geom/doc/salome/gui/GEOM/sketcher.htm

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<title>Sketcher</title>
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<h1>Sketcher</h1>
<p><span style="font-size: 12pt;"><font size=3 style="font-size:12pt;"><b style="font-weight: bold;"><img src="i_blue.jpg" x-maintain-ratio="TRUE" x-save-file="TRUE" x-save-method="compute-relative" width="30px" height="30px" border="0" class="img_whs1"></b></font></span>Sketcher allows to create curves of 2 types: line
segment and arc. &nbsp;The
curve is created from the current point (center of coordinates when the
sketcher is started). &nbsp;The
end of the curve is defined by means of &quot;destination&quot;, which
can be a destination point (for segment only) or destination direction
coupled with length of a segment or angle and radius of an arc.</p>
<p>&nbsp;</p>
<p>Sketcher is able to create planar curves only. Therefore, it is necessary
to select a working plane before starting a sketch (by default, XOY plane
is used). Sketcher creates curves lying in the current working plane (New
Entity -&gt; Basic -&gt; Working Plane).</p>
<p>&nbsp;</p>
<p>This functionality is available from the main menu via <span style="font-style: italic;"><I>New
Entity / Sketch.</I></span></p>
<p>&nbsp;</p>
<p class="whs2"><b><span style="font-weight: normal;">T</span></b><b><span
style="font-weight: normal;">he</span> Result <span style="font-weight: normal;">of
the operation will be a</span></b><b> GEOM_Object</b>.</p>
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<p>&nbsp;</p>
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<p class="whs2"><b style="font-weight: bold;">TUI Command:</b><i>
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</i><span style="font-style: italic;"><I>geompy.MakeSketcher(Command, WorkingPlane)</I></span></p>
<p class="whs3">This algorithm creates
a sketcher (wire or face), following the textual description, passed through
the Command argument. The edges of the resulting wire or face will be
arcs of circles and/or linear segments.</p>
<p class="whs3"><span style="font-style: italic;"><I>Command</I></span>
is a string, defining the sketcher by the coordinates of points in the
local working plane.</p>
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<p class="whs3"><span style="font-style: italic;"><I>WorkingPlane</I></span>
is a planar face of the working plane (a list of 9 doubles which are coordinates
of OZ and OX of the local working plane).</p>
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<p class="whs2">&nbsp;</p>
<p class="whs2"><b style="font-weight: bold;">Arguments:</b>
</p>
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<p class="whs2"><span><font size=3 style="font-size:12pt;">1. Element type (segment or arc).</font></span></p>
<p class="whs2">2. Destination type (point or direction).</p>
<p class="whs2">3. <span>Destination point by means of:</span></p>
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<ul type="disc" class="whs4">
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<li class=kadov-p><p class="whs2">absolute coordinates
X,Y;</p></li>
<li class=kadov-p><p class="whs2">relative coordinates
DX, DY (with respect to the current point);</p></li>
<li class=kadov-p><p class="whs2">selection of an existing
point.</p></li>
</ul>
<p class="whs2">4. Destination direction by means of:</p>
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<ul type="disc" class="whs4">
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<li class=kadov-p><p class="whs2">angle between the new
segment and the previous one;</p></li>
<li class=kadov-p><p class="whs2">perpendicular to the
previous segment (same as previous, but angle is predefined and is equal
to 90 degrees);</p></li>
<li class=kadov-p><p class="whs2">tangent to the previous
segment;</p></li>
<li class=kadov-p><p class="whs2">vector components DX,
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DY.</p></li>
</ul>
<p class="whs2">5. Parameters of an element (for segment :
length or target X or Y coordinate value, for arc : radius and angle).</p>
<p class="whs2">&nbsp;</p>
<p class="whs2"><b style="font-weight: bold;">Dialog Box:</b></p>
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<p class="whs2">&nbsp;</p>
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<p class="whs5"><img src="pics/neo-scetcher1.png" x-maintain-ratio="TRUE" width="321px" height="496px" border="0" class="img_whs6"> &nbsp;&nbsp;<img src="pics/neo-scetcher2.png" x-maintain-ratio="TRUE" width="321px" height="496px" border="0" class="img_whs6"></p>
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<p class="whs7">&nbsp;</p>
<p class="whs8">Example:</p>
<p class="whs9">&nbsp;</p>
<p class="whs9"><img src="image204.jpg" width="200px" height="200px" border="0" class="img_whs10"> &nbsp;&nbsp;<img src="image206.jpg" width="200px" height="200px" border="0" class="img_whs10"></p>
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<p class="whs9">&nbsp;</p>
<p class="whs2">Our <span style="font-weight: bold;"><B>TUI Scripts</B></span>
provide you with useful examples of the use of <a href="sketcher_tui.htm">Sketcher</a>.
</p>
<p>&nbsp;</p>
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