GLNORMAL() MachTen Programmer’s Manual GLNORMAL()

NAME
glNormal3b, glNormal3d, glNormal3f, glNormal3i, glNor-
mal3s, glNormal3bv, glNormal3dv, glNormal3fv, glNormal3iv,
glNormal3sv - set the current normal vector

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C SPECIFICATION
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
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
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
v Specifies a pointer to an array of three elements:
the $x$, $y$, and $z$ coordinates of the new cur-
rent normal.

DESCRIPTION
The current normal is set to the given coordinates when-
ever glNormal is issued. Byte, short, or integer argu-
ments are converted to floating-point 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 normalization is enabled, then normals specified with
glNormal are normalized after transformation. To enable
and disable normalization, call glEnable and glDisable
with the argument GL_NORMALIZE. Normalization is ini-
tially disabled.

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

ASSOCIATED GETS
glGet with argument GL_CURRENT_NORMAL
glIsEnabled with argument GL_NORMALIZE

SEE ALSO
glBegin, glColor, glIndex, glNormalPointer, glTexCoord,
glVertex

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