*MarkerPair()

Creates a triad pair representing a pair of coordinate systems.

Syntax

*MarkerPair(marker_name,"marker_label",body, origin, [FLOATING])

Arguments

marker_name: The variable name of the marker pair.; Data type: varname
marker_label: The descriptive label of the marker pair.; Data type: label
body: The body or body pair to which the marker pair is attached.; Data type: Body or BodyPair
origin: The location(s) of the marker pair.; Data type: Point or PointPair
FLOATING: An optional argument that indicates it is a pair of floating markers.

Example

*PointPair(p_spalign, "Spindle align pt")
*BodyPair(b_kn, "Knuckle" p_kn_cg)
*MarkerPair(mrk_spalign, "Spindle align marker", 
                       b_kn, 
                       p_spalign)

Context

*BeginMdl()

*DefineAnalysis()

*DefineSystem()

Properties

Table 1.
Property	Returns Data Type	Description
body	BodyPair	The body pair to which the marker pair is connected.
l	Marker	Left marker.
label	string	The descriptive label of the marker pair.
origin	PointPair	The origins of each of the markers of the marker pair.
r	Marker	Right marker.
state	boolean	Control state (TRUE or FALSE).
varname	string	The variable name of the marker.
xaxis, yaxis, zaxis	VectorPair	A unit vector pair along the X, Y, and Z axis of the marker pair.

Comments

The individual markers of a *MarkerPair() can be referred to as marker.l (left marker) and marker.r (right marker).

A floating marker is not fixed with reference to the part reference frame. Its time history is determined by the force or joint element it is used to define.

The orientation of a marker may be specified using a *SetOrientation() statement. By default, a marker is oriented the same as the global reference frame.