mirror of
https://github.com/Ryujinx/Opentk.git
synced 2024-12-25 17:55:31 +00:00
189 lines
11 KiB
XML
189 lines
11 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
|
|
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook MathML Module V1.1b1//EN"
|
|
"http://www.oasis-open.org/docbook/xml/mathml/1.1CR1/dbmathml.dtd">
|
|
<refentry id="glNormalPointer">
|
|
<refmeta>
|
|
<refmetainfo>
|
|
<copyright>
|
|
<year>1991-2006</year>
|
|
<holder>Silicon Graphics, Inc.</holder>
|
|
</copyright>
|
|
</refmetainfo>
|
|
<refentrytitle>glNormalPointer</refentrytitle>
|
|
<manvolnum>3G</manvolnum>
|
|
</refmeta>
|
|
<refnamediv>
|
|
<refname>glNormalPointer</refname>
|
|
<refpurpose>define an array of normals</refpurpose>
|
|
</refnamediv>
|
|
<refsynopsisdiv><title>C Specification</title>
|
|
<funcsynopsis>
|
|
<funcprototype>
|
|
<funcdef>void <function>glNormalPointer</function></funcdef>
|
|
<paramdef>GLenum <parameter>type</parameter></paramdef>
|
|
<paramdef>GLsizei <parameter>stride</parameter></paramdef>
|
|
<paramdef>const GLvoid * <parameter>pointer</parameter></paramdef>
|
|
</funcprototype>
|
|
</funcsynopsis>
|
|
</refsynopsisdiv>
|
|
<!-- eqn: ignoring delim $$ -->
|
|
<refsect1 id="parameters"><title>Parameters</title>
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><parameter>type</parameter></term>
|
|
<listitem>
|
|
<para>
|
|
Specifies the data type of each coordinate in the array.
|
|
Symbolic constants
|
|
<constant>GL_BYTE</constant>,
|
|
<constant>GL_SHORT</constant>,
|
|
<constant>GL_INT</constant>,
|
|
<constant>GL_FLOAT</constant>, and
|
|
<constant>GL_DOUBLE</constant>
|
|
are accepted. The initial value is <constant>GL_FLOAT</constant>.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><parameter>stride</parameter></term>
|
|
<listitem>
|
|
<para>
|
|
Specifies the byte offset between consecutive normals. If <parameter>stride</parameter> is
|
|
0, the normals are understood to be tightly packed in
|
|
the array. The initial value is 0.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><parameter>pointer</parameter></term>
|
|
<listitem>
|
|
<para>
|
|
Specifies a pointer to the first coordinate of the first normal in the
|
|
array. The initial value is 0.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</refsect1>
|
|
<refsect1 id="description"><title>Description</title>
|
|
<para>
|
|
<function>glNormalPointer</function> specifies the location and data format of an array of normals
|
|
to use when rendering.
|
|
<parameter>type</parameter> specifies the data type of each normal coordinate,
|
|
and <parameter>stride</parameter> specifies the byte stride from one
|
|
normal to the next, allowing vertices and attributes
|
|
to be packed into a single array or stored in separate arrays.
|
|
(Single-array storage may be more efficient on some implementations;
|
|
see <citerefentry><refentrytitle>glInterleavedArrays</refentrytitle></citerefentry>.)
|
|
</para>
|
|
<para>
|
|
If a non-zero named buffer object is bound to the <constant>GL_ARRAY_BUFFER</constant> target
|
|
(see <citerefentry><refentrytitle>glBindBuffer</refentrytitle></citerefentry>) while a normal array is
|
|
specified, <parameter>pointer</parameter> is treated as a byte offset into the buffer object's data store.
|
|
Also, the buffer object binding (<constant>GL_ARRAY_BUFFER_BINDING</constant>) is saved as normal vertex array
|
|
client-side state (<constant>GL_NORMAL_ARRAY_BUFFER_BINDING</constant>).
|
|
</para>
|
|
<para>
|
|
When a normal array is specified,
|
|
<parameter>type</parameter>, <parameter>stride</parameter>, and <parameter>pointer</parameter> are saved as client-side
|
|
state, in addition to the current vertex array buffer object binding.
|
|
</para>
|
|
<para>
|
|
To enable and disable the normal array, call
|
|
<citerefentry><refentrytitle>glEnableClientState</refentrytitle></citerefentry> and <citerefentry><refentrytitle>glDisableClientState</refentrytitle></citerefentry> with the argument
|
|
<constant>GL_NORMAL_ARRAY</constant>. If
|
|
enabled, the normal array is used
|
|
when <citerefentry><refentrytitle>glDrawArrays</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glMultiDrawArrays</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glDrawElements</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glMultiDrawElements</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glDrawRangeElements</refentrytitle></citerefentry>, or
|
|
<citerefentry><refentrytitle>glArrayElement</refentrytitle></citerefentry> is called.
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 id="notes"><title>Notes</title>
|
|
<para>
|
|
<function>glNormalPointer</function> is available only if the GL version is 1.1 or greater.
|
|
</para>
|
|
<para>
|
|
The normal array is initially disabled and isn't accessed when
|
|
<citerefentry><refentrytitle>glArrayElement</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glDrawElements</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glDrawRangeElements</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glDrawArrays</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glMultiDrawArrays</refentrytitle></citerefentry>, or <citerefentry><refentrytitle>glMultiDrawElements</refentrytitle></citerefentry>
|
|
is called.
|
|
</para>
|
|
<para>
|
|
Execution of <function>glNormalPointer</function> is not allowed between
|
|
<citerefentry><refentrytitle>glBegin</refentrytitle></citerefentry> and the corresponding <citerefentry><refentrytitle>glEnd</refentrytitle></citerefentry>,
|
|
but an error may or may not be generated. If an error is not generated,
|
|
the operation is undefined.
|
|
</para>
|
|
<para>
|
|
<function>glNormalPointer</function> is typically implemented on the client side.
|
|
</para>
|
|
<para>
|
|
Normal array parameters are client-side state and are therefore not
|
|
saved or restored by <citerefentry><refentrytitle>glPushAttrib</refentrytitle></citerefentry> and <citerefentry><refentrytitle>glPopAttrib</refentrytitle></citerefentry>.
|
|
Use <citerefentry><refentrytitle>glPushClientAttrib</refentrytitle></citerefentry> and
|
|
<citerefentry><refentrytitle>glPopClientAttrib</refentrytitle></citerefentry> instead.
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 id="errors"><title>Errors</title>
|
|
<para>
|
|
<constant>GL_INVALID_ENUM</constant> is generated if <parameter>type</parameter> is not an accepted value.
|
|
</para>
|
|
<para>
|
|
<constant>GL_INVALID_VALUE</constant> is generated if <parameter>stride</parameter> is negative.
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 id="associatedgets"><title>Associated Gets</title>
|
|
<para>
|
|
<citerefentry><refentrytitle>glIsEnabled</refentrytitle></citerefentry> with argument <constant>GL_NORMAL_ARRAY</constant>
|
|
</para>
|
|
<para>
|
|
<citerefentry><refentrytitle>glGet</refentrytitle></citerefentry> with argument <constant>GL_NORMAL_ARRAY_TYPE</constant>
|
|
</para>
|
|
<para>
|
|
<citerefentry><refentrytitle>glGet</refentrytitle></citerefentry> with argument <constant>GL_NORMAL_ARRAY_STRIDE</constant>
|
|
</para>
|
|
<para>
|
|
<citerefentry><refentrytitle>glGet</refentrytitle></citerefentry> with argument <constant>GL_NORMAL_ARRAY_BUFFER_BINDING</constant>
|
|
</para>
|
|
<para>
|
|
<citerefentry><refentrytitle>glGet</refentrytitle></citerefentry> with argument <constant>GL_ARRAY_BUFFER_BINDING</constant>
|
|
</para>
|
|
<para>
|
|
<citerefentry><refentrytitle>glGetPointerv</refentrytitle></citerefentry> with argument <constant>GL_NORMAL_ARRAY_POINTER</constant>
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 id="seealso"><title>See Also</title>
|
|
<para>
|
|
<citerefentry><refentrytitle>glArrayElement</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glBindBuffer</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glColorPointer</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glDisableClientState</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glDrawArrays</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glDrawElements</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glDrawRangeElements</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glEdgeFlagPointer</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glEnableClientState</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glFogCoordPointer</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glIndexPointer</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glInterleavedArrays</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glMultiDrawArrays</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glMultiDrawElements</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glNormal</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glPopClientAttrib</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glPushClientAttrib</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glSecondaryColorPointer</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glTexCoordPointer</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glVertexAttribPointer</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>
|