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Environment Variables
=====================
This is a list of environment variables supported by osgEarth.
Caching:
:OSGEARTH_CACHE_PATH: Sets up a cache at the specified folder (path)
:OSGEARTH_CACHE_ONLY: Directs osgEarth to ONLY use the cache and no data sources (set to 1)
:OSGEARTH_NO_CACHE: Directs osgEarth to NEVER use the cache (set to 1)
:OSGEARTH_CACHE_DRIVER: Sets the name of the plugin to use for caching (default is "filesystem")
Threading/Performance:
:OSG_NUM_DATABASE_THREADS: Sets the total number of threads that the OSG DatabasePager
will use to load terrain tiles and feature data tiles.
:OSG_NUM_HTTP_DATABASE_THREADS: Sets the number of threads in the Pager's thread pool (see
above) that should be used for "high-latency" operations.
(Usually this means operations that do not read data from
the cache, or are expected to take more time than average.)
Debugging:
:OSGEARTH_NOTIFY_LEVEL: Similar to ``OSG_NOTIFY_LEVEL``, sets the verbosity for
console output. Values are ``DEBUG``, ``INFO``, ``NOTICE``,
and ``WARN``. Default is ``NOTICE``. (This is distinct from
OSG's notify level.)
:OSGEARTH_MP_PROFILE: Dumps verbose profiling and timing data about the terrain engine's
tile generator to the console. Set to 1 for detailed per-tile
timings; Set to 2 for average tile load time calculations
:OSGEARTH_MP_DEBUG: Draws tile bounding boxes and tilekey labels atop the map
:OSGEARTH_MERGE_SHADERS: Consolidate all shaders within a single shader program; this
is required for GLES (mobile devices) and is therefore useful
for testing. (set to 1).
:OSGEARTH_DUMP_SHADERS: Prints composed shader programs to the console (set to 1).
Rendering:
:OSGEARTH_DEFAULT_FONT: Name of the default font to use for text symbology
:OSGEARTH_MIN_STAR_MAGNITUDE: Smallest star magnitude to use in SkyNode
Networking:
:OSGEARTH_HTTP_DEBUG: Prints HTTP debugging messages (set to 1)
:OSGEARTH_HTTP_TIMEOUT: Sets an HTTP timeout (seconds)
:OSG_CURL_PROXY: Sets a proxy server for HTTP requests (string)
:OSG_CURL_PROXYPORT: Sets a proxy port for HTTP proxy server (integer)
:OSGEARTH_PROXYAUTH: Sets proxy authentication information (username:password)
:OSGEARTH_SIMULATE_HTTP_RESPONSE_CODE: Simulates HTTP errors (for debugging; set to HTTP response code)
Misc:
:OSGEARTH_USE_PBUFFER_TEST: Directs the osgEarth platform Capabilities analyzer to
create a PBUFFER-based graphics context for collecting
GL support information. (set to 1)
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