Sketch-based editing of curves

摘要

A method and system for editing a brush stroke in a graphics system in which a brush stroke includes a trajectory curve, an envelope curve, and envelope information, comprising: editing a trajectory curve of a brush stroke by sketch-based editing, sketch-based editing comprising receiving a sketch curve as input and modifying the trajectory curve based on the sketch curve; and calculating a new envelope curve for a new brush stroke using the edited trajectory curve and the envelope information of the existing brush stroke.