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glViewport.3gl
Langue: en
Version: 95779 (fedora - 25/11/07)
Section: 3 (Bibliothèques de fonctions)
NAME
glViewport - set the viewportC SPECIFICATION
void glViewport( GLint x,GLint y, GLsizei width, GLsizei height )
delim $$
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
glViewport specifies the affine transformation of $x$ and $y$ from normalized device coordinates to window coordinates. Let ($x sub nd$, $y sub nd$) be normalized device coordinates. Then the window coordinates ($x sub w$, $y sub w$) are computed as follows: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_VIEWPORTglGet with argument GL_MAX_VIEWPORT_DIMS
SEE ALSO
glDepthRange(3G)Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre