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GLARRAYELEMENT(3G)			  OpenGL Manual 		       GLARRAYELEMENT(3G)

NAME
       glArrayElement - render a vertex using the specified vertex array element

C SPECIFICATION
       void glArrayElement(GLint i);

PARAMETERS
       i
	   Specifies an index into the enabled vertex data arrays.

DESCRIPTION
       glArrayElement commands are used within glBegin()/glEnd() pairs to specify vertex and
       attribute data for point, line, and polygon primitives. If GL_VERTEX_ARRAY is enabled when
       glArrayElement is called, a single vertex is drawn, using vertex and attribute data taken
       from location i of the enabled arrays. If GL_VERTEX_ARRAY is not enabled, no drawing
       occurs but the attributes corresponding to the enabled arrays are modified.

       Use glArrayElement to construct primitives by indexing vertex data, rather than by
       streaming through arrays of data in first-to-last order. Because each call specifies only
       a single vertex, it is possible to explicitly specify per-primitive attributes such as a
       single normal for each triangle.

       Changes made to array data between the execution of glBegin() and the corresponding
       execution of glEnd() may affect calls to glArrayElement that are made within the same
       glBegin()/glEnd() period in nonsequential ways. That is, a call to glArrayElement that
       precedes a change to array data may access the changed data, and a call that follows a
       change to array data may access original data.

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

       glArrayElement is included in display lists. If glArrayElement is entered into a display
       list, the necessary array data (determined by the array pointers and enables) is also
       entered into the display list. Because the array pointers and enables are client-side
       state, their values affect display lists when the lists are created, not when the lists
       are executed.

ERRORS
       GL_INVALID_VALUE may be generated if i is negative.

       GL_INVALID_OPERATION is generated if a non-zero buffer object name is bound to an enabled
       array and the buffer object's data store is currently mapped.

SEE ALSO
       glClientActiveTexture(), glColorPointer(), glDrawArrays(), glEdgeFlagPointer(),
       glFogCoordPointer(), glGetPointerv(), glIndexPointer(), glInterleavedArrays(),
       glNormalPointer(), glSecondaryColorPointer(), glTexCoordPointer(), glVertexPointer()

COPYRIGHT
       Copyright (C) 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				    06/10/2014			       GLARRAYELEMENT(3G)
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