1 <!DOCTYPE html PUBLIC
"-//W3C//DTD XHTML 1.0 Transitional//EN" "xhtml1-transitional.dtd">
2 <!-- saved from url=(0013)about:internet -->
3 <?xml-stylesheet type=
"text/xsl" href=
"mathml.xsl"?><html xmlns=
"http://www.w3.org/1999/xhtml" xmlns:
pref=
"http://www.w3.org/2002/Math/preference" pref:
renderer=
"mathplayer-dl"><head><meta http-equiv=
"Content-Type" content=
"text/html; charset=UTF-8" /><title>gluSphere
</title><meta name=
"generator" content=
"DocBook XSL Stylesheets V1.73.2" /></head><body><div class=
"refentry" lang=
"en" xml:
lang=
"en"><a id=
"gluSphere"></a><div class=
"titlepage"></div><div class=
"refnamediv"><h2>Name
</h2><p>gluSphere — draw a sphere
</p></div><div class=
"refsynopsisdiv"><h2>C Specification
</h2><div class=
"funcsynopsis"><table border=
"0" summary=
"Function synopsis" cellspacing=
"0" cellpadding=
"0"><tr><td><code class=
"funcdef">void
<b class=
"fsfunc">gluSphere
</b>(
</code></td><td>GLUquadric*
</td><td><var class=
"pdparam">quad
</var>,
</td></tr><tr><td> </td><td>GLdouble
</td><td><var class=
"pdparam">radius
</var>,
</td></tr><tr><td> </td><td>GLint
</td><td><var class=
"pdparam">slices
</var>,
</td></tr><tr><td> </td><td>GLint
</td><td><var class=
"pdparam">stacks
</var><code>)
</code>;
</td></tr></table></div></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"parameters"></a><h2>Parameters
</h2><div class=
"variablelist"><dl><dt><span class=
"term"><em class=
"parameter"><code>quad
</code></em></span></dt><dd><p>
4 Specifies the quadrics object (created with
<a class=
"citerefentry" href=
"gluNewQuadric.xml"><span class=
"citerefentry"><span class=
"refentrytitle">gluNewQuadric
</span></span></a>).
5 </p></dd><dt><span class=
"term"><em class=
"parameter"><code>radius
</code></em></span></dt><dd><p>
6 Specifies the radius of the sphere.
7 </p></dd><dt><span class=
"term"><em class=
"parameter"><code>slices
</code></em></span></dt><dd><p>
8 Specifies the number of subdivisions around the
<span class=
"emphasis"><em>z
</em></span> axis
9 (similar to lines of longitude).
10 </p></dd><dt><span class=
"term"><em class=
"parameter"><code>stacks
</code></em></span></dt><dd><p>
11 Specifies the number of subdivisions along the
<span class=
"emphasis"><em>z
</em></span> axis
14 </p></dd></dl></div></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"description"></a><h2>Description
</h2><p>
15 <code class=
"function">gluSphere
</code> draws a sphere of the given radius centered around the origin. The
16 sphere is subdivided around the
<span class=
"emphasis"><em>z
</em></span> axis into slices and along the
17 <span class=
"emphasis"><em>z
</em></span> axis
18 into stacks (similar to lines of longitude and latitude).
20 If the orientation is set to
<code class=
"constant">GLU_OUTSIDE
</code>
21 (with
<a class=
"citerefentry" href=
"gluQuadricOrientation.xml"><span class=
"citerefentry"><span class=
"refentrytitle">gluQuadricOrientation
</span></span></a>), then any normals generated
22 point away from the center of the sphere.
23 Otherwise, they point toward the center of the sphere.
25 If texturing is turned on (with
<a class=
"citerefentry" href=
"gluQuadricTexture.xml"><span class=
"citerefentry"><span class=
"refentrytitle">gluQuadricTexture
</span></span></a>), then texture
27 generated so that
<span class=
"emphasis"><em>t
</em></span> ranges from
0.0 at
28 <mml:math xmlns:
mml=
"http://www.w3.org/1998/Math/MathML" overflow=
"scroll">
31 <mml:mi mathvariant=
"italic">z
</mml:mi>
35 <mml:mi mathvariant=
"italic">radius
</mml:mi>
40 <mml:math xmlns:
mml=
"http://www.w3.org/1998/Math/MathML" overflow=
"scroll">
43 <mml:mi mathvariant=
"italic">z
</mml:mi>
45 <mml:mi mathvariant=
"italic">radius
</mml:mi>
48 (
<span class=
"emphasis"><em>t
</em></span> increases linearly along longitudinal
50 and
<span class=
"emphasis"><em>s
</em></span> ranges from
0.0 at the +
<span class=
"emphasis"><em>y
</em></span> axis, to
0.25 at the
51 +
<span class=
"emphasis"><em>x
</em></span> axis,
52 to
0.5 at the \-
<span class=
"emphasis"><em>y
</em></span> axis, to
0.75 at the \-
<span class=
"emphasis"><em>x
</em></span> axis, and back to
1.0
53 at the +
<span class=
"emphasis"><em>y
</em></span> axis.
54 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"seealso"></a><h2>See Also
</h2><p>
55 <a class=
"citerefentry" href=
"gluCylinder.xml"><span class=
"citerefentry"><span class=
"refentrytitle">gluCylinder
</span></span></a>,
56 <a class=
"citerefentry" href=
"gluDisk.xml"><span class=
"citerefentry"><span class=
"refentrytitle">gluDisk
</span></span></a>,
57 <a class=
"citerefentry" href=
"gluNewQuadric.xml"><span class=
"citerefentry"><span class=
"refentrytitle">gluNewQuadric
</span></span></a>,
58 <a class=
"citerefentry" href=
"gluPartialDisk.xml"><span class=
"citerefentry"><span class=
"refentrytitle">gluPartialDisk
</span></span></a>,
59 <a class=
"citerefentry" href=
"gluQuadricOrientation.xml"><span class=
"citerefentry"><span class=
"refentrytitle">gluQuadricOrientation
</span></span></a>,
60 <a class=
"citerefentry" href=
"gluQuadricTexture.xml"><span class=
"citerefentry"><span class=
"refentrytitle">gluQuadricTexture
</span></span></a>
61 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"Copyright"></a><h2>Copyright
</h2><p>
62 Copyright
<span class=
"trademark"></span>©
1991-
2006
63 Silicon Graphics, Inc. This document is licensed under the SGI
64 Free Software B License. For details, see
65 <a class=
"ulink" href=
"http://oss.sgi.com/projects/FreeB/" target=
"_top">http://oss.sgi.com/projects/FreeB/
</a>.
66 </p></div></div></body></html>