Sketcher CreateEllipseBy3Points/ro: Difference between revisions

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{{Docnav
{{Docnav
|[[Sketcher_CreateEllipseByCenter|Ellipse]]
|[[Sketcher_CreateEllipseByCenter|Ellipse by center]]
|[[Sketcher_CreateArcOfEllipse|Arc of ellipse]]
|[[Sketcher_CreateArcOfEllipse|Arc of ellipse]]
|[[Sketcher_Workbench|Sketcher]]
|[[Sketcher_Workbench|Sketcher]]
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==Descriere==
==Descriere==


The [[Image:Sketcher_CreateEllipseBy3Points.svg|24px]] [[Sketcher_CreateEllipseBy3Points|Sketcher CreateEllipseBy3Points]] tool creates an ellipse by the endpoints of one of its axes and a point along the ellipse. {{Version|1.0}}: This is the same tool as [[Sketcher_CreateEllipseByCenter|Sketcher CreateEllipseByCenter]] but with a different initial mode.
This tool draws an ellipse by picking three points : (1) the periapsis (first crossing of longer diameter with ellipse), (2) the apoapsis (second crossing of longer diameter with ellipse), (3) one point on a side of the longer diameter (a) defining the minor radius (b). (c) is the resulting center and (f) are the focal points.

When starting the tool, the mouse pointer changes to a white cross with a red ellipse icon.

[[Image:Ellipse_3Point.png‎]]
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====Utiolizare====
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<span id="Usage"></span>
<span id="Usage"></span>
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See also: [[Sketcher_Workbench#Drawing_aids|Drawing aids]].
* Press the {{Button|[[File:Sketcher_CreateEllipseBy3Points.svg|16px]] [[Sketcher_CreateEllipseBy3Points|Create ellipse by 3 points]]}} button.
* First click in 3D view sets a point that defines the crossing of the major diameter with the ellipse (periapsis). Second click in 3D view sets a point that defines the crossing of the major diameter with the ellipse opposite to the center point (apoapsis). Third click sets a point on the ellipsis defining the minor radius.


# There are several ways to invoke the tool:
* After the third click, the ellipse is created, together with a set of construction geometry aligned to it (major diameter, minor diameter, two foci). The construction geometry can be manually deleted if not needed, and recreated later. See [[Sketcher_RestoreInternalAlignmentGeometry|Sketcher Show Hide Internal Geometry]].
#* Press the {{Button|[[Image:Sketcher_CreateEllipseBy3Points.svg|16px]] [[Sketcher_CreateEllipseBy3Points|Ellipse by axis endpoints, rim point]]}} button.
* Pressing {{KEY|ESC}} or clicking the right mouse button cancels the function.
#* Select the {{MenuCommand|Sketcher → Sketcher geometries → [[Image:Sketcher_CreateEllipseBy3Points.svg|16px]] Create ellipse by 3 points}} option from the menu.
#* Use the keyboard shortcut: {{KEY|G}} then {{KEY|3}}, then {{KEY|E}}.
# For further steps see [[Sketcher_CreateEllipseByCenter#Usage|Sketcher CreateEllipseByCenter]].


==Peculiarities==
==Notes==


See [[Sketcher_CreateEllipseByCenter#Notes|Sketcher CreateEllipseByCenter]].
* Major and minor axes of ellipses are strict and cannot be swapped by resizing the ellipse. This is a consequence of the solver parametrization used (center (x,y), focus1 (x,y) and minor radius length (b)) and the same strict behavior of OpenCascade. The ellipse must be rotated to swap the axes.
* Ellipse can function as a circle when its major and minor diameter lines are deleted, and one of the foci is constrained to coincide with the center. But radius constraint won't work on such a circle.
* Moving the ellipse by edge is the same as moving ellipse's center.




{{Docnav
{{Docnav
|[[Sketcher_CreateEllipseByCenter|Ellipse]]
|[[Sketcher_CreateEllipseByCenter|Ellipse by center]]
|[[Sketcher_CreateArcOfEllipse|Arc of ellipse]]
|[[Sketcher_CreateArcOfEllipse|Arc of ellipse]]
|[[Sketcher_Workbench|Sketcher]]
|[[Sketcher_Workbench|Sketcher]]

Latest revision as of 11:01, 23 April 2024

Sketcher CreateEllipse3Point

poziția meniului
Sketch → Sketcher geometries → Create ellipse by 3 points
Ateliere
Sketcher
scurtătură
nici unul
Prezentat în versiune
0.15
A se vedea, de asemenea,
Sketcher Ellipse by center, Sketcher Circle, Sketcher Arc of Ellipse

Descriere

The Sketcher CreateEllipseBy3Points tool creates an ellipse by the endpoints of one of its axes and a point along the ellipse. introduced in version 1.0: This is the same tool as Sketcher CreateEllipseByCenter but with a different initial mode.

Versiune

See also: Drawing aids.

  1. There are several ways to invoke the tool:
    • Press the Ellipse by axis endpoints, rim point button.
    • Select the Sketcher → Sketcher geometries → Create ellipse by 3 points option from the menu.
    • Use the keyboard shortcut: G then 3, then E.
  2. For further steps see Sketcher CreateEllipseByCenter.

Notes

See Sketcher CreateEllipseByCenter.