User's Manual

Document MV0319P.N
© Xsens Technologies B.V.
MVN User Manual
52
9.1.2 Views
Right click on the screen (or use the shortcut key) to choose one of the following camera viewpoints:
Menu command (+shortcut)
Action
Free move (V)
The camera is still.
The character may go out of view of the screen.
Trailing (T)
The character is always in view.
The pitch of the camera is fixed.
The distance of the camera to the character is fixed.
The height of the camera follows the height of the pelvis.
The camera heading is determined from the previous and new character
position.
Static (T)
The position of the camera is fixed.
The camera always looks at the character.
Static with Auto Zoom (T)
Similar principle to “Static” with the addition that the zoom is
automatically adjusted to ensure that the character remains the same
size
Fixed angle and distance (T)
The global heading and pitch of the camera are fixed.
The height of the camera follows the height of the pelvis.
Horizontal Follow (T)
Similar to “Trailing”, but the height and angle of the camera is now
adjusted to prevent the image from varying with change in pelvis height
Circle Around Character (T)
Virtual camera will slowly circle around the centered character
Coronal posterior (X)
Show the back of the character.
Coronal anterior (X)
Show the front of the character
Sagittal right (Y)
Show the right side of the MVN character in the sagittal plane
Sagittal left (Y)
Show the left side of the MVN character in the sagittal plane
Transversal cranial (Z)
Show the top of the MVN character
Transversal caudal (Z)
Show the bottom of the MVN character
The camera angle of the orthogonal views is by default defined by the movement of the pelvis. The
height of the camera is also based on the pelvis; when the character is jumping the character stays
within the view while the floor appears to move. This also has implications in the sagittal view; the subject
may bend, while this appears as though the feet slide forward. The data is still correct (as seen in the
3D view).
9.1.3 Overcoming distortions
Information used to provide the accurate orientations are based on sensor fusion and comes together
in what MVN calls a Fusion Engine. The Xsens Fusion Engine (XFE) uses data collected not only
instantaneously but also built up from the history of the session. If the subject wearing the system
remains in an environment that can be detrimental to the data (e.g. in a prolonged magnetically
disturbing area) it may be necessary to clear the history; this will be apparent by the appearance of the
character, for example segments may be unnaturally twisted with respect to others. Depending on the
severity of the effect of the distortion on the character, two different types of reset are possible as
detailed below.