COMSOL 6.2 - mphselectbox

Select geometric entity using a rubberband/box.

n = mphselectbox(model,geomtag,boxcoord,entity,…)

n = mphselectbox(model,geomtag,boxcoord,entity,…) returns the indices of the geometry entities that are inside the rubberband domain (rectangle or box). This method looks only on the vertex coordinates and does not observe all points on curves and surfaces.

boxcoord set the coordinates of the selection domain, specified as an N-by-2 array, where N is the geometry space dimension.

entity can be one of point, edge, boundary, or domain following the entity space dimension defined below:

•

domain: maximum geometry space dimension

•

boundary: maximum geometry space dimension − 1

•

edges: 1 (for 3D geometries only)

The function mphpselectbox accepts the following property/value pairs:

Table 6-42: property/value pairs for the mphselectbox command.
property	value	default	description
adjnumber	Scalar	None	Adjacent entity number

When a model uses form an assembly, more than one vertex can have the same coordinate if the coordinate is shared by separate geometry objects. In that case you can use the adjnumber property to identify the domain that the vertices should be adjacent to.

Example

Find the domains using a box selection:

model = mphopen('model_tutorial_llmatlab');

coordBox = [-1e-3 11e-3;-1e-3 11e-3;9e-3 11e-3];

n = mphselectbox(model,'geom1',coordBox,'domain');

Find the boundaries inside the selection box:

n = mphselectbox(model,'geom1',coordBox,'boundary');

Find the boundaries inside the selection box that are adjacent to domain number 1:

n = mphselectbox(model,'geom1',coordBox,'boundary',…

'adjnumber',1);

Find geometric entity number in an assembly:

model = mphopen('model_tutorial_llmatlab');