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Author SHA1 Message Date
andy
df2b147ef5 Really simple command line airplane compiler. Basically a test program;
not integrated into the Makefile.am stuff.
2002-06-10 20:15:35 +00:00
andy
0cabedaa4f Use the density values from the environment subsystem, to properly handle
density variations due to humidity.
2002-06-10 08:47:29 +00:00
andy
2852f27bdc Uninitialized data problem. As it turns out, this never bit us because
the _chord member is only used uninitialized in circumstances where the
result is thrown away.  Still, bad practice.  Found with valgrind.
2002-06-04 07:23:34 +00:00
andy
04e083083d Need to call recalc() on the RigidBody during solution, or else it
won't apply the right gross weight due to fuel differences.

When solving for zero force, do so in the global frame, not the
aircraft's.  In principle, this shouldn't matter (zero is zero in all
frames), but in practice this should help to avoid oscillations.
Calculating lift as force perpendicular to the ground (and not the
wing plane) is clearly the Right Thing, anyway.

Also added support for a /yasim/gross-weight-lbs property, which
should be generically useful.
2002-06-01 19:59:38 +00:00
andy
713920356b Property name typo. This resulted in all temperatures being 273K,
which is far too warm at altitude.  Thus, air density (and aircraft
performance) was too low for a given altitude.
2002-05-30 18:54:08 +00:00
andy
7e63c0f6e8 Modify solution heuristics. Do the cruise AoA and tail incidence only
when the lift/drag are really solid.  And defer the approach trim until
the all four of the other variables are perfect.  I believe this should
fix the solution failures under gcc 2.95.2.
2002-05-29 08:41:13 +00:00
andy
adeeed1a0e Oops. Stray checkin. Revert. 2002-05-29 07:09:41 +00:00
andy
f324ea9bad The incidence setting only works on a compiled object. If setIncidence
is called on a non-compiled object, make sure to re-set it after compilation.
2002-05-29 07:07:29 +00:00
andy
040c508aa8 We don't handle propellers turning backwards. This got clamped
implicitly in PropEngine by disallowing negative torques, but that was
removed at some point.  We really need the explosion protection here
at the source.
2002-05-23 19:47:19 +00:00
andy
6af60f7462 Yank the "castering" attribute and replace it with a ControlMap-enabled
control that can be set via the property system.  This allows implementation
of the DC-3 wheel lock.
2002-05-23 19:30:56 +00:00
andy
4d10297732 Oops, left debug code in the checkin. 2002-05-21 18:45:56 +00:00
andy
4535c84b99 Solve for the elevator control input during approach. It turns out that
the downforce from the tail due to elevator trim is a significant contribution
to total lift.
2002-05-21 07:40:46 +00:00
curt
b1674cb506 From: "Jim Wilson" <jimw@kelcomaine.com>
This is a new improved patch for the previous tile manager fixes.

Rather than building dependencies between FGlocation or the viewer or fdm with
tilemgr what I ended up doing was linking the pieces together in the Mainloop
in main.cxx.  You'll see what I mean...it's been commented fairly well.  More
than likely we should move that chunk somewhere...just not sure where yet.

The changes seem clean now. As I get more ideas there could be some further
improvement in organizing the update in tilemgr.  You'll note that I left an
override in there for the tilemgr::update() function to preserve earlier
functionality if someone needs it (e.g. usage independent of an fdm or
viewer), not to mention there are a few places in flightgear that call it
directly that have not been changed to the new interface (and may not need to be).

The code has been optimized to avoid duplicate traversals and seems to run
generally quite well.  Note that there can be a short delay reloading tiles
that have been dropped from static views.  We could call the tile scheduler on
a view switch, but it's not a big deal and at the moment I'd like to get this
in so people can try it and comment on it as it is.

Everything has been resycned with CVS tonight and I've included the
description submitted earlier (below).

Best,

Jim

Changes synced with CVS approx 20:30EDT 2002-05-09 (after this evenings updates).

Files:
http://www.spiderbark.com/fgfs/viewer-update-20020516.tar.gz
 or
http://www.spiderbark.com/fgfs/viewer-update-20020516.diffs.gz

Description:
In a nutshell, these patches begin to take what was one value for ground
elevation and calculate ground elevation values seperately for the FDM and the
viewer (eye position).  Several outstanding view related bugs have been fixed.

With the introduction of the new viewer code a lot of that Flight Gear code
broke related to use of a global variable called "scenery.cur_elev".

Therefore the ground_elevation and other associated items (like the current
tile bucket) is maintained per FDM instance and per View.  Each of these has a
"point" or location that can be identified.  See changes to FGLocation class
and main.cxx.

Most of the problems related to the new viewer in terms of sky, ground and
runway lights, and tower views are fixed.

There are four minor problems remaining.  1) The sun/moon spins when you pan
the "lookat" tower view only (view #3).  2) Under stress (esp. magic carpet
full speed with max visibility), there is a memory leak in the tile caching
that was not introduced with these changes.  3) I have not tested these
changes or made corrections to the ADA or External FDM interfaces.  4) The
change view function doesn't call the time/light update (not a problem unless
a tower is very far away).

Details:
FDM/flight.cxx, flight.hxx - FGInterface ties to FGAircraftModel so that it's
 location data can be accessed for runway (ground elevation under aircraft)
 elevation.

FDM/larsim.cxx, larcsim.hxx - gets runway elevation from FGInterface now.
Commented out function that is causing a namespace conflict, hasn't been
called with recent code anyway.

FDM/JSBSim/JSBSim.cxx, YASim/YASim.cxx - gets runway elevation from
FGInterface now.

Scenery/newcache.cxx, newcache.hxx - changed caching scheme to time based
(oldest tiles discard).

Scenery/tileentry.cxx, tileentry.hxx - added place to record time, changed
rendering to reference viewer altitude in order to fix a problem with ground
and runway lights.

Scenery/tilemgr.cxx, tilemgr.hxx - Modified update() to accept values for
multiple locations.   Refresh function added in  order to periodically make
the tiles current for a non-moving view (like a tower).

Main/fg_init.cxx - register event for making tiles current in a non-moving
view (like a tower).

Main/location.hxx - added support for current ground elevation data.

Main/main.cxx - added second tilemgr call for fdm, fixed places where viewer
position data was required for correct sky rendering.

Main/options.cxx - fixed segfault reported by Curtis when using --view-offset
command line parameter.

Main/viewer.cxx, viewer.hxx - removed fudging of view position. Fixed numerous
bugs that were causing eye and target values to get mixed up.
2002-05-17 17:25:28 +00:00
andy
4efbc97a4b Revert the recent changes to Atmosphere.cpp. They were actually in
the wrong place.  The Atmosphere::getStd*() calls are used by the
solver, and thus really need to return values for a "standard"
atmosphere.  Otherwise, an aircraft started up in Moscow will behave
differently than one initialized in Cairo. :)

The place where environmental pressure and temperature get inspected
at runtime is in YASim.cxx.  The changes there, happily, end up being
even smaller than the ones to Atmosphere.  This ends up replacing code
only, and removing some comments.
2002-05-16 07:49:22 +00:00
david
52c1cb2f7d Take the static temperature, static pressure, and density values from
an external source if requested by the
/environment/params/control-fdm-atmosphere property.
2002-05-15 12:10:48 +00:00
curt
47825dcbae Moved "scenery" from being declaried in scenery.cxx to being declared
in globals.hxx.
2002-05-14 05:22:52 +00:00
david
5a849b66e8 Major overhaul:
- changed FGSubsystem::update(int) to
  FGSubsystem::update(delta_time_sec); the argument is now delta time
  in seconds rather than milliseconds

- added FGSubsystem::suspend(), FGSubsystem::suspend(bool),
  FGSubsystem::resume(), and FGSubsystem::is_suspended(), all with
  default implementations; is_suspended takes account of the master
  freeze as well as the subsystem's individual suspended state

- the FDMs now use the delta time argument the same as the rest of
  FlightGear; formerly, main.cxx made a special case and passed a
  multiloop argument

- FDMs now calculate multiloop internally instead of relying on
  main.cxx

There are probably some problems -- I've done basic testing with the
major FDMs and subsystems, but we'll probably need a few weeks to
sniff out bugs.
2002-05-11 16:28:50 +00:00
david
56473dc28d Mac OS X fixes and MSVC warning fixes from Jonathan Polley. 2002-05-10 23:35:06 +00:00
andy
7a9e2aba71 Fix dumb typo. Very embarassing, but oddly not fatal... 2002-05-01 01:17:33 +00:00
andy
4a2f192fb1 Change the idle MP to reduce idle power a bit. This is basically a
hack, and should be replaced with a sane idle model that has some
physical justification.
2002-04-09 04:55:16 +00:00
david
e78a4d3727 Commented out code setting view position offsets until we sort out
what is what.
2002-04-04 01:04:09 +00:00
andy
e45cb5d0aa Found by inspection a bug in the generation of orientation matrices
for fuselage Surface objects.  If the fuselage wasn't aligned perpendicular
to the Y axis, the matrix wouldn't be orthonormal.  Since all of, perhaps,
three aircraft have ever been built this way, it's doubtful I would have
found this as a bug report. :)
2002-03-21 03:35:52 +00:00
andy
47b2307356 Oops, "one third from the edge" means "one SIXTH from the center". 2002-03-19 00:02:18 +00:00
andy
b933406818 Print an error message before terminating on parse errors. 2002-03-15 19:02:07 +00:00
andy
b9d1cad6f2 Export the gear compression to the property tree. 2002-03-04 07:57:43 +00:00
andy
ab381e5c01 Added a property output feature to ControlMap that allows arbitrary binding
and scaling of control values to properties.  Also added a time interpolation
feature that replaces the hacked-in "retract-time" feature for the gear in
a more general way (applicable to flaps, too!).  Incompatibly breaks
the XML syntax; get new files!
2002-03-01 06:47:28 +00:00
andy
5faea1c494 Wrong sense in the pilot acceleration coordinates (or maybe it's a panel
bug?  I'm not sure what points where anymore).
2002-02-27 08:24:37 +00:00
andy
df9069a224 Added a post-solver "initEngines()" call to return the engines to a sane
initial state.  No more starting up at cruise RPM.
2002-02-27 00:41:57 +00:00
andy
d3cca375dc Basically complete support for piston engine startup, including power loss
due to single-magneto operation.  Seems to work.
2002-02-27 00:18:57 +00:00
andy
2f00a7970c Minor mixup. Engines that are off have a manifold pressure equal to
ambient, not to _rho0, which is the air density of the "calibration
environment" (typically sea level).
2002-02-20 07:15:12 +00:00
andy
764eb2a2e7 Automatically generate "contact" points for collision detection. Implemented
as extra (and invisible) gear objects.
2002-02-20 07:12:27 +00:00
andy
6b10d8b128 Scaling "idle" MP to 6 inches or so is all well and good, but not if
the engine continues to develop 20% power.  Rescale the output power
accordingly, so idling aircraft stay put.
2002-02-20 07:10:58 +00:00
andy
3f35de9507 Forgot to include the wind when computing airspeed. Big oops. 2002-02-20 07:09:21 +00:00
andy
4edfa14137 Support a "skid" property for non-rolling gear objects like tail skids. 2002-02-20 07:08:33 +00:00
david
ad79ee4897 Added minimal support for magnetos, so that engines can be shut off.
The starter isn't working yet, so the engine just springs to life.
2002-02-20 04:27:22 +00:00
david
b4a9d76215 Fixed runway-altitude problem that prevented starts at airports higher
than sea-level.
2002-02-20 00:20:13 +00:00
david
3b870192f4 First steps in a weather reorganization. Note especially that
properties have been renamed from wind-(north|east|down)-fps to
wind-from-(north|east|down)-fps, and the FDMs modified appropriately.
No other changes should be visible unless FG_OLD_WEATHER is defined.
2002-02-19 01:26:44 +00:00
david
93c69c4bc3 Changes from Tony Peden to fix reinit crashes (and eliminate the force
altitude function).
2002-02-17 21:05:27 +00:00
curt
4f67824f09 - Removed redundant FG*:: qualifications from class members
- Fixed comparisons between signed and unsigned ints
2002-02-15 22:00:49 +00:00
curt
ca3d6fac8f Added .hpp files to Makefile.am so they will be automatically included
in the tarball distributions.
2002-02-12 23:44:15 +00:00
david
80b4567d54 Removed FGEngInterface and FGGearInterface after consultation with
FDM people.  FlightGear now supports an unlimited number of fuel
tanks.  Also added correct fuel-flow reporting for piston engines, and
tracked new features in SimGear property support.
2002-01-19 05:34:03 +00:00
curt
1fa4c88d0e Updates to build system to better support automake-1.5
- automake-1.4 sets default values for INCLUDES which we can't
  overwrite.
- automake-1.5 renames this to DEFAULT_INCLUDES and leaves INCLUDES
  open for the developer to use.

Thus for automake-1.4 we are forced to 'append' to INCLUDES and in
automake-1.5 we can just set the value to whatever we like.
Unfortunately, the behaviors of the two versions are mutually
incompatible.

The solution I am committing now works for both versions but
automake-1.5 generates a lot of spurious warning messages that are
annoying, but not fatal.
2001-12-28 22:29:59 +00:00
david
be7cc1058a Patch from Andy to fix propellers on DC-3. 2001-12-24 20:34:53 +00:00
david
f0e6716953 Latest YASim changes. 2001-12-24 13:54:03 +00:00
david
aabdd355f0 Modified FGSubsystem::update() to take an int parameter for delta time
(i.e. multiloop).  Most subsystems currently ignore the parameter, but
eventually, it will allow all subsystems to update by time rather than
by framerate.
2001-12-22 17:33:27 +00:00
david
7abad40151 Fixed to look for easyxml.hxx in the simgear/xml rather than simgear/. 2001-12-16 22:00:35 +00:00
david
4f5d70144a -Removed .cvsignore from itself, since .cvsignore is now in the CVS 2001-12-12 04:15:23 +00:00
curt
9f73588b31 YASim-0.1.3 updates. 2001-12-10 23:13:54 +00:00
curt
4cc5cee885 David Megginson writes:
Here's an unusual patch for FlightGear -- I've created .cvsignore
files for every source directory, to make CVS output more informative.
This is especially nice when using cvs-examine from (X)Emacs to look
for changes.
2001-12-09 05:43:40 +00:00
curt
e27a88756c Changes from Norman Vine that 'almost' get 'reset' and 'goto apt' working.
Note there is still a problem when doing a 'reset' after doing
a 'goto'.   Curt says: I also see that doing two subsequent reset's on a
JSBSim model results in a segfault in a deconstructor deep inside JSBSim.
2001-12-07 22:38:19 +00:00
curt
48260480b3 Updated to YASim-0.1.2 2001-12-07 20:00:59 +00:00
curt
f716539390 Change default search directory for YASim aircraft to $FG_ROOT/Aircraft-yasim
with corresponding changes to the base tree cvs.
2001-12-06 20:16:03 +00:00
curt
e08d4359cd Tweaks to fix directory change. 2001-12-06 18:16:22 +00:00
curt
4c422bbe6d Updated to YASim-0.1.1 2001-12-06 18:13:24 +00:00
curt
5b84ae51a5 Initial revision of Andy Ross's YASim code. This is (Y)et (A)nother Flight
Dynamics (Sim)ulator.  Basically, this is a rough, first cut of a "different
take" on FDM design.  It's intended to be very simple to use,
producing reasonable results for aircraft of all sorts and sizes,
while maintaining simulation plausibility even in odd flight
conditions like spins and aerobatics.  It's at the point now where one
can actually fly the planes around.
2001-12-01 06:22:24 +00:00