
<refentry id="glVertex">
    <refmeta>
        <refmetainfo>
            <copyright>
                <year>1991-2006</year>
                <holder>Silicon Graphics, Inc.</holder>
            </copyright>
        </refmetainfo>
        <refentrytitle>glVertex</refentrytitle>
        <manvolnum>3G</manvolnum>
    </refmeta>
    <refnamediv>
        <refname>glVertex</refname>
        <refpurpose>specify a vertex</refpurpose>
    </refnamediv>
    <refsynopsisdiv><title>C Specification</title>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glVertex2s</function></funcdef>
                <paramdef>GLshort <parameter>x</parameter></paramdef>
                <paramdef>GLshort <parameter>y</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glVertex2i</function></funcdef>
                <paramdef>GLint <parameter>x</parameter></paramdef>
                <paramdef>GLint <parameter>y</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glVertex2f</function></funcdef>
                <paramdef>GLfloat <parameter>x</parameter></paramdef>
                <paramdef>GLfloat <parameter>y</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glVertex2d</function></funcdef>
                <paramdef>GLdouble <parameter>x</parameter></paramdef>
                <paramdef>GLdouble <parameter>y</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glVertex3s</function></funcdef>
                <paramdef>GLshort <parameter>x</parameter></paramdef>
                <paramdef>GLshort <parameter>y</parameter></paramdef>
                <paramdef>GLshort <parameter>z</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glVertex3i</function></funcdef>
                <paramdef>GLint <parameter>x</parameter></paramdef>
                <paramdef>GLint <parameter>y</parameter></paramdef>
                <paramdef>GLint <parameter>z</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glVertex3f</function></funcdef>
                <paramdef>GLfloat <parameter>x</parameter></paramdef>
                <paramdef>GLfloat <parameter>y</parameter></paramdef>
                <paramdef>GLfloat <parameter>z</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glVertex3d</function></funcdef>
                <paramdef>GLdouble <parameter>x</parameter></paramdef>
                <paramdef>GLdouble <parameter>y</parameter></paramdef>
                <paramdef>GLdouble <parameter>z</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glVertex4s</function></funcdef>
                <paramdef>GLshort <parameter>x</parameter></paramdef>
                <paramdef>GLshort <parameter>y</parameter></paramdef>
                <paramdef>GLshort <parameter>z</parameter></paramdef>
                <paramdef>GLshort <parameter>w</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glVertex4i</function></funcdef>
                <paramdef>GLint <parameter>x</parameter></paramdef>
                <paramdef>GLint <parameter>y</parameter></paramdef>
                <paramdef>GLint <parameter>z</parameter></paramdef>
                <paramdef>GLint <parameter>w</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glVertex4f</function></funcdef>
                <paramdef>GLfloat <parameter>x</parameter></paramdef>
                <paramdef>GLfloat <parameter>y</parameter></paramdef>
                <paramdef>GLfloat <parameter>z</parameter></paramdef>
                <paramdef>GLfloat <parameter>w</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glVertex4d</function></funcdef>
                <paramdef>GLdouble <parameter>x</parameter></paramdef>
                <paramdef>GLdouble <parameter>y</parameter></paramdef>
                <paramdef>GLdouble <parameter>z</parameter></paramdef>
                <paramdef>GLdouble <parameter>w</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
    </refsynopsisdiv>
    <refsect1 id="parameters"><title>Parameters</title>
        <variablelist>
        <varlistentry>
            <term><parameter>x</parameter></term>
            <term><parameter>y</parameter></term>
            <term><parameter>z</parameter></term>
            <term><parameter>w</parameter></term>
            <listitem>
                <para>
                    Specify <emphasis>x</emphasis>, <emphasis>y</emphasis>, <emphasis>z</emphasis>, and <emphasis>w</emphasis> coordinates of a vertex.
                    Not all parameters are present in all forms of the command.
                </para>
            </listitem>
        </varlistentry>
        </variablelist>
    </refsect1>
    <refsynopsisdiv><title>C Specification</title>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glVertex2sv</function></funcdef>
                <paramdef>const GLshort * <parameter>v</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glVertex2iv</function></funcdef>
                <paramdef>const GLint * <parameter>v</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glVertex2fv</function></funcdef>
                <paramdef>const GLfloat * <parameter>v</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glVertex2dv</function></funcdef>
                <paramdef>const GLdouble * <parameter>v</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glVertex3sv</function></funcdef>
                <paramdef>const GLshort * <parameter>v</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glVertex3iv</function></funcdef>
                <paramdef>const GLint * <parameter>v</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glVertex3fv</function></funcdef>
                <paramdef>const GLfloat * <parameter>v</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glVertex3dv</function></funcdef>
                <paramdef>const GLdouble * <parameter>v</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glVertex4sv</function></funcdef>
                <paramdef>const GLshort * <parameter>v</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glVertex4iv</function></funcdef>
                <paramdef>const GLint * <parameter>v</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glVertex4fv</function></funcdef>
                <paramdef>const GLfloat * <parameter>v</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glVertex4dv</function></funcdef>
                <paramdef>const GLdouble * <parameter>v</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
    </refsynopsisdiv>
    <refsect1 id="parameters2"><title>Parameters</title>
        <variablelist>
        <varlistentry>
            <term><parameter>v</parameter></term>
            <listitem>
                <para>
                    Specifies a pointer to an array of two, three, or four elements.
                    The elements of a two-element array are 
                    <inlineequation><mml:math><mml:mi mathvariant="italic">x</mml:mi></mml:math></inlineequation>
                    and 
                    <inlineequation><mml:math><mml:mi mathvariant="italic">y</mml:mi></mml:math></inlineequation>;
                    of a three-element array, 
                    <inlineequation><mml:math><mml:mi mathvariant="italic">x</mml:mi></mml:math></inlineequation>,
                    <inlineequation><mml:math><mml:mi mathvariant="italic">y</mml:mi></mml:math></inlineequation>,
                    and 
                    <inlineequation><mml:math><mml:mi mathvariant="italic">z</mml:mi></mml:math></inlineequation>;
                    and of a four-element array, 
                    <inlineequation><mml:math><mml:mi mathvariant="italic">x</mml:mi></mml:math></inlineequation>,
                    <inlineequation><mml:math><mml:mi mathvariant="italic">y</mml:mi></mml:math></inlineequation>,
                    <inlineequation><mml:math><mml:mi mathvariant="italic">z</mml:mi></mml:math></inlineequation>,
                    and 
                    <inlineequation><mml:math><mml:mi mathvariant="italic">w</mml:mi></mml:math></inlineequation>.
                </para>
            </listitem>
        </varlistentry>
        </variablelist>
    </refsect1>
    <refsect1 id="description"><title>Description</title>
        <para>
            <function>glVertex</function> commands are used within <citerefentry><refentrytitle>glBegin</refentrytitle></citerefentry>/<citerefentry><refentrytitle>glEnd</refentrytitle></citerefentry> pairs to specify
            point, line, and polygon vertices.  The current color, normal, texture
            coordinates, and fog coordinate are associated with the vertex when <function>glVertex</function>
            is called.
        </para>
        <para>
            When only 
            <inlineequation><mml:math><mml:mi mathvariant="italic">x</mml:mi></mml:math></inlineequation>
            and 
            <inlineequation><mml:math><mml:mi mathvariant="italic">y</mml:mi></mml:math></inlineequation>
            are specified, 
            <inlineequation><mml:math><mml:mi mathvariant="italic">z</mml:mi></mml:math></inlineequation>
            defaults to 0 and
            <inlineequation><mml:math><mml:mi mathvariant="italic">w</mml:mi></mml:math></inlineequation>
            defaults to 1.  When 
            <inlineequation><mml:math><mml:mi mathvariant="italic">x</mml:mi></mml:math></inlineequation>,
            <inlineequation><mml:math><mml:mi mathvariant="italic">y</mml:mi></mml:math></inlineequation>,
            and 
            <inlineequation><mml:math><mml:mi mathvariant="italic">z</mml:mi></mml:math></inlineequation>
            are specified, 
            <inlineequation><mml:math><mml:mi mathvariant="italic">w</mml:mi></mml:math></inlineequation>
            defaults to 1.
        </para>
    </refsect1>
    <refsect1 id="notes"><title>Notes</title>
        <para>
            Invoking <function>glVertex</function> outside of a <citerefentry><refentrytitle>glBegin</refentrytitle></citerefentry>/<citerefentry><refentrytitle>glEnd</refentrytitle></citerefentry> pair
            results in undefined behavior.
        </para>
    </refsect1>
    <refsect1 id="seealso"><title>See Also</title>
        <para>
            <citerefentry><refentrytitle>glBegin</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glCallList</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glColor</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glEdgeFlag</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glEvalCoord</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glFogCoord</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glIndex</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glMaterial</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glMultiTexCoord</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glNormal</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glRect</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glTexCoord</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glVertexPointer</refentrytitle></citerefentry>
        </para>
    </refsect1>
    <refsect1 id="Copyright"><title>Copyright</title>
        <para>
            Copyright <trademark class="copyright"></trademark> 1991-2006
            Silicon Graphics, Inc. This document is licensed under the SGI
            Free Software B License. For details, see
            <ulink url="http://oss.sgi.com/projects/FreeB/">http://oss.sgi.com/projects/FreeB/</ulink>.
        </para>
    </refsect1>
</refentry>
