Draft Arc 3Points
|Drafting → Arc tools → Arc by 3 points|
|Introduced in version|
|Draft Arc, Draft Circle|
The Draft Arc 3Points command creates a circular arc in the current working plane by entering three points that lie on its circumference. The center and radius are determined from these three points. It uses the Draft Linestyle set on the Draft Tray.
Arc defined by three points lying on its circumference
- There are several ways to invoke the command:
- Click the first point in the 3D view, or type coordinates and press the button in the related Line task panel.
- Click the second point in the 3D view, or type coordinates and press the button in the related Line task panel.
- Click the third point in the 3D view, or type coordinates and press the button in the related Line task panel.
- Press , or after one point to constrain the following point on the given axis.
- To enter coordinates manually, simply enter the numbers, then press
between each X, Y and Z component.
- You can press the button when you have entered the desired values to insert the point.
(0, 0, 0).
or click the checkbox to toggle relative mode. If relative mode is on, the coordinates of the following point are relative to the previous one; if not, they are absolute, taken from the origin
- Hold constrain your next point horizontally or vertically in relation to the previous one. while drawing to
- Press or the button to abort the command.
- A Draft Arc can be edited with the Draft Edit command.
To create a Draft Arc by 3 points use the
make_arc_3points method of the Draft module:
arc = make_arc_3points(points, placement=None, face=False, support=None, map_mode="Deactivated", primitive=False)
- Creates an
arcobject from the given
- If a
placementis given, the center of the circular arc will be moved to this place. See Placement for more information.
True, the arc will make a face, that is, it will appear filled.
supportis given, it is a
LinkSubList, that is, a list indicating an object and a subelement of that object. This is used so that the object appears referenced to this support.
- For example:
map_modeis given, it is a string defining a type of mapping, for example:
map_mode='ThreePointsPlane', etc. See Part Attachment for more information.
True, the arc created will be a simple Part Feature, not a complex Draft object.
import FreeCAD as App import Draft doc = App.newDocument() points = [App.Vector(0, 0, 0), App.Vector(5, 10, 0), App.Vector(10, 0, 0)] arc = Draft.make_arc_3points(points) doc.recompute()