Returns zero if the input value is smaller then zero of if it is NaN. Negative value are not possible for the measured reflectance. The values calculated with the NURBS could be negative when the time point is very close to the 'physical' beginning of the curve R(t) due to obscilatoions of the interpolations used to capture the ascent of the curve.

public double CheckIfValidOutput(
	double value
)

public double CheckIfValidOutput(
	double value
)

Public Function CheckIfValidOutput ( 
	value As Double
) As Double

Public Function CheckIfValidOutput ( 
	value As Double
) As Double

public:
double CheckIfValidOutput(
	double value
)

public:
double CheckIfValidOutput(
	double value
)