GLCLEARACCUM() MachTen Programmer’s Manual GLCLEARACCUM()

NAME
glClearAccum - specify clear values for the accumulation
buffer

C SPECIFICATION
void glClearAccum( GLfloat red,
GLfloat green,
GLfloat blue,
GLfloat alpha )

PARAMETERS
red, green, blue, alpha
Specify the red, green, blue, and
alpha values used when the accumula-
tion buffer is cleared. The initial
values are all 0.

DESCRIPTION
glClearAccum specifies the red, green, blue, and alpha
values used by glClear to clear the accumulation buffer.

Values specified by glClearAccum are clamped to the range
[-1,1].

ERRORS
GL_INVALID_OPERATION is generated if glClearAccum is exe-
cuted between the execution of glBegin and the correspond-
ing execution of glEnd.

ASSOCIATED GETS
glGet with argument GL_ACCUM_CLEAR_VALUE