glClearAccum function

The glClearAccum function specifies the clear values for the accumulation buffer.

Syntax

void WINAPI glClearAccum(
   GLfloat red,
   GLfloat green,
   GLfloat blue,
   GLfloat alpha
);

red: The red value used when the accumulation buffer is cleared. The default value is zero.
green: The green value used when the accumulation buffer is cleared. The default value is zero.
blue: The blue value used when the accumulation buffer is cleared. The default value is zero.
alpha: The alpha value used when the accumulation buffer is cleared. The default value is zero.

This function does not return a value.

The following error code can be retrieved by the glGetError function.

Name	Meaning
GL_INVALID_OPERATION	The function was called between a call to glBegin and the corresponding call to glEnd.

The glClearAccum function 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].

The following function retrieves information related to glClearAccum:

glGet with argument GL_ACCUM_CLEAR_VALUE

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Header	Gl.h
Library	Opengl32.lib
DLL	Opengl32.dll