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<languages/>
{{GuiCommand|Name=Draft_Arc|Workbenches=[[Draft Module|Draft]]|MenuLocation=Draft -> Arc}}
<translate>


<!--T:18-->
====Description====
{{Docnav
|[[Draft_Fillet|Fillet]]
|[[Draft_Arc_3Points|Arc 3Points]]
|[[Draft_Workbench|Draft]]
|IconL=Draft_Fillet.svg
|IconR=Draft_Arc_3Points.svg
|IconC=Workbench_Draft.svg
}}


<!--T:1-->
This tool draws an arc by picking four points: the center, the radius, the start angle and the end angle.
{{GuiCommand
|Name=Draft Arc
|MenuLocation=Drafting → Arc tools → Arc
|Workbenches=[[Draft_Workbench|Draft]], [[Arch_Workbench|Arch]]
|Shortcut={{KEY|A}} {{KEY|R}}
|Version=0.7
|SeeAlso=[[Draft_Arc_3Points|Draft Arc 3Points]], [[Draft_Circle|Draft Circle]]
}}


==Description== <!--T:2-->
[[Image:Draft_Arc_example.jpg]]


<!--T:21-->
====Usage====
The [[Image:Draft_Arc.svg|24px]] '''Draft Arc''' command creates a circular arc on the current [[Draft_SelectPlane|working plane]] from a center, a radius, a start angle and an aperture angle. The radius and the angles can be defined by picking points.


<!--T:22-->
* Pick points on an empty area of the 3d view, or on an existing object.
A Draft Arc is in fact a [[Draft_Circle|Draft Circle]] with a {{PropertyData|First Angle}} that is not the same as its {{PropertyData|Last Angle}}.
* The arc tool inherits the [[Draft Circle|Circle tool]] functionality for its two first steps, so you can press {{KEY|ALT}} to pick a tangent instead of center or radius.
* Pressing {{KEY|CTRL}} will [[Draft_Snap|snap]] your point to availible snap locations.
* Pressing {{KEY|SHIFT}} will [[Draft_Constrain|constrain]] your new point in relation to the last one.
* Enter numbers to [[Draft_Coordinates|manually insert a coordinate]].
* The newly created line will take the current [[Draft_Linestyle|linestyle]].
* Pressing {{KEY|ALT}} when choosing the end angle will switch you to counter-clockwise direction.
* Pressing {{KEY|ESC}} cancels the function.


</translate>
[[Image:Draft_Arc_example.jpg|400px]]
<translate>
<!--T:3-->
{{Caption|Arc defined by four points, center, radius, initial point of arc and final point of arc}}


==Usage== <!--T:23-->
{{languages | {{se|Draft Arc/se}} }}

<!--T:24-->
See also: [[Draft_Tray|Draft Tray]], [[Draft_Snap|Draft Snap]] and [[Draft_Constrain|Draft Constrain]].

<!--T:4-->
# There are several ways to invoke the command:
#* Press the {{Button|[[Image:Draft_Arc.svg|16px]] [[Draft_Arc|Arc]]}} button.
#* Select the {{MenuCommand|Drafting → Arc tools → [[Image:Draft_Arc.svg|16px]] Arc}} option from the menu.
#* Use the keyboard shortcut: {{KEY|A}} then {{KEY|R}}. {{Version|0.20}}
# The {{MenuCommand|Arc}} task panel opens. See [[#Options|Options]] for more information.
# Pick the first point, the center of the arc, in the [[3D_view|3D view]], or type coordinates and press the {{Button|[[Image:Draft_AddPoint.svg|16px]] Enter point}} button.
# Pick the second point in the [[3D_view|3D view]], or enter a {{MenuCommand|Radius}}.
# Pick the third point in the [[3D_view|3D view]], or enter a {{MenuCommand|Start angle}}.
# Pick the fourth point in the [[3D_view|3D view]], or enter an {{MenuCommand|Aperture angle}}.

==Options== <!--T:25-->

<!--T:26-->
The single character keyboard shortcuts available in the task panel can be changed. See [[Draft_Preferences|Draft Preferences]]. The shortcuts mentioned here are the default shortcuts (for version 0.22).

<!--T:5-->
* To manually enter the coordinates for the center enter the X, Y and Z component, and press {{KEY|Enter}} after each. Or you can press the {{Button|[[Image:Draft_AddPoint.svg|16px]] Enter point}} button when you have the desired values. It is advisable to move the pointer out of the [[3D_view|3D view]] before entering coordinates.
* Press {{KEY|G}} or click the {{MenuCommand|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 [[Draft_SelectPlane|working plane]] coordinate system. {{Version|0.20}}
* Press {{KEY|N}} or click the {{MenuCommand|Continue}} checkbox to toggle continue mode. If continue mode is on, the command will restart after finishing, allowing you to continue creating arcs.
* Press {{KEY|S}} to switch [[Draft_Snap|Draft snapping]] on or off.
* Press {{KEY|Esc}} or the {{Button|Close}} button to abort the command.

==Notes== <!--T:27-->

<!--T:11-->
* A Draft Arc can be edited with the [[Draft_Edit|Draft Edit]] command.

==Preferences== <!--T:30-->

<!--T:31-->
See also: [[Preferences_Editor|Preferences Editor]] and [[Draft_Preferences|Draft Preferences]].

<!--T:32-->
* If the {{MenuCommand|Edit → Preferences... → Draft → General → Create Part primitives if possible}} option is checked, the command will create a [[Part_Circle|Part Circle]] instead of a Draft Circle.

==Properties== <!--T:28-->

<!--T:6-->
See [[Draft_Circle#Properties|Draft Circle]].

==Scripting== <!--T:29-->

<!--T:7-->
See also: [https://freecad.github.io/SourceDoc/ Autogenerated API documentation] and [[FreeCAD Scripting Basics|FreeCAD Scripting Basics]].

<!--T:15-->
To create a Draft Arc use the {{incode|make_circle}} method ({{Version|0.19}}) of the Draft module. This method replaces the deprecated {{incode|makeCircle}} method.

<!--T:16-->
Example:

</translate>
{{Code|code=
import FreeCAD as App
import Draft

doc = App.newDocument()

arc1 = Draft.make_circle(200, startangle=0, endangle=90)
arc2 = Draft.make_circle(500, startangle=20, endangle=160)
arc3 = Draft.make_circle(750, startangle=-30, endangle=-150)

doc.recompute()
}}
<translate>


<!--T:17-->
{{Docnav
|[[Draft_Fillet|Fillet]]
|[[Draft_Arc_3Points|Arc 3Points]]
|[[Draft_Workbench|Draft]]
|IconL=Draft_Fillet.svg
|IconR=Draft_Arc_3Points.svg
|IconC=Workbench_Draft.svg
}}

</translate>
{{Draft Tools navi{{#translation:}}}}
{{Userdocnavi{{#translation:}}}}

Latest revision as of 10:03, 30 January 2024

Draft Arc

Menu location
Drafting → Arc tools → Arc
Workbenches
Draft, Arch
Default shortcut
A R
Introduced in version
0.7
See also
Draft Arc 3Points, Draft Circle

Description

The Draft Arc command creates a circular arc on the current working plane from a center, a radius, a start angle and an aperture angle. The radius and the angles can be defined by picking points.

A Draft Arc is in fact a Draft Circle with a DataFirst Angle that is not the same as its DataLast Angle.

Arc defined by four points, center, radius, initial point of arc and final point of arc

Usage

See also: Draft Tray, Draft Snap and Draft Constrain.

  1. There are several ways to invoke the command:
    • Press the Arc button.
    • Select the Drafting → Arc tools → Arc option from the menu.
    • Use the keyboard shortcut: A then R. introduced in version 0.20
  2. The Arc task panel opens. See Options for more information.
  3. Pick the first point, the center of the arc, in the 3D view, or type coordinates and press the Enter point button.
  4. Pick the second point in the 3D view, or enter a Radius.
  5. Pick the third point in the 3D view, or enter a Start angle.
  6. Pick the fourth point in the 3D view, or enter an Aperture angle.

Options

The single character keyboard shortcuts available in the task panel can be changed. See Draft Preferences. The shortcuts mentioned here are the default shortcuts (for version 0.22).

  • To manually enter the coordinates for the center enter the X, Y and Z component, and press Enter after each. Or you can press the 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 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 N or click the Continue checkbox to toggle continue mode. If continue mode is on, the command will restart after finishing, allowing you to continue creating arcs.
  • Press S to switch Draft snapping on or off.
  • Press Esc or the Close button to abort the command.

Notes

  • A Draft Arc can be edited with the Draft Edit command.

Preferences

See also: Preferences Editor and Draft Preferences.

  • If the Edit → Preferences... → Draft → General → Create Part primitives if possible option is checked, the command will create a Part Circle instead of a Draft Circle.

Properties

See Draft Circle.

Scripting

See also: Autogenerated API documentation and FreeCAD Scripting Basics.

To create a Draft Arc use the make_circle method (introduced in version 0.19) of the Draft module. This method replaces the deprecated makeCircle method.

Example:

import FreeCAD as App
import Draft

doc = App.newDocument()

arc1 = Draft.make_circle(200, startangle=0, endangle=90)
arc2 = Draft.make_circle(500, startangle=20, endangle=160)
arc3 = Draft.make_circle(750, startangle=-30, endangle=-150)

doc.recompute()