glNormal man page on DigitalUNIX

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glNormal(3G)							  glNormal(3G)

       glNormal,  glNormal3b,  glNormal3d, glNormal3f, glNormal3i, glNormal3s,
       glNormal3bv, glNormal3dv, glNormal3fv, glNormal3iv, glNormal3sv	-  set
       the current normal vector

       void glNormal3b(
	       GLbyte nx,
	       GLbyte ny,
	       GLbyte nz ); void glNormal3d(
	       GLdouble nx,
	       GLdouble ny,
	       GLdouble nz ); void glNormal3f(
	       GLfloat nx,
	       GLfloat ny,
	       GLfloat nz ); void glNormal3i(
	       GLint nx,
	       GLint ny,
	       GLint nz ); void glNormal3s(
	       GLshort nx,
	       GLshort ny,
	       GLshort nz );

       Specify the x, y, and z coordinates of the new current normal. The ini‐
       tial value of the current normal is the unit vector, (0, 0, 1).

       void glNormal3bv(
	       const GLbyte *v ); void glNormal3dv(
	       const GLdouble *v ); void glNormal3fv(
	       const GLfloat *v ); void glNormal3iv(
	       const GLint *v ); void glNormal3sv(
	       const GLshort *v );

       Specifies a pointer to an array of three elements:  the	x,  y,	and  z
       coordinates of the new current normal.

       The  current normal is set to the given coordinates whenever glNormal()
       is issued. Byte, short, or integer arguments are converted to floating-
       point   with a linear mapping that maps the most positive representable
       integer value to 1.0, and the most negative representable integer value
       to -1.0.

       Normals specified with glNormal() need not have unit length. If GL_NOR‐
       MALIZE is enabled, then normals of any length specified with glNormal()
       are  normalized after transformation.  If GL_RESCALE_NORMAL is enabled,
       normals are scaled by a	scaling	 factor	 derived  from	the  modelview
       matrix.	 GL_RESCALE_NORMAL requires that the originally specified nor‐
       mals were of unit length, and that the modelview	 matrix	 contain  only
       uniform	scales	for  proper results.  To enable and disable normaliza‐
       tion, call glEnable()  and  glDisable()	with  either  GL_NORMALIZE  or
       GL_RESCALE_NORMAL. Normalization is initially disabled.

       The  current  normal  can be updated at any time. In particular, glNor‐
       mal() can be called between a call to glBegin() and  the	 corresponding
       call to glEnd().

       glGet() with argument GL_CURRENT_NORMAL
       glIsEnabled() with argument GL_NORMALIZE
       glIsEnabled() with argument GL_RESCALE_NORMAL

       glBegin(3),  glColor(3), glIndex(3), glNormalPointer(3), glTexCoord(3),


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