RailwayRouteOptimization/scripts/Draw/Spline/SplineControlPoints/doc/SplineControlPoints_ru.html

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<title>Сплайн (контрольные точки)</title>
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<p style="text-align:right;"><a href="/doc/qcad/latest/reference/ru/index.php?page=scripts/Draw/Spline/SplineControlPoints/doc/SplineControlPoints">&#160;&#160;&#160;&#160;&#160;&#160;</a></p>
<p style="font-style: italic;">Это автоматический перевод.</p>
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<h2>Сплайн (контрольные точки)</h2>
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<b>Панель инструментов / Иконка:</b>
<br /><img src="../../doc/Spline.png" width="40" height="40" />
&#160;&#160;&#160;
<img src="../doc/SplineControlPoints.png" width="40" height="40" />
&#160;&#160;&#160;
<br/>
<b>Меню:</b> <font face="courier new">Начертить &gt; Сплайн &gt; Сплайн (контрольные точки)</font>
<br /><b>Горячая клавиша:</b> <font face="courier new">S, P</font>
<br /><b>Команды:</b> <font face="courier new">spline | sp</font>
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<h3>Описание</h3>
<p>Draws spline curves from control points. Non-uniform rational B-Splines
(NURBS) with homogeneous weighting factors are the only splines that are
supported.</p>
<h3>Использование</h3>
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<ol>
  <li>Choose the degree of the spline in the options tool bar. Supported degrees
  are 2 (quadratic b-spline) and 3 (cubic b-spline). The higher the degree, the
  'smoother' the curve becomes. 
  <br />Note that a quadratic b-spline requires by definition at least 3
  control points while a cubic b-spline has at least 4 control points.</li>
  <li>Check the 'Closed' check box in the options tool bar if you want to create
  a closed spline. Closed splines are continuous closed loops.</li>
  <li>Specify the control points. After defining the third (for quadratic
  b-splines) or fourth (for cubic b-splines) control point, a preview will be
  shown. You can remove the last control point again by clicking the 'Undo' 
  button in the options tool bar.</li>
</ol>

<p>
Example for two open splines (quadratic and cubic):
<br/>
<img src="SplineControlPoints01.png" class="figure"/>
<br/>
Example for two closed, periodic splines (quadratic and cubic):
<br/>
<img src="SplineControlPoints02.png" class="figure"/>
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