# gf_levelset¶

Synopsis

LS = gf_levelset(mesh m, int d[, string 'ws'| string f1[, string f2 | string 'ws']])


Description :

General constructor for levelset objects.

The level-set object is represented by a primary level-set and optionally a secondary level-set used to represent fractures (if p(x) is the primary level-set function and s(x) is the secondary level-set, the crack is defined by $$p(x)=0$$ and $$s(x)\leq0$$ : the role of the secondary is to determine the crack front/tip).

note:

All tools listed below need the package qhull installed on your system. This package is widely available. It computes convex hull and delaunay triangulations in arbitrary dimension.

Command list :

LS = gf_levelset(mesh m, int d[, string 'ws'| string f1[, string f2 | string 'ws']])

Create a levelset object on a mesh represented by a primary function (and optional secondary function, both) defined on a lagrange mesh_fem of degree d.

If ws (with secondary) is set; this levelset is represented by a primary function and a secondary function. If f1 is set; the primary function is defined by that expression (with the syntax of the high generic assembly language). If f2 is set; this levelset is represented by a primary function and a secondary function defined by these expressions.