80 lines
6.4 KiB
HTML
80 lines
6.4 KiB
HTML
<html><head><title>Sketcher Ellipse/ru</title><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><link type='text/css' href='wiki.css' rel='stylesheet'></head><body><h1>Sketcher Ellipse/ru</h1></div>
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<div id="mw-content-text" lang="ru" dir="ltr" class="mw-content-ltr"><hr/><div class="mw-parser-output"><table class="fcinfobox wikitable ct" >
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<td class="ctTitle">
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<h3><span class="mw-headline" id="Sketcher_CreateEllipse"><a href="https://www.freecadweb.org/wiki/index.php?title=File:Sketcher_CreateEllipse.png" class="image"><img alt="Sketcher CreateEllipse.png" src="32px-Sketcher_CreateEllipse.png" width="32" height="32" srcset="/wiki/images/thumb/7/76/Sketcher_CreateEllipse.png/48px-Sketcher_CreateEllipse.png 1.5x, /wiki/images/7/76/Sketcher_CreateEllipse.png 2x" /></a> Sketcher CreateEllipse</span></h3>
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</td></tr>
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<th class="ctOdd">Расположение в меню
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</th></tr>
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<td class="ctEven">Sketch → Геометрия эскиза →Начертить эллипс по центру
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</td></tr>
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<tr>
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<th class="ctOdd">Верстаки
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</th></tr>
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<td class="ctEven"><a href="https://www.freecadweb.org/wiki/index.php?title=Sketcher_Workbench/ru" title="Sketcher Workbench/ru">Sketcher</a>, <a href="https://www.freecadweb.org/wiki/index.php?title=PartDesign_Workbench/ru" title="PartDesign Workbench/ru">Part Design</a>
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</td></tr>
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<tr>
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<th class="ctOdd">Быстрые клавиши
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</th></tr>
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<td class="ctEven">отсутствуют
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</td></tr>
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<th class="ctOdd">См. также
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</th></tr>
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<td class="ctEven"><a href="https://www.freecadweb.org/wiki/index.php?title=Sketcher_Ellipse_by_3_Points/ru" title="Sketcher Ellipse by 3 Points/ru">Начертить эллипс по 3 точкам</a>, <a href="https://www.freecadweb.org/wiki/index.php?title=Sketcher_Circle/ru" title="Sketcher Circle/ru">Sketcher Circle</a>, <a href="https://www.freecadweb.org/wiki/index.php?title=Sketcher_Arc_of_Ellipse/ru" title="Sketcher Arc of Ellipse/ru">Начертить дугу эллипса</a>
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</td></tr>
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<td class="ctToc"><br /><div id="toc" class="toc"><div class="toctitle"><h2>Contents</h2></div>
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<ul>
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<li class="toclevel-1"><a href="#Sketcher_CreateEllipse"><span class="tocnumber">1</span> <span class="toctext">Sketcher CreateEllipse</span></a>
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<ul>
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<li class="toclevel-2 tocsection-1"><a href="#Description"><span class="tocnumber">1.1</span> <span class="toctext">Description</span></a></li>
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<li class="toclevel-2 tocsection-2"><a href="#Usage"><span class="tocnumber">1.2</span> <span class="toctext">Usage</span></a></li>
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<li class="toclevel-2 tocsection-3"><a href="#Peculiarities"><span class="tocnumber">1.3</span> <span class="toctext">Peculiarities</span></a></li>
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<li class="toclevel-2 tocsection-4"><a href="#Version"><span class="tocnumber">1.4</span> <span class="toctext">Version</span></a></li>
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</ul>
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</li>
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</ul>
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</div>
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</td></tr></table>
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<p><br />
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</p>
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<h4><span class="mw-headline" id="Description">Description</span></h4>
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<p>This tool draws an ellipse by picking three points: the center, the end of major radius, the minor radius.
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When starting the tool, the mouse pointer changes to a white cross with a red ellipse icon. Besides are coordinates shown in real time.
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</p>
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<div class="thumb tnone"><div class="thumbinner" style="width:502px;"><a href="https://www.freecadweb.org/wiki/index.php?title=File:Sketcher_EllipseExample1.png" class="image"><img alt="" src="500px-Sketcher_EllipseExample1.png" width="500" height="204" class="thumbimage" srcset="/wiki/images/thumb/6/63/Sketcher_EllipseExample1.png/750px-Sketcher_EllipseExample1.png 1.5x, /wiki/images/6/63/Sketcher_EllipseExample1.png 2x" /></a> <div class="thumbcaption"><div class="magnify"><a href="https://www.freecadweb.org/wiki/index.php?title=File:Sketcher_EllipseExample1.png" class="internal" title="Enlarge"></a></div>The sequence of clicks is indicated by yellow arrows with numbers. C is the center, a - major diameter, b - minor diameter, F1, F2 are foci.</div></div></div>
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<h4><span class="mw-headline" id="Usage">Usage</span></h4>
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<ul><li> Invoke the command by clicking a toolbar button, picking the menu item, or by using keyboard shortcut (needs to be assigned first in <a href="Interface_Customization.html" title="Interface Customization">Interface Customization</a>).</li>
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<li> First click in 3D view sets ellipse center. Second click sets the first radius and orientation of the ellipse. Third click sets the other radius (the distance from the line defined by first two clicks is the second radius). </li>
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<li> 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 <a href="Constraint_Internal_Alignment.html" title="Constraint Internal Alignment">Internal Alignment Constraint</a> and <a href="Sketcher_Show_Hide_Internal_Geometry.html" title="Sketcher Show Hide Internal Geometry">Sketcher Show Hide Internal Geometry</a>.</li>
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<li> Pressing <span style="background: #DDDDDD; border: 1px solid #888888; padding: 0px 5px 1px 5px;">ESC</span> or clicking the right mouse button cancels the function.</li></ul>
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<h4><span class="mw-headline" id="Peculiarities">Peculiarities</span></h4>
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<ul><li> 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.</li>
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<li> 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.</li>
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<li> Moving the ellipse by edge is the same as moving ellipse's center.</li></ul>
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<h4><span class="mw-headline" id="Version">Version</span></h4>
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<p>Introduced in FreeCAD v0.15.4309
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</p>
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</div>
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</div>
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</div><div class="printfooter">
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Online version: "<a dir="ltr" href="https://www.freecadweb.org/wiki/index.php?title=Sketcher_Ellipse/ru&oldid=197904">http://www.freecadweb.org/wiki/index.php?title=Sketcher_Ellipse/ru&oldid=197904</a>"</div>
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<div id="catlinks" class="catlinks" data-mw="interface"></div><div class="visualClear"></div>
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</div>
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</div>
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<div id="mw-navigation">
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<h2>Navigation menu</h2>
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</body></html> |