Twin Segments (Reach and IK Mode)

This option modifies the user interface behavior of the 3D reach
mode and the inverse kinematics (IK) mode. When enabled, the option makes it possible to
delete the twin segment when clicking such a segment twice in a row. The
twin segment is the visual representation of the segment at its
target position, that is, the visual representation of the segment
at the compass location. When you activate the IK mode or the 3D
reach mode and select a segment, a twin segment is automatically
created and displayed at the compass location (it appears in yellow
by default, and can be modified using the Display tab); if you select the
segment twice in a row, the twin is deleted (assuming the option is
on); when clicking on the segment again, the twin is redisplayed,
and so on. This option thus makes the selection of a segment act as
a toggle
for the creation/deletion of the twin.
By default,
the Delete twin segment on second click check box is selected.

Angle Reference
This Human Builder option allows changing the way the value of certain angles are displayed in:
- the Posture Editor
- the Angular Limitations command
- the Postural Score Analysis dialog box.
Select the desired option:
- Default
- The angle values are displayed in such a way that the neutral position (0 deg) of a segment corresponds to its standard anatomic posture.
- Inter-Segment
- The angle values shown are the values between a segment and its parent segment (as circled below). In this Inter-Segment mode, only the first DOF (e.g. flexion/extension) of a segment is affected or modified, except for the hand (wrist), for which the modification is applicable on DOF2 (radial deviation/lunar deviation) as well.


It is important to note that this option does not change the way
the angles are calculated. When the Inter-segment option is
enabled, the only difference is that, instead of displaying the
value of a DOF itself, the software rather displays the
Inter-segment value for that DOF; the Inter-segment value being the
angle value between a segment and its parent segment as depicted
above.
The images below are an example of output from the Posture Editor
when the Inter-Segment option is enabled. Note that the Value frame
now reads
Value --- Inter-Segment.


Default is selected.