Fish-eye view modes and parameters
There
are four different modes for fish-eye views:
- Self-adaptable fish-eye view (default)
- Fish-eye view with a fixed radius
- Fish-eye with a double focus
- Filtering fish-eye views
The last three items are controlled by parameters.
This is the default mode when fish-eye view is activated. Here the whole graph is visible. The distortion scale of the fish-eye view is automatically adapted to the current fish-eye view so that the graph just fits in the window.
The position of the focus in the window corresponds to the position of the focus in the graph. This way the user can extrapolate from the position of the focus in the window to the position of the focus in the graph. If the focus is positioned in the middle of the graph window this means that the user is viewing the middle part of the graph. If the focus is closer to e.g. near the upper frame of the graph window this means that the user is viewing the upper part of the graph. This helps to maintain orientation when browsing through the graph.
Fish-eye view with a fixed radius
In this mode, the whole graph is not visible but rather only a fixed radius around the focus. The focus is always centered in the graph window. This view is selected when the fixed radius fish-eye parameter is enabled in the View dialog box. After enabling this mode the radius of the visible region around the focus can be changed using the Radius scrollbar.
Fish-eye view with a double-focus point
This is an experimental feature. There are two foci in this mode which are created by overlapping two fish-eye views. The two foci can be positioned independently of one another. Picking position always changes the position of the focus that is closest to the newly selected position.
The entire graph is visible in this mode. The distortion scale of the two fish eyes is automatically adapted to the current fish eyes so that the graph just fits in the window.
Fish-eye view with a focal area
A focal area is possible in lieu of a focal point, the graph not being distorted inside the focal area. The size of the focal area can be changed via the Size fish-eye parameter. In polar view the shape of the focal area is a circle and in Cartesian view it is a square.
A filtering fish eye shows a lot of details around the focus, with details located far away from the focus being filtered, i.e. only the important objects (nodes and edges) are actually drawn there and the unimportant ones omitted.
The filtering fish-eye view does not work unless the graph
specification indicates the importance
of each node. This factor is indicated by an integer for each node. The higher
the number the more important the node. This factor enables aiSee to
decide whether a node is to be filtered out or drawn. The global parameter
Level (level of detail) found in the
View dialog box controls how many
details are visible in the graph window. The higher this value the more details are
filtered out. A value of zero corresponds to an unfiltered view of the graph.
» Next: Changing the layout
» Prev.: Fish-eye views
Last modified on 29 April 2002 by webmaster.
© 2000-2002 AbsInt.
URL: http://www.aisee.com/manual/unix/30.htm
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