public StructForMainSolution MainSolution(int n, double x0, double xn, double ksi)
{
StructForMainSolution structForMain = new StructForMainSolution();
structForMain.chart_pointV = new ChartPoint();
structForMain.chart_pointV.x = new List <double>();
structForMain.chart_pointV.Vx = new List <double>();
structForMain.chart_pointV2 = new ChartPoint();
structForMain.chart_pointV2.x = new List <double>();
structForMain.chart_pointV2.Vx = new List <double>();
double[] k = new double[n + 1];
double[] k2 = new double[2 * n + 1];
double[] f = new double[n];
double[] f2 = new double[2 * n + 1];
double[] q = new double[n];
double[] q2 = new double[2 * n + 1];
double[] diagonal1 = new double[n - 1];
double[] diagonal1_2 = new double[2 * n - 1];
double[] diagonal2 = new double[n];
double[] diagonal2_2 = new double[2 * n];
double[] diagonal3 = new double[n - 1];
double[] diagonal3_2 = new double[2 * n - 1];
double[] right_column = new double[n];
double[] right_column2 = new double[2 * n];
double h = (xn - x0) / n;
double h2 = h / 2;
MyFunctions myFunc = new MyFunctions();
for (int i = 0; i < n + 1; ++i)
{
structForMain.chart_pointV.x.Add(i * h);
}
for (int i = 0; i < 2 * n + 1; ++i)
{
structForMain.chart_pointV2.x.Add(i * h2);
}
for (int i = 1; i < n; ++i)
{
if (ksi >= (structForMain.chart_pointV.x[i] + 0.5 * h))
{
f[i] = myFunc.f1(structForMain.chart_pointV.x[i]);
q[i] = myFunc.q1(structForMain.chart_pointV.x[i]);
}
else if (ksi <= (structForMain.chart_pointV.x[i] - 0.5 * h))
{
f[i] = myFunc.f2(structForMain.chart_pointV.x[i]);
q[i] = myFunc.q2(structForMain.chart_pointV.x[i]);
}
else
{
f[i] = n * ((ksi - (structForMain.chart_pointV.x[i] - 0.5 * h)) * myFunc.f1(0.5 * ((structForMain.chart_pointV.x[i] - 0.5 * h) + ksi)) + ((structForMain.chart_pointV.x[i] + 0.5 * h) - ksi) * myFunc.f2(0.5 * (ksi + (structForMain.chart_pointV.x[i] + 0.5 * h))));
q[i] = n * ((ksi - (structForMain.chart_pointV.x[i] - 0.5 * h)) * myFunc.q1(0.5 * (ksi + (structForMain.chart_pointV.x[i] - 0.5 * h))) + ((structForMain.chart_pointV.x[i] + 0.5 * h) - ksi) * myFunc.q2(0.5 * ((structForMain.chart_pointV.x[i] + 0.5 * h) + ksi)));
}
if (ksi >= structForMain.chart_pointV.x[i])
{
k[i] = 2 * myFunc.k1(structForMain.chart_pointV.x[i]) * myFunc.k1(structForMain.chart_pointV.x[i - 1]) / (myFunc.k1(structForMain.chart_pointV.x[i - 1]) + myFunc.k1(structForMain.chart_pointV.x[i]));
}
else if (ksi <= structForMain.chart_pointV.x[i - 1])
{
k[i] = 2 * myFunc.k2(structForMain.chart_pointV.x[i - 1]) * myFunc.k2(structForMain.chart_pointV.x[i]) / (myFunc.k2(structForMain.chart_pointV.x[i - 1]) + myFunc.k2(structForMain.chart_pointV.x[i]));
}
else
{
k[i] = 2 * h * myFunc.k1(structForMain.chart_pointV.x[i - 1]) * myFunc.k1(ksi) * myFunc.k2(ksi) * myFunc.k2(structForMain.chart_pointV.x[i]) / ((ksi - structForMain.chart_pointV.x[i - 1]) * (myFunc.k1(ksi) + myFunc.k1(structForMain.chart_pointV.x[i - 1])) * myFunc.k2(ksi) * myFunc.k2(structForMain.chart_pointV.x[i]) + (structForMain.chart_pointV.x[i] - ksi) * (myFunc.k2(structForMain.chart_pointV.x[i]) + myFunc.k2(ksi)) * myFunc.k1(structForMain.chart_pointV.x[i - 1]) * myFunc.k1(ksi));
}
}
k[n] = 2 * myFunc.k2(structForMain.chart_pointV.x[(int)n]) * myFunc.k2(structForMain.chart_pointV.x[n - 1]) / (myFunc.k2(structForMain.chart_pointV.x[n - 1]) + myFunc.k2(structForMain.chart_pointV.x[(int)n]));
structForMain.chart_pointV.Vx.Add(x0);
for (int i = 1; i < 2 * n; ++i)
{
if (ksi >= (structForMain.chart_pointV2.x[i] + 0.5 * h2))
{
f2[i] = myFunc.f1(structForMain.chart_pointV2.x[i]);
q2[i] = myFunc.q1(structForMain.chart_pointV2.x[i]);
}
else if (ksi <= (structForMain.chart_pointV2.x[i] - 0.5 * h2))
{
f2[i] = myFunc.f2(structForMain.chart_pointV2.x[i]);
q2[i] = myFunc.q2(structForMain.chart_pointV2.x[i]);
}
else
{
f2[i] = 2 * n * ((ksi - (structForMain.chart_pointV2.x[i] - 0.5 * h2)) * myFunc.f1(0.5 * ((structForMain.chart_pointV2.x[i] - 0.5 * h2) + ksi)) + ((structForMain.chart_pointV2.x[i] + 0.5 * h2) - ksi) * myFunc.f2(0.5 * (ksi + (structForMain.chart_pointV2.x[i] + 0.5 * h2))));
q2[i] = 2 * n * ((ksi - (structForMain.chart_pointV2.x[i] - 0.5 * h2)) * myFunc.q1(0.5 * (ksi + (structForMain.chart_pointV2.x[i] - 0.5 * h2))) + ((structForMain.chart_pointV2.x[i] + 0.5 * h2) - ksi) * myFunc.q2(0.5 * ((structForMain.chart_pointV2.x[i] + 0.5 * h2) + ksi)));
}
if (ksi >= structForMain.chart_pointV2.x[i])
{
k2[i] = 2 * myFunc.k1(structForMain.chart_pointV2.x[i]) * myFunc.k1(structForMain.chart_pointV2.x[i - 1]) / (myFunc.k1(structForMain.chart_pointV2.x[i - 1]) + myFunc.k1(structForMain.chart_pointV2.x[i]));
}
else if (ksi <= structForMain.chart_pointV2.x[i - 1])
{
k2[i] = 2 * myFunc.k2(structForMain.chart_pointV2.x[i - 1]) * myFunc.k2(structForMain.chart_pointV2.x[i]) / (myFunc.k2(structForMain.chart_pointV2.x[i - 1]) + myFunc.k2(structForMain.chart_pointV2.x[i]));
}
else
{
k2[i] = 2 * h2 * myFunc.k1(structForMain.chart_pointV2.x[i - 1]) * myFunc.k1(ksi) * myFunc.k2(ksi) * myFunc.k2(structForMain.chart_pointV2.x[i]) / ((ksi - structForMain.chart_pointV2.x[i - 1]) * (myFunc.k1(ksi) + myFunc.k1(structForMain.chart_pointV2.x[i - 1])) * myFunc.k2(ksi) * myFunc.k2(structForMain.chart_pointV2.x[i]) + (structForMain.chart_pointV2.x[i] - ksi) * (myFunc.k2(structForMain.chart_pointV2.x[i]) + myFunc.k2(ksi)) * myFunc.k1(structForMain.chart_pointV2.x[i - 1]) * myFunc.k1(ksi));
}
}
k2[2 * n] = 2 * myFunc.k2(structForMain.chart_pointV2.x[2 * n]) * myFunc.k2(structForMain.chart_pointV2.x[2 * n - 1]) / (myFunc.k2(structForMain.chart_pointV2.x[2 * n - 1]) + myFunc.k2(structForMain.chart_pointV2.x[2 * n]));
structForMain.chart_pointV2.Vx.Add(x0);
for (int i = 1; i < n - 1; ++i)
{
diagonal1[i] = k[i + 1] * n * n;
diagonal2[i] = -(n * n * (k[i] + k[i + 1]) + q[i]);
diagonal3[i] = k[i + 1] * n * n;
}
diagonal2[(int)n - 1] = -(n * n * (k[n - 1] + k[n]) + q[n - 1]);
for (int i = 1; i < n; i++)
{
right_column[i] = -f[i];
}
right_column[1] -= x0 * k[1] * n * n;
right_column[n - 1] -= xn * k[n] * n * n;
double[] solutionForV = Sweep(diagonal1, diagonal2, diagonal3, right_column);
for (int i = 1; i < n; ++i)
{
structForMain.chart_pointV.Vx.Add(solutionForV[i - 1]);
}
for (int i = 1; i < 2 * n - 1; ++i)
{
diagonal1_2[i] = k2[i + 1] * n * n * 4;
diagonal2_2[i] = -(4 * n * n * (k2[i] + k2[i + 1]) + q2[i]);
diagonal3_2[i] = k2[i + 1] * n * n * 4;
}
diagonal2_2[2 * n - 1] = -(4 * n * n * (k2[2 * n - 1] + k2[2 * n]) + q2[2 * n - 1]);
for (int i = 1; i < 2 * n; i++)
{
right_column2[i] = -f2[i];
}
right_column2[1] -= x0 * k2[1] * n * n * 4;
right_column2[2 * n - 1] -= xn * k2[2 * n] * n * n * 4;
double[] solutionForV2 = Sweep(diagonal1_2, diagonal2_2, diagonal3_2, right_column2);
for (int i = 1; i < 2 * n; ++i)
{
structForMain.chart_pointV2.Vx.Add(solutionForV2[i - 1]);
}
structForMain.chart_pointV.Vx.Add(xn);
structForMain.chart_pointV2.Vx.Add(xn);
return(structForMain);
}
public ChartPoint SolutionsTest2(int n, double x0, double xn, double ksi)
{
ChartPoint chart_point = new ChartPoint();
chart_point.x = new List <double>();
chart_point.y = new List <double>();
chart_point.Vx = new List <double>();
double[] k = new double[n + 1];
double[] f = new double[n];
double[] q = new double[n];
double[] diagonal1 = new double[n - 1];
double[] diagonal2 = new double[n];
double[] diagonal3 = new double[n - 1];
double[] right_column = new double[n];
MyFunctions myFunc = new MyFunctions();
double h = (xn - x0) / n;
for (int i = 0; i < n + 1; i++)
{
chart_point.x.Add(i * h);
}
chart_point.y = GetSolutionTest2(n, h, ksi);
for (int i = 1; i < n; ++i)
{
if (ksi >= (chart_point.x[i]) + 0.5 * h)
{
f[i] = myFunc.f1(ksi);
q[i] = myFunc.q1(ksi);
}
else if (ksi <= (chart_point.x[i] - 0.5 * h))
{
f[i] = myFunc.f2(ksi);
q[i] = myFunc.q2(ksi);
}
else
{
f[i] = n * ((ksi - (chart_point.x[i] - 0.5 * h)) * myFunc.f1(ksi) + ((chart_point.x[i] + 0.5 * h) - ksi) * myFunc.f2(ksi));
q[i] = n * ((ksi - (chart_point.x[i] - 0.5 * h)) * myFunc.q1(ksi) + ((chart_point.x[i] + 0.5 * h) - ksi) * myFunc.q2(ksi));
}
if (ksi >= chart_point.x[i])
{
k[i] = myFunc.k1(ksi);
}
else if (ksi <= (chart_point.x[i - 1]))
{
k[i] = myFunc.k2(ksi);
}
else
{
k[i] = 2 * h * myFunc.k1(ksi) * myFunc.k1(ksi) * myFunc.k2(ksi) * myFunc.k2(ksi) / ((ksi - chart_point.x[i - 1]) * (myFunc.k1(ksi) + myFunc.k1(ksi)) * myFunc.k2(ksi) * myFunc.k2(ksi) + (chart_point.x[i] - ksi) * (myFunc.k2(ksi) + myFunc.k2(ksi)) * myFunc.k1(ksi) * myFunc.k1(ksi));
}
}
k[(int)n] = myFunc.k2(ksi);
chart_point.Vx.Add(x0);
for (int i = 1; i < n - 1; ++i)
{
diagonal1[i] = k[i + 1] * n * n;
diagonal2[i] = -(n * n * (k[i] + k[i + 1]) + q[i]);
diagonal3[i] = k[i + 1] * n * n;
}
diagonal2[n - 1] = -(n * n * (k[n - 1] + k[n]) + q[n - 1]);
for (int i = 1; i < n; i++)
{
right_column[i] = -f[i];
}
right_column[1] -= x0 * k[1] * n * n;
right_column[n - 1] -= xn * k[n] * n * n;
double[] sweep_result = Sweep(diagonal1, diagonal2, diagonal3, right_column);
for (int i = 0; i < sweep_result.Length; i++)
{
chart_point.Vx.Add(sweep_result[i]);
}
chart_point.Vx.Add(xn);
return(chart_point);
}