XML Forms Data Format (XFDF) Specification - Adobe Partners

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Appendix: XFDF Definitions for Comments on 3D or Rich Media Annotations XML Forms Data Format Specification Radial Dimension Related Elements 136 The circle being measured is defined by two points lying on the annotation plane, a circle center A1, and a point on the circle A2. For radial measurement, the text position (TP) controls the text string position, the arrow line orientation, and the extension line. The arrow line is drawn from the text position (TP) to the intersection point between the circle and a line from the text position to the circle center. The extension line is drawn from the text position (TP) in the direction of the text string’s X axis (TX); and the length of the extension line is defined by the EL parameter. The left center of the measure value string begins at the end of the extension line. Vector TX is expected to be orthogonal with the annotation plane normal. The text’s up direction is defined as the cross product of the annotation plane normal and the text’s X axis, in the direction defined by the TY parameter. There are three parts to the text string displayed with the measurement; a numeric value, a units string, and an optional user string. The display of the numeric value field number is also controlled by the precision value, which indicates how many digits to the right of the decimal point should be displayed. The viewer can convert the numeric value to a string and combine it with the units string and user text as appropriate; this process is viewer dependent. The parameters for defining a radial dimension for an arc are very similar to that used for a circle, as displayed in the following figure. The key difference for an arc is that there are two additional points defining the start and end position for the arc. In addition for the arc, it is possible for the text position to be defined, such that an extension arc having arrowhead on either end needs to be generated. There is an optional parameter ‘showcircle’ that defines whether the underlying model circle or arc should be redrawn in the markup color to emphasize what is being measured. The following is an example of an instance of a radial dimension. Measurement1
Appendix: XFDF Definitions for Comments on 3D or Rich Media Annotations XML Forms Data Format Specification radialmarkup 137 -0.006086 -0.999982 0.000000 -0.000191 -0.186570 0.033149 -0.008900 -0.186500 0.029300 0.004600 -0.186600 0.041400 0.009100 -0.186600 0.031200 Shaft 0.000392 -0.186573 0.064191 0.881165 -0.005363 -0.472779 0.472770 -0.002877 0.881181 20.000000 0.000000 1.000000 0.000000 0.009541 cm 3 36.000000 radialmarkup The radialmarkup tag is a container that holds the data defining an instance of a radial measurement of circular geometry. Content model (annoplane & circlecenter & pointoncircle & arcstart & arcend & anchorpartname & textposition & textydirection & textsize & markupcolor & value & units & precision & usertext & extensionlength) Attributes showcircle diameter Optional Boolean. If true, will display the underlying circle associated with a radial dimension. The default is not to show the circle. Optional Radius/Diameter indicator. If true, the measurement value associated with a radial measurement represents a diameter as opposed to a radius value. The default is Radius. annoplane The annoplane tag contains a list of three doubles defining the normal for the 3D annotation plane on which the measurement markup will lie. Content model A list of three doubles. Attributes None.
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Introduction to XFDF XML Forms Data
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XFDF Reference XML Forms Data Forma
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XML Forms Data Format (XFDF) Specification - Adobe Partners

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