/// <summary>
/// 求绕射场场强，文档公式1
/// </summary>
public static EField GetDiffractionEField(EField RayEFieldAtDiffractionPoint, RayInfo ray, Face diffractionFace1, Face diffractionFace2, Point diffractionPoint, Point viewPoint, double frequence)
{
if ((RayEFieldAtDiffractionPoint == null) || (ray == null) || (diffractionFace1 == null) || (diffractionFace2 == null) ||
(diffractionPoint == null) || (viewPoint == null))
{
throw new Exception("绕射场强计算输入的参数中有参数是null");
}
//
AdjacentEdge sameEdge = new AdjacentEdge(diffractionFace1, diffractionFace2); //获取劈边
double waveLength = 300.0 / frequence; //波长
Plural PluralOfVerticalEField = EField.GetVerticalE(RayEFieldAtDiffractionPoint, ray.RayVector, sameEdge.LineVector); //获得电场的垂直分量
Plural PluralOfHorizonalEField = EField.GetHorizonalE(RayEFieldAtDiffractionPoint, ray.RayVector, sameEdge.LineVector); //获得电场的水平分量
double Ad = GetSpreadFactor(ray.Origin, sameEdge, diffractionPoint, viewPoint, waveLength); //获得空间衰减的扩散因子
double k = 2 * Math.PI / waveLength; //波矢量
double s2 = diffractionPoint.GetDistance(viewPoint); //绕射点到观察点的距离
Plural ejks = new Plural(Math.Cos(k * s2), -Math.Sin(k * s2)); //exp(-jks)，相位
Plural verticalDiffractionFactor = GetDiffractionFactor(ray, diffractionFace1, diffractionFace2, sameEdge, diffractionPoint, viewPoint, waveLength, true);; //垂直极化波入射时的绕射系数D
Plural PluralOfVerticalDiffractionEField = Plural.PluralMultiplyDouble(PluralOfVerticalEField * verticalDiffractionFactor * ejks, Ad); //垂直极化波入射时的绕射场
Plural horizonalDiffractionFactor = GetDiffractionFactor(ray, diffractionFace1, diffractionFace2, sameEdge, diffractionPoint, viewPoint, waveLength, false);; //水平极化波入射时的绕射系数D
Plural PluralOfHorizonalDiffractionEField = Plural.PluralMultiplyDouble(horizonalDiffractionFactor * PluralOfHorizonalEField * ejks, Ad); //水平极化波入射时的绕射场
SpectVector vectorOfDiffractionRay = new SpectVector(diffractionPoint, viewPoint); //绕射波的方向
//垂直极化波绕射后的绕射场
SpectVector vectorOfVerticalDiffractionEField = GetVectorOfVerticalEField(vectorOfDiffractionRay, sameEdge.LineVector); //获得电场的垂直分量的方向
EField verticalDiffractionEField = GetXYZComponentOfTotalEField(PluralOfVerticalDiffractionEField, vectorOfVerticalDiffractionEField);
//水平极化波绕射后的绕射场
SpectVector vectorOfHorizonalDiffractionEField = GetVectorOfHorizonalEField(vectorOfDiffractionRay, sameEdge.LineVector); //获得电场的水平分量的方向
EField horizonalDiffractionEField = GetXYZComponentOfTotalEField(PluralOfHorizonalDiffractionEField, vectorOfHorizonalDiffractionEField);
EField diffractionEField = new EField(verticalDiffractionEField.X + horizonalDiffractionEField.X, verticalDiffractionEField.Y + horizonalDiffractionEField.Y, verticalDiffractionEField.Z + horizonalDiffractionEField.Z); //绕射场
return(diffractionEField);
}
//求反射电场强度的垂直分量
private static EField VerticalEfield(EField e, RayInfo rayIn, SpectVector l, double ReflectAngle, double Conduct, double Epara, double s1, double s2, double f)
{
Plural VEi = EField.GetVerticalE(e, rayIn.RayVector, l);
Plural V = VerticalReflectance(ReflectAngle, Conduct, f, Epara);
Plural A = new Plural(s1 / (s1 + s2));
Plural E = VEi * V * A * GetPhase(s1, s2, f);
EField Vefield = SpectVector.VectorDotMultiply(E, SpectVector.VectorCrossMultiply(rayIn.RayVector, l));
return(Vefield);
}
//求透射电场强度的垂直分量by Zhuo Liu 2015,3,24:
//private Efield GetVerticalEfield(Efield e, RayInfo rayIn, RayInfo rayOut, VectorInSpace lVector, double Conduct, double Epara, double inDistance, double outDistance, double inputFrequency)
public EField GetVerticalEfield()
{
//当入射波和相交面垂直时，求水平分量和垂直分量没有意义
if (rayIn.RayVector.IsParallelAndSamedirection(intersectionFace.NormalVector))
{
return(null);
}
//原static语句：double reflectAngle = SpectVector.VectorPhase(rayIn.RayVector, l);
Plural verticalOfE = e.GetVerticalE(rayIn.RayVector, verticalVector);
Plural vertiValue = GetVerticalRefractance();
Plural A = new Plural(inDistance / (inDistance + outDistance));
Plural E = verticalOfE * vertiValue * A * GetPhase();
// 原static语句：Efield Vefield = SpectVector .VectorDotMultiply (E, VectorInSpace.VectorCrossMultiply (rayIn .RayVector ,l ));
SpectVector tempVector = rayIn.RayVector.CrossMultiplied(verticalVector).GetNormalizationVector();
return(tempVector.DotMultiplied(E));
}
