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#!CNavyBlue #!N #!Rovedx Overview of Data Explorer #!N
#!EC #!N #!N The Data Explorer graphical user interface allows end
users to perform tasks at various levels of sophistication. For example,
a user can use the user interface to apply data and
adjust input values to an existing visualization process. A slightly more
advanced user can construct a new visualization process, called a visual
program, by connecting a network of Data Explorer's modules. An expert
programmer can create new modules, using C or FORTRAN, for use
with the system modules. Besides the user interface, Data Explorer also
provides a scripting language interface, for users who want to build
their own visualization functions in a more traditional programming style. #!N
#!N Data Explorer's graphical user interface provides an integrated online help
facility. This facility provides users with online access to the Data
Explorer user manuals, as well as with context-sensitive help information. In
addition to the help information provided with Data Explorer, the online
help facility allows users to document various aspects of their particular
visual programs. Other users of these visual programs then have online
access to this program-specific documentation. #!N #!N Data Explorer provides an
extensive set of modules that you can use to visualize your
data. For example, the Isosurface, Streamline, and AutoColor modules perform the
standard visualization functions of creating constant-value surfaces, tracing particle paths through
velocity fields, and coloring objects based on a data value, respectively.
#!N #!N In addition to these expected functions, Data Explorer also
provides tools to perform more sophisticated manipulation of data. The Map
module is a general purpose module that can map a data
field onto an arbitrary object--whether it is a streamline, an isosurface,
or even another data field's computational mesh. The Compute module can
perform arithmetic or trigonometric operations point-by-point not only on your data
but also on the grid itself. Thus warping a grid, for
example, is a simple matter of entering an expression. #!N #!N
Even standard tools, such as Isosurface, operate on multiple types of
input grids. For example, if the input field to Isosurface is
2-dimensional, the module automatically creates contour lines. #!N #!N The Data
Explorer renderer can handle opaque or translucent surfaces, translucent volumes, and
opaque or translucent lines or points--all in the same image. In
addition, data on different computational or observational grids can be visualized
together, allowing you to correlate disparate data fields without requiring you
to force the data onto the same grid. #!N #!N The
power and interoperability of the modules is possible because of the
underlying data model, which is capable of describing a wide variety
of types of input data. Because the data itself is self-describing,
modules can be flexible in the types of data they accept,
and can perform their actions appropriately based on their input. #!N
#!N #!N #!F-adobe-times-medium-i-normal--18* Next Topic #!EF #!N #!N #!Lc11,dxall182 h System Structure #!EL #!N #!F-adobe-times-medium-i-normal--18*
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