glViewport : PyOpenGL 3.0.2 GL Man Pages

set the viewport

Signature

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

glViewport( x , y , width , height )

Parameters

Variables	Description
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_{nd}, y_{nd})

be normalized device coordinates. Then the window coordinates

(x_{w}, y_{w})

are computed as follows:

x_{w} = (x_{nd} + 1) (\frac{width}{2}) + x

y_{w} = (y_{nd} + 1) (\frac{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.

Associated Gets

glGet with argument GL_VIEWPORT

glGet with argument GL_MAX_VIEWPORT_DIMS

Copyright

1991-2006 Silicon Graphics, Inc. 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.

glViewport

OpenGLContext tests/shadow_2.py Lines: 134

OpenGLContext tests/shadow_1.py Lines: 549

OpenGLContext OpenGLContext/context.py Lines: 626

OpenGL-Demo PyOpenGL-Demo/redbook/smooth.py Lines: 86

OpenGL-Demo PyOpenGL-Demo/redbook/double.py Lines: 89

OpenGL-Demo PyOpenGL-Demo/redbook/movelight.py Lines: 112

OpenGL-Demo PyOpenGL-Demo/redbook/fog.py Lines: 116

OpenGL-Demo PyOpenGL-Demo/redbook/cube.py Lines: 77

OpenGL-Demo PyOpenGL-Demo/redbook/teapots.py Lines: 181

OpenGL-Demo PyOpenGL-Demo/redbook/lines.py Lines: 121

OpenGL-Demo PyOpenGL-Demo/redbook/drawf.py Lines: 91

OpenGL-Demo PyOpenGL-Demo/redbook/scene.py Lines: 108

OpenGL-Demo PyOpenGL-Demo/da/dots.py Lines: 93

OpenGL-Demo PyOpenGL-Demo/GLUT/gluttimerfunc_testCase.py Lines: 50

OpenGL-Demo PyOpenGL-Demo/GLUT/shader_test.py Lines: 72

OpenGL-Demo PyOpenGL-Demo/GLUT/gears.py Lines: 206

OpenGL-Demo PyOpenGL-Demo/GLUT/tom/conechecker.py Lines: 35, 39, 41

OpenGL-Demo PyOpenGL-Demo/proesch/stereo/stereoDemo.py Lines: 54

OpenGL-Demo PyOpenGL-Demo/NeHe/lesson5.py Lines: 80

OpenGL-Demo PyOpenGL-Demo/NeHe/lesson45.py Lines: 374

OpenGL-Demo PyOpenGL-Demo/NeHe/lesson18.py Lines: 133

OpenGL-Demo PyOpenGL-Demo/NeHe/lesson4.py Lines: 77

OpenGL-Demo PyOpenGL-Demo/NeHe/lesson12.py Lines: 58

OpenGL-Demo PyOpenGL-Demo/NeHe/lesson26.py Lines: 83

OpenGL-Demo PyOpenGL-Demo/NeHe/lesson41.py Lines: 206

OpenGL-Demo PyOpenGL-Demo/NeHe/lesson13.py Lines: 131

OpenGL-Demo PyOpenGL-Demo/NeHe/lesson2.py Lines: 67

OpenGL-Demo PyOpenGL-Demo/NeHe/lesson11.py Lines: 62

OpenGL-Demo PyOpenGL-Demo/NeHe/lesson19.py Lines: 129

OpenGL-Demo PyOpenGL-Demo/NeHe/lesson1.py Lines: 67

OpenGL-Demo PyOpenGL-Demo/NeHe/lesson3.py Lines: 67

OpenGL-Demo PyOpenGL-Demo/NeHe/lesson23.py Lines: 82

OpenGL-Demo PyOpenGL-Demo/NeHe/lesson6.py Lines: 102

OpenGL-Demo PyOpenGL-Demo/NeHe/lesson16.py Lines: 67

OpenGL-Demo PyOpenGL-Demo/NeHe/lesson42.py Lines: 272, 280, 288, 296, 363

OpenGL-Demo PyOpenGL-Demo/NeHe/lesson6-multi.py Lines: 136

OpenGL-Demo PyOpenGL-Demo/NeHe/lesson43/lesson43.py Lines: 86

OpenGL-Demo PyOpenGL-Demo/NeHe/lesson44/lesson44.py Lines: 214

OpenGL-Demo PyOpenGL-Demo/NeHe/lesson48/NeHeGL.py Lines: 91

Glinter Widget.py Lines: 53, 583, 661

{Artistic License} PymmLib applications/glutviewer.py Lines: 160

{Artistic License} PymmLib mmLib/OpenGLDriver.py Lines: 135

pyBzEdit pyBzEdit.py Lines: 417, 758

{LGPL} PyUI pyui/renderers/openglGlut.py Lines: 229

{LGPL} PyUI2 system/glutdevice.py Lines: 170

{LGPL} PyUI2 renderers/openglGlut.py Lines: 229

{LGPL} VisionEgg VisionEgg/Core.py Lines: 1351

{LGPL} PyMT examples/apps/3Dviewer/3Dviewer.py Lines: 38

{LGPL} PyMT pymt/ui/window/__init__.py Lines: 19, 451

{LGPL} PyMT pymt/graphx/fbo.py Lines: 20, 224, 261

{GPL} GLChess src/lib/scene/opengl/opengl.py Lines: 311

{LGPL} Pyggel pyggel/data.py Lines: 550, 612

{LGPL} Pyggel pyggel/view.py Lines: 301

{GPL} Scocca scocca/graphics/opengl/viewport.py Lines: 22

{LGPL or GPL or MPL} Kamaelia Sketches/CL/Topology3D/Experiments/Spheres.py Lines: 19

{LGPL or GPL or MPL} Kamaelia Sketches/CL/Topology3D/Experiments/Cubes.py Lines: 35

Gloopy gloopy/view/projection.py Lines: 27

OpenGL Tutorial (Python Translation) t02.playing-with-colors/FragPosition.py Lines: 98

OpenGL Tutorial (Python Translation) t02.playing-with-colors/VertexColors.py Lines: 104

OpenGL Tutorial (Python Translation) t01.hello-triangle/HelloTriangle.py Lines: 115

Visvis core/baseFigure.py Lines: 864

Visvis core/axes.py Lines: 820, 825, 868, 933