Appeal No. 2000-1935
Application 08/460,937
The examiner's succeeding views with respect to Foley are
misplaced. At the outset, we note at page 239 that Foley states
that the "view volume bounds that portion of the world that is to
be clipped out and projected onto the view plane." The ensuing
discussion shows in Figures 6.19 through 6.21 area projection
approaches utilizing a more limited view volume defined by a
front clipping plane and a back clipping plane on either side of
the viewing plane itself. These figures do not indicate to us
and, as noted earlier, we are in agreement with appellants' views
as to this issue, that the projection subject image is located
between the view point and a projection plane. The view plane or
projection plane is in the middle of a region bounded by the
front and back clipping planes, which is a viewing volume
essentially smaller than that which may be defined from the
entire volume of three-dimensional images to begin with. This
limited viewing volume we assume the examiner intends to consider
to be analogous to the claimed predetermined region. With this
view we fully agree.
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