Rysunek Techniczny: Dodaj linię środkową pomiędzy dwoma liniami

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This page is a translated version of the page TechDraw 2LineCenterLine and the translation is 5% complete.
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TechDraw 2LineCenterLine.svg TechDraw 2LineCenterLine

Menu location
TechDraw → Add Lines → Add Centerline between 2 Lines
Workbenches
TechDraw
Default shortcut
None
Introduced in version
0.19
See also
TechDraw Centerline to Face(s), TechDraw Centerline between 2 Points

Description

The 2LineCenterLine tool adds a centerline between two Edges.

CL2LinesSample.png

Aligned centerline between 2 Edges

Usage

  1. Select 2 Edges in a View. The Edges should be more or less parallel.
  2. Press the TechDraw 2LineCenterLine.svg Add Centerline between 2 Lines button
  3. A dialog will open where you can specify attributes of the new centerline.
  4. A centerline will be added between the 2 selected Edges.
    If the generated line looks odd or didn't generate at all, you may need to use the option Flip Ends.

To delete a Centerline, select it and use the toolbar button TechDraw CosmeticEraser.svg Remove Cosmetic Object.

Editing Centerlines

Any of the centerline command buttons ( TechDraw FaceCenterLine.svg Add Centerline to Face(s), TechDraw 2LineCenterLine.svg Add Centerline between 2 Lines, TechDraw 2PointCenterLine.svg Add Centerline between 2 Points) can be used to edit any centerline.

  1. Select a centerline.
  2. Press any centerline command button.
  3. A dialog will open where you can change attributes of the centerline.
  4. Press OK to see your changes.

Properties

Centerlines have no properties of their own, as they are no document objects. They have attributes that can be edited via the dialog.

  • Orientation:
    • Vertical: Forces a centerline vertical
    • Horizontal: Forces a centerline horizontal
    • Aligned: Follows the general direction of the Edge for 2 Edge centerline
  • Shift Horizontal: Moves the centerline left or right of its normal position
  • Shift Vertical: Moves the centerline up or down from its normal position
  • Rotate: Rotates the centerline around its center (degrees. + counterclockwise, - clockwise)
  • Extend By: Makes the centerline longer by this amount
  • Color: Color of centerline
  • Weight: Thickness of the centerline
  • Style: Continuous-line.svg Continuous, Dash-line.svg Dash, Dot-line.svg Dot, DashDot-line.svg DashDot, DashDotDot-line.svg DashDotDot
  • Flip Ends: Flips endpoints for creation as described below. (attribute removed for FreeCAD 0.20)

Flip Ends

Sketch how the centerline is constructed

The centerline between 2 lines is drawn between the midpoints (m0 and m1) of the lines that connects the endpoints of the selected lines (p0 and p1), see the sketch. Depending on the point order there are 2 possibilities to draw the connecting lines. The attribute Flip Ends flips the way the connecting lines are drawn. In FreeCAD 0.20 the point order is automatically determined so that the Flip Ends attribute is no longer necessary.

Scripting

See also: TechDraw API and FreeCAD Scripting Basics.

Centerlines are not accessible from macros or the Python console at this time.