public Tuple <double, double, double, double> Range_MinX_MaxX_MinY_MaxY(PlotArea plotArea, WorldArea worldArea)
{
double minX = Knots.Min();
double maxX = Knots.Max();
double minY = ControlPoints.Min();
double maxY = ControlPoints.Max();
for (int i = 0; i < LinesOfSpline.Count; i++)
{
var X1 = TransformCoordinates.PlotAreaToWorldAreaX(LinesOfSpline[i].X1, plotArea, worldArea);
var X2 = TransformCoordinates.PlotAreaToWorldAreaX(LinesOfSpline[i].X2, plotArea, worldArea);
var Y1 = TransformCoordinates.PlotAreaToWorldAreaY(LinesOfSpline[i].Y1, plotArea, worldArea);
var Y2 = TransformCoordinates.PlotAreaToWorldAreaY(LinesOfSpline[i].Y2, plotArea, worldArea);
if (X1 < minX)
{
minX = X1;
}
if (X2 > maxX)
{
maxX = X2;
}
if (Y1 < minY)
{
minY = Y1;
}
if (Y2 > maxY)
{
maxY = Y2;
}
}
//for (int i = 0; i < DragEllipses.Count; i++)
//{
// var X = TransformCoordinates.PlotAreaToWorldAreaX(DragEllipses[i]., plotArea, worldArea);
// var Y = TransformCoordinates.PlotAreaToWorldAreaY(DragEllipses[i].X2, plotArea, worldArea);
//}
return(Tuple.Create(minX, maxX, minY, maxY));
}