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ExtensionCreateLengthArc

VerticalExtentDimension

TechDraw

Description

The TechDraw HorizontalExtentDimension tool adds a linear dimension to a View. The dimension extends from the left most point on the selected objects to the right most point.

Horizontal and vertical extent dimensions of a B-spline

Usage

1. Select a View or a collection of Edges in a View.
2. There are several ways to invoke the tool:
   • introduced in 1.0: If the Dimensioning tools preference is set to Single tool (default): press the down arrow to the right of the button and select the Insert Horizontal Extent Dimension option from the dropdown.
   • If this preference has a different value (and in 0.21 and below): press the Insert Horizontal Extent Dimension button.
   • Select the TechDraw → Dimensions → Insert Horizontal Extent Dimension option from the menu.
3. A dimension is added to the View.
4. The dimension may be dragged to the desired position.
5. If needed, add tolerances as described on this page.

Change properties

To change the properties of a dimension object either double-click it in the drawing or in the Tree view. This will open the Dimension dialog.

Limitations

Dimension objects are vulnerable to the "topological naming problem". See TechDraw LengthDimension.

Notes

See TechDraw LengthDimension.

Properties

See TechDraw LengthDimension. Exceptions noted below.

Data

Base

• DataMeasure Type (Enumeration): Not yet implemented for extent dimensions.

Scripting

See also: Autogenerated API documentation and FreeCAD Scripting Basics.

The Horizontal Extent Dimension tool can be used in macros and from the Python console by using the following functions:

selection = ['Edge1', 'Edge2']                      # or [] for all

TechDraw.makeExtentDim(view1, selection, 0)         # view1 is a DrawViewPart; 0 for horizontal
App.ActiveDocument.DimExtent.Y = -60                # offset dimension line from dimensioned edges in Y direction
App.ActiveDocument.DimExtent.X = 10                 # offset dimension text along dimension line in X direction
App.ActiveDocument.DimExtent.FormatSpec = '%.0f'    # Dimension format

TechDraw.makeExtentDim(view1, selection, 1)         # view1 is a DrawViewPart; 1 for vertical
App.ActiveDocument.DimExtent001.X = -130            # offset dimension line from dimensioned edges in X direction
App.ActiveDocument.DimExtent001.Y = 10              # offset dimension text along dimension line in Y direction
App.ActiveDocument.DimExtent001.FormatSpec = '%.0f'

# Note the dimension names are 'DimExtent', 'DimExtent001' etc in the order created.

ExtensionCreateLengthArc

VerticalExtentDimension

TechDraw