Adobe Acrobat SDK
Multimedia Features (Chapter 9 in PDF Reference)
Adobe® Supplement to the ISO 32000
9.5.2 3D Streams 56
Add the following commentary to the end of Section 9.5.1.
The
Style
and
Window
entries provide the mechanism to present the 3D content in a floating window.
The
Transparent
entry provides a flag for specifying whether the background of a 3D view is rendered
using transparency. If this is the case, some area of the page may be visible through the background if the
resulting alpha value at that location is less than 1.0. See also the
Transparent
entry of the
“RichMediaPresentation Dictionary” on page 82
.
9.5.2 3D Streams
Modify the
Subtype
entry as shown in Table 9.35.
On page 798, delete the sentence that begins “The only valid value …” in the following paragraph. The material
in that sentence is covered in Table 9.35298], as amended by this guide.
The
Subtype
entry specifies the format of the 3D stream data.
The only valid value is U3D, which indicates
that the stream data conforms to the Universal 3D File Format specification
(see Bibliography). PDF
consumer applications must be prepared to encounter unknown values for
Subtype
and recover
appropriately, which usually means leaving the annotation in its inactive state, displaying its normal
appearance.
TABLE 9.34 Entries in a 3D activation dictionary
KEY
TYPE
VALUE
Style
name
(
Optional; ExtensionLevel 3
) Values may be
Embedded
or
Windowed
. A
conforming interactive reader supports both
Embedded
and
Windowed
.
Default value:
Embedded
Window
dictionary
(
Optional; ExtensionLevel 3
) A RichMediaWindow Dictionary that
describes the size and position of the floating user interface window
when the value for
Style
is set to
Windowed
. See
“RichMediaWindow
Dictionary” on page 84
for a detailed description.
Transparent
boolean
(
Optional; ExtensionLevel 3
) A flag that indicates whether the page
content is displayed through the transparent areas of the rich media
content (where the alpha value is less than 1.0).
Default value:
false
TABLE 9.35 Entries in a 3D stream dictionary
KEY
TYPE
VALUE
Subtype
name
(
Required
) A name specifying the format of the 3D data contained in the
stream. The following valid values are supported:
U3D
, which specifies the Universal 3D file format.
PRC
, which specifies the PRC file format. This value is an extension
supported by Acrobat 8.1. (
ExtensionLevel 1)
