GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages
GLVIEWPORT() GLVIEWPORT()

glViewport - set the viewport

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

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

glViewport specifies the affine transformation of x and y from normalized device coordinates to window coordinates. Let ( xnd , ynd ) be normalized device coordinates. Then the window coordinates ( xw , yw ) are computed as follows:


xw=(xnd+1)width2+x


yw=(ynd+1)height2+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.

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.

glGet with argument GL_VIEWPORT
glGet with argument GL_MAX_VIEWPORT_DIMS

glDepthRange

Search for    or go to Top of page |  Section other |  Main Index

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with ManDoc.