Login or Register to Ask a Question and Join Our Community

Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

glpolygonmode(3g) [suse man page]

GLPOLYGONMODE(3G)														 GLPOLYGONMODE(3G)

NAME

       glPolygonMode - select a polygon rasterization mode

C SPECIFICATION

       void glPolygonMode( GLenum face,
			   GLenum mode )

PARAMETERS

       face  Specifies	the  polygons  that  mode  applies  to.   Must be GL_FRONT for front-facing polygons, GL_BACK for back-facing polygons, or
	     GL_FRONT_AND_BACK for front- and back-facing polygons.

       mode  Specifies how polygons will be rasterized.  Accepted values are GL_POINT, GL_LINE, and GL_FILL.  The initial  value  is  GL_FILL  for
	     both front- and back-facing polygons.

DESCRIPTION

       glPolygonMode controls the interpretation of polygons for rasterization.  face describes which polygons mode applies to: front-facing poly-
       gons (GL_FRONT), back-facing polygons (GL_BACK), or both (GL_FRONT_AND_BACK).  The polygon mode affects only  the  final  rasterization	of
       polygons.  In particular, a polygon's vertices are lit and the polygon is clipped and possibly culled before these modes are applied.

       Three modes are defined and can be specified in mode:

       GL_POINT      Polygon vertices that are marked as the start of a boundary edge are drawn as points.  Point attributes such as GL_POINT_SIZE
		     and GL_POINT_SMOOTH control the rasterization of the points.  Polygon rasterization  attributes  other  than  GL_POLYGON_MODE
		     have no effect.

       GL_LINE	     Boundary  edges  of  the polygon are drawn as line segments.  They are treated as connected line segments for line stippling;
		     the line stipple counter and  pattern  are  not  reset  between  segments	(see  glLineStipple).	Line  attributes  such	as
		     GL_LINE_WIDTH  and  GL_LINE_SMOOTH  control  the  rasterization  of  the  lines.  Polygon rasterization attributes other than
		     GL_POLYGON_MODE have no effect.

       GL_FILL	     The interior of the polygon is filled.  Polygon attributes such as GL_POLYGON_STIPPLE and GL_POLYGON_SMOOTH control the  ras-
		     terization of the polygon.

EXAMPLES

       To draw a surface with filled back-facing polygons and outlined front-facing polygons, call glPolygonMode(GL_FRONT, GL_LINE);

NOTES

       Vertices  are  marked as boundary or nonboundary with an edge flag.  Edge flags are generated internally by the GL when it decomposes poly-
       gons; they can be set explicitly using glEdgeFlag.

ERRORS

       GL_INVALID_ENUM is generated if either face or mode is not an accepted value.

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

ASSOCIATED GETS

       glGet with argument GL_POLYGON_MODE

SEE ALSO

       glBegin(3G), glEdgeFlag(3G), glLineStipple(3G), glLineWidth(3G), glPointSize(3G), glPolygonStipple(3G)

																 GLPOLYGONMODE(3G)

Check Out this Related Man Page

GLSTENCILMASKSEPARAT(3G)					    OpenGL 3.3						  GLSTENCILMASKSEPARAT(3G)

NAME

       glStencilMaskSeparate - control the front and/or back writing of individual bits in the stencil planes

C SPECIFICATION

       void glStencilMaskSeparate(GLenum face, GLuint mask);

PARAMETERS

       face
	   Specifies whether the front and/or back stencil writemask is updated. Three symbolic constants are valid: GL_FRONT, GL_BACK, and
	   GL_FRONT_AND_BACK.

       mask
	   Specifies a bit mask to enable and disable writing of individual bits in the stencil planes. Initially, the mask is all 1's.

DESCRIPTION

       glStencilMaskSeparate controls the writing of individual bits in the stencil planes. The least significant n bits of mask, where n is the
       number of bits in the stencil buffer, specify a mask. Where a 1 appears in the mask, it's possible to write to the corresponding bit in the
       stencil buffer. Where a 0 appears, the corresponding bit is write-protected. Initially, all bits are enabled for writing.

       There can be two separate mask writemasks; one affects back-facing polygons, and the other affects front-facing polygons as well as other
       non-polygon primitives.	glStencilMask() sets both front and back stencil writemasks to the same values, as if glStencilMaskSeparate() were
       called with face set to GL_FRONT_AND_BACK.

ERRORS

       GL_INVALID_ENUM is generated if face is not one of the accepted tokens.

ASSOCIATED GETS

       glGet() with argument GL_STENCIL_WRITEMASK, GL_STENCIL_BACK_WRITEMASK, or GL_STENCIL_BITS

SEE ALSO

       glColorMask(), glDepthMask(), glStencilFunc(), glStencilFuncSeparate(), glStencilMask(), glStencilOp(), glStencilOpSeparate()

COPYRIGHT

       Copyright (C) 2006 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication
       License, v 1.0, 8 June 1999.  http://opencontent.org/openpub/.

OpenGL 3.3							    03/08/2011						  GLSTENCILMASKSEPARAT(3G)
Man Page