'\"! eqn | mmdoc
'\"macro stdmacro
.ds Vn Version 1.2
.ds Dt 6 March 1997
.ds Re Release 1.1.0
.ds Dp Mar 17 18:03
.ds Dm  Mar  6 20:0
.ds Xs 29094 3 clearindex.gl
.TH GLCLEARINDEX
.SH NAME
.B "glClearIndex
\- specify the clear value for the color index buffers

.SH C SPECIFICATION
void \f3glClearIndex\fP(
GLfloat \fIc\fP )
.nf
.fi

.EQ
delim $$
.EN
.SH PARAMETERS
.TP \w'\f2c\fP\ \ 'u 
\f2c\fP
Specifies the index used when the color index buffers are cleared.
The initial value is 0.
.SH DESCRIPTION
\f3glClearIndex\fP specifies the index used by \f3glClear\fP
to clear the color index buffers.
\f2c\fP is not clamped.
Rather,
\f2c\fP is converted to a fixed-point value with unspecified precision
to the right of the binary point.
The integer part of this value is then masked with $2 sup m -1$,
where $m$ is the number of bits in a color index stored in the frame buffer.
.SH ERRORS
\f3GL_INVALID_OPERATION\fP is generated if \f3glClearIndex\fP
is executed between the execution of \f3glBegin\fP
and the corresponding execution of \f3glEnd\fP.
.SH ASSOCIATED GETS
\f3glGet\fP with argument \f3GL_INDEX_CLEAR_VALUE\fP
.br
\f3glGet\fP with argument \f3GL_INDEX_BITS\fP
.SH SEE ALSO
\f3glClear\fP