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1 | <?xml version="1.0" encoding="UTF-8"?> |
2 | <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "xhtml1-transitional.dtd"> | |
3 | <!-- saved from url=(0013)about:internet --> | |
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>glDrawArrays - OpenGL 4 Reference Pages</title><meta name="generator" content="DocBook XSL Stylesheets V1.69.1" /></head><body><div class="refentry" lang="en" xml:lang="en"><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" summary="Function synopsis" cellspacing="0" cellpadding="0"><tr><td><code class="funcdef">void <b class="fsfunc">glDrawArrays</b>(</code></td><td>GLenum </td><td><var class="pdparam">mode</var>, </td></tr><tr><td> </td><td>GLint </td><td><var class="pdparam">first</var>, </td></tr><tr><td> </td><td>GLsizei </td><td><var class="pdparam">count</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>mode</code></em></span></dt><dd><p> | |
5 | Specifies what kind of primitives to render. | |
6 | Symbolic constants | |
7 | <code class="constant">GL_POINTS</code>, | |
8 | <code class="constant">GL_LINE_STRIP</code>, | |
9 | <code class="constant">GL_LINE_LOOP</code>, | |
10 | <code class="constant">GL_LINES</code>, | |
11 | <code class="constant">GL_LINE_STRIP_ADJACENCY</code>, | |
12 | <code class="constant">GL_LINES_ADJACENCY</code>, | |
13 | <code class="constant">GL_TRIANGLE_STRIP</code>, | |
14 | <code class="constant">GL_TRIANGLE_FAN</code>, | |
15 | <code class="constant">GL_TRIANGLES</code>, | |
16 | <code class="constant">GL_TRIANGLE_STRIP_ADJACENCY</code>, | |
17 | <code class="constant">GL_TRIANGLES_ADJACENCY</code> and <code class="constant">GL_PATCHES</code> | |
18 | are accepted. | |
19 | </p></dd><dt><span class="term"><em class="parameter"><code>first</code></em></span></dt><dd><p> | |
20 | Specifies the starting index in the enabled arrays. | |
21 | </p></dd><dt><span class="term"><em class="parameter"><code>count</code></em></span></dt><dd><p> | |
22 | Specifies the number of indices to be rendered. | |
23 | </p></dd></dl></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="description"></a><h2>Description</h2><p> | |
24 | <code class="function">glDrawArrays</code> specifies multiple geometric primitives | |
25 | with very few subroutine calls. Instead of calling a GL procedure | |
26 | to pass each individual vertex, normal, texture coordinate, edge | |
27 | flag, or color, you can prespecify | |
28 | separate arrays of vertices, normals, and colors and use them to | |
29 | construct a sequence of primitives with a single | |
30 | call to <code class="function">glDrawArrays</code>. | |
31 | </p><p> | |
32 | When <code class="function">glDrawArrays</code> is called, it uses <em class="parameter"><code>count</code></em> sequential elements from each | |
33 | enabled array to construct a sequence of geometric primitives, | |
34 | beginning with element <em class="parameter"><code>first</code></em>. <em class="parameter"><code>mode</code></em> specifies what kind of | |
35 | primitives are constructed and how the array elements | |
36 | construct those primitives. | |
37 | </p><p> | |
38 | Vertex attributes that are modified by <code class="function">glDrawArrays</code> have an | |
39 | unspecified value after <code class="function">glDrawArrays</code> returns. Attributes that aren't | |
40 | modified remain well defined. | |
41 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="notes"></a><h2>Notes</h2><p> | |
42 | <code class="constant">GL_LINE_STRIP_ADJACENCY</code>, | |
43 | <code class="constant">GL_LINES_ADJACENCY</code>, | |
44 | <code class="constant">GL_TRIANGLE_STRIP_ADJACENCY</code> and | |
45 | <code class="constant">GL_TRIANGLES_ADJACENCY</code> | |
46 | are available only if the GL version is 3.2 or greater. | |
47 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="errors"></a><h2>Errors</h2><p> | |
48 | <code class="constant">GL_INVALID_ENUM</code> is generated if <em class="parameter"><code>mode</code></em> is not an accepted value. | |
49 | </p><p> | |
50 | <code class="constant">GL_INVALID_VALUE</code> is generated if <em class="parameter"><code>count</code></em> is negative. | |
51 | </p><p> | |
52 | <code class="constant">GL_INVALID_OPERATION</code> is generated if a non-zero buffer object name is bound to an | |
53 | enabled array and the buffer object's data store is currently mapped. | |
54 | </p><p> | |
55 | <code class="constant">GL_INVALID_OPERATION</code> is generated if a geometry shader is active and <em class="parameter"><code>mode</code></em> | |
56 | is incompatible with the input primitive type of the geometry shader in the currently installed program object. | |
57 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p> | |
58 | <a href="glDrawArraysInstanced.xml"><span class="citerefentry"><span class="refentrytitle">glDrawArraysInstanced</span></span></a>, | |
59 | <a href="glDrawElements.xml"><span class="citerefentry"><span class="refentrytitle">glDrawElements</span></span></a>, | |
60 | <a href="glDrawRangeElements.xml"><span class="citerefentry"><span class="refentrytitle">glDrawRangeElements</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 href="http://oss.sgi.com/projects/FreeB/" target="_top">http://oss.sgi.com/projects/FreeB/</a>. | |
66 | </p></div></div></body></html> |