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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "xhtml1-transitional.dtd">
<?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>glDrawArrays - OpenGL 4 Reference Pages</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1" /></head><body><div class="refentry"><a id="glDrawArrays"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glDrawArrays — render primitives from array data</p></div><div class="refsynopsisdiv"><h2>C Specification</h2><div class="funcsynopsis"><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">void <strong class="fsfunc">glDrawArrays</strong>(</code></td><td>GLenum <var class="pdparam">mode</var>, </td></tr><tr><td> </td><td>GLint <var class="pdparam">first</var>, </td></tr><tr><td> </td><td>GLsizei <var class="pdparam">count</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1"><a id="parameters"></a><h2>Parameters</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>mode</code></em></span></dt><dd><p>
Specifies what kind of primitives to render.
Symbolic constants
<code class="constant">GL_POINTS</code>,
<code class="constant">GL_LINE_STRIP</code>,
<code class="constant">GL_LINE_LOOP</code>,
<code class="constant">GL_LINES</code>,
<code class="constant">GL_LINE_STRIP_ADJACENCY</code>,
<code class="constant">GL_LINES_ADJACENCY</code>,
<code class="constant">GL_TRIANGLE_STRIP</code>,
<code class="constant">GL_TRIANGLE_FAN</code>,
<code class="constant">GL_TRIANGLES</code>,
<code class="constant">GL_TRIANGLE_STRIP_ADJACENCY</code>,
<code class="constant">GL_TRIANGLES_ADJACENCY</code> and <code class="constant">GL_PATCHES</code>
are accepted.
</p></dd><dt><span class="term"><em class="parameter"><code>first</code></em></span></dt><dd><p>
Specifies the starting index in the enabled arrays.
</p></dd><dt><span class="term"><em class="parameter"><code>count</code></em></span></dt><dd><p>
Specifies the number of indices to be rendered.
</p></dd></dl></div></div><div class="refsect1"><a id="description"></a><h2>Description</h2><p>
<code class="function">glDrawArrays</code> specifies multiple geometric primitives
with very few subroutine calls. Instead of calling a GL procedure
to pass each individual vertex, normal, texture coordinate, edge
flag, or color, you can prespecify
separate arrays of vertices, normals, and colors and use them to
construct a sequence of primitives with a single
call to <code class="function">glDrawArrays</code>.
</p><p>
When <code class="function">glDrawArrays</code> is called, it uses <em class="parameter"><code>count</code></em> sequential elements from each
enabled array to construct a sequence of geometric primitives,
beginning with element <em class="parameter"><code>first</code></em>. <em class="parameter"><code>mode</code></em> specifies what kind of
primitives are constructed and how the array elements
construct those primitives.
</p><p>
Vertex attributes that are modified by <code class="function">glDrawArrays</code> have an
unspecified value after <code class="function">glDrawArrays</code> returns. Attributes that aren't
modified remain well defined.
</p></div><div class="refsect1"><a id="notes"></a><h2>Notes</h2><p>
<code class="constant">GL_LINE_STRIP_ADJACENCY</code>,
<code class="constant">GL_LINES_ADJACENCY</code>,
<code class="constant">GL_TRIANGLE_STRIP_ADJACENCY</code> and
<code class="constant">GL_TRIANGLES_ADJACENCY</code>
are available only if the GL version is 3.2 or greater.
</p></div><div class="refsect1"><a id="errors"></a><h2>Errors</h2><p>
<code class="constant">GL_INVALID_ENUM</code> is generated if <em class="parameter"><code>mode</code></em> is not an accepted value.
</p><p>
<code class="constant">GL_INVALID_VALUE</code> is generated if <em class="parameter"><code>count</code></em> is negative.
</p><p>
<code class="constant">GL_INVALID_OPERATION</code> is generated if a non-zero buffer object name is bound to an
enabled array and the buffer object's data store is currently mapped.
</p><p>
<code class="constant">GL_INVALID_OPERATION</code> is generated if a geometry shader is active and <em class="parameter"><code>mode</code></em>
is incompatible with the input primitive type of the geometry shader in the currently installed program object.
</p></div><div class="refsect1"><a id="seealso"></a><h2>See Also</h2><p>
<a class="citerefentry" href="glDrawArraysInstanced.xml"><span class="citerefentry"><span class="refentrytitle">glDrawArraysInstanced</span></span></a>,
<a class="citerefentry" href="glDrawElements.xml"><span class="citerefentry"><span class="refentrytitle">glDrawElements</span></span></a>,
<a class="citerefentry" href="glDrawRangeElements.xml"><span class="citerefentry"><span class="refentrytitle">glDrawRangeElements</span></span></a>,
</p></div><div class="refsect1"><a id="Copyright"></a><h2>Copyright</h2><p>
Copyright <span class="trademark"></span>© 1991-2006 Silicon Graphics, Inc.
Copyright <span class="trademark"></span>© 2010-2013 Khronos Group.
This document is licensed under the SGI Free Software B License.
For details, see
<a class="ulink" href="http://oss.sgi.com/projects/FreeB/" target="_top">http://oss.sgi.com/projects/FreeB/</a>.
</p></div></div></body></html>
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