Example-based curve synthesis

We present a novel synthesis algorithm for procedurally generating complex curves. Our approach takes a simple example input curve specified by a user and automatically generates complex curves that resemble the input. The algorithm preserves many of the input shape features such as tangent directions, curvature, branch nodes, and closed loops. The overall approach is simple and can be used to generate varied curved 3D models in a few minutes. We demonstrate its application to generating complex, curved models of manmade objects including furniture pieces, chandeliers, glasses, and natural patterns such as river networks and lightning bolts.