Animated Display Options
The Animated Display Options Window can be accessed by
double-clicking on the Animated Display
Object or from the Options
Menu.

The top section contains controls for defining the coordinate
system. A Symmetric Space
means the coordinate system is square, with a 1 cm displacement either
up or left that will correspond to the same change. In this case you
can
specify the range spanning the horizontal dimension and you can specify
the minimum of the vertical dimension. The vertical maximum is then
determined by the proportions of the animated display object as it is
placed on the page, because the scales are the same in both dimensions.
You will want a symmetric space if the same kind of quantity, such as
position, is driving the point both horizontally and vertically. In
contrast, if the point will be driven by different kinds of data, such
as time and position, then you will want to use an asymmetric space. In
that case, you can set the minimum and maximum coordinates in both
directions. If you resize the display, the coordinates will change
proportionally.
To define, or animate the point, click on the "Animate Point"
button to
access the dialog displayed below.

The default settings for the horizontal and vertical components of the
point are set to "Fixed Value". In addition to "Fixed Value" you can
choose any data column appearing in the pull down menu. If the column
you choose contains data that changes with time, the point will be
animated. If you chose "Fixed Value" then you must specify a value in
the appropriate edit box.
The checkbox "Draw in Video Analysis Movie" is a limited feature
enabled only if you have carried out a Video
Analysis operation on a movie and have used the "X" and "Y"
columns to animate the point. If these conditions are met, then as you
replay the movie any vectors that you have defined in "Animated
Display" will be drawn on the movie during replay.
The vectors are defined by clicking on one of the "Vector 1", "Vector2"
or "Vector3" buttons, which bring up dialog box displayed below.

The horizontal and vertical components are defined exactly like the
components of the point as described above.
In addition, each vector can be assigned a name and a color. You can
also set a scaling factor to use for each vector. The scaling is
applied to both the horizontal and vertical components so the direction
of the vector is not affected. Scaling may be needed to adjust the
display
of a vector so that it will fit into the range defined for the display
space. Data columns defining the vectors may have different units from
those used to define the space. If,
for example, the range of -10 to10 m has been set to span the animated
display, a velocity vector having components on the order of 100 m/s
need
to be scaled by a factor of 0.02 or so in order to be visible. If the
animated object's display space has been set to be asymmetric,
additional scaling is applied to the components of a vector
so that the vector is not distorted in this space.
A checkbox is also provided to hide a vector. This enables you to
define a vector but hide it from the display until you want to see it.
After defining the point and one or more vectors, you can further
control the animated display using the "Trace" and "Footprints"
settings. These settings are useful only if the point is defined by a
data column which varies over time. When the trace option is on, all
positions occupied by the point during the course of a "Replay" of the
data are connected by line segments thereby producing a history of the
positions. The trace simply connects positions of the point. The
footprints option draws the point and the vectors attached to it at the
intervals set by the user.
Checkboxes are also provided for controlling display of additional
information for the vectors. You can turn on the display of the names,
the X-Y values, and display X and Y component vectors for the defined
vectors. These controls apply to all of the defined vectors, which may
generate a cluttered display. In that case, you can elect to hide one
or more vectors or perhaps set up multiple animated displays, each
showing a single vector.