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GLVERTEXATTRIBPOINTE(3G)	 OpenGL Manual	      GLVERTEXATTRIBPOINTE(3G)

NAME
       glVertexAttribPointer - define an array of generic vertex attribute
       data

C SPECIFICATION
       void glVertexAttribPointer(GLuint index, GLint size, GLenum type,
				  GLboolean normalized, GLsizei stride,
				  const GLvoid * pointer);

       void glVertexAttribIPointer(GLuint index, GLint size, GLenum type,
				   GLsizei stride, const GLvoid * pointer);

       void glVertexAttribLPointer(GLuint index, GLint size, GLenum type,
				   GLsizei stride, const GLvoid * pointer);

PARAMETERS
       index
	   Specifies the index of the generic vertex attribute to be modified.

       size
	   Specifies the number of components per generic vertex attribute.
	   Must be 1, 2, 3, 4. Additionally, the symbolic constant GL_BGRA is
	   accepted by glVertexAttribPointer. The initial value is 4.

       type
	   Specifies the data type of each component in the array. The
	   symbolic constants GL_BYTE, GL_UNSIGNED_BYTE, GL_SHORT,
	   GL_UNSIGNED_SHORT, GL_INT, and GL_UNSIGNED_INT are accepted by
	   glVertexAttribPointer and glVertexAttribIPointer. Additionally
	   GL_HALF_FLOAT, GL_FLOAT, GL_DOUBLE, GL_FIXED,
	   GL_INT_2_10_10_10_REV, and GL_UNSIGNED_INT_2_10_10_10_REV are
	   accepted by glVertexAttribPointer.  GL_DOUBLE is also accepted by
	   glVertexAttribLPointer and is the only token accepted by the type
	   parameter for that function. The initial value is GL_FLOAT.

       normalized
	   For glVertexAttribPointer, specifies whether fixed-point data
	   values should be normalized (GL_TRUE) or converted directly as
	   fixed-point values (GL_FALSE) when they are accessed.

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

       pointer
	   Specifies a offset of the first component of the first generic
	   vertex attribute in the array in the data store of the buffer
	   currently bound to the GL_ARRAY_BUFFER target. The initial value is
	   0.

DESCRIPTION
       glVertexAttribPointer, glVertexAttribIPointer and
       glVertexAttribLPointer specify the location and data format of the
       array of generic vertex attributes at index index to use when
       rendering.  size specifies the number of components per attribute and
       must be 1, 2, 3, 4, or GL_BGRA.	type specifies the data type of each
       component, and stride specifies the byte stride from one attribute to
       the next, allowing vertices and attributes to be packed into a single
       array or stored in separate arrays.

       For glVertexAttribPointer, if normalized is set to GL_TRUE, it
       indicates that values stored in an integer format are to be mapped to
       the range [-1,1] (for signed values) or [0,1] (for unsigned values)
       when they are accessed and converted to floating point. Otherwise,
       values will be converted to floats directly without normalization.

       For glVertexAttribIPointer, only the integer types GL_BYTE,
       GL_UNSIGNED_BYTE, GL_SHORT, GL_UNSIGNED_SHORT, GL_INT, GL_UNSIGNED_INT
       are accepted. Values are always left as integer values.

       glVertexAttribLPointer specifies state for a generic vertex attribute
       array associated with a shader attribute variable declared with 64-bit
       double precision components.  type must be GL_DOUBLE.  index, size, and
       stride behave as described for glVertexAttribPointer and
       glVertexAttribIPointer.

       If pointer is not NULL, a non-zero named buffer object must be bound to
       the GL_ARRAY_BUFFER target (see glBindBuffer()), otherwise an error is
       generated.  pointer is treated as a byte offset into the buffer
       object's data store. The buffer object binding
       (GL_ARRAY_BUFFER_BINDING) is saved as generic vertex attribute array
       state (GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING) for index index.

       When a generic vertex attribute array is specified, size, type,
       normalized, stride, and pointer are saved as vertex array state, in
       addition to the current vertex array buffer object binding.

       To enable and disable a generic vertex attribute array, call
       glEnableVertexAttribArray() and glDisableVertexAttribArray() with
       index. If enabled, the generic vertex attribute array is used when
       glDrawArrays(), glMultiDrawArrays(), glDrawElements(),
       glMultiDrawElements(), or glDrawRangeElements() is called.

NOTES
       Each generic vertex attribute array is initially disabled and isn't
       accessed when glDrawElements(), glDrawRangeElements(), glDrawArrays(),
       glMultiDrawArrays(), or glMultiDrawElements() is called.

ERRORS
       GL_INVALID_VALUE is generated if index is greater than or equal to
       GL_MAX_VERTEX_ATTRIBS.

       GL_INVALID_VALUE is generated if size is not 1, 2, 3, 4 or (for
       glVertexAttribPointer), GL_BGRA.

       GL_INVALID_ENUM is generated if type is not an accepted value.

       GL_INVALID_VALUE is generated if stride is negative.

       GL_INVALID_OPERATION is generated if size is GL_BGRA and type is not
       GL_UNSIGNED_BYTE, GL_INT_2_10_10_10_REV or
       GL_UNSIGNED_INT_2_10_10_10_REV.

       GL_INVALID_OPERATION is generated if type is GL_INT_2_10_10_10_REV or
       GL_UNSIGNED_INT_2_10_10_10_REV and size is not 4 or GL_BGRA.

       GL_INVALID_OPERATION is generated by glVertexAttribPointer if size is
       GL_BGRA and noramlized is GL_FALSE.

       GL_INVALID_OPERATION is generated if zero is bound to the
       GL_ARRAY_BUFFER buffer object binding point and the pointer argument is
       not NULL.

ASSOCIATED GETS
       glGet() with argument GL_MAX_VERTEX_ATTRIBS

       glGetVertexAttrib() with arguments index and
       GL_VERTEX_ATTRIB_ARRAY_ENABLED

       glGetVertexAttrib() with arguments index and
       GL_VERTEX_ATTRIB_ARRAY_SIZE

       glGetVertexAttrib() with arguments index and
       GL_VERTEX_ATTRIB_ARRAY_TYPE

       glGetVertexAttrib() with arguments index and
       GL_VERTEX_ATTRIB_ARRAY_NORMALIZED

       glGetVertexAttrib() with arguments index and
       GL_VERTEX_ATTRIB_ARRAY_STRIDE

       glGetVertexAttrib() with arguments index and
       GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING

       glGet() with argument GL_ARRAY_BUFFER_BINDING

       glGetVertexAttribPointerv() with arguments index and
       GL_VERTEX_ATTRIB_ARRAY_POINTER

SEE ALSO
       glBindAttribLocation(), glBindBuffer(), glDisableVertexAttribArray(),
       glDrawArrays(), glDrawElements(), glDrawRangeElements(),
       glEnableVertexAttribArray(), glMultiDrawArrays(),
       glMultiDrawElements(), glVertexAttrib()

COPYRIGHT
       Copyright © 2003-2005 3Dlabs Inc. Ltd. This material may be distributed
       subject to the terms and conditions set forth in the Open Publication
       License, v 1.0, 8 June 1999.  http://opencontent.org/openpub/.

AUTHORS
       opengl.org

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

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