COMSOL Multiphysics™

loft
gl{2} and so on. It is required that v1([1 2],1) are the end points on the same
curve.
Only one of these properties is allowed. If, however, none is specified then the
property/value-pair LoftSgnEdge with the value {[1:nbs],[1:nbs],...} is used
as default, where nbs is the number of edges in gl{1}. This means that the edges
are considered in order, and is useful for lofting between sections that are simple or
similar to each other.
The properties LoftSecPos or Wrkpln are used to specify the geometrical data of
each section.
The property LoftSecPos with the value {D,V,R} has the following meaning:
D is either a 1-by-(ng-1) vector or a 3-by-ng matrix that specifies the position for
each geometry section. If D is a vector, it contains real numbers that specifies the
relative displacement in the local z-direction between each pair of consecutive
sections in gl, where it is assumed that gl{1} is positioned at z = 0. If D is a matrix,
then each column specifies the 3D displacements for each of the sections in gl.
Rows 1, 2 and 3 specifies the displacements in the x-, y- and z-direction respectively.
V is either a 2-by-ng or a 3-by-ng matrix specifying the tilt-rotations of the geometry
objects. If V is a 2-by-ng matrix, then each column specifies rotational angles in
spherical coordinates. V(1,:) are the polar angles, that is, the angles between
directional normals of each object and the positive z-axis, and V(2,:) are the
azimuthal angles of the directional normals. If V is a 3-by-ng matrix, then each
column specifies a directional normal vector for each section.
R is a 1-by-ng vector that specifies the intrinsic rotation of the geometry sections.
Every element of R is a rotational angle, in radians, with respect to the local z-axis.
The alternative syntax is the property Wrkpln with the value {T1,T2,...}, where
Ti is a matrix of size 3-by-3. Here Ti is understood to specify the work plane for
section gl{i}. See geomgetwrkpln for more information on work planes.
Only one of these properties is allowed. If none is specified then the property
LoftSecPos with the value {ones(1,ng-1),zeros(2,ng),zeros(1,ng)} is used
as default. Moreover, if any of the cells D, V, or R is left empty, the default value is
used for that cell.
The property LoftWeights specifies the relative significance of the geometry
sections with respect to tangential continuity. This argument has no meaning for
linear lofting and is then ignored.
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