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<h1><b style="font-weight: bold;"><span style="font-size: 14pt;"><font size=4 style="font-size:14pt;"><img src="files/salome2_sp3_basicgui_functions_salome2_sp3_basicgui_functions_image31.gif" width="20px" height="20px" border="0" class="img_whs1"> </font></span></b>Arc</h1>
<p><b><span style="font-weight: normal;">T</b>o</span> create an <span
style="font-weight: bold;"><B>Arc</B></span> in the <span style="font-weight: bold;"><B>Main
Menu</B></span> select <span style="font-weight: bold;"><B>New Entity - >
Basic - > Arc</B></span></p>
<p class="whs2"> </p>
<p class="whs3"><b style="font-weight: bold;"><span
style="font-weight: normal;">There are 2 algorithms to create an </span><span
style="font-weight: bold;"><B>Arc</B></span><span style="font-weight: normal;">
in the 3D space. </span></b></p>
<p class="whs2"><b><span style="font-weight: normal;">The Result
of each operation will be a</span></b><b> <span style="font-weight: normal;">GEOM_Object
(edge).</span></b></p>
<p class="whs2"> </p>
<p class="whs2"><b style="font-weight: bold;"><span style="font-weight: normal;">Firstly,
you can define an</span> Arc <span style="font-weight: normal;">by</span>
<span style="font-weight: normal;">three</span><span style="font-weight: bold;"><B>
Points </B></span><span style="font-weight: normal;">that lie on it, where
</span></b>Point1
is the starting point, Point2
is a middle point of the arc and Point3
is the ending point of the arc.</p>
<p class="whs2"><b style="font-weight: bold;">TUI
Command:</b> <span style="font-style: italic;"><I>geompy.MakeArc(Point1,
Point2, Point3)</I></span></p>
<p class="whs2"><b style="font-weight: bold;">Arguments:</b>
Name + 3 vertices.</p>
<p class="whs2"> </p>
<p class="whs4"><img src="pics/arc.png" x-maintain-ratio="TRUE" width="312px" height="359px" border="0" class="img_whs5"></p>
<p class="whs6"> </p>
<p class="whs7"><b style="font-weight: normal;">Secondly,
you can define an <span style="font-weight: bold;"><B>Arc</B></span> by </b><span
style="font-weight: bold;"><B>Center, Start</B></span> and <span style="font-weight: bold;"><B>End</B></span>
points. The arc is built from the <span style="font-weight: bold;"><B>Start</B></span>
point to the <span style="font-weight: bold;"><B>End</B></span> point. The radius
of the arc is defined by the distance between the <span style="font-weight: bold;"><B>Center</B></span>
point and the <span style="font-weight: bold;"><B>Start</B></span> point. The
<span style="font-weight: bold;"><B>End</B></span> point defines the angle of
the arc. If the distance between the <span style="font-weight: bold;"><B>Center</B></span>
point and the <span style="font-weight: bold;"><B>End</B></span> point is not
equal to the radius, the arc will be built anyway.</p>
<p class="whs7"><span style="font-weight: bold;"><B>Reverse</B></span>
radio button allows to change the direction of the arc.</p>
<p class="whs7"><b style="font-weight: bold;">TUI Command:</b>
<span style="font-style: italic;"><I>geompy.MakeArcCenter(Center Point, Start
Point, End Point, boolean Sense)</I></span></p>
<p class="whs7"><span style="font-style: italic;"><I><b
style="font-weight: bold;">A</I></span>rguments:</b> Name + 3 vertices + Boolean.</p>
<p class="whs7"> </p>
<p class="whs4"><img src="pics/arc2.png" x-maintain-ratio="TRUE" width="400px" height="385px" border="0" class="img_whs8"></p>
<p class="whs9"> </p>
<p class="whs9"><b style="font-weight: bold;">Example:</b></p>
<p class="whs9"> </p>
<table x-use-null-cells cellspacing="0" width="86.687%" class="whs10">
<col class="whs11">
<col class="whs12">
<col class="whs13">
<col class="whs13">
<tr valign="top" class="whs14">
<td width="38.452%" class="whs15">
<p>Arc by three points lying on it.</td>
<td width="28.09%" class="whs16">
<p>Arc by Start, End and Center.</td>
<td colspan="1" rowspan="1" width="16.729%" class="whs17">
<p> </td>
<td width="16.729%" class="whs17">
<p>Reversed arc.</td></tr>
<tr valign="top" class="whs14">
<td width="38.452%" class="whs18">
<p class="whs6"><img src="pics/arcsn.png" x-maintain-ratio="TRUE" width="316px" height="270px" border="0" class="img_whs19"></td>
<td width="28.09%" class="whs20">
<p><img src="pics/arcsn1.png" x-maintain-ratio="TRUE" width="212px" height="270px" border="0" class="img_whs21"></td>
<td colspan="1" rowspan="1" width="16.729%" class="whs22">
<table x-use-null-cells cellspacing="0" width="100%" class="whs23">
<col class="whs24">
<tr valign="top" class="whs25">
<td width="100%" class="whs26">
<p class="whs27">Start Point</td></tr>
<tr valign="top" class="whs28">
<td width="100%" class="whs29">
<p> </td></tr>
<tr valign="top" class="whs30">
<td width="100%" class="whs29">
<p> </td></tr>
<tr valign="top" class="whs25">
<td width="100%" class="whs29">
<p>Center Point</td></tr>
<tr valign="top" class="whs31">
<td width="100%" class="whs29">
<p> </td></tr>
<tr valign="top" class="whs25">
<td width="100%" class="whs32">
<p>End Point</td></tr>
</table>
<p class="whs33"> </p>
<p> </td>
<td width="16.729%" class="whs22">
<p><img src="pics/arcsn2.png" x-maintain-ratio="TRUE" width="318px" height="269px" border="0" class="img_whs34"></td></tr>
</table>
<p class="whs35"> </p>
<p class="whs2">Our TUI Scripts provide you with useful examples
of creation of <a href="basic_geometrical_objects.htm">Basic Geometric
Objects</a>. </p>
<p> </p>
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