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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>gluDisk
</title><meta name=
"generator" content=
"DocBook XSL Stylesheets V1.73.2" /></head><body><div class=
"refentry" lang=
"en" xml:
lang=
"en"><a id=
"gluDisk"></a><div class=
"titlepage"></div><div class=
"refnamediv"><h2>Name
</h2><p>gluDisk — draw a disk
</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">gluDisk
</b>(
</code></td><td>GLUquadric*
</td><td><var class=
"pdparam">quad
</var>,
</td></tr><tr><td> </td><td>GLdouble
</td><td><var class=
"pdparam">inner
</var>,
</td></tr><tr><td> </td><td>GLdouble
</td><td><var class=
"pdparam">outer
</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">loops
</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>inner
</code></em></span></dt><dd><p>
6 Specifies the inner radius of the disk (may be
0).
7 </p></dd><dt><span class=
"term"><em class=
"parameter"><code>outer
</code></em></span></dt><dd><p>
8 Specifies the outer radius of the disk.
9 </p></dd><dt><span class=
"term"><em class=
"parameter"><code>slices
</code></em></span></dt><dd><p>
10 Specifies the number of subdivisions around the
<span class=
"emphasis"><em>z
</em></span> axis.
11 </p></dd><dt><span class=
"term"><em class=
"parameter"><code>loops
</code></em></span></dt><dd><p>
12 Specifies the number of concentric rings about the origin into which
13 the disk is subdivided.
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">gluDisk
</code> renders a disk on the
<span class=
"emphasis"><em>z
</em></span> =
0 plane. The disk has a radius of
16 <em class=
"parameter"><code>outer
</code></em> and contains a concentric circular hole with a radius
17 of
<em class=
"parameter"><code>inner
</code></em>. If
<em class=
"parameter"><code>inner
</code></em> is
0, then no hole is generated. The disk is
18 subdivided around the
<span class=
"emphasis"><em>z
</em></span> axis into slices (like pizza slices) and also
19 about the
<span class=
"emphasis"><em>z
</em></span> axis into rings
20 (as specified by
<em class=
"parameter"><code>slices
</code></em> and
<em class=
"parameter"><code>loops
</code></em>, respectively).
22 With respect to orientation, the +
<span class=
"emphasis"><em>z
</em></span> side of the disk is considered to be
23 ``outside'' (see
<a class=
"citerefentry" href=
"gluQuadricOrientation.xml"><span class=
"citerefentry"><span class=
"refentrytitle">gluQuadricOrientation
</span></span></a>).
24 This means that if the
25 orientation is set to
<code class=
"constant">GLU_OUTSIDE
</code>, then any normals generated
26 point along the +
<span class=
"emphasis"><em>z
</em></span> axis. Otherwise, they point along the \-
<span class=
"emphasis"><em>z
</em></span>
29 If texturing has been turned on (with
<a class=
"citerefentry" href=
"gluQuadricTexture.xml"><span class=
"citerefentry"><span class=
"refentrytitle">gluQuadricTexture
</span></span></a>),
30 texture coordinates are generated
31 linearly such that where
32 <mml:math xmlns:
mml=
"http://www.w3.org/1998/Math/MathML" overflow=
"scroll">
35 <mml:mi mathvariant=
"italic">r
</mml:mi>
37 <mml:mi mathvariant=
"italic">outer
</mml:mi>
40 the value at (
<span class=
"emphasis"><em>r
</em></span>,
0,
0) is
41 (
1,
0.5), at (
0,
<span class=
"emphasis"><em>r
</em></span>,
0) it is (
0.5,
1), at (\-
<span class=
"emphasis"><em>r
</em></span>,
0,
0)
43 at (
0, \-
<span class=
"emphasis"><em>r
</em></span>,
0) it is (
0.5,
0).
44 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"seealso"></a><h2>See Also
</h2><p>
45 <a class=
"citerefentry" href=
"gluCylinder.xml"><span class=
"citerefentry"><span class=
"refentrytitle">gluCylinder
</span></span></a>,
46 <a class=
"citerefentry" href=
"gluNewQuadric.xml"><span class=
"citerefentry"><span class=
"refentrytitle">gluNewQuadric
</span></span></a>,
47 <a class=
"citerefentry" href=
"gluPartialDisk.xml"><span class=
"citerefentry"><span class=
"refentrytitle">gluPartialDisk
</span></span></a>,
48 <a class=
"citerefentry" href=
"gluQuadricOrientation.xml"><span class=
"citerefentry"><span class=
"refentrytitle">gluQuadricOrientation
</span></span></a>,
49 <a class=
"citerefentry" href=
"gluQuadricTexture.xml"><span class=
"citerefentry"><span class=
"refentrytitle">gluQuadricTexture
</span></span></a>,
50 <a class=
"citerefentry" href=
"gluSphere.xml"><span class=
"citerefentry"><span class=
"refentrytitle">gluSphere
</span></span></a>
51 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"Copyright"></a><h2>Copyright
</h2><p>
52 Copyright
<span class=
"trademark"></span>©
1991-
2006
53 Silicon Graphics, Inc. This document is licensed under the SGI
54 Free Software B License. For details, see
55 <a class=
"ulink" href=
"http://oss.sgi.com/projects/FreeB/" target=
"_top">http://oss.sgi.com/projects/FreeB/
</a>.
56 </p></div></div></body></html>
HCoop / clinton / guile-figl.git / blob