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| APPROX
Reduction of data
size and patch sizes of CATIA surface models
Data transfer through neutral interfaces
from different CAD systems into CATIA through neutral interfaces
frequently lead to an excessive amount of data and creates CATIA model
data that are too large to be handled easily. Breaking down the model
to a smaller size using the different approximation techniques offered
by CATIA is a tedious and time consuming activity. APPROX can help the
Catia user to get this job done in just a fraction of time.
APPROX is a CATIA integrated application
that allows the reduction of the data size of CATIA models that have
been created from neutral files such like VDAFS or IGES files.
A side effect of interfacing is the fact
that other CAD systems create surfaces in such a way that the resulting
surface in CATIA is built up from many irregular and small patches.
Also faces describing the relevant part of the geometry are often
placed on surfaces that are very much larger than needed. And curves
are built up from many arcs.
APPROX reduces automatically the data
size by reducing and simplifying the existing surfaces and curves.
The reduction of data is achieved
applying two different methods:
• Reduction:
The supporting surfaces of the relevant
faces are reduced (trimmed) to the size necessary to represent the face.
This reduction is not done exactly at the
minimal position, but the result surface will have an addendum around
that face.
Isolated curves are approximated by
another curve with the given tolerance. Curves that represent the
boundaries of CATIA surfaces (faces), are approximated prior to
projection onto the new surface.
•Approximation:
A surface composed of many irregular
patches is approximated by another surface of possibly higher degree
but with a much smaller number of patches. The tolerance for the
approximation is defined by the user.
A curve composed of many arcs is
approximated by another curve of possibly higher degree but with a much
smaller number of arcs. The tolerance for the approximation is defined
by the user. |
