/// <summary>
///进行射线追踪
/// </summary>
public List <Node> GetCrossNodes(Terrain ter, ReceiveBall rxBall, City buildings, double rayBeamAngle)
{
List <Rectangle> shadowRect = ter.lineRect(this.inRay); //记录射线在俯视图投影经过的矩形
Node crossWithTer = this.inRay.GetCrossNodeWithTerrainRects(shadowRect); //记录射线与地形交点、与源点距离、所在面
Node CrossWithReceive = rxBall.GetCrossNodeWithRxBall(this.inRay); //记录射线与接收球交点
Node CrossWithTerEdge = this.inRay.GetCrossNodeWithTerDiffractionEdge(shadowRect, this.fatherNode.RayTracingDistance, rayBeamAngle); //记录射线与地形绕射边的交点，绕射等信息
Node crossWithCity = buildings.GetReflectionNodeWithCity(this.inRay); //记录射线与建筑物交点、与源点距离、所在面
Node CrossWithCityEdge = buildings.GetDiffractionNodeWithBuildings(this.inRay, this.fatherNode.RayTracingDistance, rayBeamAngle); //记录射线与建筑物绕射边的交点，绕射等信息
//把所有交点放到一个list中
if (crossWithTer != null)
{
this.crossNodes.Add(crossWithTer);
}
if (CrossWithReceive != null)
{
this.crossNodes.Add(CrossWithReceive);
}
if (crossWithCity != null)
{
this.crossNodes.Add(crossWithCity);
}
if (CrossWithTerEdge != null)
{
this.crossNodes.Add(CrossWithTerEdge);
}
if (CrossWithCityEdge != null)
{
this.crossNodes.Add(CrossWithCityEdge);
}
if (crossNodes.Count == 0)
{
return(crossNodes);
}
else if (crossNodes.Count == 1)
{
return(new List <Node> {
this.crossNodes[0]
});
}
else
{
//若交点大于两个，排序
for (int i = 0; i < this.crossNodes.Count - 1; i++)
{
for (int j = i + 1; j < this.crossNodes.Count; j++)
{
if (this.crossNodes[j].DistanceToFrontNode > this.crossNodes[j + 1].DistanceToFrontNode)
{
Node param = this.crossNodes[j];
this.crossNodes[j] = this.crossNodes[j + 1];
this.crossNodes[j + 1] = param;
}
}
}
return(new List <Node> {
this.crossNodes[0]
});
}
}
/// <summary>
///求射线与地形,接收球,建筑物的交点,并将交点按照与源点距离进行排序
/// </summary>
/// <param name="oneRay">射线</param>
/// <param name="rxBall">接收球</param>
/// <param name="ter">地形</param>
/// <param name="cityBuilding">建筑物</param>
/// <param name="TxFrequencyBand">发射机频段信息</param>
/// <param name="multiple">绕射圆柱体半径倍数</param>
/// <returns>返回交点</returns>
private List <Node> GetCrossPointsWithEnvironment(ReceiveBall rxBall, Terrain ter, City cityBuilding, List <FrequencyBand> txFrequencyBand, double multiple)
{
Node crossWithTer = this.inRay.GetCrossNodeWithTerrainRects(this.terShadowRects); //记录射线与地形交点、与源点距离、所在面
Node CrossWithReceive = rxBall.GetCrossNodeWithRxBall(this.inRay); //记录射线与接收球交点
List <Node> CrossWithTerEdge = this.GetCrossNodeWithTerDiffractionEdge(txFrequencyBand, multiple); //记录射线与地形绕射边的交点，绕射等信息
Node crossWithCity = cityBuilding.GetReflectionNodeWithCity(this.inRay); //记录射线与建筑物交点、与源点距离、所在面
List <Node> CrossWithCityEdge = cityBuilding.GetDiffractionNodeWithCity(this.inRay, txFrequencyBand, multiple); //记录射线与建筑物绕射边的交点，绕射等信息
//把所有交点放到一个list中
List <Node> crossNodes = new List <Node> ();
if (crossWithTer != null)
{
crossNodes.Add(crossWithTer);
}
if (CrossWithReceive != null)
{
crossNodes.Add(CrossWithReceive);
}
if (crossWithCity != null)
{
crossNodes.Add(crossWithCity);
}
if (CrossWithTerEdge.Count != 0)
{
crossNodes.AddRange(CrossWithTerEdge);
}
if (CrossWithCityEdge.Count != 0)
{
crossNodes.AddRange(CrossWithCityEdge);
}
//
if (crossNodes.Count > 1)//若交点个数大于2，进行排序
{
for (int i = 0; i < crossNodes.Count - 1; i++)
{
for (int j = 0; j < crossNodes.Count - i - 1; j++)
{
if (crossNodes[j].DistanceToFrontNode > crossNodes[j + 1].DistanceToFrontNode)
{
Node param = crossNodes[j];
crossNodes[j] = crossNodes[j + 1];
crossNodes[j + 1] = param;
}
}
}
}
// this.DeleteSameNode(crossNodes);
return(crossNodes);
}