Draft Offset
Draft Offset |
Menu location |
---|
Draft → Offset |
Workbenches |
Draft, Arch |
Default shortcut |
O S |
Introduced in version |
- |
See also |
Draft Scale, Part 2D Offset |
Description
The Offset tool moves the selected object by a given distance (offset) perpendicular to itself. If no object is selected, you will be invited to select one.
Typically this tool is used in copy mode to create offset copies of a base object while leaving this object in the same place. The offset copies are scaled versions of the original object. To create other scaled copies use Draft Scale. To produce exact copies shifted a distance use Draft Move.
How to use
- Select objects you wish to offset.
- Press the Draft Offset button, or press O then S keys.
- Click a point on the 3D view, or type a distance.
The distance used to create the offset is perpendicular to one of the edges of the original shape, depending on the position of the pointer. If the pointer is moved closer to another edge, this edge now becomes the reference for the distance. Hold the Shift key to keep the current reference edge despite moving the pointer closer to other edges.
Options
- Press P or click the checkbox to toggle copy mode. If copy mode is on, the Offset tool will keep the original shape in its place but will make a scaled copy at the chosen point.
- Hold Alt while picking the point to also toggle copy mode. Keeping Alt pressed will allow you to continue placing offset copies; release Alt to finish the operation and see all offset shapes.
- Click the "OCC-style" checkbox to toggle OCC mode. This will create an offset from both sides of an line segment, which will produce a specially closed shape with rounded edges at the ends of the segments.
- Note: with this style the original segments will be removed, so use copy mode to preserve the original edges.
- Hold Ctrl while offsetting to force snapping your point to the nearest snap location, independently of the distance.
- Hold Shift to keep the offset distance referred to the current segment, and avoid picking another reference.
- Press Esc or the Close button to abort the current command; offset copies already placed will remain.
Scripting
See also: Draft API and FreeCAD Scripting Basics.
The Offset tool can be used in macros and from the Python console by using the following function:
Offsetobj = offset(obj, delta, copy=False, bind=False, sym=False, occ=False)
- Offsets the given
obj
wire by applying the givendelta
, defined as a vector, to its first vertex. - If
copy
isTrue
another object is created instead of offsetting the original object. - If
bind
isTrue
, and provided the wire object is open, the original and the offset wire will be tied at their endpoints, forming a face.- If
sym
isTrue
,bind
must beTrue
as well, and the offset is made on both sides of the wire, the total width being the length of the given vector.
- If
- If
occ
isTrue
, it will use OCC-style offsetting: it will offset from both sides, then tie the new wires together, and round the corners. Offsetobj
is returned with the original offset object, or with the new copy.
Example:
import FreeCAD, Draft
p1 = FreeCAD.Vector(0, 0, 0)
p2 = FreeCAD.Vector(1500, 2000, 0)
p3 = FreeCAD.Vector(4000, 0, 0)
Wire = Draft.makeWire([p1, p2, p3])
vector = FreeCAD.Vector(0, 500, 0)
Offset_1 = Draft.offset(Wire, vector, copy=True)
Offset_2 = Draft.offset(Wire, 3*vector, copy=True)
Offset_3 = Draft.offset(Wire, 6*vector, copy=True)
Offset_4 = Draft.offset(Wire, 9*vector, copy=True)
Offset_5 = Draft.offset(Wire, 1.5*vector, copy=True, occ=True)