Signature
Parameters
| Variables | Description |
|---|---|
| x, y |
Specify the lower left corner of the scissor box.
Initially (0, 0).
|
| width, height |
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
Associated Gets
glGet
with argument
GL_SCISSOR_BOX
glIsEnabled
with argument
GL_SCISSOR_TEST
Version Support
| glScissor |
See Also
Copyright
Copyright
1991-2006 Silicon Graphics, Inc.
Copyright
2010-2014 Khronos Group.
This document is licensed under the SGI Free Software B License.
For details, see
http://oss.sgi.com/projects/FreeB/
.
Sample Code References
The following code samples have been found which appear to reference the functions described here. Take care that the code may be old, broken or not even use PyOpenGL.
glScissor