/* No encapsulo este metodo en la clase Function porque romperia con la abstracción de la clase y todas las subclases de esta heredarian este método. */
private Function SelectFunction(string functionName, double a, double b, double c)
{
if (CosXFunction.GetFormula().Equals(functionName))
{
return(new CosXFunction(a, b));
}
else if (SenXFunction.GetFormula().Equals(functionName))
{
return(new SenXFunction(a, b));
}
else if (ExponentialFunction.GetFormula().Equals(functionName))
{
return(new ExponentialFunction(a, b));
}
else if (FirstGradeFunction.GetFormula().Equals(functionName))
{
return(new FirstGradeFunction(a, b));
}
else if (SecondGradeFunction.GetFormula().Equals(functionName))
{
return(new SecondGradeFunction(a, b, c));
}
else if (FractionalFunction.GetFormula().Equals(functionName))
{
return(new FractionalFunction(a, b));
}
return(null);
}
/* No encapsulo este metodo en la clase Function porque romperia con la abstracción de la clase y todas las subclases de esta heredarian este método. */
private String[] InitializeFunctionComboBox()
{
String[] functionList =
{
CosXFunction.GetFormula(),
SenXFunction.GetFormula(),
ExponentialFunction.GetFormula(),
FirstGradeFunction.GetFormula(),
SecondGradeFunction.GetFormula(),
FractionalFunction.GetFormula()
};
return(functionList);
}
public PointCollection[] DrawGraphic(Graphic g, double canvasWidth, double canvasHeight, FuncRect funcRect)
{
PointCollection points = new PointCollection();
Polyline graphicPolyline = new Polyline();
double xReal, yReal, xScreen, yScreen;
/* Sustituyo el FuncRect real por los limites que ha introducido el usuario (en caso de que los modifique) */
FuncRect real = funcRect;
FuncRect screen = DeclareFuncRect(0, canvasWidth, 0, canvasHeight);
int numberOfPoints = (int)screen.XMax;
int i = 0;
int j = 0;
int limit = 0;
if (g.Function.Formula.Equals(ExponentialFunction.GetFormula()) && g.ParamB < 0 ||
g.Function.Formula.Equals(FractionalFunction.GetFormula()))
{
PointCollection[] listOfPoints = new PointCollection[2];
while (j < 2)
{
do
{
i++;
xReal = real.XMin + i * (real.XMax - real.XMin) / numberOfPoints;
yReal = g.Function.CalculateF(xReal);
xScreen = ConvertXFromRealToPant(xReal, screen.XMin, screen, real);
yScreen = ConvertYFromRealToPant(yReal, screen.YMin, screen, real);
points.Add(new Point(xScreen, yScreen));
} while (Convert.ToInt32(xReal) < limit);
listOfPoints[j] = points;
points = new PointCollection();
j++;
xReal += 1;
limit = (int)real.XMax;
i = (int)(-(real.XMin) * numberOfPoints / (real.XMax - real.XMin));
}
return(listOfPoints);
}
else
{
PointCollection[] listOfPoints = new PointCollection[1];
for (i = 0; i <= numberOfPoints; i++)
{
xReal = real.XMin + i * (real.XMax - real.XMin) / numberOfPoints;
yReal = g.Function.CalculateF(xReal);
xScreen = ConvertXFromRealToPant(xReal, screen.XMin, screen, real);
yScreen = ConvertYFromRealToPant(yReal, screen.YMin, screen, real);
points.Add(new Point(xScreen, yScreen));
}
listOfPoints[0] = points;
return(listOfPoints);
}
}