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VIEW SELECTION
View selection overview
The VIEW SELECTION menu provides facilities to set limits for the data region to be used for
subsequent displays and to set the view orientation that any data is displayed from.
The view menu consists of three vertical sections. The left most section allows the data extent to
be limited and the plane type to be selected. The selection of a data region is indicated by the cell
indices in the three orthogonal data-base directions X, Y and Z. The extent of the data to be
visualised by subsequent commands is then indicated by three pairs of low and high cell index
limits. A visual feedback of the selected region is visible in the graphical area as the solid-line
boundary.
The cell limits can also be selected by coordinate values. These are the [SET] buttons near the
cell limit indicators. Using set will present a text input bar which will display the current
coordinate range for the chosen direction. Once you have entered the required range the
coordinates will be mapped to the nearest cell indices.
The middle section of the view menu contains a graphical representation of the data domain and
the selected data region. Also present are the data-base coordinate axes, the view rotation axes
(labelled H, V and D) and if the data-set contains volume porosity data there will also be points
indicated to show the location of blocked cells.
The domain outline is shown dotted and the selected region is shown as a solid-line boundary.
Generally speaking the image in the graphics area will change interactively as the view menu
options and parameters are changed. Also this image represents the images that will be produced
in the display area windows. This is not strictly true of target display windows which have a very
different aspect ratio from the view menu graphics area. In these cases the height of the image in
the target window is approximately proportionate to the height of the image in the view menu.
This means that short, wide target windows will show an image which is well in from the left and
right borders if they were touching in the view menu and that tall, thin target windows will
generally loose the left and right edges of the image. It is recommended that the display type be
selected so that the windows match the shape of the domain as closely as possible.
Finally the right most side of the view menu has the options for view orientation manipulation.
These include zoom-in, zoom-out, rotation (about three orthogonal directions) using the indicated
--> H,
--> V and --> D axes and finally image positioning by stepped shifting in a vertical
or horizontal direction. Again these options have immediate visual confirmation from the
graphical area.
These options should be used to orient the data on screen as you require it to be drawn by
subsequent display commands. If you loose sight of the domain or get an obscure view then the