upstream-doc/man3/xhtml/glPointParameter.xml

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   4 <?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" /><link rel="stylesheet" type="text/css" href="opengl-man.css" /><title>glPointParameter</title><meta name="generator" content="DocBook XSL Stylesheets V1.69.1" /></head><body><div class="refentry" lang="en" xml:lang="en"><a id="glPointParameter"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glPointParameter — specify point parameters</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">glPointParameterf</b>(</code></td><td>GLenum  </td><td><var class="pdparam">pname</var>, </td></tr><tr><td> </td><td>GLfloat  </td><td><var class="pdparam">param</var><code>)</code>;</td></tr></table></div><p></p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"><tr><td><code class="funcdef">void <b class="fsfunc">glPointParameteri</b>(</code></td><td>GLenum  </td><td><var class="pdparam">pname</var>, </td></tr><tr><td> </td><td>GLint  </td><td><var class="pdparam">param</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>pname</code></em></span></dt><dd><p>
   5                     Specifies a single-valued point parameter.
   6                     <code class="constant">GL_POINT_FADE_THRESHOLD_SIZE</code>, and
   7                     <code class="constant">GL_POINT_SPRITE_COORD_ORIGIN</code>
   8                     are accepted.
   9                 </p></dd><dt><span class="term"><em class="parameter"><code>param</code></em></span></dt><dd><p>
  10                     Specifies the value that <em class="parameter"><code>pname</code></em> will be set to.
  11                 </p></dd></dl></div></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">glPointParameterfv</b>(</code></td><td>GLenum  </td><td><var class="pdparam">pname</var>, </td></tr><tr><td> </td><td>const GLfloat *  </td><td><var class="pdparam">params</var><code>)</code>;</td></tr></table></div><p></p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"><tr><td><code class="funcdef">void <b class="fsfunc">glPointParameteriv</b>(</code></td><td>GLenum  </td><td><var class="pdparam">pname</var>, </td></tr><tr><td> </td><td>const GLint *  </td><td><var class="pdparam">params</var><code>)</code>;</td></tr></table></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="parameters2"></a><h2>Parameters</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>pname</code></em></span></dt><dd><p>
  12                     Specifies a point parameter.
  13                     <code class="constant">GL_POINT_FADE_THRESHOLD_SIZE</code>, and
  14                     <code class="constant">GL_POINT_SPRITE_COORD_ORIGIN</code>
  15                     are accepted.
  16                 </p></dd><dt><span class="term"><em class="parameter"><code>params</code></em></span></dt><dd><p>
  17                     Specifies the value to be assigned to <em class="parameter"><code>pname</code></em>..
  18                 </p></dd></dl></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="description"></a><h2>Description</h2><p>
  19             The following values are accepted for <em class="parameter"><code>pname</code></em>:
  20         </p><div class="variablelist"><dl><dt><span class="term"><code class="constant">GL_POINT_FADE_THRESHOLD_SIZE</code></span></dt><dd><p>
  21                     </p><p>
  22                         <em class="parameter"><code>params</code></em> is a single floating-point value that specifies the threshold value
  23                         to which point sizes are clamped if they exceed the specified value.  The
  24                         default value is 1.0.
  25                     </p></dd><dt><span class="term"><code class="constant">GL_POINT_SPRITE_COORD_ORIGIN</code></span></dt><dd><p>
  26                     </p><p>
  27                         <em class="parameter"><code>params</code></em> is a single enum specifying the point sprite texture coordinate origin, either <code class="constant">GL_LOWER_LEFT</code> or <code class="constant">GL_UPPER_LEFT</code>.
  28                         The default value is <code class="constant">GL_UPPER_LEFT</code>.
  29                     </p></dd></dl></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="errors"></a><h2>Errors</h2><p>
  30             <code class="constant">GL_INVALID_VALUE</code> is generated if the value specified for
  31             <code class="constant">GL_POINT_FADE_THRESHOLD_SIZE</code> is less than zero.
  32         </p><p>
  33             <code class="constant">GL_INVALID_ENUM</code> is generated If the value specified for
  34             <code class="constant">GL_POINT_SPRITE_COORD_ORIGIN</code> is not <code class="constant">GL_LOWER_LEFT</code> or <code class="constant">GL_UPPER_LEFT</code>.
  35         </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="associatedgets"></a><h2>Associated Gets</h2><p>
  36             <a href="glGet.xml"><span class="citerefentry"><span class="refentrytitle">glGet</span></span></a> with argument <code class="constant">GL_POINT_FADE_THRESHOLD_SIZE</code>
  37         </p><p>
  38             <a href="glGet.xml"><span class="citerefentry"><span class="refentrytitle">glGet</span></span></a> with argument <code class="constant">GL_POINT_SPRITE_COORD_ORIGIN</code>
  39         </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p>
  40             <a href="glPointSize.xml"><span class="citerefentry"><span class="refentrytitle">glPointSize</span></span></a>
  41         </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="Copyright"></a><h2>Copyright</h2><p>
  42             Copyright <span class="trademark"></span>© 1991-2006
  43             Silicon Graphics, Inc. Copyright <span class="trademark"></span>© 2010
  44             Khronos Group. This document is licensed under the SGI
  45             Free Software B License. For details, see
  46             <a href="http://oss.sgi.com/projects/FreeB/" target="_top">http://oss.sgi.com/projects/FreeB/</a>.
  47         </p></div></div></body></html>