Summary
Teddy is pretty much the paper that started all about the sketch based modeling. The idea is that given a closed free-from curve, finding its medial axis and placing evenly distributed circles on the medial axis perpendicular to the projection plane. These circles are then combine together by triangulation and a mesh is generated. Using the same interface user can modify the mesh, create handles or holes.
Discussion
I actually implemented a fair amount of ideas from this paper for my own research. The time it was published, it was like revolutionary approach to modeling. However it could not find real life applications besides being a digital toy.
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