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 Perpendicular Dimension Related Elements 124 In the above figure, red items are the measure markup and black items are parameters. All markup items are drawn on the Annotation Plane (AP). The text layout is defined in the similar manner as for linear dimensions. The lower left corner of the text box is positioned at the Text Anchor Point (TP) and the text’s X axis is aligned with the measure line and the text flows in the direction defined by a vector from Anchor Point 1 (A1) to Anchor Point 2 (A2). The 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 TY parameter. In addition to controlling text position, the Text Anchor Point (TP) also controls the lengths of leader lines and the placement of the measure line. Since leader lines are parallel and the measure line must be perpendicular to both leader lines, the intersection of leader lines and the measure line is easily computed. 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 perpendicular measurement. Measurement1 -1.000000 -0.000000 -0.000000 -0.051400 0.000000 0.000000 Base -0.051400 -0.152400 0.000000 0.000000 -0.000000 -1.000000 -0.051400 -0.057428 -0.017686 -0.000000 -0.000000 1.000000 20.000000 0.000000 1.000000 0.000000 0.152400 cm 3
Appendix: XFDF Definitions for Comments on 3D or Rich Media Annotations XML Forms Data Format Specification perpendicularmarkup 125 perpendicularmarkup The perpendicularmarkup tag is a container that holds the data defining an instance of a perpendicular measurement between two geometric items. Content model (annoplane & anchor1 & anchor1partname & anchor2 & anchor2partname & leaderdirection & 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. Content model A list of three doubles. Attributes anchor1 None. The anchor1 tag contains a list of three doubles defining 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. Content model A list of three doubles. Attributes None. anchor1partname The anchor1partname tag defines the node name for the part that the point anchor1 lies on. Content model Text String.
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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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