Importance

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Abstract

A method and apparatus are disclosed for finding a length of a curve created to be displayed on an output device interactively and directly. A processor may specify the curve from input signals generated by an input device in response to direct control by a user. An apparatus may include a pointer for inputting points along a path-defined curve. A processor outputs to an output device certain rendering data for rendering an image of the curve in real time for feeding back to a user. The user may augment (edit, extend) the curve by moving the pointer to add input points to the curve, based on the image fed back. The apparatus and method provide a curve length for determining goodness of fit of a curve for rendering the interactive image to be viewed by a user. The fitted curve is rendered on an output device and fed back immediately to a user in constant time, regardless of the number of points accommodated by the curve as the user adapts the curve by moving the pointer to add inputs.

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First Claim