffractionEdge.GetPedalPoint(cylinderCrossNode.Position);
//若求出的绕射点位置在绕射棱外部或者与绕射棱两个端点重合
if (!cylinderCrossNode.DiffractionEdge.JudgeIfPointInLineRange(diffractionNode.Position) ||
diffractionNode.Position.equal(cylinderCrossNode.DiffractionEdge.StartPoint) ||
diffractionNode.Position.equal(cylinderCrossNode.DiffractionEdge.EndPoint))
{
return;
}
else
{
diffractionNode.DiffractionEdge = cylinderCrossNode.DiffractionEdge;
diffractionNode.DisranceToEdge = cylinderCrossNode.DisranceToEdge;
diffractionNode.NodeStyle = NodeStyle.DiffractionNode;
diffractionNode.LayNum = fatherNode.LayNum;
diffractionNode.DiffractionNum = fatherNode.DiffractionNum + 1;
diffractionNode.IsReceiver = false;
diffractionNode.UAN = reArea.UAN;
diffractionNode.DistanceToFrontNode = diffractionNode.Position.GetDistance(fatherNode.Position);
diffractionNode.RayTracingDistance = fatherNode.RayTracingDistance;
diffractionNode.RayTracingDistance += diffractionNode.DistanceToFrontNode;
diffractionNode.RayIn = new RayInfo(fatherNode.Position, diffractionNode.Position);
if (fatherNode.tempNode == null)
{
fatherNode.ChildNodes.Add(diffractionNode);
}
else
{
// diffractionNode.DistanceToFrontNode = diffractionNode.Position.GetDistance(fatherNode.tempNode.Position);
fatherNode.tempNode.ChildNodes.Add(diffractionNode);
}
// diffractionNode.JudgeIfNodeIsInArea(ter,reArea);
//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,并将该节点设为end
//但是当该节点在态势区域内时，则继续追踪
if (((diffractionNode.DiffractionNum >= 2) || ((diffractionNode.LayNum + diffractionNode.DiffractionNum) >= 4)) && !diffractionNode.IsReceiver)
{
diffractionNode.IsEnd = true;
}
//否则继续追踪射线
else
{
diffractionNode.IsEnd = false;
List <RayInfo> DiffractionRays = Rays.GetDiffractionRays(fatherNode.Position, diffractionNode.Position, diffractionNode.DiffractionEdge, 12);
for (int i = 0; i < DiffractionRays.Count; i++)
{
//AreaPath areaPath = new AreaPath(DiffractionRays[i], ter, reArea);
//areaPath.SetAreaRayPathNodes(diffractionNode, ter, reArea, cityBuilding, txFrequencyBand);
}
}
}
}
/// <summary>
///得到DiffractionPoint节点,并加入child节点的子节点List中
/// </summary>
private void GetDiffractionNode(Node fatherNode, Node cylinderCrossNode, Terrain ter, City cityBuilding, ReceiveBall rxBall, double rayBeamAngle, List <FrequencyBand> txFrequencyBand)
{
Point diffractionPoint = new RayInfo(cylinderCrossNode.DiffractionEdge.StartPoint, cylinderCrossNode.DiffractionEdge.LineVector).GetFootPointWithSkewLine(this.inRay);
if (!cylinderCrossNode.DiffractionEdge.JudgeIfPointInLineRange(diffractionPoint))//若绕射点不在棱内
{
return;
}
else
{
List <Point> diffPostions = this.GetDiffractionNodePoistions(diffractionPoint, cylinderCrossNode.DiffractionEdge);
for (int i = 0; i < diffPostions.Count; i++)
{
Node diffractionNode = new Node();
diffractionNode.Position = diffPostions[i];
diffractionNode.DiffractionEdge = cylinderCrossNode.DiffractionEdge;
diffractionNode.DisranceToEdge = diffractionPoint.GetDistanceToLine(cylinderCrossNode.DiffractionEdge.StartPoint, cylinderCrossNode.DiffractionEdge.LineVector);
diffractionNode.NodeStyle = NodeStyle.DiffractionNode;
diffractionNode.LayNum = fatherNode.LayNum + 1;
diffractionNode.DiffractionNum = fatherNode.DiffractionNum + 1;
diffractionNode.IsReceiver = false;
diffractionNode.UAN = rxBall.UAN;
diffractionNode.DistanceToFrontNode = diffractionNode.Position.GetDistance(fatherNode.Position);
diffractionNode.RayTracingDistance = fatherNode.RayTracingDistance;
diffractionNode.RayTracingDistance += diffractionNode.DistanceToFrontNode;
diffractionNode.RayIn = new RayInfo(fatherNode.Position, diffractionNode.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 ((diffractionNode.DiffractionNum >= 2) || ((diffractionNode.LayNum + diffractionNode.DiffractionNum) >= 4))
{
diffractionNode.IsEnd = true;
}
//否则，递归调用该函数继续追踪射线
else
{
diffractionNode.IsEnd = false;
fatherNode.ChildNodes.Add(diffractionNode);
List <RayInfo> diffractionRays = Rays.GetDiffractionRays(fatherNode.Position, diffractionNode.Position, diffractionNode.DiffractionEdge, 36);//采用新的方法获得绕射射线
for (int j = 0; j < diffractionRays.Count; j++)
{
PunctiformPath newPath = new PunctiformPath(diffractionRays[j], ter);
newPath.SetPunctiformRayPathNodes(diffractionNode, ter, rxBall, cityBuilding, rayBeamAngle, txFrequencyBand);
}
}
}
}
}
/// <summary>
///根据绕射棱两侧的绕射射线生成绕射追踪模型
/// </summary>
/// <param name="fatherPoint">父节点</param>
/// <param name="leftRays">左侧的绕射射线</param>
/// <param name="rightRays">右侧的绕射射线</param>
/// <returns>绕射追踪模型</returns>
private List <IRayTracing> GetDiffractionRayFaces(Point diffractionPoint, AdjacentEdge diffractionEdge)
{
//绕射范围两个端点的位置
Point rightPoint = new RayInfo(diffractionPoint, diffractionEdge.EndPoint).GetPointOnRayVector(diffractionEdge.DiffCylinderRadius);
Point leftPoint = new RayInfo(diffractionPoint, diffractionEdge.StartPoint).GetPointOnRayVector(diffractionEdge.DiffCylinderRadius);
//将点转成节点
Node leftNode = this.GetDiffractionChildNode(this.fatherNode, leftPoint, diffractionEdge);
Node rightNode = this.GetDiffractionChildNode(this.fatherNode, rightPoint, diffractionEdge);
//求出左侧节点的绕射射线
List <RayInfo> leftRays = Rays.GetDiffractionRays(this.fatherNode.Position, leftPoint, diffractionEdge, 24);
List <IRayTracing> rayFaces = new List <IRayTracing>();
//根据左侧绕射射线生成射线模型
for (int i = 0; i < leftRays.Count; i++)
{
Point fatherFacePoint = new SpaceFace(diffractionEdge.StartPoint, leftRays[i].RayVector.CrossMultiplied(diffractionEdge.LineVector)).GetSubPointInFace(this.fatherNode.Position);
Point fatherMirrorPoint = new RayInfo(rightPoint, fatherFacePoint).GetPointOnRayVector(diffractionEdge.DiffCylinderRadius);
RayInfo rightRay = new RayInfo(rightPoint, new SpectVector(fatherMirrorPoint, rightPoint));
rayFaces.Add(new FaceRay(leftNode, rightNode, leftRays[i], rightRay));
}
return(rayFaces);
}