Example-Based Curve Generation

Figure 1: Using the example curve sketched in red, several curves (blue) are generated automatically in the style of the example using our algorithm. The new curves have over 50 branches and all of them were created in less than three minutes. Four of the generated curves are shown on the left. The curves contain many branching points. The curves are directly used to create models of chandeliers by using them as generators for surfaces of revolution or lofting. The final surface is made of about 60,000 Bezier patches. Abstract We present a novel synthesis method for procedural generation of complex curves. Our approach takes a simple example input curve specified by a user and automatically generates complex curves that resembles the input. The algorithm preserves many of the in- put shape features such as tangent directions, curvature and branch nodes. The overall system is simple and can be used to generate dif- ferent kind of curved 3D models in a few minutes. We demonstrate its application to generating complex, curved models of man-made objects including furniture pieces, chandeliers, glasses, and natural patterns such as river networks and lightning bolts.