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Properties |
Methods |
Set of common physical data of a vertex, which are applicable to all kind of problems.
The LabelVertex object represents very general physical data applicable to a vertex label. When you need to change physical parameters for the vertex label, you get the LabelVertex object using the Content property of the Label object, modify the LabelVertex object using its properties and then put it back in the Label object assigning your LabelVertex to the Content property of your Label object. Please see the example for Label object
The exact type of the LabelVertex object you get by the Label.Content property depends upon the problem type as show in the table:
Kind of Analysis | LabelVertex Type |
| Electrostatic problem | |
| DC conduction problem | |
| AC conduction problem | |
| Transient electric problem | |
| DC and transient magnetics problem | |
| AC magnetics | |
| Heat transfer problem (static and transient) | |
| Stress analysis problem |
The generic LabelVertex object provides only those properties that are common for all specific types of LabelVertices. These are:
| Type property
as qfVertex | Read-only | Returns the qfVertex value showing that the data are applicable to a vertex label. |
| ProblemType property
as QfProblemTypes | Read-only | Returns the problem type. |
| ConditionType property
as QfBoundaryConditionType | Read-only | Returns one of the QfBoundaryConditionType constants indicating the type of boundary condition (Dirichlet, Neumann, and other). |
| Dirichlet property
as Double | Read and write | Sets the given potential value on the vertex. |
| Loading property
as Double | Read and write | Sets the value of concentrated loading on the vertex. |
| Empty property
as Boolean | Read-only | Is True when the data are not given for this object. |
| SetEmpty | Method | Makes the LabelVertex empty. |
Each LabelVertex's subtype inherits all the methods and properties of the basic LabelVertex type listed above.
Generally a vertex cannot have more than one boundary condition defined. Alternative types returned by the ConditonType property are:
qfDirichlet - the vertex has a prescribed value of the potential;
qfLoading - the value of the normal component of the potential gradient is defined;
If you set the boundary condition type for a vertex several times, only the last setting is remembered.
The following example iterates through vertex labels in the document and sets the same value as a Dirichlet condition to all Dirichlet vertices, and zero as a concentrated loading for other vertices:
Dim lb As QuickField.Label
For Each lb In prb.DataDoc.Labels(qfVertex)
Dim vertexData As LabelVertex
Set vertexData = lb.Content
With vertexData
If .ConditionType = qfDirichlet Then
.Dirichlet = 200
Else
.Loadings = 0
End If
End With
lb.Content = vertexData
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