glNormal(3G)glNormal(3G)NAME
glNormal, glNormal3b, glNormal3d, glNormal3f, glNormal3i, glNormal3s,
glNormal3bv, glNormal3dv, glNormal3fv, glNormal3iv, glNormal3sv - set
the current normal vector
SYNOPSIS
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
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).
SYNOPSIS
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
Specifies a pointer to an array of three elements: the x, y, and z
coordinates of the new current normal.
DESCRIPTION
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.
NOTES
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().
ASSOCIATED GETSglGet() with argument GL_CURRENT_NORMAL
glIsEnabled() with argument GL_NORMALIZE
glIsEnabled() with argument GL_RESCALE_NORMAL
SEE ALSOglBegin(3), glColor(3), glIndex(3), glNormalPointer(3), glTexCoord(3),
glVertex(3)glNormal(3G)