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Multimedia Features (Chapter 9 in PDF Reference)
This section describes extensions to the PDF specification contained in the
PDF Reference, sixth edition,
version 1.7
and in ISO 32000 (
Document management - Portable document format - PDF 1.7
). The latter
document is the version of the PDF specification that has been ratified by the ISO. These documents differ
as described in
About the ISO Draft of the PDF 1.7 Reference
.
Note:
This guide uses italics to identify information not intended for inclusion in the PDF specification. For
convenience, the phrase
BaseVersion 1.7, Adobe ExtensionLevel 3
is shortened to
ExtensionLevel 3
throughout this document.
9.5 3D Artwork
On page 790, append the indicated sentence to the bullet that begins, “3D stream contain …”. Unchanged
content is shown in gray.
The following sections describe the major PDF objects that relate to 3D artwork, as well as providing
background information on 3D graphics:
●
3D annotations provide a virtual camera through which the artwork is viewed. (see section 9.5.1 [ISO
section 13.6.2], “3D Annotations”).
●
3D streams contain the actual specification of a piece of 3D artwork (see section 9.5.2 ISO
section 13.6.3], “3D Streams”). This specification supports the standard ECMA-363, Universal 3D file
format developed by the 3D Industry Forum (see Bibliography).
Extension level 1 extends PDF to
support the PRC file format (see
Bibliography
).
9.5.1 3D Annotations
Add the
3DU
entry to Table 9.33.
Add the
Style
,
Window
, and
Transparent
entries to Table 9.34.
TABLE 9.33 Additional entries specific to a 3D annotation
KEY
TYPE
VALUE
3DU
dictionary
(
Optional; ExtensionLevel 3
) A
3D units dictionary
that specifies the units
definitions for the 3D data associated with this annotation. See
“TABLE
9.33a Entries in a 3D units dictionary” on page 60
.
