Sketch-Based Modeling with the BlobTree ( sketches 0292 )

Sketch-based modeling provides an intuitive and expressive interface for 3D model creation. With the Teddy [Igarashi et al. 1999] system, complex free-form 3D models could be quickly produced using a gesture interface. However, the topological modeling operations implemented in Teddy were limited by the underlying shape representation (triangle meshes). Related systems based on variational implicit surfaces [Araújo and Jorge. 2003] produce smoother results but cannot support complex models.