Local Editing Algorithm for Mesh Models

A local editing algorithm capable of accurately controlling the boundary of deformation regions as well as displacement of points on model surface is proposed.First‚a control mesh attached to the model surface is built interactively‚and using projection or other rules to establish the parametr-i zation and mapping relationship between points on the model surface and control mesh.Then conforming to the required object shape‚edit the control mesh interactively.The movement of control mesh makes the model surface deforming to the intended form.The control mesh may take the form of regular array of control vertices for parametric NURBS surface‚general triangle mesh‚or pre-defined mesh template. In order to precisely control deformation of the model‚common area of the model mesh and control mesh are subdivided adaptively.This method involves simple calculations and is easy to implement.Experiments show that the algorithm is straightforward and can achieve good result.