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Adobe Acrobat SDK
Adobe® Supplement to the ISO 32000
3D Linear Dimension Measurement
A 3D linear measurement is a markup showing the distance between two arbitrary points on a 3D model.
Here is an example.
As shown, a 3D linear measurement consists of two filled circles, called anchor points, one at each of the two
positions being measured, and a line with an arrowhead on each end connecting the two anchor points
(referred to as the measure line). This line is then labeled with a value representing the distance between
the two anchor points.
In addition to the entries in
following entries are defined for a 3D measurement dictionary with a
measurement.
KEY
AP
A1
N1
A2
N2
TP
"TABLE 9.39a Entries in a 3D measurement/markup dictionary" on page
TABLE 9.39b Additional entries in a 3D measurement/markup dictionary
for a 3D linear dimension measurement
TYPE
VALUE
array
(Required; ExtensionLevel 3) A three-element array of numbers specifying
the 3D annotation plane on which the measurement markup will lie.
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.
text string
(Optional; ExtensionLevel 3) The name of the part (or model tree node)
associated with anchor point 1 (
the part exists and is visible. If not, the measurement is not displayed. If
omitted, no validation occurs.
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.
text string
(Optional; ExtensionLevel 3) The name of the part (or model tree node)
associated with anchor point 2 (
the part exists and is visible. If not, the measurement is not displayed. If
omitted, no validation occurs.
array
(Required; ExtensionLevel 3) A three-element array of numbers specifying
the text anchor point for the measurement value string.
Multimedia Features (Chapter 9 in PDF Reference)
9.5.6 Persistence of 3D Measurements and Markups
FIGURE 9.18
Subtype
). The part name is used to verify that
A1
). The part name is used to verify that
A2
62, the
value of
for 3D linear
LD3
63
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