GLCLEARDEPTH(3G) [FIXME: manual] GLCLEARDEPTH(3G)NAME
glClearDepth - specify the clear value for the depth buffer
C SPECIFICATION
void glClearDepth(GLdouble depth);
void glClearDepthf(GLfloat depth);
PARAMETERS
depth
Specifies the depth value used when the depth buffer is cleared. The initial value is 1.
DESCRIPTION
glClearDepth specifies the depth value used by glClear() to clear the depth buffer. Values specified by glClearDepth are clamped to the
range 0 1.
NOTES
The type of the depth parameter was changed from GLclampf to GLfloat for glClearDepthf and from GLclampd to GLdouble for glClearDepth. This
change is transparent to user code and is described in detail on the removedTypes() page.
ASSOCIATED GETS
glGet() with argument GL_DEPTH_CLEAR_VALUE
SEE ALSO
glClear(), removedTypes()
COPYRIGHT
Copyright (C) 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see
http://oss.sgi.com/projects/FreeB/.
[FIXME: source] 05/30/2012 GLCLEARDEPTH(3G)
Check Out this Related Man Page
GLCLEAR(3G) [FIXME: manual] GLCLEAR(3G)NAME
glClear - clear buffers to preset values
C SPECIFICATION
void glClear(GLbitfield mask);
PARAMETERS
mask
Bitwise OR of masks that indicate the buffers to be cleared. The three masks are GL_COLOR_BUFFER_BIT, GL_DEPTH_BUFFER_BIT, and
GL_STENCIL_BUFFER_BIT.
DESCRIPTION
glClear sets the bitplane area of the window to values previously selected by glClearColor, glClearDepth, and glClearStencil. 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_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.
NOTES
If a buffer is not present, then a glClear directed at that buffer has no effect.
ERRORS
GL_INVALID_VALUE is generated if any bit other than the three defined bits is set in mask.
ASSOCIATED GETS
glGet() with argument GL_DEPTH_CLEAR_VALUE
glGet() with argument GL_COLOR_CLEAR_VALUE
glGet() with argument GL_STENCIL_CLEAR_VALUE
SEE ALSO
glClearColor, glClearDepth, glClearStencil, glColorMask(), glDepthMask(), glDrawBuffer(), glScissor(), glStencilMask()
COPYRIGHT
Copyright (C) 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see
http://oss.sgi.com/projects/FreeB/.
[FIXME: source] 05/30/2012 GLCLEAR(3G)
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