Tone Mapping Control

The Tone Mapping control uses a curve based input control. The control consists of two parts: "Graph" part and "Text" part. The "Text" part presents the "reference" points, which are illustrated inthe "Graph" part by rectangles. The curve is constructed on the basis of the "reference" points using the Lagrange polynomials (with condition that x, y should be inside [0,1]). The curve must contain at least two points to be valid (0 0) and (1 1).


The curve can be edited as through the "Graph" part and through the "Text" part inthe following way:

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