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<!DOCTYPE refentry [ <!ENTITY % mathent SYSTEM "math.ent"> %mathent; ]>
<refentry xmlns="http://docbook.org/ns/docbook" version="5.0" xml:id="glBindVertexBuffers">
<info>
<copyright>
<year>2014</year>
<holder>Khronos Group</holder>
</copyright>
</info>
<refmeta>
<refentrytitle>glBindVertexBuffers</refentrytitle>
<manvolnum>3G</manvolnum>
</refmeta>
<refnamediv>
<refname>glBindVertexBuffers</refname>
<refname>glVertexArrayVertexBuffers</refname>
<refpurpose>attach multiple buffer objects to a vertex array object</refpurpose>
</refnamediv>
<refsynopsisdiv><title>C Specification</title>
<funcsynopsis>
<funcprototype>
<funcdef>void <function>glBindVertexBuffers</function></funcdef>
<paramdef>GLuint <parameter>first</parameter></paramdef>
<paramdef>GLsizei <parameter>count</parameter></paramdef>
<paramdef>const GLuint *<parameter>buffers</parameter></paramdef>
<paramdef>const GLuintptr *<parameter>offsets</parameter></paramdef>
<paramdef>const GLsizei *<parameter>strides</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glVertexArrayVertexBuffers</function></funcdef>
<paramdef>GLuint <parameter>vaobj</parameter></paramdef>
<paramdef>GLuint <parameter>first</parameter></paramdef>
<paramdef>GLsizei <parameter>count</parameter></paramdef>
<paramdef>const GLuint *<parameter>buffers</parameter></paramdef>
<paramdef>const GLintptr *<parameter>offsets</parameter></paramdef>
<paramdef>const GLsizei *<parameter>strides</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 xml:id="parameters"><title>Parameters</title>
<variablelist>
<varlistentry>
<term><parameter>vaobj</parameter></term>
<listitem>
<para>
Specifies the name of the vertex array object for
<function>glVertexArrayVertexBuffers</function>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>first</parameter></term>
<listitem>
<para>
Specifies the first vertex buffer binding point to which
a buffer object is to be bound.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>count</parameter></term>
<listitem>
<para>
Specifies the number of buffers to bind.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>buffers</parameter></term>
<listitem>
<para>
Specifies the address of an array of names of existing
buffer objects.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>offsets</parameter></term>
<listitem>
<para>
Specifies the address of an array of offsets to
associate with the binding points.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>buffers</parameter></term>
<listitem>
<para>
Specifies the address of an array of strides to
associate with the binding points.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 xml:id="description"><title>Description</title>
<para>
<function>glBindVertexBuffers</function> and
<function>glVertexArrayVertexBuffers</function> bind storage
from an array of existing buffer objects to a specified number
of consecutive vertex buffer binding points units in a vertex
array object. For <function>glBindVertexBuffers</function>, the
vertex array object is the currently bound vertex array object.
For <function>glVertexArrayVertexBuffers</function>,
<parameter>vaobj</parameter> is the name of the vertex array
object.
</para>
<para>
<parameter>count</parameter> existing buffer objects are bound
to vertex buffer binding points numbered $first$ through $first
+ count - 1$. If <parameter>buffers</parameter> is not NULL, it
specifies an array of <parameter>count</parameter> values, each
of which must be zero or the name of an existing buffer object.
<parameter>offsets</parameter> and
<parameter>strides</parameter> specify arrays of
<parameter>count</parameter> values indicating the offset of the
first element and stride between elements in each buffer,
respectively. If <parameter>buffers</parameter> is NULL, each
affected vertex buffer binding point from $first$ through $first
+ count - 1$ will be reset to have no bound buffer object. In
this case, the offsets and strides associated with the binding
points are set to default values, ignoring
<parameter>offsets</parameter> and
<parameter>strides</parameter>.
</para>
<para>
<function>glBindVertexBuffers</function> is equivalent (assuming no errors
are generated) to:
<programlisting> for (i = 0; i < count; i++) {
if (buffers == NULL) {
glBindVertexBuffer(first + i, 0, 0, 16);
} else {
glBindVertexBuffer(first + i, buffers[i], offsets[i], strides[i]);
}
}</programlisting>
except that buffers will not be created if they do not exist.
</para>
<para>
<function>glVertexArrayVertexBuffers</function> is equivalent to
the pseudocode above, but replacing
<function>glBindVertexBuffers</function>(args) with
<function>glVertexArrayVertexBuffers</function>(vaobj, args).
</para>
<para>
The values specified in <parameter>buffers</parameter>,
<parameter>offsets</parameter>, and
<parameter>strides</parameter> will be checked separately for
each vertex buffer binding point. When a value for a specific
vertex buffer binding point is invalid, the state for that
binding point will be unchanged and an error will be generated.
However, state for other vertex buffer binding points will still
be changed if their corresponding values are valid.
</para>
</refsect1>
<refsect1 xml:id="errors"><title>Errors</title>
<para>
<constant>GL_INVALID_OPERATION</constant> is generated
by <function>glBindVertexBuffers</function> if no vertex array
object is bound.
</para>
<para>
<constant>GL_INVALID_OPERATION</constant> is generated by
<function>glVertexArrayVertexBuffers</function> if
<parameter>vaobj</parameter> is not the name of the vertex array
object.
</para>
<para>
<constant>GL_INVALID_OPERATION</constant> is generated if $first
+ count$ is greater than the value of
<constant>GL_MAX_VERTEX_ATTRIB_BINDINGS</constant>.
</para>
<para>
<constant>GL_INVALID_OPERATION</constant> is generated if any
value in <constant>buffers</constant> is not zero or the name of
an existing buffer object.
</para>
<para>
<constant>GL_INVALID_VALUE</constant> is generated if any value
in <parameter>offsets</parameter> or
<parameter>strides</parameter> is negative, or if a value is
<parameter>stride</parameter> is greater than the value of
<constant>GL_MAX_VERTEX_ATTRIB_STRIDE</constant>.
</para>
</refsect1>
<refsect1 xml:id="versions"><title>Version Support</title>
<informaltable>
<tgroup cols="13" align="left">
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apifunchead.xml" xpointer="xpointer(/*/*)"/>
<tbody>
<row>
<entry><function>glBindVertexBuffers</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='44']/*)"/>
</row>
<row>
<entry><function>glVertexArrayVertexBuffers</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='45']/*)"/>
</row>
</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 xml:id="seealso"><title>See Also</title>
<para>
<citerefentry><refentrytitle>glGenBuffers</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glBindBuffer</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glDeleteBuffers</refentrytitle></citerefentry>
<citerefentry><refentrytitle>glDeleteTextures</refentrytitle></citerefentry>
</para>
</refsect1>
<refsect1 xml:id="Copyright"><title>Copyright</title>
<para>
Copyright <trademark class="copyright"/> 2014 Khronos Group.
This material may be distributed subject to the terms and conditions set forth in
the Open Publication License, v 1.0, 8 June 1999.
<link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="http://opencontent.org/openpub/">http://opencontent.org/openpub/</link>.
</para>
</refsect1>
</refentry>
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