HP sv6 - Manual (Page 84)

installation and user information
optimization
Chapter 2 84
gamma value
Another way to fine-tune the image quality is to adjust the gamma
correction. Specify the default values to be used for 3D gamma
correction. using the instructions in the
/opt/graphics/OpenGL/sv/doc/README.gamma file.
HPOGL_PUSH _ENVIRONMENT
To override the default environment specified in the SlaveEnvironment
section of the
/etc/X11/X0screens file, have the application startup
script set HPOGL_PUSH_ENVIRONMENT.
By setting HPOGL_PUSH_ENVIRONMENT, all HPOGL* environment
variables are passed across to the slave nodes. With this mechanism,
each application can have its own individual environment. In the
absence of HPOGL_PUSH_ENVIRONMENT, slave environments
default to X0screens settings at the time that the Xserver was started.
As an example, assume X0screens has:
SlaveEnvironment
HPOGL_FORCE_SCENEAA=1
HPOGL_LIGHTING_SPACE=EC
Application abc’s startup script contains:
export HPOGL_BOUNDING_VOLUME_ENABLE=1
export HPOGL_BOUNDING_VOLUME_GLOBAL=1
export HPOGL_BVOL_MIN_VERTS=5
export HPOGL_BVOL_MAX_VERTS=10
export HPOGL_PUSH_ENVIRONMENT=1
/opt/apps/abc
For this example, application abc will run with the four variables set in
its environment and WILL NOT have HPOGL_FORCE_SCENEAA or
HPOGL_LIGHTING_SPACE=EC set.
Any other application that is run without
HPOGL_PUSH_ENVIRONMENT will have only the X0screens values.