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TechDraw_3PtAngleDimension.md

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  • GuiCommand: Name:TechDraw 3PtAngleDimension MenuLocation:TechDraw → Insert 3-Point Angle Dimension Workbenches:TechDraw Version:0.18 SeeAlso:TechDraw AngleDimension

TechDraw 3PtAngleDimension

Description

The 3-Point Angle Dimension tool adds a angular dimension to a View. The dimension may be specified by selecting three Vertices on a View. Note that the second of the three Vertices is the apex of the angle. The Angle3Pt will initially be the projected angle (ie as shown on the drawing), but this may be changed to the actual 3D distance using the TechDraw LinkDimension tool.

*Measuring the angle between two straight lines using three vertices; the second vertex should be the apex of the angle*

Usage

  1. Select the points or edge which define your measurement.
  2. Press the 3-Point Angle Dimension button
  3. A dimension will be added to the View. The dimension may be dragged to the desired position.
  4. If needed, add tolerances as described in this page.

To change the properties of a dimension object either double-clicking 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 for more information.

Properties

See TechDraw LengthDimension.

Scripting

See also:

TechDraw API and FreeCAD Scripting Basics.

The 3-Point Angle Dimension tool can be used in macros and from the Python console by using the following functions:

dim1 = FreeCAD.ActiveDocument.addObject('TechDraw::DrawViewDimension','Dimension')
dim1.Type = "Angle3Pt"
dim1.References2D=[(view1, 'Vertex1',(view1, 'Vertex4'),(view1, 'Vertex2'))]
rc = page.addView(dim1)

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