acis_tutorials_(math_classes).htm

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	result = api_stop_modeller<span class="br0">&#40;</span><span class="br0">&#41;</span>;
	CHECK_RESULT
&nbsp;
	<span class="kw1">return</span> <span class="nu0">0</span>;
<span class="br0">&#125;</span></pre>
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<p>In addition to seeing how the topology, geometry and math classes are used in the above example, some of the output might be of interest.
</p>
<ul><li> The original face and its underlying surface have identical parameterizations, which are symmetric in the u and v directions.
</li><li> The u and v derviatives of the original surface point in the +y and +x directions and the face normal points in the -z direction.  (The +u direction was obtained from the first edge of the wire body.  Can you modify the position array to create a surface with the u and v directions in the +x and +y directions?)
</li><li> After the split the parameter ranges of the faces and their underlying surfaces are quite different. The surface underlying each face was not trimmed or subsetted to the range of the face.
</li><li> The faces after the split share the same underlying surface. 
</li><li> If the u parameter ranges of the faces after the split were combined, they would be equivalent to the u parameter range of the face before the split.
</li><li> Although the face was split along the u=0 parameter line, the u parameter ranges of the faces after the split do not fall precisely along the u=0 parameter line.  They are slightly larger than that.
</li><li> If the 3D bounding boxes of the faces after the split were combined, they would be equivalent to the 3D bounding box of the face before the split.  However, notice that each of the bounding boxes of the split faces is slightly larger than 1/2 the original bounding box.  This is because the parameter ranges of the faces are slightly larger than 1/2 the original face.
</li></ul>
<p>&nbsp;<br/>&nbsp;<br/>&nbsp;<br/>&nbsp;<br/>
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<p>The <b>ACIS Tutorials</b> contain discussions and examples that will introduce you to ACIS concepts and terminology, and demonstrate how to successfully use ACIS.  Each tutorial builds upon prior tutorials; therefore, we suggest that new users proceed through these tutorials sequentially.  It is expected that new users will be familiar with programming in C++ and their development environment before beginning these tutorials.  In addition it is expected that new users will have at least a basic understanding of topology and geometry.  
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<div style="float:right; margin-top: 0.0em; margin-bottom:3px; background-color: #e3e5e7; padding: .2em .6em; font-size: 130%; border:1px solid #A3B1BF;"><b>Continue:</b> <b><a href="/r18/index.php/Tutorial:ACIS_Tutorials_%28ACIS_Tolerances%29" title="Tutorial:ACIS Tutorials (ACIS Tolerances)">Tolerances</a></b> <span style="font-size: larger; font-weight: bold;"></span>
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