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glman函数说明 glman函数说明 glman函数说明

	  <STRONG>GL_MODELVIEW_MATRIX</STRONG>	   <EM>params</EM> returns sixteen values:  the
				   modelview matrix on the top of the
				   modelview matrix stack. Initially
				   this	matrix is the identity matrix.
				   See <STRONG>glPushMatrix</STRONG>.

	  <STRONG>GL_MODELVIEW_STACK_DEPTH</STRONG> <EM>params</EM> returns one value, the
				   number of matrices on the modelview
				   matrix stack.  The initial value is
				   1.  See <STRONG>glPushMatrix</STRONG>.

	  <STRONG>GL_NAME_STACK_DEPTH</STRONG>	   <EM>params</EM> returns one value, the
				   number of names on the selection
				   name	stack. The initial value is 0.
				   See <STRONG>glPushName</STRONG>.

	  <STRONG>GL_NORMAL_ARRAY</STRONG>	   <EM>params</EM> returns a single boolean
				   value, indicating whether the
				   normal array	is enabled. The
				   initial value is <STRONG>GL_FALSE</STRONG>. See
				   <STRONG>glNormalPointer</STRONG>.

	  <STRONG>GL_NORMAL_ARRAY_STRIDE</STRONG>   <EM>params</EM> returns one value, the byte
				   offset between consecutive normals
				   in the normal array.	The initial
				   value is 0. See <STRONG>glNormalPointer</STRONG>.

	  <STRONG>GL_NORMAL_ARRAY_TYPE</STRONG>	   <EM>params</EM> returns one value, the data
				   type	of each	coordinate in the
				   normal array. The initial value is
				   <STRONG>GL_FLOAT</STRONG>. See <STRONG>glNormalPointer</STRONG>.

	  <STRONG>GL_NORMALIZE</STRONG>		   <EM>params</EM> returns a single boolean
				   value indicating whether normals
				   are automatically scaled to unit
				   length after	they have been
				   transformed to eye coordinates. The
				   initial value is <STRONG>GL_FALSE</STRONG>. See
				   <STRONG>glNormal</STRONG>.

	  <STRONG>GL_PACK_ALIGNMENT</STRONG>	   <EM>params</EM> returns one value, the byte
				   alignment used for writing pixel
				   data	to memory. The initial value
				   is 4. See <STRONG>glPixelStore</STRONG>.

	  <STRONG>GL_PACK_LSB_FIRST</STRONG>	   <EM>params</EM> returns a single boolean
				   value indicating whether single-bit
				   pixels being	written	to memory are
				   written first to the	least
				   significant bit of each unsigned
				   byte. The initial value is
				   <STRONG>GL_FALSE</STRONG>. See <STRONG>glPixelStore</STRONG>.

	  <STRONG>GL_PACK_ROW_LENGTH</STRONG>	   <EM>params</EM> returns one value, the row
				   length used for writing pixel data
				   to memory. The initial value	is 0.
				   See <STRONG>glPixelStore</STRONG>.

	  <STRONG>GL_PACK_SKIP_PIXELS</STRONG>	   <EM>params</EM> returns one value, the
				   number of pixel locations skipped
				   before the first pixel is written
				   into	memory.	The initial value is
				   0. See <STRONG>glPixelStore</STRONG>.

	  <STRONG>GL_PACK_SKIP_ROWS</STRONG>	   <EM>params</EM> returns one value, the
				   number of rows of pixel locations
				   skipped before the first pixel is
				   written into	memory.	The initial
				   value is 0. See <STRONG>glPixelStore</STRONG>.

	  <STRONG>GL_PACK_SWAP_BYTES</STRONG>	   <EM>params</EM> returns a single boolean
				   value indicating whether the	bytes
				   of two-byte and four-byte pixel
				   indices and components are swapped
				   before being	written	to memory. The
				   initial value is <STRONG>GL_FALSE</STRONG>. See
				   <STRONG>glPixelStore</STRONG>.

	  <STRONG>GL_PERSPECTIVE_CORRECTION_HINT</STRONG>
				   <EM>params</EM> returns one value, a
				   symbolic constant indicating	the
				   mode	of the perspective correction
				   hint. The initial value is
				   <STRONG>GL_DONT_CARE</STRONG>. See <STRONG>glHint</STRONG>.

	  <STRONG>GL_PIXEL_MAP_A_TO_A_SIZE</STRONG> <EM>params</EM> returns one value, the size
				   of the alpha-to-alpha pixel
				   translation table.  The initial
				   value is 1.	See <STRONG>glPixelMap</STRONG>.

	  <STRONG>GL_PIXEL_MAP_B_TO_B_SIZE</STRONG> <EM>params</EM> returns one value, the size
				   of the blue-to-blue pixel
				   translation table.  The initial
				   value is 1.	See <STRONG>glPixelMap</STRONG>.

	  <STRONG>GL_PIXEL_MAP_G_TO_G_SIZE</STRONG> <EM>params</EM> returns one value, the size
				   of the green-to-green pixel
				   translation table.  The initial
				   value is 1.	See <STRONG>glPixelMap</STRONG>.

	  <STRONG>GL_PIXEL_MAP_I_TO_A_SIZE</STRONG> <EM>params</EM> returns one value, the size
				   of the index-to-alpha pixel
				   translation table.  The initial
				   value is 1.	See <STRONG>glPixelMap</STRONG>.

	  <STRONG>GL_PIXEL_MAP_I_TO_B_SIZE</STRONG> <EM>params</EM> returns one value, the size
				   of the index-to-blue	pixel
				   translation table.  The initial
				   value is 1.	See <STRONG>glPixelMap</STRONG>.

	  <STRONG>GL_PIXEL_MAP_I_TO_G_SIZE</STRONG> <EM>params</EM> returns one value, the size
				   of the index-to-green pixel
				   translation table.  The initial
				   value is 1.	See <STRONG>glPixelMap</STRONG>.

	  <STRONG>GL_PIXEL_MAP_I_TO_I_SIZE</STRONG> <EM>params</EM> returns one value, the size
				   of the index-to-index pixel
				   translation table.  The initial
				   value is 1.	See <STRONG>glPixelMap</STRONG>.

	  <STRONG>GL_PIXEL_MAP_I_TO_R_SIZE</STRONG> <EM>params</EM> returns one value, the size
				   of the index-to-red pixel
				   translation table.  The initial
				   value is 1.	See <STRONG>glPixelMap</STRONG>.

	  <STRONG>GL_PIXEL_MAP_R_TO_R_SIZE</STRONG> <EM>params</EM> returns one value, the size
				   of the red-to-red pixel translation
				   table.  The initial value is	1.
				   See <STRONG>glPixelMap</STRONG>.

	  <STRONG>GL_PIXEL_MAP_S_TO_S_SIZE</STRONG> <EM>params</EM> returns one value, the size
				   of the stencil-to-stencil pixel
				   translation table.  The initial
				   value is 1.	See <STRONG>glPixelMap</STRONG>.

	  <STRONG>GL_POINT_SIZE</STRONG>		   <EM>params</EM> returns one value, the point
				   size	as specified by	<STRONG>glPointSize</STRONG>.
				   The initial value is	1.

	  <STRONG>GL_POINT_SIZE_GRANULARITY</STRONG>
				   <EM>params</EM> returns one value, the size
				   difference between adjacent
				   supported sizes for antialiased
				   points.  See	<STRONG>glPointSize</STRONG>.

	  <STRONG>GL_POINT_SIZE_RANGE</STRONG>	   <EM>params</EM> returns two values:  the
				   smallest and	largest	supported
				   sizes for antialiased points. The
				   smallest size must be at most 1,
				   and the largest size	must be	at
				   least 1.  See <STRONG>glPointSize</STRONG>.

	  <STRONG>GL_POINT_SMOOTH</STRONG>	   <EM>params</EM> returns a single boolean
				   value indicating whether
				   antialiasing	of points is enabled.
				   The initial value is	<STRONG>GL_FALSE</STRONG>. See
				   <STRONG>glPointSize</STRONG>.

	  <STRONG>GL_POINT_SMOOTH_HINT</STRONG>	   <EM>params</EM> returns one value, a
				   symbolic constant indicating	the
				   mode	of the point antialiasing
				   hint. The initial value is
				   <STRONG>GL_DONT_CARE</STRONG>.  See <STRONG>glHint</STRONG>.

	  <STRONG>GL_POLYGON_MODE</STRONG>	   <EM>params</EM> returns two values:
				   symbolic constants indicating
				   whether front-facing	and back-
				   facing polygons are rasterized as
				   points, lines, or filled polygons.
				   The initial value is	<STRONG>GL_FILL</STRONG>. See
				   <STRONG>glPolygonMode</STRONG>.

	  <STRONG>GL_POLYGON_OFFSET_FACTOR</STRONG> <EM>params</EM> returns one value, the
				   scaling factor used to determine
				   the variable	offset that is added
				   to the depth	value of each fragment
				   generated when a polygon is
				   rasterized. The initial value is 0.
				   See <STRONG>glPolygonOffset</STRONG>.

	  <STRONG>GL_POLYGON_OFFSET_UNITS</STRONG>  <EM>params</EM> returns one value.  This
				   value is multiplied by an
				   implementation-specific value and
				   then	added to the depth value of
				   each	fragment generated when	a
				   polygon is rasterized. The initial
				   value is 0. See <STRONG>glPolygonOffset</STRONG>.

	  <STRONG>GL_POLYGON_OFFSET_FILL</STRONG>   <EM>params</EM> returns a single boolean
				   value indicating whether polygon
				   offset is enabled for polygons in
				   fill	mode. The initial value	is
				   <STRONG>GL_FALSE</STRONG>.  See <STRONG>glPolygonOffset</STRONG>.

	  <STRONG>GL_POLYGON_OFFSET_LINE</STRONG>   <EM>params</EM> returns a single boolean
				   value indicating whether polygon
				   offset is enabled for polygons in
				   line	mode. The initial value	is
				   <STRONG>GL_FALSE</STRONG>.  See <STRONG>glPolygonOffset</STRONG>.

	  <STRONG>GL_POLYGON_OFFSET_POINT</STRONG>  <EM>params</EM> returns a single boolean
				   value indicating whether polygon
				   offset is enabled for polygons in
				   point mode. The initial value is
				   <STRONG>GL_FALSE</STRONG>. See <STRONG>glPolygonOffset</STRONG>.

	  <STRONG>GL_POLYGON_SMOOTH</STRONG>	   <EM>params</EM> returns a single boolean
				   value indicating whether
				   antialiasing	of polygons is
				   enabled. The	initial	value is
				   <STRONG>GL_FALSE</STRONG>. See <STRONG>glPolygonMode</STRONG>.

	  <STRONG>GL_POLYGON_SMOOTH_HINT</STRONG>   <EM>params</EM> returns one value, a
				   symbolic constant indicating	the
				   mode	of the polygon antialiasing
				   hint. The initial value is
				   <STRONG>GL_DONT_CARE</STRONG>.  See <STRONG>glHint</STRONG>.

	  <STRONG>GL_POLYGON_STIPPLE</STRONG>	   <EM>params</EM> returns a single boolean
				   value indicating whether polygon
				   stippling is	enabled. The initial
				   value is <STRONG>GL_FALSE</STRONG>. See
				   <STRONG>glPolygonStipple</STRONG>.

	  <STRONG>GL_PROJECTION_MATRIX</STRONG>	   <EM>params</EM> returns sixteen values:  the
				   projection matrix on	the top	of the
				   projection matrix stack. Initially
				   this	matrix is the identity matrix.
				   See <STRONG>glPushMatrix</STRONG>.

	  <STRONG>GL_PROJECTION_STACK_DEPTH</STRONG>
				   <EM>params</EM> returns one value, the
				   number of matrices on the
				   projection matrix stack.  The
				   initial value is 1.	See
				   <STRONG>glPushMatrix</STRONG>.

	  <STRONG>GL_READ_BUFFER</STRONG>	   <EM>params</EM> returns one value, a
				   symbolic constant indicating	which
				   color buffer	is selected for
				   reading. The	initial	value is
				   <STRONG>GL_BACK</STRONG> if there is a back buffer,
				   otherwise it	is <STRONG>GL_FRONT</STRONG>.  See
				   <STRONG>glReadPixels</STRONG>	and <STRONG>glAccum</STRONG>.

	  <STRONG>GL_RED_BIAS</STRONG>		   <EM>params</EM> returns one value, the red
				   bias	factor used during pixel
				   transfers. The initial value	is 0.

	  <STRONG>GL_RED_BITS</STRONG>		   <EM>params</EM> returns one value, the
				   number of red bitplanes in each
				   color buffer.

	  <STRONG>GL_RED_SCALE</STRONG>		   <EM>params</EM> returns one value, the red
				   scale factor	used during pixel
				   transfers. The initial value	is 1.
				   See <STRONG>glPixelTransfer</STRONG>.

	  <STRONG>GL_RENDER_MODE</STRONG>	   <EM>params</EM> returns one value, a
				   symbolic constant indicating
				   whether the GL is in	render,
				   select, or feedback mode. The
				   initial value is <STRONG>GL_RENDER</STRONG>. See
				   <STRONG>glRenderMode</STRONG>.

	  <STRONG>GL_RGBA_MODE</STRONG>		   <EM>params</EM> returns a single boolean
				   value indicating whether the	GL is
				   in RGBA mode	(true) or color	index
				   mode	(false).  See <STRONG>glColor</STRONG>.

	  <STRONG>GL_SCISSOR_BOX</STRONG>	   <EM>params</EM> returns four values:	the x
				   and y window	coordinates of the
				   scissor box,	followed by its	width
				   and height. Initially the x and y
				   window coordinates are both 0 and
				   the width and height	are set	to the
				   size	of the window.	See <STRONG>glScissor</STRONG>.

	  <STRONG>GL_SCISSOR_TEST</STRONG>	   <EM>params</EM> returns a single boolean
				   value indicating whether scissoring
				   is enabled. The initial value is
				   <STRONG>GL_FALSE</STRONG>.  See <STRONG>glScissor</STRONG>.

	  <STRONG>GL_SHADE_MODEL</STRONG>	   <EM>params</EM> returns one value, a
				   symbolic constant indicating
				   whether the shading mode is flat or
				   smooth. The initial value is
				   <STRONG>GL_SMOOTH</STRONG>. See <STRONG>glShadeModel</STRONG>.

	  <STRONG>GL_STENCIL_BITS</STRONG>	   <EM>params</EM> returns one value, the
				   number of bitplanes in the stencil
				   buffer.

	  <STRONG>GL_STENCIL_CLEAR_VALUE</STRONG>   <EM>params</EM> returns one value, the index
				   to which the	stencil	bitplanes are
				   cleared. The	initial	value is 0.
				   See <STRONG>glClearStencil</STRONG>.

	  <STRONG>GL_STENCIL_FAIL</STRONG>	   <EM>params</EM> returns one value, a
				   symbolic constant indicating	what
				   action is taken when	the stencil
				   test	fails. The initial value is
				   <STRONG>GL_KEEP</STRONG>. See	<STRONG>glStencilOp</STRONG>.