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<h1 class="Heading-1"> <font color="#0000a0">The helix Object</font></h1>
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<p class="Normal">The following statement will display a helix that is
parallel to the x axis:</p>
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<h2 class="program0">spring = helix(pos=(0,2,1), axis=(5,0,0),
radius=0.5)</h2>
<p class="Normal"> The helix object has the following attributes and
default values: <span class="attribute">pos<font color="#000000">
(0,0,0)</font></span>, <span class="attribute">x</span><span
class="attribute"><font color="#000000"> (0)</font></span>, <span
class="attribute">y<font color="#000000">(0)</font></span>, <span
class="attribute">z<font color="#000000">(0)</font></span>, <span
class="attribute">axis<font color="#000000"> (1,0,0)</font></span>, <span
class="attribute">length<font color="#000000"> (1)</font></span>, <span
class="attribute">radius<font color="#000000"> </font></span>(0.2), <span
class="attribute">coils </span>(5), <span class="attribute">thickness
</span>(radius/20), <span class="attribute">color<font color="#000000">
(1,1,1) which is color.white</font></span>, <span class="attribute">red<font
color="#000000"> (1)</font></span>, <span class="attribute">green<font
color="#000000"> (1)</font></span>, <span class="attribute">blue<font
color="#000000"> (1)</font></span>, and <span class="attribute">up<font
color="#000000"> (0,1,0)</font></span>. </p>
<p class="Normal">Note that the <span class="attribute">pos</span>
attribute for cylinder, arrow, cone, pyramid, and helix corresponds to
one end of the object, whereas for a box, sphere, or ring it
corresponds to the center of the object. </p>
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