Draft Mirror

    From FreeCAD Documentation

    Draft Mirror.svg Draft Mirror

    Menu location
    Modification → Mirror
    Workbenches
    Draft, Arch
    Default shortcut
    M I
    Introduced in version
    -
    See also
    Draft Clone

    Description

    The Draft Mirror.svg Draft Mirror command creates mirrored copies, Part Mirror objects, from selected objects. A Part Mirror object is parametric, it will update if its source object changes.

    The command can be used on 2D objects created with the Draft Workbench or Sketcher Workbench, but also on many 3D objects such as those created with the Part Workbench, PartDesign Workbench or Arch Workbench.

    Draft Mirror example.jpg

    Mirroring an object

    Usage

    See also: Draft Snap and Draft Constrain.

    1. Optionally select one or more objects.
    2. There are several ways to invoke the command:
      • Press the Draft Mirror.svg Draft Mirror button.
      • Select the Modification → Draft Mirror.svg Mirror option from the menu.
      • Use the keyboard shortcut: M then I.
    3. If you have not yet selected an object: select an object in the 3D view.
    4. The Mirror task panel opens. See Options for more information.
    5. Pick the first point of the mirror plane in the 3D view, or type coordinates and press the Draft AddPoint.svg Enter point button.
    6. Pick the second point of the mirror plane in the 3D view, or type coordinates and press the Draft AddPoint.svg Enter point button.
    7. The mirror plane is defined by the selected points and the normal of the Draft working plane.

    Options

    The single character keyboard shortcuts mentioned here can be changed. See Draft Preferences.

    • To manually enter coordinates enter the X, Y and Z component, and press Enter after each. Or you can press the Draft AddPoint.svg Enter point button when you have the desired values. It is advisable to move the pointer out of the 3D view before entering coordinates.
    • Press R or click the Relative checkbox to toggle relative mode. If relative mode is on, the coordinates of the second point are relative to the first point, else they are relative to the coordinate system origin.
    • Press G or click the Global checkbox to toggle global mode. If global mode is on, coordinates are relative to the global coordinate system, else they are relative to the working plane coordinate system. introduced in version 0.20
    • Press S to switch Draft snapping on or off.
    • Press Esc or the Close button to abort the command.

    Notes

    Preferences

    See also: Preferences Editor and Draft Preferences.

    • To change the number of decimals used for the input of coordinates: Edit → Preferences... → General → Units → Units settings → Number of decimals.

    Properties

    See also: Property editor.

    A Part Mirror object is derived from a Part Feature object and inherits all its properties. It also has the following additional properties:

    Data

    Base

    • DataSource (Link): specifies the object that is mirrored.

    Plane

    • DataBase (Vector): specifies the base point of the mirror plane.
    • DataNormal (Vector): specifies the normal direction of the mirror plane.

    Scripting

    See also: Autogenerated API documentation and FreeCAD Scripting Basics.

    To mirror objects use the mirror method of the Draft module.

    mirrored_list = mirror(objlist, p1, p2)
    
    • objlist contains the objects to be mirrored. It is either a single object or a list of objects.
    • p1 is the first point of the mirror plane.
    • p2 is the second point of the mirror plane.
    • If the Draft working plane is available the alignment of the mirror plane is determined by its normal, else the view direction of the camera in the active 3D view is used. If the graphical interface is not available the Z axis is used.
    • mirrored_list is returned with the new Part::Mirroring objects. It is either a single object or a list of objects, depending on objlist.

    Example:

    import FreeCAD as App
    import Draft
    
    doc = App.newDocument()
    
    place = App.Placement(FreeCAD.Vector(1000, 0, 0), App.Rotation())
    polygon1 = Draft.make_polygon(3, 750)
    polygon2 = Draft.make_polygon(5, 750, placement=place)
    
    p1 = App.Vector(2000, -1000, 0)
    p2 = App.Vector(2000, 1000, 0)
    
    line1 = Draft.make_line(p1, p2)
    mirrored1 = Draft.mirror(polygon1, p1, p2)
    
    Line2 = Draft.make_line(-p1, -p2)
    mirrored2 = Draft.mirror([polygon1, polygon2], -p1, -p2)
    
    doc.recompute()