glIndex(3G) OpenGL Reference glIndex(3G)
NAME
glIndexd, glIndexf, glIndexi, glIndexs, glIndexub, glIndexdv, glIndexfv,
glIndexiv, glIndexsv, glIndexubv - set the current color index
C SPECIFICATION
void glIndexd( GLdouble c )
void glIndexf( GLfloat c )
void glIndexi( GLint c )
void glIndexs( GLshort c )
void glIndexub( GLubyte c )
PARAMETERS
c Specifies the new value for the current color index.
C SPECIFICATION
void glIndexdv( const GLdouble *c )
void glIndexfv( const GLfloat *c )
void glIndexiv( const GLint *c )
void glIndexsv( const GLshort *c )
void glIndexubv( const GLubyte *c )
PARAMETERS
c Specifies a pointer to a one-element array that contains the new
value for the current color index.
DESCRIPTION
glIndex updates the current (single-valued) color index. It takes one
argument: the new value for the current color index.
The current index is stored as a floating-point value. Integer values
are converted directly to floating-point values, with no special mapping.
The initial value is 1.
Index values outside the representable range of the color index buffer
are not clamped. However, before an index is dithered (if enabled) and
written to the frame buffer, it is converted to fixed-point format. Any
bits in the integer portion of the resulting fixed-point value that do
not correspond to bits in the frame buffer are masked out.
NOTES
glIndexub and glIndexubv are available only if the GL version is 1.1 or
greater.
The current index can be updated at any time. In particular, glIndex can
be called between a call to glBegin and the corresponding call to glEnd.
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glIndex(3G) OpenGL Reference glIndex(3G)
ASSOCIATED GETS
glGet with argument GLCURRENTINDEX
SEE ALSO
glColor, glIndexPointer
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