This paper introduces new techniques and tools for drawing and manipulating stylized curves for modeling cartoon characters in computer assisted animation production. The approach is based on real-time processing of (possibly pressure sensitive) stylus data for generating on-the-fly the underlying curves. Our solution implies that graphics artists no longer need to manipulate (i.e. point, click and drag) control points of underlying splines, but rather exploit direct manipulation tools on the curves themselves. This simplifies the interaction drastically. Aside the basic drawing primitives, some higher level animation manipulation tools are elucidated as well. The underlying math and methodologies are explained and implementation results and examples are demonstrated.
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