glscissor(3g) [xfree86 man page]

GLSCISSOR(3G)															     GLSCISSOR(3G)

NAME

       glScissor - define the scissor box

C SPECIFICATION

       void glScissor( GLint x,
		       GLint y,
		       GLsizei width,
		       GLsizei height )

PARAMETERS

       x, y Specify the lower left corner of the scissor box.  Initially (0, 0).

       width, height
	    Specify  the  width  and  height of the scissor box.  When a GL context is first attached to a window, width and height are set to the
	    dimensions of that window.

DESCRIPTION

       glScissor defines a rectangle, called the scissor box, in window coordinates.  The first two arguments, x and y,  specify  the  lower  left
       corner of the box.  width and height specify the width and height of the box.

       To  enable  and disable the scissor test, call glEnable and glDisable with argument GL_SCISSOR_TEST. The test is initially disabled.  While
       the test is enabled, only pixels that lie within the scissor box can be modified by drawing commands.  Window coordinates have integer val-
       ues  at	the shared corners of frame buffer pixels.  glScissor(0,0,1,1) allows modification of only the lower left pixel in the window, and
       glScissor(0,0,0,0) doesn't allow modification of any pixels in the window.

       When the scissor test is disabled, it is as though the scissor box includes the entire window.

ERRORS

       GL_INVALID_VALUE is generated if either width or height is negative.

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

ASSOCIATED GETS

       glGet with argument GL_SCISSOR_BOX
       glIsEnabled with argument GL_SCISSOR_TEST

SEE ALSO

       glEnable(3G), glViewport(3G)

																     GLSCISSOR(3G)

GLSCISSOR(3G)							   OpenGL Manual						     GLSCISSOR(3G)

NAME

       glScissor - define the scissor box

C SPECIFICATION

       void glScissor(GLint x, GLint y, GLsizei width, GLsizei height);

PARAMETERS

       x, y
	   Specify the lower left corner of the scissor box. Initially (0, 0).

       width, height
	   Specify the width and height of the scissor box. When a GL context is first attached to a window, width and height are set to the
	   dimensions of that window.

DESCRIPTION

       glScissor defines a rectangle, called the scissor box, in window coordinates. The first two arguments, x and y, specify the lower left
       corner of the box.  width and height specify the width and height of the box.

       To enable and disable the scissor test, call glEnable() and glDisable() with argument GL_SCISSOR_TEST. The test is initially disabled.
       While the test is enabled, only pixels that lie within the scissor box can be modified by drawing commands. Window coordinates have integer
       values at the shared corners of frame buffer pixels.  glScissor(0,0,1,1) allows modification of only the lower left pixel in the window,
       and glScissor(0,0,0,0) doesn't allow modification of any pixels in the window.

       When the scissor test is disabled, it is as though the scissor box includes the entire window.

ERRORS

       GL_INVALID_VALUE is generated if either width or height is negative.

ASSOCIATED GETS

       glGet() with argument GL_SCISSOR_BOX

       glIsEnabled() with argument GL_SCISSOR_TEST

SEE ALSO

       glEnable(), glViewport()

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/.

AUTHORS

       opengl.org

opengl.org							    06/10/2014							     GLSCISSOR(3G)