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<TITLE> Description of Objects in VPython</TITLE>
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<H1 CLASS="Heading-1"> <font color="#0000A0">The sphere Object</font></H1>
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Here is an example of how to make a sphere:</P>
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ball = sphere(pos=(1,2,1), radius=0.5)</H2>
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This produces a sphere centered at location (1,2,1) with radius = 0.5, with the current foreground color.</P>
<P CLASS="Normal"> The sphere object has the following attributes and default
values, like those for cylinders except that there is no length attribute:
<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">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>.
As with cylinders, <span class="attribute">up</span> has a subtle effect
on the 3D appearance of a sphere<span class="attribute"><font color="#000000"></font></span>.
The axis attribute only affects the orientation of the sphere and has a
subtle effect on appearance; the magnitude of the axis attribute is irrelevant.
Additional sphere attributes:</P>
<P CLASS="attributes"> <span class="attribute">radius</span> Radius of the
sphere, default = 1</P>
<P CLASS="Normal"> Note that the <span class="attribute">pos</span> attribute
for cylinder, arrow, cone, and pyramid corresponds to one end of the object,
whereas for a sphere it corresponds to the center of the object.</P>
<P CLASS="Normal">Originally there was a label attribute for the sphere object,
but this has been superceded by the <a href="label.html">label object</a>.</P>
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