COMSOL Multiphysics™

face3
Purpose
face3
Create 3D surface geometry object.
Syntax
Description
f3 = face3(x,y,z)
f3 = face3(x,y,z,w)
f3 = face3(vtx,vtxpre,edg,edgpre,fac,mfdpre,mfd)
[f3,...] = face3(g3,...)
f3 = face3(g2)
f3 = face3(x,y,z) creates a face3 object f3. The degree of the rational Bézier
surfaces is determined from the size of the matrices x, y and z. The arrays x, y and z
are always of equal size. If size(x,2)>1 then a rectangular patch is created. If
size(x,2)==1 then a triangular patch is created.
The valid combinations of matrix sizes of x, y and z are: 3-by-1 for creating
triangular planar patches, 2-by-2, 3-by-2, 4-by-2, 3-by-3, 4-by-3, 4-by-4 for
rectangular patches of degree (1,1), (2,1), (3,1), (2,2), (3,2), and (3,3) respectively.
f3 = face3(x,y,z,w) works similarly to the above, but also applies arbitrary
positive weights to the points of the surface.
f3 = face3(vtx,vtxpre,edg,edgpre,fac,mfdpre,mfd) creates a 3D surface
geometry object f3 from the fields vtx, vtxpre, edg, edgpre, fac, mfdpre, mfd.
The arguments must define a valid face object. See geom3 for a description of the
arguments.
[f3,...] = face3(g3,...) coerces the 3D geometry object g3 to a 3D face
object f3.
f3 = face3(g2) coerces the 2D geometry object g2 to a 3D face object f3. The
object f3 is then embedded in the plane z=0 and is a trimmed planar patch since it
is not in general representable as a rectangular or triangular Bézier patch.
The coercion function [f3,...] = face3(g3,...) a accepts the following
property/values:
TABLE 1-22: VALID PROPERTY/VALUE PAIRS
PROPERTY VALUE DEFAULT DESCRIPTION
Out stx | ftx |
ctx | ptx
{} Cell array of output names.
See geomcsg and geom for more information on geometry objects.
The 3D geometry object properties are available. The properties can be accessed
using the syntax get(object,property). See geom3 for details.
117