create_drawing_object_circle_sector — Create a circle sector which can be modified interactively.
create_drawing_object_circle_sector creates a circle sector region which can be modified interactively in a HALCON window by the user. The circle sector is defined by the coordinates Row and Column of the center point, the Radius, and the start and end angle StartAngle and EndAngle.
These parameters can be queried any time with get_drawing_object_params, as well as its corresponding HALCON object with get_drawing_object_iconic.
In addition to those parameters, every drawing object has a number of parameters which determine the appearance of the object in the HALCON window. See set_drawing_object_params for details on the number and meaning of those parameters.
In order to enable the interactive modification with the drawing object, the object must be attached to an existing window. See attach_drawing_object_to_window for further details. Once attached, the circle is editable by the user through interaction with the window. There are three possible transformations for a circle sector object: resizing, displacement and changing the arc angle. The Radius of the circle can be modified by dragging the circular arc. By clicking on the center, the circle sector can be moved across the HALCON window. The angle arc can be modified by dragging the handles of the circle sector.
In contrast to the operator draw_circle, this interaction does not block the calling thread.
Note that since internal structures are allocated during create_drawing_object_circle_sector and the following operators the drawing object should be explicitly freed if it is no longer needed.
This operator returns a handle. Note that the state of an instance of this handle type may be changed by specific operators even though the handle is used as an input parameter by those operators.
Row coordinate of the center.
Default value: 100
Column coordinate of the center.
Default value: 100
Radius of the circle.
Default value: 80
Start angle of the arc.
Default value: 0
End angle of the arc.
Default value: 3.14159
Handle of the drawing object.
If the parameter values are correct the operator create_drawing_object_circle_sector returns the value 2 (H_MSG_TRUE). Otherwise an exception is raised.
attach_drawing_object_to_window, get_drawing_object_params, get_drawing_object_iconic
draw_rectangle1_mod, draw_rectangle2, draw_region, create_drawing_object_circle, create_drawing_object_ellipse_sector
create_drawing_object_rectangle1, create_drawing_object_rectangle2, create_drawing_object_ellipse, create_drawing_object_circle, create_drawing_object_ellipse_sector, create_drawing_object_xld, create_drawing_object_line