# Method GL.glClear()

Method glClear

  `void glClear(int mask)`

Description

  glClear sets the bitplane area of the window to values previously selected by glClearColor, glClearIndex, glClearDepth, glClearStencil, and glClearAccum. Multiple color buffers can be cleared simultaneously by selecting more than one buffer at a time using glDrawBuffer.

  The pixel ownership test, the scissor test, dithering, and the buffer writemasks affect the operation of glClear. The scissor box bounds the cleared region. Alpha function, blend function, logical operation, stenciling, texture mapping, and depth-buffering are ignored by glClear.

  glClear takes a single argument that is the bitwise OR of several values indicating which buffer is to be cleared.

  The values are as follows:

  GL_COLOR_BUFFER_BIT | Indicates the buffers currently enabled for color writing.
  GL_DEPTH_BUFFER_BIT | Indicates the depth buffer.
  GL_ACCUM_BUFFER_BIT | Indicates the accumulation buffer.
  GL_STENCIL_BUFFER_BIT | Indicates the stencil buffer.

  The value to which each buffer is cleared depends on the setting of the clear value for that buffer.

Parameter `mask`

  Bitwise OR of masks that indicate the buffers to be cleared. The four masks are GL_COLOR_BUFFER_BIT, GL_DEPTH_BUFFER_BIT, GL_ACCUM_BUFFER_BIT, and GL_STENCIL_BUFFER_BIT.

Throws

  GL_INVALID_VALUE is generated if any bit other than the four defined bits is set in mask.

  GL_INVALID_OPERATION is generated if glClear is executed between the execution of glBegin and the corresponding execution of glEnd.