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SWN_getExtent
A library function which returns the size of the smallest rectangle, all of whose faces
are parallel to an axis, which contains the all the element whose names match the passed
specification. An extent is different from a bounding box, because a bounding box has no
constraints on the orientation of its faces.
package require SWN
SWN_getExtent namePattern
namePattern
specifies the elements whose extent will be returned.
Return Value
If the function succeeds it returns a list defining the extents of each of the specified
elements. Each such extent is defined by a list consisting of six numeric elements,
namely: minx,maxx,miny,maxy,minz and maxz. This means that if the namePattern specifies
more than a single element the procedure returns a list of lists If an error occurs the
procedure returns a string describing that error.
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SWN_getExtent