1991-2006
Silicon Graphics, Inc.
glIndex
3G
glIndex
set the current color index
C Specification
void glIndexs
GLshort c
void glIndexi
GLint c
void glIndexf
GLfloat c
void glIndexd
GLdouble c
void glIndexub
GLubyte c
Parameters
c
Specifies the new value for the current color index.
C Specification
void glIndexsv
const GLshort * c
void glIndexiv
const GLint * c
void glIndexfv
const GLfloat * c
void glIndexdv
const GLdouble * 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.
Associated Gets
glGet with argument GL_CURRENT_INDEX
See Also
glColor,
glIndexPointer
Copyright
Copyright 1991-2006
Silicon Graphics, Inc. This document is licensed under the SGI
Free Software B License. For details, see
http://oss.sgi.com/projects/FreeB/.