The DX function returns the x-direction location of one marker or the distance between two markers in relation to a third marker’s x-direction.
Format

Arguments definition
|
Marker1 |
The name or argument number of a marker to be calculated |
|
Marker2 |
The name or argument number of a marker to be calculated •If omitted, then the InertiaMarker is applied. |
|
Marker3 |
The name or argument number of a marker to be calculated •If omitted, then the InertiaMarker is applied. |
Formulation

: Position
vector of Marker1
: Position
vector of Marker2
:
x-direction unit vector of Marker3

Example
DX(body1.Marker1)
DX(body1.Marker1, body2.Marker1)
DX(body1.Marker1, body2.Marker1, body3.Marker1)
DX(1,2,3) <Argument: (1)body1.Marker1, (2)body2.Marker1, (3)body3.Marker1>