COMSOL 6.4 - DeleteSmallFaces

DeleteSmallFaces

Find and delete small faces in CAD objects.

Syntax

model.component(<ctag>).geom(gname).feature().create(<ftag>,"DeleteSmallFaces");

model.component(<ctag>).geom(<tag>).feature(<ftag>).selection(property);

model.component(<ctag>).geom(<tag>).feature(<ftag>).set(property,<value>);

model.component(<ctag>).geom(<tag>).feature(<ftag>).getType(property);

model.component(<ctag>).geom(<tag>).feature(<ftag>).find();

model.component(<ctag>).geom(<tag>).feature(<ftag>).detail();

model.component(<ctag>).geom(<tag>).defeaturing("SmallFaces").selection(property);

model.component(<ctag>).geom(<tag>).defeaturing("SmallFaces").set(property,<value>);

model.component(<ctag>).geom(<tag>).defeaturing("SmallFaces").find();

model.component(<ctag>).geom(<tag>).defeaturing("SmallFaces").detail();

model.component(<ctag>).geom(<tag>).defeaturing("SmallFaces").delete(<ftag>);

model.component(<ctag>).geom(<tag>).defeaturing("SmallFaces").deleteAll(<ftag>);

Description

model.component(<ctag>).geom(<tag>).defeaturing("SmallFaces").delete(<ftag>) creates a DeleteSmallFaces feature tagged <ftag> with the specified properties. The property delete is set to selected. If the feature can be built, it is inserted in the geometry sequence after the current feature; otherwise, the feature is discarded.

model.component(<ctag>).geom(<tag>).defeaturing("SmallFaces").deleteAll(<ftag>) works as the delete method, but the property delete is set to all.

It is also possible to create a DeleteSmallFaces feature using the standard create method. The following properties are available.

Table 4-14: Available Properties.
Property	Value	Default	Description
delete	all \| selected	selected	Delete all small faces of given size, or a selection. Only available for the feature.
entsize	double	1e-3	Maximum face size.
input	Selection		Names of input objects.
selresult	on \| off	off	Create selections of all resulting objects.
selresultshow	all \| obj \| dom \| bnd \| edg \| pnt \| off	dom	Show selections of resulting objects in physics, materials, and so on, or in part instances. obj is not available in a component’s geometry. dom, bnd, and edg are not available in all features.
contributeto	String	none	Tag of cumulative selection to contribute to.

A small face is a face that fits within a sphere of specified radius, given in the property entsize.

model.component(<ctag>).geom(<tag>).feature(<ftag>).find() searches the input objects for faces with size less than entsize.

model.component(<ctag>).geom(<tag>).feature(<ftag>).detail() returns a selection object where you can select a subset of the faces found.

The find and detail methods of model.component(<ctag>).geom(<tag>).defeaturing("SmallFaces") have the corresponding functionality for the defeaturing tool.

Only faces that can be deleted without invalidating the object are deleted. If a face was not possible to delete, a warning message is given, accessible through model.component(<ctag>).geom(<tag>).feature(<ftag>).problem().

Compatibility

The following property is no longer supported:

Table 4-15: Obsolete Properties.
Property	Value	Default	Description
Out	stx \| ftx \| ctx \| ptx \| status	none	Output variables.

Example

The following example imports the geometry model from the file defeaturing_demo_6.x_b, finds sliver faces narrower than 10−3, and deletes the first of these.

Model model = ModelUtil.create("Model1");

model.component.create("comp1");

model.component("comp1").geom().create("geom1",3);

model.component("comp1").geom("geom1").feature().create("imp1","Import");

model.component("comp1").geom("geom1").feature("imp1").set("filename", "defeaturing_demo_6.x_b");

model.component("comp1").geom("geom1").runAll();

model.component("comp1").geom("geom1").feature().create("df1","DeleteSmallFaces");

model.component("comp1").geom("geom1").feature("df1").selection("input").set("imp1");

model.component("comp1").geom("geom1").feature("df1").find();

model.component("comp1").geom("geom1").feature("df1").detail().setGroup(1);

model.component("comp1").geom("geom1").run();