private void DrawWithRungeKutt(BaseChart chart, Series series, double x, double y, double[] parameters)
{
for (int i = 0; i < _iterations; i += IterationsStep)
{
double k1 = _stepValue * chart.f(x, y, parameters);
double l1 = _stepValue * chart.g(x, y, parameters);
double k2 = _stepValue * chart.f(x + k1 / 2, y + l1 / 2, parameters);
double l2 = _stepValue * chart.g(x + k1 / 2, y + l1 / 2, parameters);
double k3 = _stepValue * chart.f(x + k2 / 2, y + l2 / 2, parameters);
double l3 = _stepValue * chart.g(x + k2 / 2, y + l2 / 2, parameters);
double k4 = _stepValue * chart.f(x + k3, y + l3, parameters);
double l4 = _stepValue * chart.g(x + k3, y + l3, parameters);
series.Points.AddXY(x, y);
x += RungeKuttConst * Math.Round(k1 + 2 * k2 + 2 * k3 + k4, 5);
y += RungeKuttConst * Math.Round(l1 + 2 * l2 + 2 * l3 + l4, 5);
}
}
private void DrawWithEulerMethod(BaseChart chart, Series series, double x, double y, double[] parameters)
{
for (int i = 0; i < _iterations; i += IterationsStep)
{
series.Points.AddXY(x, y);
/*Если попытаться написать x += _stepValue * chart.f(x, y); y += _stepValue * chart.g(x, y);
* То теряются какие то знаки после запятой, почему?
* */
double nextX = x + _stepValue * chart.f(x, y);
double nextY = y + _stepValue * chart.g(x, y);
x = nextX;
y = nextY;
}
}