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#!N
#!N #!Rflec
Faces, Loops, and Edges Components #!N #!N #!N The "faces," "loops,"
and "edges" components are used for special-purpose applications, such as fonts
or geometric models. The "faces" component represents a set of faces,
each described as a set of loops. Each entry in the
face Array is a single integer index into the "loops" Array
identifying the first of a consecutive set of loops for this
face. The loops are listed in order of the faces they
are associated with, so that the list of loops for face
#!F-adobe-times-medium-i-normal--18* i #!EF ends in the loops Array just before the
first loop for face #!F-adobe-times-medium-i-normal--18* i+1 #!EF . Each entry in
the "loops" Array is a single integer index into the "edges"
Array, identifying the first of a consecutive set of edges for
this loop. The edges are listed in order of the loops
they are associated with, so that the list of edges for
loop #!F-adobe-times-medium-i-normal--18* i #!EF in the edges Array ends just before
the first edge for loop #!F-adobe-times-medium-i-normal--18* i+1 #!EF . Each entry
in the edges Array is a single integer index into the
"points" Array identifying one vertex of an edge; the other vertex
of an edge is the next entry in the "edges" Array,
except that the last edge in a loop that connects the
last point to the first point is not listed explicitly. This
is illustrated in #!Ledarray26,dxall220 f Figure 26 #!EL . #!Cbrown #!N #!F-adobe-times-medium-r-normal--18* #!Redarray26 #!N #!N
Graphics omitted from Online Documentation. Please see the manual. #!N Figure
26. Use of Faces, Loops, and Edge Components #!EF #!N #!EC
#!N #!N It is assumed that the first loop for each
face is the enclosing loop, and that subsequent loops, if any,
are holes in the face. If this is not true, then
set the DX_NESTED_LOOPS environment variable (see #!Lmorevar,dxall695 h Other Environment Variables #!EL ). However, setting this
environment variable will cause a decrease in performance when processing faces,
loops, and edges data. #!N #!N #!N #!F-adobe-times-medium-i-normal--18* Next Topic #!EF
#!N #!N #!Legnpols,dxall221 h Edges and Polylines #!EL #!N #!F-adobe-times-medium-i-normal--18* #!N
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