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      <title>3D curves</title>
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      <div class="title_topic2" id="xps10_pagetitle">3D curves</div>
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      <p class="para_topic">In NX, the equivalent of I-deas 3D curves are non-sketch curves. These curves differ from I-deas 3D curves because they contain associativity and can be edited.</p>
      <p class="para_topic">These curves are created in relation to the WCS coordinate system (not a sketch plane.)</p>
      <p align="center"><img align="bottom" src="graphics/parts/wcs_csys.gif"></p>
      <p class="para_topic">Create 3D curves using the <b class="uiTerm">Insert</b> &rarr; <b class="uiTerm">Curve</b> menu,  also located in the <b class="uiTerm">Curve</b> toolbar.
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            <p class="para_item"><b class="uiTerm">Curve</b> toolbar:
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            <p class="para_item"><img align="bottom" src="graphics/icons/curve-toobar.gif" border="0"> 
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            <p class="para_item">Use the <b class="uiTerm">Basic Curves</b> command to create simple 3D lines, arcs, circles and fillets without associativity.
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                  <p class="para_item"><img align="bottom" src="graphics/icons/icon_basic_curves.gif" border="0"> <b class="uiTerm">Basic Curves</b></p>
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            <p class="para_item">Use the other curve methods to create 3D curves with simple constraints and associativity.</p>
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            <p class="para_item">Use the menu <b class="uiTerm">Insert</b> &rarr; <b class="uiTerm">Curve</b> &rarr; <b class="uiTerm">Lines and Arcs</b> to create associative 3D curves with more complex constraints similar to sketch constraints.
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      <p class="para_topic">The <b class="uiTerm">Lines and Arcs</b> commands are found in the <b class="uiTerm">Lines and Arcs</b> toolbar.
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            <p class="para_item"><b class="uiTerm">Lines and Arcs</b> toolbar:
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            <p class="para_item"><img align="bottom" src="graphics/icons/lines_arcs_toolbar.gif" border="0"> 
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      <p class="para_topic">Operations such as offsets and intersections which derive curve from other curves or geometry are found in the <b class="uiTerm">Insert</b> &rarr; <b class="uiTerm">Curve from Curves</b> and <b class="uiTerm">Curve from Bodies</b> menus.
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      <p class="para_topic">Directly manipulate spines and edit curves using the <b class="uiTerm">Edit</b> &rarr; <b class="uiTerm">Curve</b> menus and the <b class="uiTerm">Edit Curve</b> toolbar.
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            <p class="para_item"><img align="bottom" src="graphics/icons/edit_curve_toolbar.gif" border="0"> <b class="uiTerm">Edit Curve</b> toolbar.
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      <p class="para_topic">See also:</p>
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            <p class="para_item">Help: <img align="bottom" src="graphics/widgets/book_closed.gif" border="0"> Design &rarr; Modeling &rarr; Creating Objects from the Insert Menu &rarr; Curve 
            </p>
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            <p class="para_item">Help: <img align="bottom" src="graphics/widgets/book_closed.gif" border="0"> Design &rarr; Modeling &rarr; Editing Objects&rarr; Curve
            </p>
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