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 measurename 118 measurename The measurename tag defines the user visible name for the 3D measurement or comment. Content model Text String. Attributes None. Linear Dimension Related Elements A linear measurement is a markup showing the distance between two arbitrary points on a 3D model. An example is displayed in the following figure. As displayed in the figure above, 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). The measure line is labeled with a value representing the distance between the two anchor points. As displayed in the figure below, the value text is drawn on the Annotation Plane (AP) where the horizontal text path is defined by the vector from Anchor Point 1 (A1) to Anchor Point 2 (A2) with the text up direction defined by the vector TY. The lower left corner of the text box is positioned at the text anchor point (TP).
Appendix: XFDF Definitions for Comments on 3D or Rich Media Annotations XML Forms Data Format Specification linearmarkup 119 The actual Y axis is formed by taking the cross product of AP and (A2 – A1); the vector TY is only used to determine the orientation of this Y axis. If the text position TP is outside the area between A1 and A2, an extension line collinear to the measure line connecting TP to the closest anchor point is generated. 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. The following is an example of a linear dimension. Measurement1 -0.981099 0.122982 0.149397 -0.051400 -0.019600 0.052200 Base -0.050300 -0.065700 0.052100 Base -0.050994 -0.036613 0.052163 0.150717 0.001452 0.988576 20.000000 0.000000 1.000000 0.000000 0.056113 cm 3 linearmarkup The linearmarkup tag is a container that holds the data defining an instance of a point to point measurement. Content model (annoplane & anchor1 & anchor1partname & anchor2 & anchor2partname & textposition & textydirection & textsize & markupcolor & value & units & precision & usertext) Attributes None. 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.
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XML Forms Data Format Specification
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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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