# Arc

To create an Arc in the Main Menu select New Entity - > Basic - > Arc

There are 2 algorithms to create an Arc in the 3D space.

The Result of each operation will be a GEOM_Object (edge).

Firstly, you can define an Arc by three Points that lie on it, where Point1 is the starting point, Point2 is a middle point of the arc and Point3 is the ending point of the arc.

TUI Command: geompy.MakeArc(Point1, Point2, Point3)

Arguments: Name + 3 vertices.

Secondly, you can define an Arc by Center, Start and End points. The arc is built from the Start point to the End point. The radius of the arc is defined by the distance between the Center point and the Start point. The End point defines the angle of the arc. If the distance between the Center point and the End point is not equal to the radius, the arc will be built anyway.

Reverse radio button allows to change the direction of the arc.

TUI Command: geompy.MakeArcCenter(Center Point, Start Point, End Point, boolean Sense)

Arguments: Name + 3 vertices + Boolean.

Example:

Arc by three points lying on it. | Arc by Start, End and Center. |  | Reversed arc.
Start Point
Center Point
End Point

Our TUI Scripts provide you with useful examples of creation of Basic Geometric Objects.