Adobe Acrobat SDK
Multimedia Features (Chapter 9 in PDF Reference)
Adobe® Supplement to the ISO 32000
9.5.6 Persistence of 3D Measurements and Markups 68
FIGURE 9.22
An angular measurement markup consists of two anchor points,
FIGURE 9.22
, one located on each of the
two linear entities whose angle is being measured. Connected to each anchor point is an extension line
that is collinear with the edge it measures. A labeled arc, with an arrowhead at each end, connects the two
extension lines, making it clear which angle is being measured.
In addition to the entries in
“TABLE 9.39a Entries in a 3D measurement/markup dictionary” on page 62
, the
following entries are defined for a 3D measurement dictionary with a
Subtype
value of
AD3
for 3D
angular measurement.
TABLE 9.39d Additional entries in a 3D measurement/markup dictionary
for a 3D angular dimension measurement
KEY
TYPE
VALUE
AP
array
(
Required; ExtensionLevel 3
) A three-element array of numbers specifying
the 3D annotation plane on which the measurement markup lies.
A1
array
(
Required; ExtensionLevel 3
) A three-element array of numbers specifying
the model space position of the first anchor point in world space. It is
assumed that this is a position on the 3D model associated with this
view.
D1
array
(
Required; ExtensionLevel 3
) A three-element array of numbers specifying
the direction vector for the leader line associated with the first anchor
point (
A1
).
N1
text string
(
Optional; ExtensionLevel 3
) The name of the part (or model tree node)
associated with anchor point 1 (
A1
). The part name is used to verify that
the part exists and is visible. If not, the measurement is not displayed. If
omitted, no validation occurs.
A2
array
(
Required; ExtensionLevel 3
) A three-element array of numbers specifying
the model space position of the second anchor point in world space. It is
assumed that this is a position on the 3D model associated with this
view.
D2
array
(
Required; ExtensionLevel 3
) A three-element array of numbers specifying
the direction vector for the leader line associated with the second
anchor point (
A2
).
