Flattenable Mesh Surface Fitting on Boundary Curves

摘要

This paper addresses the problem of fitting flattenable mesh surfaces in R~3 onto piecewise linear boundary curves, where a flattenable mesh surface inherits the isometric mapping to a planar region in R~2. The developable surface in differential geometry shows the nice property. However, it is difficult to fit developable surfaces to a boundary with complex shape. The technique presented in this paper can model a piecewise linear flattenable surface that interpolates the given boundary curve and approximates the cross-tangent normal vectors on the boundary. At first, an optimal planar polygonal region is computed from the given boundary curve B ∈R~3, triangulated into a planar mesh surface, and warped into a mesh surface in R~3, satisfying the continuities defined on B. Then, the fitted mesh surface is further optimized into a flattenable Laplacian (FL) mesh, which preserves the positional continuity and minimizes the variation of cross-tangential normals. Assembled set of such FL mesh patches can be employed to model complex products fabricated from sheets without stretching.