HCoop / clinton / guile-figl.git / blame
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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>gluCylinder</title><meta name="generator" content="DocBook XSL Stylesheets V1.73.2" /></head><body><div class="refentry" lang="en" xml:lang="en"><a id="gluCylinder"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>gluCylinder — draw a cylinder</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">gluCylinder</b>(</code></td><td>GLUquadric* </td><td><var class="pdparam">quad</var>, </td></tr><tr><td> </td><td>GLdouble </td><td><var class="pdparam">base</var>, </td></tr><tr><td> </td><td>GLdouble </td><td><var class="pdparam">top</var>, </td></tr><tr><td> </td><td>GLdouble </td><td><var class="pdparam">height</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>base</code></em></span></dt><dd><p> | |
| 6 | Specifies the radius of the cylinder at <span class="emphasis"><em>z</em></span> = 0. | |
| 7 | </p></dd><dt><span class="term"><em class="parameter"><code>top</code></em></span></dt><dd><p> | |
| 8 | Specifies the radius of the cylinder at <span class="emphasis"><em>z</em></span> = <em class="parameter"><code>height</code></em>. | |
| 9 | </p></dd><dt><span class="term"><em class="parameter"><code>height</code></em></span></dt><dd><p> | |
| 10 | Specifies the height of the cylinder. | |
| 11 | </p></dd><dt><span class="term"><em class="parameter"><code>slices</code></em></span></dt><dd><p> | |
| 12 | Specifies the number of subdivisions around the <span class="emphasis"><em>z</em></span> axis. | |
| 13 | </p></dd><dt><span class="term"><em class="parameter"><code>stacks</code></em></span></dt><dd><p> | |
| 14 | Specifies the number of subdivisions along the <span class="emphasis"><em>z</em></span> axis. | |
| 15 | </p></dd></dl></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="description"></a><h2>Description</h2><p> | |
| 16 | <code class="function">gluCylinder</code> draws a cylinder oriented along the <span class="emphasis"><em>z</em></span> axis. The base of the cylinder | |
| 17 | is placed at <span class="emphasis"><em>z</em></span> = 0 and the top at | |
| 18 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
| 19 | ||
| 20 | <mml:mrow> | |
| 21 | <mml:mi mathvariant="italic">z</mml:mi> | |
| 22 | <mml:mo>=</mml:mo> | |
| 23 | <mml:mi mathvariant="italic">height</mml:mi> | |
| 24 | </mml:mrow> | |
| 25 | </mml:math>. | |
| 26 | Like a sphere, | |
| 27 | a cylinder is subdivided around the <span class="emphasis"><em>z</em></span> axis into slices and along the | |
| 28 | <span class="emphasis"><em>z</em></span> axis into stacks. | |
| 29 | </p><p> | |
| 30 | Note that if <em class="parameter"><code>top</code></em> is set to 0.0, this routine generates a cone. | |
| 31 | </p><p> | |
| 32 | If the orientation is set to <code class="constant">GLU_OUTSIDE</code> | |
| 33 | (with <a class="citerefentry" href="gluQuadricOrientation.xml"><span class="citerefentry"><span class="refentrytitle">gluQuadricOrientation</span></span></a>), then any generated normals | |
| 34 | point away from the <span class="emphasis"><em>z</em></span> axis. Otherwise, they point toward the | |
| 35 | <span class="emphasis"><em>z</em></span> axis. | |
| 36 | </p><p> | |
| 37 | If texturing is turned on (with <a class="citerefentry" href="gluQuadricTexture.xml"><span class="citerefentry"><span class="refentrytitle">gluQuadricTexture</span></span></a>), then texture | |
| 38 | coordinates are generated so that <span class="emphasis"><em>t</em></span> ranges linearly from 0.0 | |
| 39 | at <span class="emphasis"><em>z</em></span> = 0 to 1.0 at <span class="emphasis"><em>z</em></span> = <em class="parameter"><code>height</code></em>, and <span class="emphasis"><em>s</em></span> | |
| 40 | ranges from 0.0 at the +<span class="emphasis"><em>y</em></span> axis, to 0.25 at the +<span class="emphasis"><em>x</em></span> axis, | |
| 41 | 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, | |
| 42 | and back to 1.0 at the +<span class="emphasis"><em>y</em></span> axis. | |
| 43 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p> | |
| 44 | <a class="citerefentry" href="gluDisk.xml"><span class="citerefentry"><span class="refentrytitle">gluDisk</span></span></a>, | |
| 45 | <a class="citerefentry" href="gluNewQuadric.xml"><span class="citerefentry"><span class="refentrytitle">gluNewQuadric</span></span></a>, | |
| 46 | <a class="citerefentry" href="gluPartialDisk.xml"><span class="citerefentry"><span class="refentrytitle">gluPartialDisk</span></span></a>, | |
| 47 | <a class="citerefentry" href="gluQuadricTexture.xml"><span class="citerefentry"><span class="refentrytitle">gluQuadricTexture</span></span></a>, | |
| 48 | <a class="citerefentry" href="gluSphere.xml"><span class="citerefentry"><span class="refentrytitle">gluSphere</span></span></a> | |
| 49 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="Copyright"></a><h2>Copyright</h2><p> | |
| 50 | Copyright <span class="trademark"></span>© 1991-2006 | |
| 51 | Silicon Graphics, Inc. This document is licensed under the SGI | |
| 52 | Free Software B License. For details, see | |
| 53 | <a class="ulink" href="http://oss.sgi.com/projects/FreeB/" target="_top">http://oss.sgi.com/projects/FreeB/</a>. | |
| 54 | </p></div></div></body></html> |