private static IEnumerable <IEnumerable <Point2D> > CreateParameterAreas(IEnumerable <MacroStabilityInwardsSlice> slices,
Func <MacroStabilityInwardsSlice, RoundedDouble> getParameterFunc,
double scaleFactor)
{
if (slices == null || getParameterFunc == null)
{
return(Enumerable.Empty <Point2D[]>());
}
var areas = new List <Point2D[]>();
foreach (MacroStabilityInwardsSlice slice in slices)
{
RoundedDouble value = getParameterFunc(slice);
if (double.IsNaN(value))
{
value = (RoundedDouble)0.0;
}
value = value.ClipValue((RoundedDouble)(-2000.0), (RoundedDouble)2000.0);
double offset = value * scaleFactor;
double deltaX = slice.BottomLeftPoint.X - slice.BottomRightPoint.X;
double deltaY = slice.BottomLeftPoint.Y - slice.BottomRightPoint.Y;
double length = Math.Sqrt(Math.Pow(deltaX, 2) +
Math.Pow(deltaY, 2));
areas.Add(new[]
{
slice.BottomLeftPoint,
slice.BottomRightPoint,
new Point2D(slice.BottomRightPoint.X + offset * -deltaY / length,
slice.BottomRightPoint.Y + offset * deltaX / length),
new Point2D(slice.BottomLeftPoint.X + offset * -deltaY / length,
slice.BottomLeftPoint.Y + offset * deltaX / length)
});
}
return(areas);
}