glBlendColor : PyOpenGL 3.0.2 GL Man Pages

set the blend color

Signature

glBlendColor( GLfloat ( red ) , GLfloat ( green ) , GLfloat ( blue ) , GLfloat ( alpha ) )-> void

glBlendColor( red , green , blue , alpha )

Parameters

Variables	Description
red, green, blue, alpha	specify the components of GL_BLEND_COLOR

Description

The GL_BLEND_COLOR may be used to calculate the source and destination blending factors. The color components are clamped to the range

[0, 1]

before being stored. See glBlendFunc for a complete description of the blending operations. Initially the GL_BLEND_COLOR is set to (0, 0, 0, 0).

Notes

The type of the red , green , blue , and alpha parameters was changed from GLclampf to GLfloat. This change is transparent to user code and is described in detail on the removedTypes page.

Associated Gets

glGet with an argument of GL_BLEND_COLOR

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.

glBlendColor

Visvis utils/cropper.py Lines: 386

Visvis core/line.py Lines: 674, 724