Dirichlet free-form deformations and their application to hand simulation

Presents a generalized method for free-form deformations (FFDs) that combines the traditional FFD model with techniques of scattered data interpolation based on Delaunay and Dirichlet/Voronoi diagrams. This technique offers many advantages over traditional FFDs, including simple control of local deformations. It also keeps all the capabilities of FFD extensions, such as extended FFDs and direct FFDs. The deformation model has much potential for 3D modeling and animation. We choose to illustrate this with a non-trivial human simulation task: hand animation. We implement a multi-layer deformation model where Dirichlet FFDs (DFFDs) are used to simulate the intermediate layer between the skeleton and the skin.