Table of Contents
Advertisement
Adobe Acrobat SDK
Adobe® Supplement to the ISO 32000
The actual Y-axis is formed by taking the cross product of
determine the orientation of this Y-axis.
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 Perpendicular Dimension Measurement
A perpendicular measurement is used to denote the perpendicular distance between two geometric
entities (normally two lines or a point and a line) as illustrated here.
In these figures, a perpendicular measurement markup consists of two filled circles at the anchor points,
two parallel extension lines (referred to as leader lines) starting at the anchor points and extending away
from the anchor points. There is also a labeled line with arrowheads on both sides (referred to as the
measure line) indicating that the distance shown is the perpendicular distance between the two parallel
lines.
In addition to the entries in
following entries are defined for a 3D measurement dictionary with a
perpendicular measurement.
KEY
AP
A1
N1
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
"TABLE 9.39a Entries in a 3D measurement/markup dictionary" on page
TABLE 9.39c Additional entries in a 3D measurement/markup dictionary
for a 3D perpendicular 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.
Multimedia Features (Chapter 9 in PDF Reference)
9.5.6 Persistence of 3D Measurements and Markups
and (
-
AP
A2
and
, an extension line collinear to the measure
A1
A2
FIGURE 9.20
Subtype
). The part name is used to verify that
A1
) the vector
is used only to
A1
TY
), a units string
V
value of
for 3D
PD3
65
62, the
Advertisement
Table of Contents
