- specify the clear value for the color index buffers
C SPECIFICATION
PARAMETERS
_param1 Specifies the index used when the color index
buffers are cleared. The initial value is 0.
DESCRIPTION
glClearIndex specifies the index used by glClear to clear
the color index buffers. _param1 is not clamped. Rather,
_param1 is converted to a fixed-point value with unspeci-
fied precision to the right of the binary point. The
integer part of this value is then masked with 2m-1, where
m is the number of bits in a color index stored in the
frame buffer.
ERRORS
GL_INVALID_OPERATION is generated if glClearIndex is exe-
cuted between the execution of glBegin and the correspond-
ing execution of glEnd.
ASSOCIATED GETS
glGet with argument GL_INDEX_CLEAR_VALUE
glGet with argument GL_INDEX_BITS
SEE ALSO
glClear
1