Gl.Viewport (gb.opengl)
Static Sub Viewport ( X As Integer, Y As Integer, Width As Integer, Height As Integer )
Set the viewport.
Parameters
- 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.
Description
Gl.Viewport specifies the affine transformation of
and
from
normalized device coordinates to window coordinates.
Let
be normalized device coordinates.
Then the window coordinates
are computed as follows:
Viewport width and height are silently clamped
to a range that depends on the implementation.
To query this range, call
Gl.Get with argument
Gl.MAX_VIEWPORT_DIMS.
Errors
Gl.INVALID_VALUE is generated if either
width or
height is negative.
Associated Gets
Gl.Get with argument Gl.VIEWPORT
Gl.Get with argument Gl.MAX_VIEWPORT_DIMS
See also
See original documentation on OpenGL website