Descriere
Un element primitiv geometric este Circle care este disponibil din dialogul Create Primitives în Atelierul de lucru Part.
Această comandă va crea o muchie curbată circulară. Cu valorile implicite, muchia curbată circulară va fi închisă și, prin urmare, va fi un cerc. Dacă proprietățile Unghi 0 sau Unghi 1 sunt modificate din valorile implicite (0 și 360) marginea va fi o curbă deschisă, un arc de cerc.
A Part Circle is in fact a closed counterclockwise circular arc, it can be turned into an arc by changing its Date Angle1 and/or Date Angle2 properties.
Usage
See Part Primitives .
A Part Circle can alternatively be created by selecting three points:
In the task panel of the Part Primitives command select the Circle option from the dropdown list.
Press the From three points button.
Select three vertices in the 3D View . There is no need to hold down the Ctrl key.
A circle is created.
The selected vertices are only used at creation time to calculate the Date Radius and Date Placement of the circle.
Example
Part Circle from the scripting example
A Part Circle object created with the scripting example below is shown here.
Proprietăți
Crearea unui cerc sau a unui arc de cerc parametric.
Utilizăm meniul Crea primitive... → Cerchio . Și apare o fereastră de dialog. Se deschide un dialog care vă permite să setați:
Primitive Geometrice
Cercul
Parametri
Raza
Unghiul 1
Unghiul 2
Cerc definit din trei puncte
See also: Property View .
A Part Circle object is derived from a Part Feature object and inherits all its properties. It also has the following additional properties:
Data
Attachment
The object has the same attachment properties as a Part Part2DObject .
Base
Radius : raza muchiei curbate (arc or circle)
Angle 0 : Unghiul de pornire a muchiei curbate, (degrees anti-clockwise), valoara implictă este 0
Angle 1 : Unghiul de capăt al muchiei curbate, (degrees sens antiorar/trigonometric), valoarea implictă este 360
Scripting
See also: Autogenerated API documentation , Part scripting and FreeCAD Scripting Basics .
A Part Circle can be created with the addObject() method of the document:
circle = FreeCAD . ActiveDocument . addObject ( "Part::Circle" , "myCircle" )
Where "myCircle" is the name for the object.
The function returns the newly created object.
Example:
import FreeCAD as App
doc = App . activeDocument ()
circle = doc . addObject ( "Part::Circle" , "myCircle" )
circle . Radius = 10
circle . Angle1 = 45
circle . Angle2 = 225
circle . Placement = App . Placement ( App . Vector ( 1 , 2 , 3 ), App . Rotation ( 30 , 45 , 10 ))
doc . recompute ()
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