Fixed ugly sim-reset issue: Persistent properties (USERARCHIVE attribute)
are retained across sim sessions (when restarting the sim). So they should
also be retained on sim-resets (without the need to first exit/restart
the sim to make them really persistent).
Also, avoid warning due to read-only properties.
Seems the hack was necessary for the pre-OSG display only. Or the feature
is broken since OSG port altogether. But it caused issues for 3D and 2D
cockpits when /sim/virtual-cockpit wasn't enabled. => Removing for now.
Original property-rules in keyboard.xml toggled master and clock freeze
independently - which caused issues when only one property was true. New
command toggles both properties consistently.
This reverts commit b36b33f716.
See #316: Caused issues with sky becoming black in dense fog.
Also: when the fog issue is solved, we could configure the constant
(black) clear color once only (during init), no need to do it in every
loop. Also, entire "if (skyblend) { ... } else {..}" was redundant,
since "if" and "else" clauses were all identical - and the "clearColor"
variables were unused. => Once the fog issue is solved, we can easily
improve the clearColor configuration here.
This class and their source files visual_enviro.[h|c]xx were
unused since OSG transition. It's only functionality was to
keep a variable for the enable-state of rendering of precipitation.
This has now been moved to SGPrecipitation.
This patch also removes all references to this class and
visual_enviro.hxx. Wxradar needs a new implementation for cloud
echoes which probably should be part of fgclouds.
See also SimGear commit 4e6159aa07f2817c09fad72db64d713e47f6f3da
New module contributed: AV400WSim.
Supports communication with external (aka real) Garmin 400/500 WAAS flight
sim units. Includes changes to options.cxx and fg_io.cxx to support
invoking and configuring the new module.
New "auto-position" switch to always use closest tower for tower-view.
Exposes new "/sim/airport/closest-airport-id" property.
Display closest airport on groundradar by default.
Untieing needs to be done prior to the destruction of the object which
aggregated the TiedPropertyList. So the TiedPropertyLists destructor can't
untie the properties automatically (and it doesn't). So, do some manual
clean-up.
When looking _at_ a model with an x,y offset of 0,
then the view heading has no effect. So, force heading offset property
to 0 to keep other property consumers from running incorrect calculations.
=> Trying to rotate the heading offset in Tower/Chase view no longer
rotates the blue sky around the aircraft, though the viewer itself
isn't rotating anything.
