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GLNORMALPOINTER(3G)		 OpenGL Manual		   GLNORMALPOINTER(3G)

NAME
       glNormalPointer - define an array of normals

C SPECIFICATION
       void glNormalPointer(GLenum type, GLsizei stride,
			    const GLvoid * pointer);

PARAMETERS
       type
	   Specifies the data type of each coordinate in the array. Symbolic
	   constants GL_BYTE, GL_SHORT, GL_INT, GL_FLOAT, and GL_DOUBLE are
	   accepted. The initial value is GL_FLOAT.

       stride
	   Specifies the byte offset between consecutive normals. If stride is
	   0, the normals are understood to be tightly packed in the array.
	   The initial value is 0.

       pointer
	   Specifies a pointer to the first coordinate of the first normal in
	   the array. The initial value is 0.

DESCRIPTION
       glNormalPointer specifies the location and data format of an array of
       normals to use when rendering.  type specifies the data type of each
       normal coordinate, and stride 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 glInterleavedArrays().)

       If a non-zero named buffer object is bound to the GL_ARRAY_BUFFER
       target (see glBindBuffer()) while a normal array is specified, pointer
       is treated as a byte offset into the buffer object's data store. Also,
       the buffer object binding (GL_ARRAY_BUFFER_BINDING) is saved as normal
       vertex array client-side state (GL_NORMAL_ARRAY_BUFFER_BINDING).

       When a normal array is specified, type, stride, and pointer are saved
       as client-side state, in addition to the current vertex array buffer
       object binding.

       To enable and disable the normal array, call glEnableClientState() and
       glDisableClientState() with the argument GL_NORMAL_ARRAY. If enabled,
       the normal array is used when glDrawArrays(), glMultiDrawArrays(),
       glDrawElements(), glMultiDrawElements(), glDrawRangeElements(), or
       glArrayElement() is called.

NOTES
       glNormalPointer is available only if the GL version is 1.1 or greater.

       The normal array is initially disabled and isn't accessed when
       glArrayElement(), glDrawElements(), glDrawRangeElements(),
       glDrawArrays(), glMultiDrawArrays(), or glMultiDrawElements() is
       called.

       Execution of glNormalPointer is not allowed between glBegin() and the
       corresponding glEnd(), but an error may or may not be generated. If an
       error is not generated, the operation is undefined.

       glNormalPointer is typically implemented on the client side.

       Normal array parameters are client-side state and are therefore not
       saved or restored by glPushAttrib() and glPopAttrib(). Use
       glPushClientAttrib() and glPopClientAttrib() instead.

ERRORS
       GL_INVALID_ENUM is generated if type is not an accepted value.

       GL_INVALID_VALUE is generated if stride is negative.

ASSOCIATED GETS
       glIsEnabled() with argument GL_NORMAL_ARRAY

       glGet() with argument GL_NORMAL_ARRAY_TYPE

       glGet() with argument GL_NORMAL_ARRAY_STRIDE

       glGet() with argument GL_NORMAL_ARRAY_BUFFER_BINDING

       glGet() with argument GL_ARRAY_BUFFER_BINDING

       glGetPointerv() with argument GL_NORMAL_ARRAY_POINTER

SEE ALSO
       glArrayElement(), glBindBuffer(), glColorPointer(),
       glDisableClientState(), glDrawArrays(), glDrawElements(),
       glDrawRangeElements(), glEdgeFlagPointer(), glEnableClientState(),
       glFogCoordPointer(), glIndexPointer(), glInterleavedArrays(),
       glMultiDrawArrays(), glMultiDrawElements(), glNormal(),
       glPopClientAttrib(), glPushClientAttrib(), glSecondaryColorPointer(),
       glTexCoordPointer(), glVertexAttribPointer(), glVertexPointer()

COPYRIGHT
       Copyright © 1991-2006 Silicon Graphics, Inc. This document is licensed
       under the SGI Free Software B License. For details, see
       http://oss.sgi.com/projects/FreeB/.

AUTHORS
       opengl.org

opengl.org			  04/29/2014		   GLNORMALPOINTER(3G)

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