COMSOL Multiphysics™

elevate
Purpose
elevate
Elevate degrees of 2D geometry object Bézier curves.
Syntax
Description
ge = elevate(g,en,d)
[ge,tl] = elevate(g,en,d)
ge = elevate(g,dl)
[ge,tl] = elevate(g,dl)
ge = elevate(g,en,d) elevates the degrees of edges en in the 2D geometry
object g, using the degree steps d. en is a vector that specifies the edge numbers of
the curves to be degree elevated, and d is the corresponding vector that specifies the
degrees of elevation, so that curve number en(i) is elevated by d(i) degrees.
ge = elevate(g,dl) degree elevates the Bézier curve defined by g.rb{i}(:,k)
and g.wt{i}(:,k), by the number of degrees specified in dl{i}(:,k). dl is a cell
array of the same size as rb and wt. See geom2 for details on these properties. The
first and last entries in dl must be empty, since there are no curves of degree 0, and
curves of maximum degree cannot be degree elevated.
[ge,tl] = elevate(g,...) additionally returns the cell array tl, of length 3,
containing permutation vectors for vertices, edges and subdomains, respectively.
Entry i of such a vector contains the entity number j of the geometry object g from
which the entity i in ge originates.
Examples
Elevate the degree of edge 1 and 3 in a circle, by one degree.
c1 = circ2;
figure, geomplot(c1,'edgelabels','on','ctrlmode','on');
axis equal
[c2,tl] = elevate(c1,[1 3],[1 1]);
figure, geomplot(c2,'edgelabels','on','ctrlmode','on');
axis equal
An alternative way of obtaining the same degree elevated circle, is to use the input
argument dl, as is done below.
c3 = elevate(c1,{[] [] [1 0 1 0] []});
figure, geomplot(c3,'edgelabels','on','ctrlmode','on');
axis equal
See Also
geom0, geom1, geom2, geom3
78 | CHAPTER 1: COMMAND REFERENCE