1 .. |arc.icon| image:: images/arc.png
6 Arc feature creates an arc segment in the current Sketch.
8 To add a new Arc to the Sketch:
10 #. select in the Main Menu *Sketch - > Arc* item or
11 #. click |arc.icon| **Arc** button in Sketch toolbar:
13 There are 4 algorithms for creation of an Arc:
15 .. image:: images/arc_base_32x32.png
17 **By center and two points** creates an arc segment with the given center passing from the start point to the end point on the circle.
19 .. image:: images/arc_3pt_32x32.png
21 **By three points** creates an arc segment passing from the start point to end point through another point on the circle.
23 .. image:: images/arc_tang_32x32.png
25 **By tangent point and end point** creates an arc segment with the tangent point and the end point.
27 .. image:: images/arc_perp_32x32.png
29 **By transversal point and end point** creates an arc segment perpendicular to a straight line with the start point, connected with boundary of this line, and the end point.
31 By center and two points
32 """"""""""""""""""""""""
34 .. image:: images/Arc_panel_base.png
37 Click in the view once to set the center point, then move the mouse and click a second time to set the start point
38 and finally move the mouse and click a third time to set the last passed point.
40 - When entering a center or start point by selecting either a point or a segment, a Coincident constraint is created.
41 - When entering an end point by selecting a segment, a Coincident constraint is created.
42 - When entering an end point, only segments are selectable.
46 .. py:function:: Sketch_1.addArc(CenterX, CenterY, StartX, StartY, EndX, EndY, Inversed)
48 :param real: Center X.
49 :param real: Center Y.
54 :param boolean: Is inversed.
55 :return: Result object.
60 .. image:: images/Arc_panel_3pt.png
63 Click in the view once to set the start point, then move the mouse and click a second time to set the end point
64 and finally move the mouse and click a third time to set the passed point.
66 - When entering a start or end point by selecting either a point or a segment, a Coincident constraint is created.
67 - When entering a passing point by selecting a point, a Coincident constraint is created.
68 - When entering a passing point by selecting a segment, a Tangent constraint is created.
72 .. py:function:: Sketch_1.addArc(StartX, StartY, EndX, EndY, PassedX, PassedY)
78 :param real: Passed X.
79 :param real: Passed Y.
80 :return: Result object.
82 By tangent point and point
83 """"""""""""""""""""""""""
85 .. image:: images/Arc_panel_tang.png
88 Select a point on segment in the view to set the tangent point, then move the mouse and click to set the end point.
89 The tangent point by itself is a start point. The edge on which it lies will be tangent to the arc.
91 - When entering a tangent point by selecting a point on segment, a Tangent constraint is created.
92 - When entering an end point by selecting a segment, a Coincident constraint is created.
93 - When entering an end point, only segments are selectable.
97 .. py:function:: Sketch_1.addArc(TangentPoint, EndX, EndY, Inversed)
99 :param object: Tangent Point.
102 :param boolean: Is inversed.
103 :return: Result object.
105 By transveral point and point
106 """""""""""""""""""""""""""""
108 .. image:: images/Arc_panel_perp.png
111 Select a point on a straight segment in the view to set the transversal point, then move the mouse and click to set the end point.
112 The transversal point by itself is a start point. The edge on which it lies will be perpendicular to the arc (the center of the arc is lying on the edge).
114 - When entering a transversal point by selecting a point on segment, a Perpendicular constraint is created.
115 - When entering an end point by selecting a segment, a Coincident constraint is created.
116 - When entering an end point, only segments are selectable.
120 .. py:function:: Sketch_1.addArc(TransversalPoint, EndX, EndY, Inversed, True)
122 :param object: Transversal Point.
125 :param boolean: Is inversed.
126 :param boolean: Arc is transversal (always True).
127 :return: Result object.
132 Created arc appears in the view.
134 .. image:: images/Arc_res.png
140 **See Also** a sample TUI Script of :ref:`tui_create_arc` operation.