glNormal

NAME

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

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 (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 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 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. Normalization is controlled using glEnable and glDisable with the argument GL_NORMALIZE. By default, normalization is disabled.

NOTES

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

glGet with argument GL_CURRENT_NORMAL
glIsEnabled with argument GL_NORMALIZE

SEE ALSO

glBegin, glColor, glIndex, glTexCoord, glVertex

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© 1995 Uwe Behrens. All rights reserved.