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GLLINESTIPPLE(3G)		 OpenGL Manual		     GLLINESTIPPLE(3G)

NAME
       glLineStipple - specify the line stipple pattern

C SPECIFICATION
       void glLineStipple(GLint factor, GLushort pattern);

PARAMETERS
       factor
	   Specifies a multiplier for each bit in the line stipple pattern. If
	   factor is 3, for example, each bit in the pattern is used three
	   times before the next bit in the pattern is used.  factor is
	   clamped to the range [1, 256] and defaults to 1.

       pattern
	   Specifies a 16-bit integer whose bit pattern determines which
	   fragments of a line will be drawn when the line is rasterized. Bit
	   zero is used first; the default pattern is all 1's.

DESCRIPTION
       Line stippling masks out certain fragments produced by rasterization;
       those fragments will not be drawn. The masking is achieved by using
       three parameters: the 16-bit line stipple pattern pattern, the repeat
       count factor, and an integer stipple counter s.

       Counter s is reset to 0 whenever glBegin() is called and before each
       line segment of a glBegin()(GL_LINES)/glEnd() sequence is generated. It
       is incremented after each fragment of a unit width aliased line segment
       is generated or after each i fragments of an i width line segment are
       generated. The i fragments associated with count s are masked out if

       pattern bit s factor % 16

       is 0, otherwise these fragments are sent to the frame buffer. Bit zero
       of pattern is the least significant bit.

       Antialiased lines are treated as a sequence of 1 × width rectangles for
       purposes of stippling. Whether rectangle s is rasterized or not depends
       on the fragment rule described for aliased lines, counting rectangles
       rather than groups of fragments.

       To enable and disable line stippling, call glEnable() and glDisable()
       with argument GL_LINE_STIPPLE. When enabled, the line stipple pattern
       is applied as described above. When disabled, it is as if the pattern
       were all 1's. Initially, line stippling is disabled.

ERRORS
       GL_INVALID_OPERATION is generated if glLineStipple is executed between
       the execution of glBegin() and the corresponding execution of glEnd().

ASSOCIATED GETS
       glGet() with argument GL_LINE_STIPPLE_PATTERN

       glGet() with argument GL_LINE_STIPPLE_REPEAT

       glIsEnabled() with argument GL_LINE_STIPPLE

SEE ALSO
       glLineWidth(), glPolygonStipple()

COPYRIGHT
       Copyright © 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/.

AUTHORS
       opengl.org

opengl.org			  03/16/2013		     GLLINESTIPPLE(3G)

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