GLsizei strid )

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

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

       _param3
              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 the nor‐
       mal coordinates and strid gives the byte stride from one normal  to  the
       next,  allowing vertexes and attributes to be packed into a single array
       or stored in separate arrays.  (Single-array storage may be  more  effi‐
       cient  on some implementations; see glInterleavedArrays.)  When a normal
       array is specified, type, strid, and _param3 are  saved  as  client-side
       state.

       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,   glDrawElements,   or
       glArrayElement is called.

       Use glDrawArrays to construct a sequence of primitives (all of the  same
       type)  from  prespecified  vertex  and  vertex  attribute  arrays.   Use
       glArrayElement to specify primitives by indexing vertexes and vertex at‐
       tributes and glDrawElements to construct a sequence of primitives by in‐
       dexing vertexes and vertex attributes.

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, or glDrawArrays is called.

       Execution of glNormalPointer is not allowed between glBegin and the cor‐
       responding 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.

       Since  the  normal  array parameters are client-side state, they are not
       saved   or   restored   by   glPushAttrib    and    glPopAttrib.     Use
       glPushClientAttrib and glPopClientAttrib instead.

       glInterleavedArrays,        glPopClientAttrib,       glPushClientAttrib,
       glTexCoordPointer, glVertexPointer

                                                            GLNORMALPOINTER(3G)