Free fixed gear tricks software for linux

The FlightGear flight simulator project is an open-source, multi-platform, cooperative flight simulator development project. Source code for the entire project is available and licensed under the GNU General Public License.

The goal of the FlightGear project is to create a sophisticated flight simulator framework for use in research or academic environments, for the development and pursuit of other interesting flight simulation ideas, and as an end-user application. We are developing a sophisticated, open simulation framework that can be expanded and improved upon by anyone interested in contributing.

There are many exciting possibilities for an open, free flight sim. We hope that this project will be interesting and useful to many people in many areas.

FlightGear is a free flight simulator project. It is being developed through the gracious contributions of source code and spare time by many talented people from around the globe. Among the many goals of this project are the quest to minimize short cuts and "do things right", the quest to learn and advance knowledge, and the quest to have better toys to play with.

The idea for Flight Gear was born out of a dissatisfaction with current commercial PC flight simulators. A big problem with these simulators is their proprietariness and lack of extensibility. There are so many people across the world with great ideas for enhancing the currently available simulators who have the ability to write code, and who have a desire to learn and contribute. Many people involved in education and research could use a spiffy flight simulator frame work on which to build their own projects; however, commercial simulators do not lend themselves to modification and enhancement. The Flight Gear project is striving to fill these gaps.

There are a wide range of people interested and participating in this project. This is truly a global effort with contributors from just about every continent. Interests range from building a realistic home simulator out old airplane parts, to university research and instructional use, to simply having a viable alternative to commercial PC simulators.

Flight Dynamics Models

With FlightGear it is possible to choose between three primary Flight Dynamics Models. It is possible to add new dynamics models or even interface to external "proprietary" flight dynamics models:

1. JSBSim: JSBSim is a generic, 6DoF flight dynamics model for simulating the motion of flight vehicles. It is written in C++. JSBSim can be run in a standalone mode for batch runs, or it can be the driver for a larger simulation program that includes a visuals subsystem (such as FlightGear.) In both cases, aircraft are modeled in an XML configuration file, where the mass properties, aerodynamic and flight control properties are all defined.

2. YASim: This FDM is an integrated part of FlightGear and uses a different approach than JSBSim by simulating the effect of the airflow on the different parts of an aircraft. The advantage of this approach is that it is possible to perform the simulation based on geometry and mass information combined with more commonly available performance numbers for an aircraft. This allows for quickly constructing a plausibly behaving aircraft that matches published performance numbers without requiring all the traditional aerodynamic test data.

3. UIUC: This FDM is based on LaRCsim originally written by the NASA. UIUC extends the code by allowing aircraft configuration files instead and by adding code for simulation of aircraft under icing conditions.

UIUC (like JSBSim) uses lookup tables to retrieve the component aerodynamic force and moment coefficients for an aircraft... and then uses these coefficients to calculate the sum of the forces and moments acting on the aircraft.

Extensive and Accurate World Scenery Data Base

Over 20,000 real world airports included in the full scenery set.
Correct runway markings and placement, correct runway and approach lighting.
Taxiways available for many larger airports (even including the green center line lights when appropriate.)
Sloping runways (runways change elevation like they usually do in real life.)
Directional airport lighting that smoothly changes intensity as your relative view direction changes.
World scenery fits on 3 DVDs. (Im not sure thats a feature or a problem!) But it means we have pretty detailed coverage of the entire world.
Accurate terrain worldwide, based on the most recently released SRTM terrain data.) 3 arc second resolution (about 90m post spacing) for North and South America, Europe, Asia, Africa, and Australia.
Scenery includes all vmap0 lakes, rivers, roads, railroads, cities, towns, land cover, etc.
Nice scenery night lighting with ground lighting concentrated in urban areas (based on real maps) and headlights visible on major highways. This allows for realistic night VFR flying with the ability to spot towns and cities and follow roads.
Scenery tiles are paged (loaded/unloaded) in a separate thread to minimize the frame rate hit when you need to load new areas.

Accurate and Detailed Sky Model

FlightGear implements extremely accurate time of day modeling with correctly placed sun, moon, stars, and planets for the specified time and date. FlightGear can track the current computer clock time in order to correctly place the sun, moon, stars, etc. in their current and proper place relative to the earth. If its dawn in Sydney right now, its dawn in the sim right now when you locate yourself in virtual Sidney. The sun, moon, stars, and planets all follow their correct courses through the sky. This modeling also correctly takes into account seasonal effects so you have 24 hour days north of the arctic circle in the summer, etc. We also illuminate the correctly placed moon with the correctly placed sun to get the correct phase of the moon for the current time/date, just like in real life.

Flexible and Open Aircraft Modeling System

FlightGear has the ability to model a wide variety of aircraft. Currently you can fly the 1903 Wright Flyer, strange flapping wing "ornithopters", a 747 and A320, various military jets, and several light singles. FlightGear has the ability to model those aircraft and just about everything in between.

FlightGear has extremely smooth and fluid instrument animation that updates at the same rate as your out-the-window view updates (i.e. as fast as your computer can crank, and not artificially limited and chunky like in some sims.)

FlightGear has the infrastructure to allow aircraft designers to build fully animated, fully operational, fully interactive 3d cockpits (which even update and display correctly from external chase plane views.)

FlightGear realistically models real world instrument behavior. Instruments that lag in real life, lag correctly in FlightGear, gyro drift is modeled correctly, the magnetic compass is subject to aircraft body forces -- all those things that make real world flying a challenge.

FlightGear also accurately models many instrument and system failures. If the vacuum system fails, the HSI gyros spin down slowly with a corresponding degradation in response as well as a slowly increasing bias/error.

Moderate Hardware Requirements

The intention of FlightGear is to look nice, but not at the expense of other aspects of a realistic simulator. Our focus is not on competing in the "game" market and not on the ultra-flashy graphic tricks.

The result is a simulator with moderate hardware requirements to run at smooth frame rates. You can be reasonably happy on a $500-1000 (USD) machine (possibly even less if you are careful) and dont necessarily need $3000 (USD) worth of new hardware like you do with the many of the newest games.

That said, the more hardware you throw at FlightGear, the better it looks and runs, so dont feel like you have to chuck your expensive new hardware if you just purchased it. :-)

Internal Properties EXPOSED!

FlightGear allows users and aircraft designers access to a very large number of internal state variables via numerous internal and external access mechanisms. These state variables are organized into a convenient hierarchal "property" tree.

Using the properties tree it is possible to monitor just about any internal state variable in FlightGear. Its possible to remotely control FlightGear from an external script. You can create model animations, sound effects, instrument animations and network protocols for about any situation imaginable just by editing a small number of human readable configuration files. This is a powerful system that makes FlightGear immensely flexible, configurable, and adaptable.

Networking options

A number of networking options allow FlightGear to communicate with other instances of FlightGear, GPS receivers, external flight dynamics modules, external autopilot or control modules, as well as other software such as the Open Glass Cockpit project and the Atlas mapping utility.

A generic input/output option allows for a user defined output protocol to a file, serial port or network client.

A multi player protocol is available for using FlightGear on a local network in a multi aircraft environment, for example to practice formation flight or for tower simulation purposes.

The powerful network options make it possible to synchronize several instances of FlightGear allowing for a multi-display, or even a cave environment. If all instances are running at the same frame rate consistently, it is possible to get extremely good and tight synchronization between displays.

Flight Gear and its source code have intentionally been kept open, available, and free. In doing so, we are able to take advantage of the efforts of tremendously talented people from around the world. Contrast this with the traditional approach of commercial software vendors, who are limited by the collective ability of the people they can hire and pay. Our approach brings its own unique challenges and difficulties, but we are confident (and other similarly structured projects have demonstrated) that in the long run we can outclass the commercial "competition."

Contributing to Flight Gear can be educational and a lot of fun. A long time developer, Curtis Olson, had this to say about working on Flight Gear:

Personally, Flight Gear has been a great learning experience for me. I have been exposed to many new ideas and have learned a tremendous amount of "good stuff" in the process of discussing and implementing various Flight Gear subsystems. If for no other reason, this alone makes it all worth while.

Virge is mail scanner written in C, which replaces/substitutes procmail for a while, checks the incoming mail, and then sends the mail to the procmail. It will check mail for viruses and/or attachment names. Check the FEATURES/README/NEWS files for more details. Virge requires Sendmail and (optionally) AVPDaemon, Sophie or Trophie (to check attachments for viruses).
Virge replaces temporarily procmail. When new mail comes in, Sendmail will pass the contents of the mail to Virge. At that point, Virge performs set of checks:
Checks if the mail has attachments. If it does not, it sends it to procmail for delivery.
If mail has attachments, Virge creates temporary directory, unpacks attachments there, and asks AVP/Sophie/Trophie to scan the temporary directory for viruses. Virge was created with 2 things in mind: performance and security. Because of performance issues, it was not feasible to use any command line scanners like TrendMicro of McAfee ones.
AVP/Sophie/Trophie are instructed to scan attachments for viruses next. If it finds any viruses, mail is immediately isolated in a directory not (hopefully) accessible to anyone except administrators.
If no viruses were found, Virge will then perform attachment check, and see if any of the attachments are not allowed to be sent to the end user. A configuration file is consulted for list of extensions (or full filenames) that should not be allowed in. If any such attachments were found, tricky part comes - Virge will *hopefully* properly "rewrite" the whole email, and strip the attachments that are not allowed. Small notice is attached at the end of the mail, with names of stripped attachments. Mail is also isolated, in case poor overworked sysadmin ever gets some free time to take a closer look.
IMPORTANT: Please, keep in mind that Virge will *NOT* rewrite & send mails when virus has been found. I will *NOT* implement any such features, since it doesnt make any sense (I havent seen a mail with virus that actually had some valuable content in it for many months - maybe even years).
If AVP/Sophie/Trophie are not available (daemon is down), Virge will still deliver mails and annoy admins through syslog messages. Attachment check is still performed.
Users for which no checks should be performed can also be configured. Location of the file can be specified in the configuration file.
Virge is definitelly trying to not let any lame script kiddies abuse it in any way. It is trying to resist to race conditions, buffer overflows, and similar neat tricks. No guarantees, of course, that there are no security problems in Virge.
Virge tries to be as fast as possible, and not waste CPU time or any other resources. It is still possible to make it perform even better, although I presume it would be in 1-5% range. Will take some more time later, and try to fix all the small performance problems.
And yes - Virge *is* fast. I have made a complete Virge V1 in Perl some time ago, but it was absolute failure. Although I tried to use as little modules as possible and make it as fast as possible... it was crap. 2 minutes after I started a script that sends 3-5 mails per second, I started wondering "Why the hell cant I login to the mailserver anymore?". Perl is nice, but its not good for tools like this. Not at all (except if you have low traffic on your mailserver).
And Virge still needs a *lot* of testing. I have tried to test Virge with many different mail (MIME) formats and tried different tricks in order to bypass its decoding techniques (in order to send a virus or .exe to users), but it handles things pretty well. There are cases, though, when it is possible to trick librfc2045 and send attachments that dont get caught, but those attachments are violating RFCs anyway. If your mail client is so stupid to decode invalid/malformed attachments/mails - you deserved it. Dont use stupid mail clients then. Im not going to start adding all those crappy features into Virge that would let someone detect all possible tricks which can be used. Use good mail clients, dont rely on Virge to save you.
Main features:
- Virge can check every incoming mail for attachments, and can remove attachments that are considered dangerous.
- "Dangerous" can be defined:
- email with specific kinds of attachments (e.g., .EXE, .COM, etc.)
- email that contains a virus as identified by Sophie ( http://www.vanja.com )
- email that contains a virus as identified by trophie ( http://www.vanja.com )
- email that contains a virus as identified by AVPDaemon (http://www.avp.ch)
- Any combination of the above.
- Dangerous email can trigger:
- rewriting that removes virus.
- alert back to sender.
- alert to recepient.
- alert to system manager.
- rewrite to remove virus.
- All offending mail messages can be isolated for later reviewing.
- Written in C, so it is very fast, doesnt waste resources, and doesnt depend on a complicated perl installation (which is subject to breaking).
- Notification can be sent (configurable) to sender/recipient of suspicious/infected mail. Templates can be used to define the layout of the mail.
- Regular expressions can be used for filename matching
- Virge was made with security in mind, and should be hard to abuse
- Can be configured to fail open or fail closed if load on the machine goes too high.
- Virge 3.0 designed for easy integration with Postfix

Games::Euchre::Trick is a trick class for Euchre card game.

Only one Trick instance is alive at one time per Euchre game. The Trick keeps track of which cards have been played, and provides useful functions to determine which cards are legal plays, as well as who is the winner of the trick.

The trick class makes the determination of which card beats which card, given the current trump and lead. The trick class knows how to handle an alone hand and it calls the playCard() method for each player in turn in its play() method, usually called from the Games::Euchre->playHand() method.

f-IDE is a development environment for C++.
f-IDE project provides powerful editing, code intelligence, and search capabilities that reduce development time.
Enhancements:
- A bug with starting development on an application has been fixed.

dxgallery is a static HTML image gallery generator which uses dynamic columns and fixed pixel image scaling. It also tries to look pretty.
I created dxgallery because it is the only one I know of that:
- Uses a dynamic number of columns.
- Uses consistent pixel count scaling.
- Is the prettiest.
It also uses entirely static html which can be generated on a different machine from the one which serves it.
And it conforms to XHTML 1.0 Transitional.
Enhancements:
- Fixed unsightly wrapping.

libutempter project provides a library interface for terminal emulators such as screen and xterm to record user sessions to utmp and wtmp files.
Enhancements:
- FreeBSD support has been fixed.

Creditor 0.4 offers you a n excellent and powerful Qt4 financial calculator which is veru useful for credit payments! Creditor is a finacial program that can calculate credit payments (monthly payments) for you. Simple, and it just works!

Enhancements: Some small bug-fixed