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Adobe Acrobat SDK
Adobe® Supplement to the ISO 32000
KEY
UT
S
The following figure illustrates the parameters associated with the perpendicular dimension.
FIGURE 9.21
annotation plane (as defined by
The lower-left corner of the text box is positioned at the text anchor point (
aligned with the measure line. The text will flow in the direction defined by a vector from
text's up direction is defined as the cross product of the annotation plane normal and the text X-axis, in the
direction defined by the
In addition to controlling text position, the text anchor point (
lines and the placement of the measure line. Because the leader lines are parallel and the measure line
must be perpendicular to both leader lines, the intersection of the leader lines and the measure line is
easily computed.
If the text position
line connecting
There are three parts to the text string displayed with the measurement: a numeric value (
(
), and an optional user string (
U
precision value (
viewer should convert the numeric value to a string and combine it with the units string and user text as
appropriate. This process is viewer dependent.
3D Angular Dimension Measurement
An angular measurement is used to denote the angle between two linear entities, as shown here.
TABLE 9.39c Additional entries in a 3D measurement/markup dictionary
for a 3D perpendicular dimension measurement
TYPE
VALUE
text string
(Optional; ExtensionLevel 3) A string defined by the user that is
appended to the end of the measurement value string. If omitted, no
string is appended.
dictionary
(Optional; ExtensionLevel 3) A comment reference is an indirect reference
to a projection annotation that may be associated with this 3D
measurement. See
page
shows the measure markup and parameters. All the markup items are drawn on the
). The text layout is defined in a similar manner as for linear dimensions.
AP
parameter.
TY
is outside the area between
TP
to the closest anchor point is generated.
TP
). The display of the numeric value field number is also controlled by the
UT
), which indicates how many digits to display to the right of the decimal point. The
P
Multimedia Features (Chapter 9 in PDF Reference)
9.5.6 Persistence of 3D Measurements and Markups
"3D Measurements and Projection Annotations" on
75.
FIGURE 9.21
and
, an extension line collinear to the measure
A1
A2
), and the text's X-axis is
TP
) also controls the lengths of the leader
TP
67
to
. The
A1
A2
), a units string
V
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