This class represents the type 3 function dictionary. This is definitively detailed in:.

The ISO PDF Specification, ISO 32000-1:2008 PDF 1.7; Table: 41, page 97.

The ISO PDF Specification, ISO 32000-2:2017 PDF 2.0; Table: 41, page 127.

A Type 3 function, also called a stitching function, combines multiple sub-functions into a single piecewise function. The input domain is divided into subdomains and each subdomain is handled by one of the sub-functions.

The Functions entry holds an array of the sub-functions. The Bounds entry holds an array of boundary values that divide the domain into subdomains. There is one fewer boundary value than there are sub-functions.

The Encode array maps each subdomain's input range to the domain of the corresponding sub-function. This allows sub-functions defined over [0, 1] to be used without modification even when the stitching domain spans other ranges.

Type 3 functions are commonly used in shadings where a color gradient changes character at one or more points in the gradient, requiring different mathematical descriptions for different portions.

System.Object
    WebSupergoo.ABCpdf14.Elements.Element
       WebSupergoo.ABCpdf14.Elements.FunctionElement
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