Интерактивная система просмотра системных руководств (man-ов)
glClearIndex (3)
>> glClearIndex (3) ( Разные man: Библиотечные вызовы )
NAME
glClearIndex
- specify the clear value for the color index buffers
C SPECIFICATION
void glClearIndex(
GLfloat c )
delim $$
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 $2 sup m^-^1$,
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