COMSOL Multiphysics™

loft
The property LoftMethod can have the values linear or cubic, specifying if the
lofting should be linear/ruled or bicubic, respectively. The default method is cubic,
with the LoftWeights property set to the value [0.3*ones(1,ng-1);
0.7*ones(1,ng-1)].
Examples
Create a loft between a circle and a square.
gl1 = cell(1,2);
gl1{1} = circ2;
gl1{2} = rect2(2,2,'pos',[-1 -1]);
Let the edge between vertices number one and two in the circle correspond to the
edge between vertex number one and two in the square.
tl1 = cell(1,2); tl1{1} = [1;2]; tl1{2} = [1;2];
g1 = loft(gl1,'LoftVtxPair',tl1);
figure, geomplot(g1)
Create a loft between edge number 1 in the circle and edge number 1 in the square.
tl2 = cell(1,2); tl2{1} = 1; tl2{2} = 1;
Also, rotate the square.
g2 = loft(gl1,'LoftEdge',tl2,...
'LoftSecPos',{1,zeros(2,2),[0 -pi/4]});
figure, geomplot(g2)
Create a more complicated example.
gl2 = cell(1,3);
gl2{1} = arc2(0,0,2,0,pi/2)-circ2;
gl2{2} = rect2(2,2,'pos',[-1 -1]);
gl2{3} = gl2{1};
Specify reversed direction of edges by using negative signs.
tl3 = cell(1,3); tl3{1} = 4; tl3{2} = -2; tl3{3} = -3;
Also, rotate the last two sections.
g3 = loft(gl2,'LoftSgnEdge',tl3,'LoftSecPos',...
{[-1 -1 0; 0 0 1; 1 1 2]',zeros(2,3),[0 pi/4 pi]});
figure, geomplot(g3)
In the latter case, since there are no ambiguities, you could also use unsigned edge
numbers by specifying the property LoftEdge.
tl4 = cell(1,3); tl4{1} = 4; tl4{2} = 2; tl4{3} = 3;
g4 = loft(gl2,'LoftEdge',tl4,'LoftSecPos',...
{[-1 -1 0; 0 0 1; 1 1 2]',zeros(2,3),[0 pi/4 pi]});
figure, geomplot(g4)
246 | CHAPTER 1: COMMAND REFERENCE