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Author SHA1 Message Date
ehofman
174852f01e Try to prevent z-buffer problems for video cards with a 16-bit depth buffer 2003-09-16 14:31:14 +00:00
ehofman
44fda9805b Enable back face culling for cockpit instruments, disable depth buffer writes for 2d instruments but enable depth buffer writes for the magnetic compass. Does anyone care to create a 3d magnetic compass? 2003-09-16 10:02:32 +00:00
ehofman
a5bd132143 Make sure the joystick name gets printed 2003-09-16 08:25:16 +00:00
curt
9bb782ce72 Added a command line option to specify a starting time of day in the sense of:
--timeofday=dawn
  --timeofday=dusk
  --timeofday=noon
  --timeofday=midnight
2003-09-15 22:55:39 +00:00
ehofman
13d8e0edab Allow -jsbsim, -yasim or -uiuc in the name of the configuration file when it resides in it's own subdirectory 2003-09-15 16:00:18 +00:00
ehofman
4d6b14a08c Add support for loading aircraft which have the configuration file inside it's own subdirectory 2003-09-15 14:21:16 +00:00
ehofman
b7e3f95300 Add support for <aircraft>-set.xml configuration files inside it's own subdirectory. This applies only to the --show-aircraft option for now. 2003-09-15 14:07:50 +00:00
ehofman
7249aaea33 Frederic Bouvier:
This patch is there to correct a problem that prevent to load static objects when specifying a relative fg-root or a different, relative, fg-scenery. It appears that there is a mix between fg-root, fg-scenery and PLIB's model-dir.
It has been reported on the list that users are not able to see the buildings, especially those running the win32 builds because they run 'runfgfs.bat' that set FG_ROOT=./DATA.

I decided not to use model-dir because it just add confusion and to build a valid path earlier.
2003-09-13 11:47:30 +00:00
ehofman
2be37c04fe Enable two sided lighting calculations when specular highlight is enabled 2003-09-13 09:27:50 +00:00
ehofman
dd963990dc Turn back to default lighting when specular-highlight gets disabled 2003-09-12 22:09:54 +00:00
ehofman
9812739a71 Add the posibillity to disable specular highlight because it looks like some implementations switch over to sofware rendering when this is enabled 2003-09-12 21:43:01 +00:00
ehofman
774faa157d Make it possible for textured object to change color to white when lit by a strong light source. This might affect rendering time a bit 2003-09-12 09:27:19 +00:00
curt
5705ad715b Changes to facilitate replaying the last "n" seconds. 2003-09-11 19:36:04 +00:00
david
72be3f287a Added --failure option. 2003-09-10 01:29:19 +00:00
daveluff
d3b7c2ac10 Fix a couple of bugs that resulted in ATIS not being heard at airports with AI traffic active 2003-09-05 13:58:51 +00:00
daveluff
b898c5e4ff Change the start of descent point of the AI plane when the circuit has been extended when following previous traffic - it should not land short now, although it can land a way down the runway if start of descent should occur during a turn, since it doesnt start descending until the turn is finished 2003-09-05 10:26:11 +00:00
daveluff
be274df23b Guard against update(...) getting called before init(...) 2003-09-05 10:23:20 +00:00
daveluff
1520fd648e Output a few properties for AI code devel convienience - probably temporary 2003-09-05 10:22:18 +00:00
daveluff
3f162abf09 Whitespace cleanup 2003-09-05 10:21:29 +00:00
ehofman
3e98bccbaf Remove unused gamma corrections 2003-09-03 18:47:48 +00:00
ehofman
ffd64f7a8c Fix a reset bug for at least JSBSim by removing some apperently old UIUC code. This falls in the same category as the code from main.cxx which was recently removed by advice from the UIUC developers. 2003-09-03 17:10:52 +00:00
curt
c81fbb937a David Luff:
Firstly, the search of a given runway number was coming out wrong if the
reverse of the one actually in the database was given, resulting in the AI
plane going to the wrong runway.  This was caused by the fact that if the
reverse runway number to the one wanted was matched then revrwyno was
assigned to rwy.rwy_no, whereas actually it was the original runwayno that
should have been assigned.

Secondly, whilst instrumenting the search with couts to see what was going
wrong, I noticed that one runway would come up loads of times.  It turns
out that this is because taxiways and the next airport line were loaded in
as the last runway, with only the type changed, in the constructor.  Thus
the total number of runway entries for all except the last airport equalled
(no-of-runways + no-of-taxiways +  1).  I've changed a couple of lines to
fix this.

[Curt: this was partially fixed last week, but now it should be completely
fixed.  Thanks Dave!]
2003-09-02 19:12:11 +00:00
david
2ce5cbf854 Add a --ceiling=FT_AGL[:THICKNESS_AGL] option to create a default
overcast ceiling at the given altitude AGL, optionally with the given
thickness (or default to 2000 ft).
2003-09-01 22:58:19 +00:00
david
fccea06ed3 Roll out last change for now. It kills the mag compass on the default
172, and seems to have unpredictable results depending on the drawing
order.
2003-09-01 22:03:46 +00:00
ehofman
7a29fc0613 Average sunlight and ambient light instead of multiplying it 2003-08-29 22:13:05 +00:00
curt
27a36e6059 - The latest volley in the FlightGear lighting wars.
- Ambient is based off the lookup table only.
- Diffuse is based off of the lookup table, but multiplied by a combination
  of sun/fog colors.

The result is a bit more ambient light at dusk and night since the world is
never 100% dark.  And we still get nice sunset/sunrise colored illumination
of surfaces that are directly illuminated by the sun.
2003-08-29 21:24:13 +00:00
curt
1cbcd89e5e I had to make a small mod to the runways.dat format, code changes to handle
that.
2003-08-29 20:27:48 +00:00
ehofman
1dea70fffa Use the glPointParameter function pointer rather than the function itself 2003-08-29 16:50:20 +00:00
ehofman
82ba3ebbde Remove a possible glut dependency and do some code cleaning 2003-08-29 16:46:21 +00:00
ehofman
3ba01fa762 New automake, new problems. Add $base_LIBS for programs since $LIBS isn't substituted automatically anymore 2003-08-29 09:03:49 +00:00
curt
ff2740f085 Remove the last traces of metakit (hopefully) :-) 2003-08-29 04:42:43 +00:00
curt
314c324556 Depricated ... 2003-08-29 04:12:34 +00:00
curt
e6859e4fe0 Redo the runway database scheme to use a flat/ascii file and load the entire
database into memory at the start.  This should completely eliminate any
dependencies we have on metakit.
2003-08-29 04:11:23 +00:00
curt
f0ddd9048f Fix a small oops on my part. 2003-08-28 21:05:01 +00:00
curt
212f5d66bf Depricated ... 2003-08-28 21:04:12 +00:00
curt
6665d7d609 Remove one dependence on MetaKit. 2003-08-28 20:53:08 +00:00
curt
b23183f018 Put the id of the tile we are flying over into the property tree for
convenience of debugging.
2003-08-28 20:52:34 +00:00
curt
c86c81dad0 Minor tweak. 2003-08-28 20:52:05 +00:00
ehofman
69d0052375 Fix an undeclared function refference in one of the supported compiler environments 2003-08-25 12:41:40 +00:00
ehofman
ced6b4f520 Updates needed for z-ordewring of the cloud layers 2003-08-22 08:05:00 +00:00
ehofman
6f8aa7b331 Change GLUT_H to FG_GLUT_H to prevent a naming clash with freeglut. 2003-08-21 09:12:12 +00:00
ehofman
32cb0df98e Add support for moving cloud layers 2003-08-19 13:06:51 +00:00
ehofman
fb3717003e Fix some network layer issues. Some htonl() calls didn't use the return value. 2003-08-18 11:11:08 +00:00
ehofman
c745a8f956 Add a comment on how to enable an alternative HOT algorithm that enables one to fly underneath static objects 2003-08-18 09:34:12 +00:00
ehofman
a3fb470f7c Fix a bug where a test was perfromed on a variable that wasn;'t even initialized (and wrong) and add support for tab and space as a seperator 2003-08-18 09:26:26 +00:00
ehofman
0caaeffbc6 Some small (linux) fixes 2003-08-17 10:03:36 +00:00
ehofman
5ae096b225 Reorganization of main.cxx 2003-08-17 09:54:41 +00:00
ehofman
830ce9108c Disable depth buffer writes for 2D insturments. This should prevent z-buffer fighting 2003-08-16 11:35:04 +00:00
ehofman
be863ee240 Work around a problem in certain NVidia adapters hat don't support fgPushAttrib(FG_FOG_BIT) 2003-08-15 17:47:34 +00:00
curt
0179cab894 Norman Vine:
Attached patch gets rid of all mention of GLUT from the cockpit directory.
2003-08-12 15:57:17 +00:00
curt
bcb10efa50 Remove several unneeded glut dependencies. Note, this doesn't signal an
immediate end to glut, only that I'm going through and cleaning up (and
taking inventory of the actual glut dependencies in case I want to investigate
SDL.)
2003-08-11 21:50:22 +00:00
curt
80e98bdc57 Compiler squawked because a typed function had no return, create a dummy value
to return.
2003-08-11 19:33:49 +00:00
curt
e5221f3758 Fix some compiler warnings. 2003-08-11 19:31:50 +00:00
ehofman
fc29f5d522 Back out the patch that made fgLoadAircraft a static function 2003-08-11 17:34:16 +00:00
ehofman
0f6b618381 Make the aircraft loader function static 2003-08-11 08:50:30 +00:00
ehofman
0a7cc77d5e Initialize some variables 2003-08-11 08:35:29 +00:00
ehofman
1263b55c8e Fix a problem with MSVC and fix some typos 2003-08-09 13:31:44 +00:00
curt
02b758c87b Oops, fix a typo. 2003-08-09 02:45:23 +00:00
curt
b206ef0a4b Add support for specifying a ";" delimited list of scenery locations to
search when loading scenery tiles.  (I am not set on using ";" as the
delimiter because it is a command separator in unix, but ":" is a critical
part of the windows file naming scheme (c:\foo\bar) so that is even worse.)

Example:

--fg-scenery=/stage/fgfs04/curt/Scenery-0.9.1/Scenery;/stage/helio1/curt/Scenery
-0.7.9
2003-08-08 20:11:22 +00:00
ehofman
85feefa59f Add partial support for using textures as a basis for cloud field geenration 2003-08-07 12:38:17 +00:00
david
1d4a7659fc Fix drag when engine is shut down, by avoiding negative RPM.
The Propeller class ignored negative RPM but still returned a torque
value, which ratcheted up a higher and higher negative RPM until drag
overwhelmed the aircraft.

In reality, the propeller should windmill at a reasonable postive RPM,
introducing a constant drag on the aircraft -- the propeller should
*not* stop unless the plane is flying very slowly.  That's a future
project.
2003-08-06 21:38:01 +00:00
curt
c2684e9bc6 Norman Vine:
Add commands to increase/decrease the fog visibility.
2003-08-06 17:13:42 +00:00
ehofman
6834e86f94 Add 3d cloud support back in 2003-08-04 17:57:15 +00:00
ehofman
7ede111d12 Add a /test/scene_lighting property to switch between new and old behavior 2003-08-04 09:34:55 +00:00
ehofman
3d07fa8bda Update the ambient, diffuse and specular scenery colors to match the real world more closely 2003-08-03 09:54:02 +00:00
ehofman
a315df50f8 Update scene lighting 2003-08-02 12:45:15 +00:00
curt
807c4047dd Add support for communicating a flap motor failure. 2003-08-01 19:37:20 +00:00
curt
562ce6f5e2 Ooops, I added another item to what I write to the buffer, but
forgot to make it big enough to hold the new item.  This was manifesting
itself as a crash on reset (if the ExternalPipe FDM was being used.)
2003-08-01 17:06:11 +00:00
curt
55f97b218e Interpolate failure conditions since they are part of the struct (more
of a formality for consistancies sake than a useful thing.)
2003-08-01 00:25:10 +00:00
curt
6d0456df08 Add several common engine faults to the net_ctrls structure. 2003-08-01 00:22:57 +00:00
curt
e6958608ce Annunciators cannot work if electrical system is not serviceable. 2003-08-01 00:22:14 +00:00
ehofman
5898b8f828 Needed for SimGear update 2003-07-31 14:47:56 +00:00
ehofman
62ce453136 Use a pointer to a structure instead of a large number of variables when calling a function to keep the stack clean 2003-07-31 09:06:15 +00:00
curt
29dcc1ca1e Compute teh altitude-agl if the remote end isn't sending it. 2003-07-31 01:44:40 +00:00
curt
429a5067d8 Make the property tree reading slightly more robust. 2003-07-31 01:43:57 +00:00
curt
b4d0b6dcd4 Fix a property name spelling error. 2003-07-31 01:41:46 +00:00
curt
d805b8166b Fix several mispellings of servicable->serviceable. 2003-07-30 00:43:25 +00:00
mselig
c0eea29af8 Fixes namespace conflict with the variable ch. Changed to chord_h. 2003-07-27 17:54:18 +00:00
ehofman
c1fa7f95bd Comment out the UIUC ground trimming code 2003-07-27 07:49:33 +00:00
david
f4b3f7a003 Ignore generated files. 2003-07-26 10:53:58 +00:00
ehofman
0ff5f409c0 Add the abillity to attach a propeller thruster to a turbine engine 2003-07-26 09:12:54 +00:00
ehofman
860545bfa9 This patch increases the threshold below which the uiuc models are forced above the ground. 2003-07-26 07:56:46 +00:00
mselig
7dd8eb61d0 Comments added to printf statments. 2003-07-26 00:19:14 +00:00
curt
ae1470d3d1 Do a santity check in case net->course_deviation_deg is bogus. 2003-07-25 20:10:09 +00:00
curt
c5110a3650 Try to make the replay system honor /sim/speed-up, but not fully working yet. 2003-07-25 20:09:30 +00:00
mselig
658a838ea0 Includes mods to greatly shorten the uiuc_recorder.cpp code. 2003-07-25 17:55:27 +00:00
mselig
6adfea97e4 Fixes compiler warning related to this gcc message: This file includes at least one deprecated or antiquated header. Also, mods made to improve the uiuc_recorder code. 2003-07-25 17:55:20 +00:00
mselig
6ae39d57fa Fixes compiler warning related to this gcc message: This file includes at least one deprecated or antiquated header. 2003-07-25 17:53:53 +00:00
mselig
2606555bf6 UIUC code initilization mods to tidy things up a bit. 2003-07-25 17:53:35 +00:00
mselig
9f518ef343 Adds a basic FDM model for LaRCsim debugging purposes. 2003-07-25 17:53:13 +00:00
mselig
27a7b7f5d9 Adds a basic FDM model for LaRCsim debugging purposes. There is a bug in FGFS-LaRCsim that I have yet to put my finger on. 2003-07-25 17:53:08 +00:00
ehofman
ae8199be38 Melchior FRANZ:
The jitter is most likely caused by the irregular frame rate and CPU clock dependent intervals. There's no easy way around that. I tried some fancy interpolation and all that -- to no avail.
2003-07-24 15:00:16 +00:00
ehofman
a2b71872ad This fixes the K to F conversion for the EGT output 2003-07-24 14:43:11 +00:00
curt
6bbc51c058 Fix an oversight/inefficiency spotted by Frederic Bouvier. We were passing a
*copy* of a very large data set to a function.
2003-07-23 17:50:45 +00:00
curt
3c41f15f18 Geoff McLane:
Attached is a 'slightly' updated config.h-msvc6 file.
You will note i have only couched the JOYSTICK into an #ifndef
and add the needed GLUT_H
2003-07-23 14:36:33 +00:00
curt
8e5d7cd156 Remove some debugging output. 2003-07-23 13:48:19 +00:00
curt
51b0331eb9 Fix a typo ... 2003-07-23 03:19:08 +00:00
curt
c672417725 Add gear animation effects to replay. 2003-07-22 23:46:11 +00:00
curt
b8ac00f0a6 Finish the list of values that need to be interpolated every frame. 2003-07-22 20:06:03 +00:00
curt
33afeef6f1 Handle agl data correctly (so that ultimately the replay system can place
aircraft shadows correctly.)
2003-07-22 20:05:38 +00:00
ehofman
9b545fd648 Fix a bug that would occur on 5GHz computers, and disable the altitude damping feature. 2003-07-22 08:51:31 +00:00
ehofman
e47c97844d Fix a devide by zero bug"src/Autopilot/newauto.cxx 2003-07-22 08:13:10 +00:00
david
45b16ad0c9 Eliminate divide-by-zero error. AI should spin down gradually again. 2003-07-22 02:05:50 +00:00
ehofman
4124ac31d7 This backs out only the target climb rate calculation fix for the time being,
maybe for good
2003-07-19 14:15:11 +00:00
curt
fff2989853 Modified the replay system to work without enabling the master or clock freeze. 2003-07-18 14:14:24 +00:00
ehofman
f2a2b21661 Small patch to expose the localizer property (e.g., true for ILS localizer) 2003-07-18 08:22:54 +00:00
ehofman
9c6fbbccea Fixes for MSVC and MipsPro 2003-07-18 08:14:21 +00:00
curt
75861ec95d Avoid collecting garbage data before the FDM is initialized. 2003-07-18 01:51:45 +00:00
curt
a3b28d16af Improvements to the replay subsystem.
- Handle rotational interpolation across the "zero" point.
- Bug fixes to the rotational interpolator
- Change intervals for medium term and long term data recorders.
2003-07-17 21:21:00 +00:00
curt
419f09f804 Curt:
I have added a fledgling replay system that records flight data and control
positions during the flight.

I have added an internal command called "replay" which will trigger a replay
of the entire saved flight data set.  This could be bound to a keyboard or
menu command, in fact this entire module is screaming for someone to build
a gui to control playback speed, amount of playback, etc.

This is the initial version so there are kinks that still need to be worked
out, please be patient.
2003-07-17 18:24:17 +00:00
ehofman
9c22c5678c Jim Wilson:
These changes should preserve previous functionality (with the exception of a
couple bug fixes).

Bugs fixed:
- AP no longer resets the error accumulator when switching altitude modes or
just closing the autopilot GUI.  It will not be necessary to collect the barf
bags after selecting a new altitude anymore.  Makes things much smoother.
- climb_rate calculation in the altitude hold mode included a factor that made
sense for the c172.  It is now scaled according to the configuration's target
climb rate.

Additions:
Autothrottle (supports speed control only) is more configurable and accurate.
VerticalSpeed mode added (automatically arms to altitude if flown toward
altitude setting).
Exposed various properties, added new lock properties.
2003-07-17 08:52:36 +00:00
tony
36183cbc3d Make initTheta() use the results of the search it performs. 2003-07-17 02:32:39 +00:00
david
2da219ef5e Update magvar model before using it to initialize compass error. 2003-07-17 00:26:38 +00:00
david
34e4ff4922 Kludge the HI error so that it initially matches the magnetic variation. 2003-07-17 00:06:03 +00:00
david
6077e8a824 Added options to set up avionics from the command line:
--nav1=[radial:]frequency
  --nav2=[radial:]frequency
  --adf=[rotation:]frequency
  --dme="nav1"|"nav2"|frequency
2003-07-16 23:34:07 +00:00
david
16e9d1940b Don't snap to runway heading if an offset azimuth is supplied. 2003-07-16 19:12:02 +00:00
david
b8a8d2194a More turbulence tweaks and fixes.
Skip turbulence calculations with magnitude is 0.
2003-07-14 22:34:08 +00:00
david
5d3b58438a Make sure sign is preserved for turbulence direction. 2003-07-14 20:48:23 +00:00
ehofman
a0d90b9746 Framerate independent viewer fixes from Melchior FRANZ 2003-07-14 14:20:45 +00:00
ehofman
3179cb441a Make it possible to either select the 2d or the 3d HUD 2003-07-14 13:57:11 +00:00
tony
16c029c609 Fix for setting initial pitch angle on the ground. 2003-07-14 11:47:25 +00:00
david
9d318461b9 It's a direction, not an axis. The z direction is the one that should
occur full force for turbulence.
2003-07-13 20:18:51 +00:00
david
1691d3ba19 Add the ability to control turbulence rate as well as magnitude.
Square the normalized direction acceleration for the y and z axes, so
that turbulence predominantly affects pitch.

Bind to the /environment/turbulence/magnitude-norm and
/environment/turbulence/rate-hz properties in FlightGear.
2003-07-13 20:13:18 +00:00
ehofman
7e15ed39a1 Latest changes to the viewer code from Melchior FRANZ 2003-07-12 09:52:26 +00:00
ehofman
6e174947df Melchior FRANZ:
The current chase view respects heading but ignores roll & pitch. And it follows heading without delay, which makes the viewer behave quite strange. This change makes the chase view feel more natural. You aren't fixed behind the plane, but follow all its movements with a delay.

Erik Hofman:
I've decided not to add the patch to preferences.xml in the base package because something feels funny with that. I think there needs to be some more discussion about it.
2003-07-11 08:58:26 +00:00
curt
a47f8cabab Add normalized control surface positions to net_fdm.hxx structure.
Convert several double values to float since the extra precision is not
  needed and it just wastes network bandwidth.
2003-07-10 18:55:41 +00:00
ehofman
ab15297e67 FlightGear can handle network connections even without multiplayer support 2003-07-09 19:55:08 +00:00
ehofman
0700498e6f Changes to reflect the code reorganization from CUrtis 2003-07-09 14:45:02 +00:00
david
17b49a9021 Use the new splash screens. 2003-07-08 02:29:14 +00:00
curt
85de2452a3 A couple fixes so the nav/ils heading hold will work again. 2003-07-07 21:19:46 +00:00
ehofman
19d08953e3 Split up into and . Fix a typo for FreeBSD. And do some Makefile cleanups 2003-07-07 13:57:43 +00:00
ehofman
92ae2adeb1 Fix a mistake 2003-07-07 13:56:23 +00:00
ehofman
7b778e859c Replace some of the most used fgGetXXXX() calls with a local variable. The next best thing would be replacing the fgGetXXXX()functions with cached pointers 2003-07-05 09:59:03 +00:00
david
ba8b2bfca3 Rename some existing variables/methods in the navcomm module for
clarity:

  nav_radial => nav_target_radial (same as selected, except for a LOC)
  nav_heading => nav_reciprocal_radial
  nav_magvar => nav_twist (it's not always the same as magvar)
  nav_heading_needle_deflection => nav_cdi_deflection
  nav_gs_needle_deflection => nav_gs_deflection

Added nav_radial back in, but now it shows the current radial from the
VOR, as one would expect.  This value also appears in the
/radios/nav[*]/radials/actual-deg property.
2003-07-04 19:13:03 +00:00
david
fa4d245555 Change a spelling. 2003-07-03 17:13:03 +00:00
david
9eef30ff6e Fix the property /radios/nav[*]/radials/actual-deg to show the radial
that the aircraft is on.
2003-07-03 17:10:32 +00:00
ehofman
a1968ecb95 Jim Wilson:
This patch exposes the nav_id--Navaid (VOR/ILS) IDs--in the property tree for use in EFIS displays.  Both the string and individual integer (char) values are published.


Erik Hofman:
I have converted all sprintf() functions in navcom.cxx into snprintf() for some extra securety.
2003-07-03 08:51:19 +00:00
ehofman
709f57fe91 Add the ability to add repeat intervals to joystick buttons using the interval-sec property 2003-07-02 19:21:11 +00:00
curt
b1bfd1aa27 Tweaks to presets logic. 2003-07-02 16:24:50 +00:00
david
1b390135a1 Make the inclinometer a little more lively. 2003-07-01 21:22:01 +00:00
david
16635b6b98 Move the turbulence magnitude away from the peaks. 2003-07-01 20:52:12 +00:00
ehofman
27abc68450 Jim Wilson:
This patch adds an "interval-sec" property which allows fixing an interval in seconds (or fraction of seconds) for the repeats for emulated axis controls (digital hats) on joysticks.
2003-07-01 16:32:00 +00:00
ehofman
53aceeafe8 Solaris namespace clash fix 2003-07-01 16:12:21 +00:00
ehofman
9d10d88f8f Fix a problem where the compass goes negative by the variation when close to 360 degrees 2003-07-01 08:19:41 +00:00
david
c5be967fba Avoid strong oscillations at turbulence extremes. 2003-06-29 21:17:21 +00:00
ehofman
484bab7bc8 Make sure the functions won't be called if the extension is not supported. This also clears the main loop a bitsrc/Main/main.cxx. 2003-06-29 17:14:13 +00:00
ehofman
fb6c04ec7f Add Lee Elliott's per aircraft configurable terrain following factor 2003-06-29 08:27:45 +00:00
ehofman
0ff6c68c01 This patch normalizes the heading value YASim reports to the interface 2003-06-28 21:49:45 +00:00
ehofman
5e2dacbee5 Update required for the fastmath module 2003-06-28 12:19:58 +00:00
ehofman
455b2b3a91 Use sqrt(x) and x*x instead of pow(x, 0.5) and pow(x, 2.0) 2003-06-27 21:29:48 +00:00