Plane and Vector Selector

Plane and Vector Selector

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Plane and Vector Selector

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Several panels require that you define a plane or a vector (direction) to perform a certain function. For example, the Translate panel requires that you define the direction of translation, while the Reflect panel requires a plane for the creation of the mirror images of the entities selected.

BasicFEA takes advantage of the following principle: a plane can be defined with a vector (the plane is normal to the vector specified), just as a vector can be defined with a plane (the vector is normal to the plane specified). Either can be defined via the plane and vector selector - a group of items that work in concert to define planes or vectors, as needed:


The plane and vector selector

This selector is broken down into the following items. Note, however, that not every item appears at all times; only the items necessary for the current BasicFEA function will display.



switch Selector_switch_button

The switch is used to select the method for defining the plane or vector. The options available are:


Use x-axis, y-axis and z-axis to define the first, second or third axis respectively of a coordinate system in your model. This coordinate system may be the global coordinate system, or a local system when one can be explicitly specified. Local systems may be rectangular, cylindrical or spherical.
Choose vector to specify a vector entity (created in the Vectors panel). This includes vectors defining coordinate systems, and loads as well.
Use N1, N2, N3 to define a vector (N1,N2), or plane (N1,N2,N3). When defining a plane, the resulting vector is normal to this plane following the right hand rule, and passes through either N1 or the base node (if one is specified).

Double-click a node’s button (N1, N2, or N3, or B) to type in coordinates rather than selecting existing nodes in your model.

B (base node)

Use this selector to define the base node — the point in space where the vector or plane is located. For example, selecting a plane of projection using the x-axis does not define the location of the plane entirely. A base node provides the extra information.

Note that when using the N1, N2, N3 option, BasicFEA uses N1 as a default base node if no other base node is specified.

reset selector_reset_button

Allows you to clear your selection (vector, N1,N2,N3 and base).

Note:BasicFEA treats second-order elements just like first-order ones for the majority of these checks. However, Jacobian and Chordal Deviation checks will return slightly different results for second-order elements than they will for first-order ones. For example, second-order elements may produce less chordal deviation, but might also produce a worse Jacobian value.


See Also:

Menu Buttons


Entity Selectors

Input Fields

Pop-up Menus

Input Controls