glNormal(3G)		       OpenGL Reference			  glNormal(3G)

NAME    [Toc]    [Back]

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

C SPECIFICATION    [Toc]    [Back]

     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 )

PARAMETERS    [Toc]    [Back]

     nx, ny, nz
	       Specify the x, y, and z coordinates of the new current normal.
	       The initial value of the	current	normal is the unit vector, (0,
	       0, 1).

C SPECIFICATION    [Toc]    [Back]

     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	)

PARAMETERS    [Toc]    [Back]

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

DESCRIPTION    [Toc]    [Back]

     The current normal	is set to the given coordinates	whenever glNormal is
     issued.  Byte, short, or integer arguments	are converted to floatingpoint
 format 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_NORMALIZE is enabled, then normals of any length specified with
     glNormal are normalized after transformation.  If GL_RESCALE_NORMAL is



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glNormal(3G)		       OpenGL Reference			  glNormal(3G)



     enabled, normals are scaled by a scaling factor derived from the
     modelview matrix.	GL_RESCALE_NORMAL requires that	the originally
     specified normals were of unit length, and	that the modelview matrix
     contain only uniform scales for proper results.  To enable	and disable
     normalization, call glEnable and glDisable	with either GL_NORMALIZE or
     GL_RESCALE_NORMAL.	 Normalization is initially disabled.

NOTES    [Toc]    [Back]

     The current normal	can be updated at any time.  In	particular, glNormal
     can be called between a call to glBegin and the corresponding call	to
     glEnd.

ASSOCIATED GETS    [Toc]    [Back]

     glGet with	argument GL_CURRENT_NORMAL
     glIsEnabled with argument GL_NORMALIZE
     glIsEnabled with argument GL_RESCALE_NORMAL

SEE ALSO    [Toc]    [Back]

     glBegin, glColor, glIndex,	glNormalPointer, glTexCoord, glVertex


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