Man page or keyword search:   man All Sections 1 - General Commands 2 - System Calls 3 - Subroutines, Functions 4 - Special Files 5 - File Formats 6 - Games and Screensavers 7 - Macros and Conventions 8 - Maintenence Commands 9 - Kernel Interface New Commands Server 4.4BSD AIX Alpinelinux Archlinux Aros BSDOS BSDi Bifrost CentOS Cygwin Darwin Debian DigitalUNIX DragonFly ElementaryOS Fedora FreeBSD Gentoo GhostBSD HP-UX Haiku Hurd IRIX Inferno JazzOS Kali Knoppix LinuxMint MacOSX Mageia Mandriva Manjaro Minix MirBSD NeXTSTEP NetBSD OPENSTEP OSF1 OpenBSD OpenDarwin OpenIndiana OpenMandriva OpenServer OpenSuSE OpenVMS Oracle PC-BSD Peanut Pidora Plan9 QNX Raspbian RedHat Scientific Slackware SmartOS Solaris SuSE SunOS Syllable Tru64 UNIXv7 Ubuntu Ultrix UnixWare Xenix YellowDog aLinux   12896 pages apropos Keyword Search (all sections) Output format html ascii pdf view pdf save postscript

glViewport(3G)							glViewport(3G)

NAME
       glViewport - set the viewport

SYNOPSIS
       void glViewport(
	       GLint x,
	       GLint y,
	       GLsizei width,
	       GLsizei height );

PARAMETERS
       Specify	the  lower  left  corner of the viewport rectangle, in pixels.
       The initial value is (0,0).  Specify the width and height of the	 view‐
       port. When a GL context is first attached to a window, width and height
       are set to the dimensions of that window.

DESCRIPTION
       glViewport() specifies the affine transformation of x and y  from  nor‐
       malized device coordinates to window coordinates. Let (x[n]d, y[n]d) be
       normalized device coordinates. Then the window coordinates (x[w], y[w])
       are computed as follows: x[w] = (x[nd] + 1) width/2 + x y[w] = (y[nd] +
       1) height/2 + y

       Viewport width and height are silently clamped to a range that  depends
       on  the implementation. To query this range, call glGet() with argument
       GL_MAX_VIEWPORT_DIMS.

ERRORS
       GL_INVALID_VALUE is generated if either width or height is negative.

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

ASSOCIATED GETS
       glGet() with argument GL_VIEWPORT
       glGet() with argument GL_MAX_VIEWPORT_DIMS

SEE ALSO
       glDepthRange(3)

								glViewport(3G)

Vote for polarhome