org.icepdf.core.pobjects.functions

Class Function_2

java.lang.Object

org.icepdf.core.pobjects.functions.Function

org.icepdf.core.pobjects.functions.Function_2

public class Function_2
extends Function

This class Function_2 represents a generic Type 2, exponentail interpolation function type. Type 2 functions include a set of parameters that define an exponential interpolation of one input value and n output values:

f(x) = y₀, ..., y_n-1

Values of Domain must constrain x in such a way that if N is not an integer, all values of x must be non-negative, and if N is negative, no value of x may be zero. Typically, Domain is declared as [0.0 1.0], and N is a postive number. The Range attribute is optional and can be used to clip the output to a specified range. Note that when N is 1, the function performs a linear interpolation between C0 and C1; therefore, the function cna also be expressed as a sampled function (type 0).

Since:

1.0

See Also:

Function

Field Summary

Fields

Modifier and Type	Field and Description
static Name	C0_KEY
static Name	C1_KEY
static Name	N_KEY

Fields inherited from class org.icepdf.core.pobjects.functions.Function

domain, DOMAIN_NAME, functionType, FUNCTIONTYPE_NAME, range, RANGE_NAME

Method Summary

Modifier and Type	Method and Description
float[]	calculate(float[] x) Exponential Interpolation calculation.
java.lang.String	toString()

Methods inherited from class org.icepdf.core.pobjects.functions.Function

getDomain, getFunction, getFunctionType, getRange, interpolate

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

N_KEY

public static final Name N_KEY

C0_KEY

public static final Name C0_KEY

C1_KEY

public static final Name C1_KEY

Method Detail

calculate

public float[] calculate(float[] x)

Exponential Interpolation calculation. Each input value x will return n values, given by:

y_j = CO_j + x^N x (C1_j - C0_j), for 0 <= j < n

Specified by:

calculate in class Function

Parameters:

x - input values m

Returns:

output values n

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object