geom/doc/salome/gui/GEOM/point.htm
2006-02-07 15:58:35 +00:00

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<title>Point</title>
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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_image27.gif" width="20px" height="20px" border="0" class="img_whs1"> </font></span></b>Point</h1>
<p>To create a <span style="font-weight: bold;"><B>Point</B></span> in the <span
style="font-weight: bold;"><B>Main Menu</B></span> select <span style="font-weight: bold;"><B>New
Entity - &gt; Basic - &gt; Point</B></span></p>
<p>&nbsp;</p>
<p>There are three algorithms to <span style="font-size: 12pt;"><font size=3 style="font-size:12pt;">create
a </font></span><span style="font-size: 12pt; font-weight: bold;"><font size=3 style="font-size:12pt;"><B>Point</B></font></span><span
style="font-size: 12pt;"><font size=3 style="font-size:12pt;"> in the 3D space.</font></span></p>
<p class="whs2"><b style="font-weight: bold;"><span style="font-weight: normal;">Each
time the</span> Result <span style="font-weight: normal;">of the operation
will be a</span></b> GEOM_Object (vertex).</p>
<p class="whs2">&nbsp;</p>
<p class="whs2"><b style="font-weight: bold;"><span style="font-weight: normal;">Firstly,
we can define a point by setting its X, Y and Z </span><span style="font-weight: bold;"><B>C</B></span></b><b><span
style="font-weight: bold;"><B>oordinates</B></span><span style="font-weight: normal;">.</span>
</b></p>
<p class="whs2"><b style="font-weight: bold;">TUI Command :</b>
&nbsp;&nbsp;<span style="font-style: italic;"><I>g</I></span>eompy.MakeVertex(X,
Y, Z) </p>
<p class="whs2"><b style="font-weight: bold;">Arguments: </b>Name
<b><span style="font-weight: normal;">(Vertex_n by default) </span></b>+
X, Y and Z coordinates of the point.</p>
<p class="whs2">&nbsp;</p>
<p class="whs2"><img src="pics/point1.png" x-maintain-ratio="TRUE" width="312px" height="332px" border="0" class="img_whs3"></p>
<p class="whs2">&nbsp;</p>
<p class="whs2">Secondly, &nbsp;we
can define a point by a <span style="font-weight: bold;"><B>Reference</B></span>
to another point and the shift of the coordinates of the new point regarding
the coordinates of the old one. </p>
<p class="whs2"><b style="font-weight: bold;">TUI Command :</b>
&nbsp;&nbsp;<span style="font-style: italic;"><I>geompy.MakeVertexWithRef(Reference,
X, Y, Z).</I></span></p>
<p class="whs2"><b style="font-weight: bold;">Arguments: </b>Name
+ 1 reference point + 3 coordinates defining the position of this point
regarding the reference one.</p>
<p class="whs2">&nbsp;</p>
<p class="whs2"><span style="font-style: italic;"><I><img src="pics/neo-point2.png" x-maintain-ratio="TRUE" width="312px" height="473px" border="0" class="img_whs4"></I></span></p>
<p class="whs5">&nbsp;</p>
<p class="whs6">Finally, we can define a
point by an <span style="font-weight: bold;"><B>Edge</B></span> and a <span style="font-weight: bold;"><B>Parameter</B></span>
&nbsp;indicating
its position on the Edge. For example, 0.5 means that the point is located
in the middle of the edge.<span style="font-style: italic;"> <I></I></span></p>
<p class="whs7"><span style="font-style: italic;"><I><b style="font-weight: bold; font-style: normal;">TUI
Command :</b> &nbsp;&nbsp;geompy.MakeVertexOnCurve(Edge,
Parameter).</I></span></p>
<p class="whs2"><b style="font-weight: bold;">Arguments: N</b>ame
+ 1 edge &nbsp;+
1 Parameter defining the position of the point on the given edge.</p>
<p class="whs2">&nbsp;</p>
<p class="whs2"><span style="font-style: italic;"><I><b style="font-weight: bold;"><img src="pics/point3.png" x-maintain-ratio="TRUE" width="312px" height="421px" border="0" class="img_whs8"></b></I></span></p>
<p class="whs2">&nbsp;</p>
<p class="whs9"><span style="font-style: italic;"><I><span
style="font-size: 12pt; color: #000000;"><font size=3 color=black style="font-size:12.000000pt;"><b style="font-weight: bold;"><b
style="font-weight: bold;">E</b>xample:</b></font></span></I></span></p>
<p class="whs10">&nbsp;</p>
<p class="whs2"><span style="font-style: italic;"><I><b style="font-weight: bold;"><img src="pics/points.png" x-maintain-ratio="TRUE" width="354px" height="326px" border="0" class="img_whs11"></b></I></span></p>
<p class="whs12">&nbsp;</p>
<p class="whs2">Our <span style="font-weight: bold;"><B>TUI Scripts</B></span>
provide you with useful examples of creation of <a href="basic_geometrical_objects.htm#bookmark" style="font-style: normal;">Basic
Geometric Objects</a>. </p>
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