glClearIndex - specify the clear value for the color index buffers
C SPECIFICATION
void glClearIndex(GLfloat c)
PARAMETERS
c
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. c is not clamped. Rather, c 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 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
executed between the execution of glBegin and the
corresponding execution of glEnd.
ASSOCIATED GETS
glGet with argument GL_INDEX_CLEAR_VALUE glGet with argument GL_INDEX_BITS